2019-06-04 16:11:33 +08:00
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// SPDX-License-Identifier: GPL-2.0-only
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2009-08-19 01:06:19 +08:00
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/* The industrial I/O core
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*
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* Copyright (c) 2008 Jonathan Cameron
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*
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* Based on elements of hwmon and input subsystems.
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*/
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2013-10-24 19:53:00 +08:00
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#define pr_fmt(fmt) "iio-core: " fmt
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2023-01-18 15:48:28 +08:00
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#include <linux/anon_inodes.h>
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#include <linux/cdev.h>
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#include <linux/debugfs.h>
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2009-08-19 01:06:19 +08:00
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#include <linux/device.h>
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2023-01-18 15:48:28 +08:00
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#include <linux/err.h>
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2009-08-19 01:06:19 +08:00
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#include <linux/fs.h>
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2023-01-18 15:48:28 +08:00
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#include <linux/idr.h>
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#include <linux/kdev_t.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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2009-08-19 01:06:19 +08:00
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#include <linux/poll.h>
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iio: Allow to read mount matrix from ACPI
Currently mount matrix is allowed in Device Tree, though there is
no technical issue to extend it to support ACPI.
Convert the function to use device_property_read_string_array() and
thus allow to read mount matrix from ACPI if available.
Example of use in _DSD method:
Name (_DSD, Package ()
{
ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
Package ()
{
Package () { "mount-matrix", Package() {
"1", "0", "0",
"0", "0.866", "0.5",
"0", "-0.5", "0.866",
} },
}
})
At the same time drop the "of" prefix from its name and
convert current users.
No functional change intended.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-02-22 01:02:46 +08:00
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#include <linux/property.h>
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2009-10-13 02:18:09 +08:00
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#include <linux/sched.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
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#include <linux/slab.h>
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2023-01-18 15:48:28 +08:00
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#include <linux/wait.h>
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#include <linux/iio/buffer.h>
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#include <linux/iio/buffer_impl.h>
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#include <linux/iio/events.h>
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2020-06-30 12:57:03 +08:00
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#include <linux/iio/iio-opaque.h>
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2023-01-18 15:48:28 +08:00
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#include <linux/iio/iio.h>
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#include <linux/iio/sysfs.h>
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2011-08-13 00:56:03 +08:00
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#include "iio_core.h"
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2011-08-25 00:28:38 +08:00
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#include "iio_core_trigger.h"
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2011-08-30 19:41:15 +08:00
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2012-08-26 20:43:00 +08:00
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/* IDA to assign each registered device a unique id */
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2010-09-05 00:54:43 +08:00
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static DEFINE_IDA(iio_ida);
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2009-08-19 01:06:19 +08:00
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2011-08-30 19:32:48 +08:00
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static dev_t iio_devt;
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2009-08-19 01:06:19 +08:00
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#define IIO_DEV_MAX 256
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2010-05-04 21:43:00 +08:00
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struct bus_type iio_bus_type = {
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2009-08-19 01:06:19 +08:00
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.name = "iio",
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};
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2010-05-04 21:43:00 +08:00
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EXPORT_SYMBOL(iio_bus_type);
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2009-08-19 01:06:19 +08:00
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2012-03-01 17:51:03 +08:00
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static struct dentry *iio_debugfs_dentry;
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2011-09-03 00:14:34 +08:00
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static const char * const iio_direction[] = {
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[0] = "in",
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[1] = "out",
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};
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2011-09-03 00:14:45 +08:00
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static const char * const iio_chan_type_name_spec[] = {
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2011-09-03 00:14:34 +08:00
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[IIO_VOLTAGE] = "voltage",
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2011-05-18 21:42:02 +08:00
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[IIO_CURRENT] = "current",
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[IIO_POWER] = "power",
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2011-07-08 03:01:54 +08:00
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[IIO_ACCEL] = "accel",
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2011-10-05 22:27:59 +08:00
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[IIO_ANGL_VEL] = "anglvel",
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2011-05-18 21:40:51 +08:00
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[IIO_MAGN] = "magn",
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2011-07-08 03:01:54 +08:00
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[IIO_LIGHT] = "illuminance",
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[IIO_INTENSITY] = "intensity",
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2011-07-08 03:01:55 +08:00
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[IIO_PROXIMITY] = "proximity",
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2011-07-08 03:01:54 +08:00
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[IIO_TEMP] = "temp",
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2011-05-18 21:40:51 +08:00
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[IIO_INCLI] = "incli",
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[IIO_ROT] = "rot",
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[IIO_ANGL] = "angl",
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2011-07-08 03:01:54 +08:00
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[IIO_TIMESTAMP] = "timestamp",
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2011-09-03 00:14:43 +08:00
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[IIO_CAPACITANCE] = "capacitance",
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2012-04-27 16:58:34 +08:00
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[IIO_ALTVOLTAGE] = "altvoltage",
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2012-05-16 23:46:42 +08:00
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[IIO_CCT] = "cct",
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2012-11-20 21:36:00 +08:00
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[IIO_PRESSURE] = "pressure",
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2013-12-01 23:08:00 +08:00
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[IIO_HUMIDITYRELATIVE] = "humidityrelative",
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2014-11-10 20:45:30 +08:00
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[IIO_ACTIVITY] = "activity",
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2014-11-10 20:45:32 +08:00
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[IIO_STEPS] = "steps",
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2015-01-12 03:10:07 +08:00
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[IIO_ENERGY] = "energy",
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2015-01-12 03:10:08 +08:00
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[IIO_DISTANCE] = "distance",
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2015-01-12 03:10:09 +08:00
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[IIO_VELOCITY] = "velocity",
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2015-09-14 11:26:11 +08:00
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[IIO_CONCENTRATION] = "concentration",
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2015-09-14 11:26:12 +08:00
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[IIO_RESISTANCE] = "resistance",
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2016-01-27 10:34:30 +08:00
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[IIO_PH] = "ph",
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2016-03-20 23:20:23 +08:00
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[IIO_UVINDEX] = "uvindex",
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2016-05-25 12:29:19 +08:00
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[IIO_ELECTRICALCONDUCTIVITY] = "electricalconductivity",
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2016-09-29 01:59:49 +08:00
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[IIO_COUNT] = "count",
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[IIO_INDEX] = "index",
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2017-01-05 18:24:03 +08:00
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[IIO_GRAVITY] = "gravity",
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2018-05-22 15:52:32 +08:00
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[IIO_POSITIONRELATIVE] = "positionrelative",
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2018-07-21 01:34:25 +08:00
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[IIO_PHASE] = "phase",
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2018-12-15 02:28:01 +08:00
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[IIO_MASSCONCENTRATION] = "massconcentration",
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2011-05-18 21:40:51 +08:00
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};
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2011-09-03 00:14:39 +08:00
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static const char * const iio_modifier_names[] = {
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2011-05-18 21:40:51 +08:00
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[IIO_MOD_X] = "x",
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[IIO_MOD_Y] = "y",
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[IIO_MOD_Z] = "z",
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2015-06-21 05:52:30 +08:00
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[IIO_MOD_X_AND_Y] = "x&y",
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[IIO_MOD_X_AND_Z] = "x&z",
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[IIO_MOD_Y_AND_Z] = "y&z",
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[IIO_MOD_X_AND_Y_AND_Z] = "x&y&z",
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[IIO_MOD_X_OR_Y] = "x|y",
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[IIO_MOD_X_OR_Z] = "x|z",
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[IIO_MOD_Y_OR_Z] = "y|z",
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[IIO_MOD_X_OR_Y_OR_Z] = "x|y|z",
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2012-05-05 17:39:22 +08:00
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[IIO_MOD_ROOT_SUM_SQUARED_X_Y] = "sqrt(x^2+y^2)",
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2012-05-05 17:56:41 +08:00
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[IIO_MOD_SUM_SQUARED_X_Y_Z] = "x^2+y^2+z^2",
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2011-09-03 00:14:39 +08:00
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[IIO_MOD_LIGHT_BOTH] = "both",
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[IIO_MOD_LIGHT_IR] = "ir",
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2012-05-16 23:46:42 +08:00
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[IIO_MOD_LIGHT_CLEAR] = "clear",
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[IIO_MOD_LIGHT_RED] = "red",
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[IIO_MOD_LIGHT_GREEN] = "green",
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[IIO_MOD_LIGHT_BLUE] = "blue",
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2016-03-20 23:20:22 +08:00
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[IIO_MOD_LIGHT_UV] = "uv",
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2018-07-20 04:26:24 +08:00
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[IIO_MOD_LIGHT_DUV] = "duv",
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2014-04-29 07:51:00 +08:00
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[IIO_MOD_QUATERNION] = "quaternion",
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2014-02-06 00:57:00 +08:00
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[IIO_MOD_TEMP_AMBIENT] = "ambient",
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[IIO_MOD_TEMP_OBJECT] = "object",
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2014-07-18 02:18:00 +08:00
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[IIO_MOD_NORTH_MAGN] = "from_north_magnetic",
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[IIO_MOD_NORTH_TRUE] = "from_north_true",
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[IIO_MOD_NORTH_MAGN_TILT_COMP] = "from_north_magnetic_tilt_comp",
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[IIO_MOD_NORTH_TRUE_TILT_COMP] = "from_north_true_tilt_comp",
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2014-11-10 20:45:30 +08:00
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[IIO_MOD_RUNNING] = "running",
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[IIO_MOD_JOGGING] = "jogging",
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[IIO_MOD_WALKING] = "walking",
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[IIO_MOD_STILL] = "still",
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2015-01-12 03:10:09 +08:00
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[IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z] = "sqrt(x^2+y^2+z^2)",
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2015-05-23 00:17:38 +08:00
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[IIO_MOD_I] = "i",
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[IIO_MOD_Q] = "q",
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2015-09-14 11:26:11 +08:00
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[IIO_MOD_CO2] = "co2",
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[IIO_MOD_VOC] = "voc",
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2018-12-15 02:28:01 +08:00
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[IIO_MOD_PM1] = "pm1",
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[IIO_MOD_PM2P5] = "pm2p5",
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[IIO_MOD_PM4] = "pm4",
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[IIO_MOD_PM10] = "pm10",
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2020-06-09 11:01:16 +08:00
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[IIO_MOD_ETHANOL] = "ethanol",
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[IIO_MOD_H2] = "h2",
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2020-07-23 14:29:43 +08:00
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[IIO_MOD_O2] = "o2",
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2022-09-07 21:21:52 +08:00
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[IIO_MOD_LINEAR_X] = "linear_x",
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[IIO_MOD_LINEAR_Y] = "linear_y",
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[IIO_MOD_LINEAR_Z] = "linear_z",
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2022-09-07 21:21:55 +08:00
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[IIO_MOD_PITCH] = "pitch",
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[IIO_MOD_YAW] = "yaw",
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[IIO_MOD_ROLL] = "roll",
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2011-05-18 21:40:51 +08:00
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};
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/* relies on pairs of these shared then separate */
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static const char * const iio_chan_info_postfix[] = {
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2012-04-16 00:41:30 +08:00
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[IIO_CHAN_INFO_RAW] = "raw",
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[IIO_CHAN_INFO_PROCESSED] = "input",
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2011-10-27 00:41:36 +08:00
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[IIO_CHAN_INFO_SCALE] = "scale",
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[IIO_CHAN_INFO_OFFSET] = "offset",
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[IIO_CHAN_INFO_CALIBSCALE] = "calibscale",
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[IIO_CHAN_INFO_CALIBBIAS] = "calibbias",
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[IIO_CHAN_INFO_PEAK] = "peak_raw",
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[IIO_CHAN_INFO_PEAK_SCALE] = "peak_scale",
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[IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW] = "quadrature_correction_raw",
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[IIO_CHAN_INFO_AVERAGE_RAW] = "mean_raw",
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2011-11-27 19:39:12 +08:00
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[IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY]
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= "filter_low_pass_3db_frequency",
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2015-05-13 18:26:42 +08:00
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[IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY]
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= "filter_high_pass_3db_frequency",
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2012-04-13 18:33:31 +08:00
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[IIO_CHAN_INFO_SAMP_FREQ] = "sampling_frequency",
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2012-04-27 16:58:34 +08:00
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[IIO_CHAN_INFO_FREQUENCY] = "frequency",
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[IIO_CHAN_INFO_PHASE] = "phase",
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2012-05-11 17:36:53 +08:00
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[IIO_CHAN_INFO_HARDWAREGAIN] = "hardwaregain",
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2012-09-05 20:56:00 +08:00
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[IIO_CHAN_INFO_HYSTERESIS] = "hysteresis",
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2021-02-07 15:00:46 +08:00
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[IIO_CHAN_INFO_HYSTERESIS_RELATIVE] = "hysteresis_relative",
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2013-09-08 23:20:00 +08:00
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[IIO_CHAN_INFO_INT_TIME] = "integration_time",
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2014-11-10 20:45:32 +08:00
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[IIO_CHAN_INFO_ENABLE] = "en",
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2014-11-10 20:45:33 +08:00
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[IIO_CHAN_INFO_CALIBHEIGHT] = "calibheight",
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2015-01-12 03:10:10 +08:00
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[IIO_CHAN_INFO_CALIBWEIGHT] = "calibweight",
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2015-01-28 02:41:52 +08:00
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[IIO_CHAN_INFO_DEBOUNCE_COUNT] = "debounce_count",
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[IIO_CHAN_INFO_DEBOUNCE_TIME] = "debounce_time",
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2015-03-30 16:34:58 +08:00
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[IIO_CHAN_INFO_CALIBEMISSIVITY] = "calibemissivity",
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2015-04-30 02:16:39 +08:00
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[IIO_CHAN_INFO_OVERSAMPLING_RATIO] = "oversampling_ratio",
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2019-11-20 22:47:52 +08:00
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[IIO_CHAN_INFO_THERMOCOUPLE_TYPE] = "thermocouple_type",
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2020-09-07 05:02:31 +08:00
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[IIO_CHAN_INFO_CALIBAMBIENT] = "calibambient",
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2022-06-26 20:29:32 +08:00
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[IIO_CHAN_INFO_ZEROPOINT] = "zeropoint",
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2011-05-18 21:40:51 +08:00
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};
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2021-04-27 01:49:03 +08:00
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/**
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* iio_device_id() - query the unique ID for the device
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* @indio_dev: Device structure whose ID is being queried
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*
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* The IIO device ID is a unique index used for example for the naming
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* of the character device /dev/iio\:device[ID]
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*/
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int iio_device_id(struct iio_dev *indio_dev)
|
|
|
|
{
|
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
|
|
|
|
|
|
|
return iio_dev_opaque->id;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(iio_device_id);
|
2011-05-18 21:40:51 +08:00
|
|
|
|
2022-02-07 22:38:36 +08:00
|
|
|
/**
|
|
|
|
* iio_buffer_enabled() - helper function to test if the buffer is enabled
|
|
|
|
* @indio_dev: IIO device structure for device
|
|
|
|
*/
|
|
|
|
bool iio_buffer_enabled(struct iio_dev *indio_dev)
|
|
|
|
{
|
2022-02-07 22:38:38 +08:00
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
|
|
|
|
|
|
|
return iio_dev_opaque->currentmode
|
2022-02-07 22:38:36 +08:00
|
|
|
& (INDIO_BUFFER_TRIGGERED | INDIO_BUFFER_HARDWARE |
|
|
|
|
INDIO_BUFFER_SOFTWARE);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(iio_buffer_enabled);
|
|
|
|
|
2020-06-30 12:57:05 +08:00
|
|
|
#if defined(CONFIG_DEBUG_FS)
|
2020-09-13 21:21:15 +08:00
|
|
|
/*
|
2020-06-30 12:57:05 +08:00
|
|
|
* There's also a CONFIG_DEBUG_FS guard in include/linux/iio/iio.h for
|
|
|
|
* iio_get_debugfs_dentry() to make it inline if CONFIG_DEBUG_FS is undefined
|
|
|
|
*/
|
|
|
|
struct dentry *iio_get_debugfs_dentry(struct iio_dev *indio_dev)
|
|
|
|
{
|
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
2022-07-28 02:18:54 +08:00
|
|
|
|
2020-06-30 12:57:05 +08:00
|
|
|
return iio_dev_opaque->debugfs_dentry;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(iio_get_debugfs_dentry);
|
|
|
|
#endif
|
|
|
|
|
2013-10-29 19:39:00 +08:00
|
|
|
/**
|
|
|
|
* iio_find_channel_from_si() - get channel from its scan index
|
|
|
|
* @indio_dev: device
|
|
|
|
* @si: scan index to match
|
|
|
|
*/
|
2011-12-06 05:37:10 +08:00
|
|
|
const struct iio_chan_spec
|
|
|
|
*iio_find_channel_from_si(struct iio_dev *indio_dev, int si)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < indio_dev->num_channels; i++)
|
|
|
|
if (indio_dev->channels[i].scan_index == si)
|
|
|
|
return &indio_dev->channels[i];
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2009-08-19 01:06:19 +08:00
|
|
|
/* This turns up an awful lot */
|
|
|
|
ssize_t iio_read_const_attr(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
char *buf)
|
|
|
|
{
|
2021-03-20 15:14:02 +08:00
|
|
|
return sysfs_emit(buf, "%s\n", to_iio_const_attr(attr)->string);
|
2009-08-19 01:06:19 +08:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(iio_read_const_attr);
|
|
|
|
|
2020-03-28 06:34:37 +08:00
|
|
|
/**
|
|
|
|
* iio_device_set_clock() - Set current timestamping clock for the device
|
|
|
|
* @indio_dev: IIO device structure containing the device
|
|
|
|
* @clock_id: timestamping clock posix identifier to set.
|
|
|
|
*/
|
|
|
|
int iio_device_set_clock(struct iio_dev *indio_dev, clockid_t clock_id)
|
2016-03-10 02:05:49 +08:00
|
|
|
{
|
|
|
|
int ret;
|
2020-06-30 12:57:08 +08:00
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
|
|
|
const struct iio_event_interface *ev_int = iio_dev_opaque->event_interface;
|
2016-03-10 02:05:49 +08:00
|
|
|
|
2022-10-12 23:16:20 +08:00
|
|
|
ret = mutex_lock_interruptible(&iio_dev_opaque->mlock);
|
2016-03-10 02:05:49 +08:00
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
if ((ev_int && iio_event_enabled(ev_int)) ||
|
|
|
|
iio_buffer_enabled(indio_dev)) {
|
2022-10-12 23:16:20 +08:00
|
|
|
mutex_unlock(&iio_dev_opaque->mlock);
|
2016-03-10 02:05:49 +08:00
|
|
|
return -EBUSY;
|
|
|
|
}
|
2021-04-27 01:49:11 +08:00
|
|
|
iio_dev_opaque->clock_id = clock_id;
|
2022-10-12 23:16:20 +08:00
|
|
|
mutex_unlock(&iio_dev_opaque->mlock);
|
2016-03-10 02:05:49 +08:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
2020-03-28 06:34:37 +08:00
|
|
|
EXPORT_SYMBOL(iio_device_set_clock);
|
2016-03-10 02:05:49 +08:00
|
|
|
|
2021-04-27 01:49:11 +08:00
|
|
|
/**
|
|
|
|
* iio_device_get_clock() - Retrieve current timestamping clock for the device
|
|
|
|
* @indio_dev: IIO device structure containing the device
|
|
|
|
*/
|
|
|
|
clockid_t iio_device_get_clock(const struct iio_dev *indio_dev)
|
|
|
|
{
|
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
|
|
|
|
|
|
|
return iio_dev_opaque->clock_id;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(iio_device_get_clock);
|
|
|
|
|
2016-03-10 02:05:49 +08:00
|
|
|
/**
|
|
|
|
* iio_get_time_ns() - utility function to get a time stamp for events etc
|
|
|
|
* @indio_dev: device
|
|
|
|
*/
|
|
|
|
s64 iio_get_time_ns(const struct iio_dev *indio_dev)
|
|
|
|
{
|
2018-06-18 23:31:36 +08:00
|
|
|
struct timespec64 tp;
|
2016-03-10 02:05:49 +08:00
|
|
|
|
|
|
|
switch (iio_device_get_clock(indio_dev)) {
|
|
|
|
case CLOCK_REALTIME:
|
2018-06-18 23:31:36 +08:00
|
|
|
return ktime_get_real_ns();
|
2016-03-10 02:05:49 +08:00
|
|
|
case CLOCK_MONOTONIC:
|
2018-06-18 23:31:36 +08:00
|
|
|
return ktime_get_ns();
|
2016-03-10 02:05:49 +08:00
|
|
|
case CLOCK_MONOTONIC_RAW:
|
2018-06-18 23:31:36 +08:00
|
|
|
return ktime_get_raw_ns();
|
2016-03-10 02:05:49 +08:00
|
|
|
case CLOCK_REALTIME_COARSE:
|
2018-06-18 23:31:36 +08:00
|
|
|
return ktime_to_ns(ktime_get_coarse_real());
|
2016-03-10 02:05:49 +08:00
|
|
|
case CLOCK_MONOTONIC_COARSE:
|
2018-06-18 23:31:36 +08:00
|
|
|
ktime_get_coarse_ts64(&tp);
|
|
|
|
return timespec64_to_ns(&tp);
|
2016-03-10 02:05:49 +08:00
|
|
|
case CLOCK_BOOTTIME:
|
2019-06-22 04:32:48 +08:00
|
|
|
return ktime_get_boottime_ns();
|
2016-03-10 02:05:49 +08:00
|
|
|
case CLOCK_TAI:
|
2019-06-22 04:32:48 +08:00
|
|
|
return ktime_get_clocktai_ns();
|
2016-03-10 02:05:49 +08:00
|
|
|
default:
|
|
|
|
BUG();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(iio_get_time_ns);
|
|
|
|
|
2009-08-19 01:06:19 +08:00
|
|
|
static int __init iio_init(void)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
2010-05-04 21:43:00 +08:00
|
|
|
/* Register sysfs bus */
|
|
|
|
ret = bus_register(&iio_bus_type);
|
2009-08-19 01:06:19 +08:00
|
|
|
if (ret < 0) {
|
2013-10-24 19:53:00 +08:00
|
|
|
pr_err("could not register bus type\n");
|
2009-08-19 01:06:19 +08:00
|
|
|
goto error_nothing;
|
|
|
|
}
|
|
|
|
|
2011-08-13 00:08:50 +08:00
|
|
|
ret = alloc_chrdev_region(&iio_devt, 0, IIO_DEV_MAX, "iio");
|
|
|
|
if (ret < 0) {
|
2013-10-24 19:53:00 +08:00
|
|
|
pr_err("failed to allocate char dev region\n");
|
2010-05-04 21:43:00 +08:00
|
|
|
goto error_unregister_bus_type;
|
2011-08-13 00:08:50 +08:00
|
|
|
}
|
2009-08-19 01:06:19 +08:00
|
|
|
|
2012-03-01 17:51:03 +08:00
|
|
|
iio_debugfs_dentry = debugfs_create_dir("iio", NULL);
|
|
|
|
|
2009-08-19 01:06:19 +08:00
|
|
|
return 0;
|
|
|
|
|
2010-05-04 21:43:00 +08:00
|
|
|
error_unregister_bus_type:
|
|
|
|
bus_unregister(&iio_bus_type);
|
2009-08-19 01:06:19 +08:00
|
|
|
error_nothing:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit iio_exit(void)
|
|
|
|
{
|
2011-08-13 00:08:50 +08:00
|
|
|
if (iio_devt)
|
|
|
|
unregister_chrdev_region(iio_devt, IIO_DEV_MAX);
|
2010-05-04 21:43:00 +08:00
|
|
|
bus_unregister(&iio_bus_type);
|
2012-03-01 17:51:03 +08:00
|
|
|
debugfs_remove(iio_debugfs_dentry);
|
|
|
|
}
|
|
|
|
|
|
|
|
#if defined(CONFIG_DEBUG_FS)
|
|
|
|
static ssize_t iio_debugfs_read_reg(struct file *file, char __user *userbuf,
|
|
|
|
size_t count, loff_t *ppos)
|
|
|
|
{
|
|
|
|
struct iio_dev *indio_dev = file->private_data;
|
2020-06-30 12:57:05 +08:00
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
2022-06-24 10:18:06 +08:00
|
|
|
unsigned int val = 0;
|
2012-03-01 17:51:03 +08:00
|
|
|
int ret;
|
|
|
|
|
2020-02-21 20:06:55 +08:00
|
|
|
if (*ppos > 0)
|
|
|
|
return simple_read_from_buffer(userbuf, count, ppos,
|
2020-06-30 12:57:05 +08:00
|
|
|
iio_dev_opaque->read_buf,
|
|
|
|
iio_dev_opaque->read_buf_len);
|
2020-02-21 20:06:55 +08:00
|
|
|
|
2012-03-01 17:51:03 +08:00
|
|
|
ret = indio_dev->info->debugfs_reg_access(indio_dev,
|
2020-06-30 12:57:05 +08:00
|
|
|
iio_dev_opaque->cached_reg_addr,
|
2012-03-01 17:51:03 +08:00
|
|
|
0, &val);
|
2017-09-05 22:34:10 +08:00
|
|
|
if (ret) {
|
2012-03-01 17:51:03 +08:00
|
|
|
dev_err(indio_dev->dev.parent, "%s: read failed\n", __func__);
|
2017-09-05 22:34:10 +08:00
|
|
|
return ret;
|
|
|
|
}
|
2012-03-01 17:51:03 +08:00
|
|
|
|
2020-06-30 12:57:05 +08:00
|
|
|
iio_dev_opaque->read_buf_len = snprintf(iio_dev_opaque->read_buf,
|
|
|
|
sizeof(iio_dev_opaque->read_buf),
|
|
|
|
"0x%X\n", val);
|
2012-03-01 17:51:03 +08:00
|
|
|
|
2020-02-21 20:06:55 +08:00
|
|
|
return simple_read_from_buffer(userbuf, count, ppos,
|
2020-06-30 12:57:05 +08:00
|
|
|
iio_dev_opaque->read_buf,
|
|
|
|
iio_dev_opaque->read_buf_len);
|
2012-03-01 17:51:03 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t iio_debugfs_write_reg(struct file *file,
|
|
|
|
const char __user *userbuf, size_t count, loff_t *ppos)
|
|
|
|
{
|
|
|
|
struct iio_dev *indio_dev = file->private_data;
|
2020-06-30 12:57:05 +08:00
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
2022-06-24 10:18:06 +08:00
|
|
|
unsigned int reg, val;
|
2012-03-01 17:51:03 +08:00
|
|
|
char buf[80];
|
|
|
|
int ret;
|
|
|
|
|
2023-07-22 01:00:18 +08:00
|
|
|
count = min(count, sizeof(buf) - 1);
|
2012-03-01 17:51:03 +08:00
|
|
|
if (copy_from_user(buf, userbuf, count))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
buf[count] = 0;
|
|
|
|
|
|
|
|
ret = sscanf(buf, "%i %i", ®, &val);
|
|
|
|
|
|
|
|
switch (ret) {
|
|
|
|
case 1:
|
2020-06-30 12:57:05 +08:00
|
|
|
iio_dev_opaque->cached_reg_addr = reg;
|
2012-03-01 17:51:03 +08:00
|
|
|
break;
|
|
|
|
case 2:
|
2020-06-30 12:57:05 +08:00
|
|
|
iio_dev_opaque->cached_reg_addr = reg;
|
2012-03-01 17:51:03 +08:00
|
|
|
ret = indio_dev->info->debugfs_reg_access(indio_dev, reg,
|
|
|
|
val, NULL);
|
|
|
|
if (ret) {
|
|
|
|
dev_err(indio_dev->dev.parent, "%s: write failed\n",
|
|
|
|
__func__);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct file_operations iio_debugfs_reg_fops = {
|
2012-05-03 09:50:51 +08:00
|
|
|
.open = simple_open,
|
2012-03-01 17:51:03 +08:00
|
|
|
.read = iio_debugfs_read_reg,
|
|
|
|
.write = iio_debugfs_write_reg,
|
|
|
|
};
|
|
|
|
|
|
|
|
static void iio_device_unregister_debugfs(struct iio_dev *indio_dev)
|
|
|
|
{
|
2020-06-30 12:57:05 +08:00
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
2022-07-28 02:18:54 +08:00
|
|
|
|
2020-06-30 12:57:05 +08:00
|
|
|
debugfs_remove_recursive(iio_dev_opaque->debugfs_dentry);
|
2009-08-19 01:06:19 +08:00
|
|
|
}
|
|
|
|
|
2019-06-18 23:54:40 +08:00
|
|
|
static void iio_device_register_debugfs(struct iio_dev *indio_dev)
|
2012-03-01 17:51:03 +08:00
|
|
|
{
|
2020-06-30 12:57:05 +08:00
|
|
|
struct iio_dev_opaque *iio_dev_opaque;
|
|
|
|
|
2012-03-01 17:51:03 +08:00
|
|
|
if (indio_dev->info->debugfs_reg_access == NULL)
|
2019-06-18 23:54:40 +08:00
|
|
|
return;
|
2012-03-01 17:51:03 +08:00
|
|
|
|
2012-05-03 22:56:58 +08:00
|
|
|
if (!iio_debugfs_dentry)
|
2019-06-18 23:54:40 +08:00
|
|
|
return;
|
2012-03-01 17:51:03 +08:00
|
|
|
|
2020-06-30 12:57:05 +08:00
|
|
|
iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
|
|
|
|
|
|
|
iio_dev_opaque->debugfs_dentry =
|
2012-03-01 17:51:03 +08:00
|
|
|
debugfs_create_dir(dev_name(&indio_dev->dev),
|
|
|
|
iio_debugfs_dentry);
|
|
|
|
|
2019-06-18 23:54:40 +08:00
|
|
|
debugfs_create_file("direct_reg_access", 0644,
|
2020-06-30 12:57:05 +08:00
|
|
|
iio_dev_opaque->debugfs_dentry, indio_dev,
|
2019-06-18 23:54:40 +08:00
|
|
|
&iio_debugfs_reg_fops);
|
2012-03-01 17:51:03 +08:00
|
|
|
}
|
|
|
|
#else
|
2019-06-18 23:54:40 +08:00
|
|
|
static void iio_device_register_debugfs(struct iio_dev *indio_dev)
|
2012-03-01 17:51:03 +08:00
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
static void iio_device_unregister_debugfs(struct iio_dev *indio_dev)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
#endif /* CONFIG_DEBUG_FS */
|
|
|
|
|
2012-03-07 03:43:45 +08:00
|
|
|
static ssize_t iio_read_channel_ext_info(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
char *buf)
|
|
|
|
{
|
2012-05-12 21:39:33 +08:00
|
|
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
|
2012-03-07 03:43:45 +08:00
|
|
|
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
|
|
|
|
const struct iio_chan_spec_ext_info *ext_info;
|
|
|
|
|
|
|
|
ext_info = &this_attr->c->ext_info[this_attr->address];
|
|
|
|
|
2012-04-27 16:58:36 +08:00
|
|
|
return ext_info->read(indio_dev, ext_info->private, this_attr->c, buf);
|
2012-03-07 03:43:45 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t iio_write_channel_ext_info(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf,
|
|
|
|
size_t len)
|
|
|
|
{
|
2012-05-12 21:39:33 +08:00
|
|
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
|
2012-03-07 03:43:45 +08:00
|
|
|
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
|
|
|
|
const struct iio_chan_spec_ext_info *ext_info;
|
|
|
|
|
|
|
|
ext_info = &this_attr->c->ext_info[this_attr->address];
|
|
|
|
|
2012-04-27 16:58:36 +08:00
|
|
|
return ext_info->write(indio_dev, ext_info->private,
|
|
|
|
this_attr->c, buf, len);
|
2012-03-07 03:43:45 +08:00
|
|
|
}
|
|
|
|
|
2012-06-04 17:36:11 +08:00
|
|
|
ssize_t iio_enum_available_read(struct iio_dev *indio_dev,
|
|
|
|
uintptr_t priv, const struct iio_chan_spec *chan, char *buf)
|
|
|
|
{
|
|
|
|
const struct iio_enum *e = (const struct iio_enum *)priv;
|
|
|
|
unsigned int i;
|
|
|
|
size_t len = 0;
|
|
|
|
|
|
|
|
if (!e->num_items)
|
|
|
|
return 0;
|
|
|
|
|
2021-01-07 19:20:49 +08:00
|
|
|
for (i = 0; i < e->num_items; ++i) {
|
|
|
|
if (!e->items[i])
|
|
|
|
continue;
|
2021-03-20 15:14:03 +08:00
|
|
|
len += sysfs_emit_at(buf, len, "%s ", e->items[i]);
|
2021-01-07 19:20:49 +08:00
|
|
|
}
|
2012-06-04 17:36:11 +08:00
|
|
|
|
|
|
|
/* replace last space with a newline */
|
|
|
|
buf[len - 1] = '\n';
|
|
|
|
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(iio_enum_available_read);
|
|
|
|
|
|
|
|
ssize_t iio_enum_read(struct iio_dev *indio_dev,
|
|
|
|
uintptr_t priv, const struct iio_chan_spec *chan, char *buf)
|
|
|
|
{
|
|
|
|
const struct iio_enum *e = (const struct iio_enum *)priv;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if (!e->get)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
i = e->get(indio_dev, chan);
|
|
|
|
if (i < 0)
|
|
|
|
return i;
|
2021-01-07 19:20:49 +08:00
|
|
|
else if (i >= e->num_items || !e->items[i])
|
2012-06-04 17:36:11 +08:00
|
|
|
return -EINVAL;
|
|
|
|
|
2021-03-20 15:14:02 +08:00
|
|
|
return sysfs_emit(buf, "%s\n", e->items[i]);
|
2012-06-04 17:36:11 +08:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(iio_enum_read);
|
|
|
|
|
|
|
|
ssize_t iio_enum_write(struct iio_dev *indio_dev,
|
|
|
|
uintptr_t priv, const struct iio_chan_spec *chan, const char *buf,
|
|
|
|
size_t len)
|
|
|
|
{
|
|
|
|
const struct iio_enum *e = (const struct iio_enum *)priv;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (!e->set)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2023-01-18 15:48:27 +08:00
|
|
|
ret = __sysfs_match_string(e->items, e->num_items, buf);
|
2017-06-09 20:08:16 +08:00
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
2012-06-04 17:36:11 +08:00
|
|
|
|
2017-06-09 20:08:16 +08:00
|
|
|
ret = e->set(indio_dev, chan, ret);
|
2012-06-04 17:36:11 +08:00
|
|
|
return ret ? ret : len;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(iio_enum_write);
|
|
|
|
|
2016-04-21 01:23:43 +08:00
|
|
|
static const struct iio_mount_matrix iio_mount_idmatrix = {
|
|
|
|
.rotation = {
|
|
|
|
"1", "0", "0",
|
|
|
|
"0", "1", "0",
|
|
|
|
"0", "0", "1"
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
static int iio_setup_mount_idmatrix(const struct device *dev,
|
|
|
|
struct iio_mount_matrix *matrix)
|
|
|
|
{
|
|
|
|
*matrix = iio_mount_idmatrix;
|
|
|
|
dev_info(dev, "mounting matrix not found: using identity...\n");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
ssize_t iio_show_mount_matrix(struct iio_dev *indio_dev, uintptr_t priv,
|
|
|
|
const struct iio_chan_spec *chan, char *buf)
|
|
|
|
{
|
|
|
|
const struct iio_mount_matrix *mtx = ((iio_get_mount_matrix_t *)
|
|
|
|
priv)(indio_dev, chan);
|
|
|
|
|
|
|
|
if (IS_ERR(mtx))
|
|
|
|
return PTR_ERR(mtx);
|
|
|
|
|
|
|
|
if (!mtx)
|
|
|
|
mtx = &iio_mount_idmatrix;
|
|
|
|
|
2021-03-20 15:14:02 +08:00
|
|
|
return sysfs_emit(buf, "%s, %s, %s; %s, %s, %s; %s, %s, %s\n",
|
|
|
|
mtx->rotation[0], mtx->rotation[1], mtx->rotation[2],
|
|
|
|
mtx->rotation[3], mtx->rotation[4], mtx->rotation[5],
|
|
|
|
mtx->rotation[6], mtx->rotation[7], mtx->rotation[8]);
|
2016-04-21 01:23:43 +08:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(iio_show_mount_matrix);
|
|
|
|
|
|
|
|
/**
|
iio: Allow to read mount matrix from ACPI
Currently mount matrix is allowed in Device Tree, though there is
no technical issue to extend it to support ACPI.
Convert the function to use device_property_read_string_array() and
thus allow to read mount matrix from ACPI if available.
Example of use in _DSD method:
Name (_DSD, Package ()
{
ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
Package ()
{
Package () { "mount-matrix", Package() {
"1", "0", "0",
"0", "0.866", "0.5",
"0", "-0.5", "0.866",
} },
}
})
At the same time drop the "of" prefix from its name and
convert current users.
No functional change intended.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-02-22 01:02:46 +08:00
|
|
|
* iio_read_mount_matrix() - retrieve iio device mounting matrix from
|
|
|
|
* device "mount-matrix" property
|
2016-04-21 01:23:43 +08:00
|
|
|
* @dev: device the mounting matrix property is assigned to
|
|
|
|
* @matrix: where to store retrieved matrix
|
|
|
|
*
|
|
|
|
* If device is assigned no mounting matrix property, a default 3x3 identity
|
|
|
|
* matrix will be filled in.
|
|
|
|
*
|
|
|
|
* Return: 0 if success, or a negative error code on failure.
|
|
|
|
*/
|
2021-05-18 19:25:46 +08:00
|
|
|
int iio_read_mount_matrix(struct device *dev, struct iio_mount_matrix *matrix)
|
2016-04-21 01:23:43 +08:00
|
|
|
{
|
iio: Allow to read mount matrix from ACPI
Currently mount matrix is allowed in Device Tree, though there is
no technical issue to extend it to support ACPI.
Convert the function to use device_property_read_string_array() and
thus allow to read mount matrix from ACPI if available.
Example of use in _DSD method:
Name (_DSD, Package ()
{
ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
Package ()
{
Package () { "mount-matrix", Package() {
"1", "0", "0",
"0", "0.866", "0.5",
"0", "-0.5", "0.866",
} },
}
})
At the same time drop the "of" prefix from its name and
convert current users.
No functional change intended.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-02-22 01:02:46 +08:00
|
|
|
size_t len = ARRAY_SIZE(iio_mount_idmatrix.rotation);
|
|
|
|
int err;
|
2016-04-21 01:23:43 +08:00
|
|
|
|
2021-05-18 19:25:46 +08:00
|
|
|
err = device_property_read_string_array(dev, "mount-matrix", matrix->rotation, len);
|
iio: Allow to read mount matrix from ACPI
Currently mount matrix is allowed in Device Tree, though there is
no technical issue to extend it to support ACPI.
Convert the function to use device_property_read_string_array() and
thus allow to read mount matrix from ACPI if available.
Example of use in _DSD method:
Name (_DSD, Package ()
{
ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
Package ()
{
Package () { "mount-matrix", Package() {
"1", "0", "0",
"0", "0.866", "0.5",
"0", "-0.5", "0.866",
} },
}
})
At the same time drop the "of" prefix from its name and
convert current users.
No functional change intended.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-02-22 01:02:46 +08:00
|
|
|
if (err == len)
|
|
|
|
return 0;
|
2016-04-21 01:23:43 +08:00
|
|
|
|
iio: Allow to read mount matrix from ACPI
Currently mount matrix is allowed in Device Tree, though there is
no technical issue to extend it to support ACPI.
Convert the function to use device_property_read_string_array() and
thus allow to read mount matrix from ACPI if available.
Example of use in _DSD method:
Name (_DSD, Package ()
{
ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
Package ()
{
Package () { "mount-matrix", Package() {
"1", "0", "0",
"0", "0.866", "0.5",
"0", "-0.5", "0.866",
} },
}
})
At the same time drop the "of" prefix from its name and
convert current users.
No functional change intended.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-02-22 01:02:46 +08:00
|
|
|
if (err >= 0)
|
|
|
|
/* Invalid number of matrix entries. */
|
|
|
|
return -EINVAL;
|
2016-04-21 01:23:43 +08:00
|
|
|
|
iio: Allow to read mount matrix from ACPI
Currently mount matrix is allowed in Device Tree, though there is
no technical issue to extend it to support ACPI.
Convert the function to use device_property_read_string_array() and
thus allow to read mount matrix from ACPI if available.
Example of use in _DSD method:
Name (_DSD, Package ()
{
ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
Package ()
{
Package () { "mount-matrix", Package() {
"1", "0", "0",
"0", "0.866", "0.5",
"0", "-0.5", "0.866",
} },
}
})
At the same time drop the "of" prefix from its name and
convert current users.
No functional change intended.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-02-22 01:02:46 +08:00
|
|
|
if (err != -EINVAL)
|
|
|
|
/* Invalid matrix declaration format. */
|
|
|
|
return err;
|
2016-04-21 01:23:43 +08:00
|
|
|
|
|
|
|
/* Matrix was not declared at all: fallback to identity. */
|
|
|
|
return iio_setup_mount_idmatrix(dev, matrix);
|
|
|
|
}
|
iio: Allow to read mount matrix from ACPI
Currently mount matrix is allowed in Device Tree, though there is
no technical issue to extend it to support ACPI.
Convert the function to use device_property_read_string_array() and
thus allow to read mount matrix from ACPI if available.
Example of use in _DSD method:
Name (_DSD, Package ()
{
ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
Package ()
{
Package () { "mount-matrix", Package() {
"1", "0", "0",
"0", "0.866", "0.5",
"0", "-0.5", "0.866",
} },
}
})
At the same time drop the "of" prefix from its name and
convert current users.
No functional change intended.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-02-22 01:02:46 +08:00
|
|
|
EXPORT_SYMBOL(iio_read_mount_matrix);
|
2016-04-21 01:23:43 +08:00
|
|
|
|
2021-03-20 15:14:04 +08:00
|
|
|
static ssize_t __iio_format_value(char *buf, size_t offset, unsigned int type,
|
2016-11-08 19:58:51 +08:00
|
|
|
int size, const int *vals)
|
2009-08-19 01:06:19 +08:00
|
|
|
{
|
2016-11-08 19:58:51 +08:00
|
|
|
int tmp0, tmp1;
|
2020-10-05 23:05:16 +08:00
|
|
|
s64 tmp2;
|
2012-05-11 17:36:52 +08:00
|
|
|
bool scale_db = false;
|
2011-05-18 21:40:51 +08:00
|
|
|
|
2013-10-07 22:11:00 +08:00
|
|
|
switch (type) {
|
2012-05-11 17:36:52 +08:00
|
|
|
case IIO_VAL_INT:
|
2021-03-20 15:14:04 +08:00
|
|
|
return sysfs_emit_at(buf, offset, "%d", vals[0]);
|
2012-05-11 17:36:52 +08:00
|
|
|
case IIO_VAL_INT_PLUS_MICRO_DB:
|
|
|
|
scale_db = true;
|
2020-08-24 06:36:59 +08:00
|
|
|
fallthrough;
|
2012-05-11 17:36:52 +08:00
|
|
|
case IIO_VAL_INT_PLUS_MICRO:
|
2014-04-29 07:51:00 +08:00
|
|
|
if (vals[1] < 0)
|
2021-03-20 15:14:04 +08:00
|
|
|
return sysfs_emit_at(buf, offset, "-%d.%06u%s",
|
|
|
|
abs(vals[0]), -vals[1],
|
|
|
|
scale_db ? " dB" : "");
|
2011-05-18 21:40:51 +08:00
|
|
|
else
|
2021-03-20 15:14:04 +08:00
|
|
|
return sysfs_emit_at(buf, offset, "%d.%06u%s", vals[0],
|
|
|
|
vals[1], scale_db ? " dB" : "");
|
2012-05-11 17:36:52 +08:00
|
|
|
case IIO_VAL_INT_PLUS_NANO:
|
2014-04-29 07:51:00 +08:00
|
|
|
if (vals[1] < 0)
|
2021-03-20 15:14:04 +08:00
|
|
|
return sysfs_emit_at(buf, offset, "-%d.%09u",
|
|
|
|
abs(vals[0]), -vals[1]);
|
2011-06-27 20:07:07 +08:00
|
|
|
else
|
2021-03-20 15:14:04 +08:00
|
|
|
return sysfs_emit_at(buf, offset, "%d.%09u", vals[0],
|
|
|
|
vals[1]);
|
2012-09-14 23:21:00 +08:00
|
|
|
case IIO_VAL_FRACTIONAL:
|
2020-10-05 23:05:16 +08:00
|
|
|
tmp2 = div_s64((s64)vals[0] * 1000000000LL, vals[1]);
|
2016-11-08 19:58:51 +08:00
|
|
|
tmp1 = vals[1];
|
2020-10-05 23:05:16 +08:00
|
|
|
tmp0 = (int)div_s64_rem(tmp2, 1000000000, &tmp1);
|
|
|
|
if ((tmp2 < 0) && (tmp0 == 0))
|
2021-03-20 15:14:04 +08:00
|
|
|
return sysfs_emit_at(buf, offset, "-0.%09u", abs(tmp1));
|
2020-10-05 23:05:16 +08:00
|
|
|
else
|
2021-03-20 15:14:04 +08:00
|
|
|
return sysfs_emit_at(buf, offset, "%d.%09u", tmp0,
|
|
|
|
abs(tmp1));
|
2012-10-17 00:29:00 +08:00
|
|
|
case IIO_VAL_FRACTIONAL_LOG2:
|
2020-12-16 03:17:41 +08:00
|
|
|
tmp2 = shift_right((s64)vals[0] * 1000000000LL, vals[1]);
|
|
|
|
tmp0 = (int)div_s64_rem(tmp2, 1000000000LL, &tmp1);
|
2020-12-16 03:17:42 +08:00
|
|
|
if (tmp0 == 0 && tmp2 < 0)
|
2021-03-20 15:14:04 +08:00
|
|
|
return sysfs_emit_at(buf, offset, "-0.%09u", abs(tmp1));
|
2020-12-16 03:17:42 +08:00
|
|
|
else
|
2021-03-20 15:14:04 +08:00
|
|
|
return sysfs_emit_at(buf, offset, "%d.%09u", tmp0,
|
|
|
|
abs(tmp1));
|
2014-04-29 07:51:00 +08:00
|
|
|
case IIO_VAL_INT_MULTIPLE:
|
|
|
|
{
|
|
|
|
int i;
|
2016-11-08 19:58:51 +08:00
|
|
|
int l = 0;
|
2014-04-29 07:51:00 +08:00
|
|
|
|
2021-03-20 15:14:04 +08:00
|
|
|
for (i = 0; i < size; ++i)
|
|
|
|
l += sysfs_emit_at(buf, offset + l, "%d ", vals[i]);
|
2016-11-08 19:58:51 +08:00
|
|
|
return l;
|
2014-04-29 07:51:00 +08:00
|
|
|
}
|
2019-11-20 22:47:51 +08:00
|
|
|
case IIO_VAL_CHAR:
|
2021-03-20 15:14:04 +08:00
|
|
|
return sysfs_emit_at(buf, offset, "%c", (char)vals[0]);
|
2021-10-24 17:16:26 +08:00
|
|
|
case IIO_VAL_INT_64:
|
|
|
|
tmp2 = (s64)((((u64)vals[1]) << 32) | (u32)vals[0]);
|
|
|
|
return sysfs_emit_at(buf, offset, "%lld", tmp2);
|
2012-05-11 17:36:52 +08:00
|
|
|
default:
|
2011-05-18 21:40:51 +08:00
|
|
|
return 0;
|
2012-05-11 17:36:52 +08:00
|
|
|
}
|
2011-05-18 21:40:51 +08:00
|
|
|
}
|
2016-11-08 19:58:51 +08:00
|
|
|
|
|
|
|
/**
|
|
|
|
* iio_format_value() - Formats a IIO value into its string representation
|
|
|
|
* @buf: The buffer to which the formatted value gets written
|
|
|
|
* which is assumed to be big enough (i.e. PAGE_SIZE).
|
2017-10-30 08:06:01 +08:00
|
|
|
* @type: One of the IIO_VAL_* constants. This decides how the val
|
2016-11-08 19:58:51 +08:00
|
|
|
* and val2 parameters are formatted.
|
|
|
|
* @size: Number of IIO value entries contained in vals
|
|
|
|
* @vals: Pointer to the values, exact meaning depends on the
|
|
|
|
* type parameter.
|
|
|
|
*
|
|
|
|
* Return: 0 by default, a negative number on failure or the
|
|
|
|
* total number of characters written for a type that belongs
|
2017-10-30 08:06:01 +08:00
|
|
|
* to the IIO_VAL_* constant.
|
2016-11-08 19:58:51 +08:00
|
|
|
*/
|
|
|
|
ssize_t iio_format_value(char *buf, unsigned int type, int size, int *vals)
|
|
|
|
{
|
|
|
|
ssize_t len;
|
|
|
|
|
2021-03-20 15:14:04 +08:00
|
|
|
len = __iio_format_value(buf, 0, type, size, vals);
|
2016-11-08 19:58:51 +08:00
|
|
|
if (len >= PAGE_SIZE - 1)
|
|
|
|
return -EFBIG;
|
|
|
|
|
2021-03-20 15:14:04 +08:00
|
|
|
return len + sysfs_emit_at(buf, len, "\n");
|
2016-11-08 19:58:51 +08:00
|
|
|
}
|
2015-12-15 06:35:57 +08:00
|
|
|
EXPORT_SYMBOL_GPL(iio_format_value);
|
2011-05-18 21:40:51 +08:00
|
|
|
|
2020-09-28 17:09:55 +08:00
|
|
|
static ssize_t iio_read_channel_label(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
char *buf)
|
|
|
|
{
|
|
|
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
|
|
|
|
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
|
|
|
|
|
iio: core: Support reading extended name as label
The point of this new change is to make the IIO tree actually parsable.
Before, given this attribute as a filename:
in_voltage0_aux_sample_rate
Userspace had no way to know if the attribute name was
"aux_sample_rate" with no extended name, or "sample_rate" with "aux" as
the extended name, or just "rate" with "aux_sample" as the extended
name.
This was somewhat possible to deduce when there was more than one
attribute present for a given channel, e.g:
in_voltage0_aux_sample_rate
in_voltage0_aux_frequency
There, it was possible to deduce that "aux" was the extended name. But
even with more than one attribute, this wasn't very robust, as two
attributes starting with the same prefix (e.g. "sample_rate" and
"sample_size") would result in the first part of the prefix being
interpreted as being part of the extended name.
To address the issue, knowing that channels will never have both a label
and an extended name, set the channel's label to the extended name.
In this case, the label's attribute will also have the extended name in
its filename, but we can live with that - userspace can open
in_voltage0_<prefix>_label and verify that it returns <prefix> to obtain
the extended name.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20210618123005.49867-3-paul@crapouillou.net
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-06-18 20:30:05 +08:00
|
|
|
if (indio_dev->info->read_label)
|
|
|
|
return indio_dev->info->read_label(indio_dev, this_attr->c, buf);
|
|
|
|
|
|
|
|
if (this_attr->c->extend_name)
|
2021-12-17 02:52:05 +08:00
|
|
|
return sysfs_emit(buf, "%s\n", this_attr->c->extend_name);
|
2020-09-28 17:09:55 +08:00
|
|
|
|
iio: core: Support reading extended name as label
The point of this new change is to make the IIO tree actually parsable.
Before, given this attribute as a filename:
in_voltage0_aux_sample_rate
Userspace had no way to know if the attribute name was
"aux_sample_rate" with no extended name, or "sample_rate" with "aux" as
the extended name, or just "rate" with "aux_sample" as the extended
name.
This was somewhat possible to deduce when there was more than one
attribute present for a given channel, e.g:
in_voltage0_aux_sample_rate
in_voltage0_aux_frequency
There, it was possible to deduce that "aux" was the extended name. But
even with more than one attribute, this wasn't very robust, as two
attributes starting with the same prefix (e.g. "sample_rate" and
"sample_size") would result in the first part of the prefix being
interpreted as being part of the extended name.
To address the issue, knowing that channels will never have both a label
and an extended name, set the channel's label to the extended name.
In this case, the label's attribute will also have the extended name in
its filename, but we can live with that - userspace can open
in_voltage0_<prefix>_label and verify that it returns <prefix> to obtain
the extended name.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20210618123005.49867-3-paul@crapouillou.net
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-06-18 20:30:05 +08:00
|
|
|
return -EINVAL;
|
2020-09-28 17:09:55 +08:00
|
|
|
}
|
|
|
|
|
2013-10-07 22:11:00 +08:00
|
|
|
static ssize_t iio_read_channel_info(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
char *buf)
|
|
|
|
{
|
|
|
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
|
|
|
|
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
|
2014-04-29 07:51:00 +08:00
|
|
|
int vals[INDIO_MAX_RAW_ELEMENTS];
|
|
|
|
int ret;
|
|
|
|
int val_len = 2;
|
|
|
|
|
|
|
|
if (indio_dev->info->read_raw_multi)
|
|
|
|
ret = indio_dev->info->read_raw_multi(indio_dev, this_attr->c,
|
|
|
|
INDIO_MAX_RAW_ELEMENTS,
|
|
|
|
vals, &val_len,
|
|
|
|
this_attr->address);
|
|
|
|
else
|
|
|
|
ret = indio_dev->info->read_raw(indio_dev, this_attr->c,
|
|
|
|
&vals[0], &vals[1], this_attr->address);
|
2013-10-07 22:11:00 +08:00
|
|
|
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
2014-04-29 07:51:00 +08:00
|
|
|
return iio_format_value(buf, ret, val_len, vals);
|
2013-10-07 22:11:00 +08:00
|
|
|
}
|
|
|
|
|
2020-11-14 19:59:59 +08:00
|
|
|
static ssize_t iio_format_list(char *buf, const int *vals, int type, int length,
|
|
|
|
const char *prefix, const char *suffix)
|
2016-11-08 19:58:51 +08:00
|
|
|
{
|
2020-11-14 19:59:59 +08:00
|
|
|
ssize_t len;
|
2020-11-14 20:00:00 +08:00
|
|
|
int stride;
|
2016-11-08 19:58:51 +08:00
|
|
|
int i;
|
2020-11-14 19:59:59 +08:00
|
|
|
|
2016-11-08 19:58:51 +08:00
|
|
|
switch (type) {
|
|
|
|
case IIO_VAL_INT:
|
2020-11-14 20:00:00 +08:00
|
|
|
stride = 1;
|
2016-11-08 19:58:51 +08:00
|
|
|
break;
|
|
|
|
default:
|
2020-11-14 20:00:00 +08:00
|
|
|
stride = 2;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2021-03-20 15:14:04 +08:00
|
|
|
len = sysfs_emit(buf, prefix);
|
2020-11-14 20:00:00 +08:00
|
|
|
|
|
|
|
for (i = 0; i <= length - stride; i += stride) {
|
|
|
|
if (i != 0) {
|
2021-03-20 15:14:04 +08:00
|
|
|
len += sysfs_emit_at(buf, len, " ");
|
2016-11-08 19:58:51 +08:00
|
|
|
if (len >= PAGE_SIZE)
|
|
|
|
return -EFBIG;
|
|
|
|
}
|
2020-11-14 20:00:00 +08:00
|
|
|
|
2021-03-20 15:14:04 +08:00
|
|
|
len += __iio_format_value(buf, len, type, stride, &vals[i]);
|
2020-11-14 20:00:00 +08:00
|
|
|
if (len >= PAGE_SIZE)
|
|
|
|
return -EFBIG;
|
2016-11-08 19:58:51 +08:00
|
|
|
}
|
|
|
|
|
2021-03-20 15:14:04 +08:00
|
|
|
len += sysfs_emit_at(buf, len, "%s\n", suffix);
|
2020-11-14 20:00:00 +08:00
|
|
|
|
2016-11-08 19:58:51 +08:00
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
2020-11-14 19:59:59 +08:00
|
|
|
static ssize_t iio_format_avail_list(char *buf, const int *vals,
|
|
|
|
int type, int length)
|
2016-11-08 19:58:51 +08:00
|
|
|
{
|
|
|
|
|
2020-11-14 19:59:59 +08:00
|
|
|
return iio_format_list(buf, vals, type, length, "", "");
|
|
|
|
}
|
2016-11-08 19:58:51 +08:00
|
|
|
|
2020-11-14 19:59:59 +08:00
|
|
|
static ssize_t iio_format_avail_range(char *buf, const int *vals, int type)
|
|
|
|
{
|
2022-07-18 21:07:06 +08:00
|
|
|
int length;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* length refers to the array size , not the number of elements.
|
|
|
|
* The purpose is to print the range [min , step ,max] so length should
|
|
|
|
* be 3 in case of int, and 6 for other types.
|
|
|
|
*/
|
|
|
|
switch (type) {
|
|
|
|
case IIO_VAL_INT:
|
|
|
|
length = 3;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
length = 6;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return iio_format_list(buf, vals, type, length, "[", "]");
|
2016-11-08 19:58:51 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t iio_read_channel_info_avail(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
char *buf)
|
|
|
|
{
|
|
|
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
|
|
|
|
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
|
|
|
|
const int *vals;
|
|
|
|
int ret;
|
|
|
|
int length;
|
|
|
|
int type;
|
|
|
|
|
|
|
|
ret = indio_dev->info->read_avail(indio_dev, this_attr->c,
|
|
|
|
&vals, &type, &length,
|
|
|
|
this_attr->address);
|
|
|
|
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
switch (ret) {
|
|
|
|
case IIO_AVAIL_LIST:
|
|
|
|
return iio_format_avail_list(buf, vals, type, length);
|
|
|
|
case IIO_AVAIL_RANGE:
|
|
|
|
return iio_format_avail_range(buf, vals, type);
|
|
|
|
default:
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-11-20 21:36:00 +08:00
|
|
|
/**
|
2020-02-06 23:11:45 +08:00
|
|
|
* __iio_str_to_fixpoint() - Parse a fixed-point number from a string
|
2012-11-20 21:36:00 +08:00
|
|
|
* @str: The string to parse
|
|
|
|
* @fract_mult: Multiplier for the first decimal place, should be a power of 10
|
|
|
|
* @integer: The integer part of the number
|
|
|
|
* @fract: The fractional part of the number
|
2020-02-06 23:11:45 +08:00
|
|
|
* @scale_db: True if this should parse as dB
|
2012-11-20 21:36:00 +08:00
|
|
|
*
|
|
|
|
* Returns 0 on success, or a negative error code if the string could not be
|
|
|
|
* parsed.
|
|
|
|
*/
|
2020-02-06 23:11:45 +08:00
|
|
|
static int __iio_str_to_fixpoint(const char *str, int fract_mult,
|
|
|
|
int *integer, int *fract, bool scale_db)
|
2012-11-20 21:36:00 +08:00
|
|
|
{
|
|
|
|
int i = 0, f = 0;
|
|
|
|
bool integer_part = true, negative = false;
|
|
|
|
|
2015-11-09 20:55:34 +08:00
|
|
|
if (fract_mult == 0) {
|
|
|
|
*fract = 0;
|
|
|
|
|
|
|
|
return kstrtoint(str, 0, integer);
|
|
|
|
}
|
|
|
|
|
2012-11-20 21:36:00 +08:00
|
|
|
if (str[0] == '-') {
|
|
|
|
negative = true;
|
|
|
|
str++;
|
|
|
|
} else if (str[0] == '+') {
|
|
|
|
str++;
|
|
|
|
}
|
|
|
|
|
|
|
|
while (*str) {
|
|
|
|
if ('0' <= *str && *str <= '9') {
|
|
|
|
if (integer_part) {
|
|
|
|
i = i * 10 + *str - '0';
|
|
|
|
} else {
|
|
|
|
f += fract_mult * (*str - '0');
|
|
|
|
fract_mult /= 10;
|
|
|
|
}
|
|
|
|
} else if (*str == '\n') {
|
|
|
|
if (*(str + 1) == '\0')
|
|
|
|
break;
|
2022-03-13 02:03:43 +08:00
|
|
|
return -EINVAL;
|
2020-02-06 23:11:45 +08:00
|
|
|
} else if (!strncmp(str, " dB", sizeof(" dB") - 1) && scale_db) {
|
|
|
|
/* Ignore the dB suffix */
|
|
|
|
str += sizeof(" dB") - 1;
|
|
|
|
continue;
|
|
|
|
} else if (!strncmp(str, "dB", sizeof("dB") - 1) && scale_db) {
|
|
|
|
/* Ignore the dB suffix */
|
|
|
|
str += sizeof("dB") - 1;
|
|
|
|
continue;
|
2012-11-20 21:36:00 +08:00
|
|
|
} else if (*str == '.' && integer_part) {
|
|
|
|
integer_part = false;
|
|
|
|
} else {
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
str++;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (negative) {
|
|
|
|
if (i)
|
|
|
|
i = -i;
|
|
|
|
else
|
|
|
|
f = -f;
|
|
|
|
}
|
|
|
|
|
|
|
|
*integer = i;
|
|
|
|
*fract = f;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
2020-02-06 23:11:45 +08:00
|
|
|
|
|
|
|
/**
|
|
|
|
* iio_str_to_fixpoint() - Parse a fixed-point number from a string
|
|
|
|
* @str: The string to parse
|
|
|
|
* @fract_mult: Multiplier for the first decimal place, should be a power of 10
|
|
|
|
* @integer: The integer part of the number
|
|
|
|
* @fract: The fractional part of the number
|
|
|
|
*
|
|
|
|
* Returns 0 on success, or a negative error code if the string could not be
|
|
|
|
* parsed.
|
|
|
|
*/
|
|
|
|
int iio_str_to_fixpoint(const char *str, int fract_mult,
|
|
|
|
int *integer, int *fract)
|
|
|
|
{
|
|
|
|
return __iio_str_to_fixpoint(str, fract_mult, integer, fract, false);
|
|
|
|
}
|
2012-11-20 21:36:00 +08:00
|
|
|
EXPORT_SYMBOL_GPL(iio_str_to_fixpoint);
|
|
|
|
|
2011-05-18 21:40:51 +08:00
|
|
|
static ssize_t iio_write_channel_info(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf,
|
|
|
|
size_t len)
|
|
|
|
{
|
2012-05-12 21:39:33 +08:00
|
|
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
|
2011-05-18 21:40:51 +08:00
|
|
|
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
|
2012-11-20 21:36:00 +08:00
|
|
|
int ret, fract_mult = 100000;
|
2019-11-20 22:47:51 +08:00
|
|
|
int integer, fract = 0;
|
|
|
|
bool is_char = false;
|
2020-02-06 23:11:45 +08:00
|
|
|
bool scale_db = false;
|
2011-05-18 21:40:51 +08:00
|
|
|
|
|
|
|
/* Assumes decimal - precision based on number of digits */
|
2011-05-18 21:42:37 +08:00
|
|
|
if (!indio_dev->info->write_raw)
|
2011-05-18 21:40:51 +08:00
|
|
|
return -EINVAL;
|
2011-06-27 20:07:10 +08:00
|
|
|
|
|
|
|
if (indio_dev->info->write_raw_get_fmt)
|
|
|
|
switch (indio_dev->info->write_raw_get_fmt(indio_dev,
|
|
|
|
this_attr->c, this_attr->address)) {
|
2015-11-09 20:55:34 +08:00
|
|
|
case IIO_VAL_INT:
|
|
|
|
fract_mult = 0;
|
|
|
|
break;
|
2020-02-06 23:11:45 +08:00
|
|
|
case IIO_VAL_INT_PLUS_MICRO_DB:
|
|
|
|
scale_db = true;
|
2020-08-24 06:36:59 +08:00
|
|
|
fallthrough;
|
2011-06-27 20:07:10 +08:00
|
|
|
case IIO_VAL_INT_PLUS_MICRO:
|
|
|
|
fract_mult = 100000;
|
|
|
|
break;
|
|
|
|
case IIO_VAL_INT_PLUS_NANO:
|
|
|
|
fract_mult = 100000000;
|
|
|
|
break;
|
2019-11-20 22:47:51 +08:00
|
|
|
case IIO_VAL_CHAR:
|
|
|
|
is_char = true;
|
|
|
|
break;
|
2011-06-27 20:07:10 +08:00
|
|
|
default:
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2019-11-20 22:47:51 +08:00
|
|
|
if (is_char) {
|
|
|
|
char ch;
|
|
|
|
|
|
|
|
if (sscanf(buf, "%c", &ch) != 1)
|
|
|
|
return -EINVAL;
|
|
|
|
integer = ch;
|
|
|
|
} else {
|
2020-04-01 19:22:30 +08:00
|
|
|
ret = __iio_str_to_fixpoint(buf, fract_mult, &integer, &fract,
|
|
|
|
scale_db);
|
2019-11-20 22:47:51 +08:00
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
}
|
2011-05-18 21:40:51 +08:00
|
|
|
|
2011-05-18 21:42:37 +08:00
|
|
|
ret = indio_dev->info->write_raw(indio_dev, this_attr->c,
|
2011-06-27 20:07:10 +08:00
|
|
|
integer, fract, this_attr->address);
|
2011-05-18 21:40:51 +08:00
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
2011-08-13 00:56:03 +08:00
|
|
|
static
|
2011-05-18 21:40:51 +08:00
|
|
|
int __iio_device_attr_init(struct device_attribute *dev_attr,
|
|
|
|
const char *postfix,
|
|
|
|
struct iio_chan_spec const *chan,
|
|
|
|
ssize_t (*readfunc)(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
char *buf),
|
|
|
|
ssize_t (*writefunc)(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf,
|
|
|
|
size_t len),
|
2013-09-08 21:57:00 +08:00
|
|
|
enum iio_shared_by shared_by)
|
2011-05-18 21:40:51 +08:00
|
|
|
{
|
2013-09-08 21:57:00 +08:00
|
|
|
int ret = 0;
|
2014-02-14 22:19:00 +08:00
|
|
|
char *name = NULL;
|
2013-09-08 21:57:00 +08:00
|
|
|
char *full_postfix;
|
2022-07-28 02:18:54 +08:00
|
|
|
|
2011-05-18 21:40:51 +08:00
|
|
|
sysfs_attr_init(&dev_attr->attr);
|
|
|
|
|
2011-09-03 00:14:45 +08:00
|
|
|
/* Build up postfix of <extend_name>_<modifier>_postfix */
|
2013-09-08 21:57:00 +08:00
|
|
|
if (chan->modified && (shared_by == IIO_SEPARATE)) {
|
2011-09-03 00:14:45 +08:00
|
|
|
if (chan->extend_name)
|
|
|
|
full_postfix = kasprintf(GFP_KERNEL, "%s_%s_%s",
|
|
|
|
iio_modifier_names[chan
|
|
|
|
->channel2],
|
|
|
|
chan->extend_name,
|
|
|
|
postfix);
|
|
|
|
else
|
|
|
|
full_postfix = kasprintf(GFP_KERNEL, "%s_%s",
|
|
|
|
iio_modifier_names[chan
|
|
|
|
->channel2],
|
|
|
|
postfix);
|
|
|
|
} else {
|
2014-02-14 22:19:00 +08:00
|
|
|
if (chan->extend_name == NULL || shared_by != IIO_SEPARATE)
|
2011-09-03 00:14:45 +08:00
|
|
|
full_postfix = kstrdup(postfix, GFP_KERNEL);
|
|
|
|
else
|
|
|
|
full_postfix = kasprintf(GFP_KERNEL,
|
|
|
|
"%s_%s",
|
|
|
|
chan->extend_name,
|
|
|
|
postfix);
|
|
|
|
}
|
2013-09-08 21:57:00 +08:00
|
|
|
if (full_postfix == NULL)
|
|
|
|
return -ENOMEM;
|
2011-05-18 21:40:51 +08:00
|
|
|
|
2012-03-01 14:00:38 +08:00
|
|
|
if (chan->differential) { /* Differential can not have modifier */
|
2013-09-08 21:57:00 +08:00
|
|
|
switch (shared_by) {
|
2013-09-08 21:57:00 +08:00
|
|
|
case IIO_SHARED_BY_ALL:
|
2014-02-14 22:19:00 +08:00
|
|
|
name = kasprintf(GFP_KERNEL, "%s", full_postfix);
|
2013-09-08 21:57:00 +08:00
|
|
|
break;
|
|
|
|
case IIO_SHARED_BY_DIR:
|
2014-02-14 22:19:00 +08:00
|
|
|
name = kasprintf(GFP_KERNEL, "%s_%s",
|
2013-09-08 21:57:00 +08:00
|
|
|
iio_direction[chan->output],
|
|
|
|
full_postfix);
|
|
|
|
break;
|
2013-09-08 21:57:00 +08:00
|
|
|
case IIO_SHARED_BY_TYPE:
|
2014-02-14 22:19:00 +08:00
|
|
|
name = kasprintf(GFP_KERNEL, "%s_%s-%s_%s",
|
2011-09-03 00:14:45 +08:00
|
|
|
iio_direction[chan->output],
|
|
|
|
iio_chan_type_name_spec[chan->type],
|
|
|
|
iio_chan_type_name_spec[chan->type],
|
|
|
|
full_postfix);
|
2013-09-08 21:57:00 +08:00
|
|
|
break;
|
|
|
|
case IIO_SEPARATE:
|
|
|
|
if (!chan->indexed) {
|
2015-11-21 18:33:00 +08:00
|
|
|
WARN(1, "Differential channels must be indexed\n");
|
2013-09-08 21:57:00 +08:00
|
|
|
ret = -EINVAL;
|
|
|
|
goto error_free_full_postfix;
|
|
|
|
}
|
2014-02-14 22:19:00 +08:00
|
|
|
name = kasprintf(GFP_KERNEL,
|
2013-09-08 21:57:00 +08:00
|
|
|
"%s_%s%d-%s%d_%s",
|
2011-09-03 00:14:45 +08:00
|
|
|
iio_direction[chan->output],
|
|
|
|
iio_chan_type_name_spec[chan->type],
|
|
|
|
chan->channel,
|
|
|
|
iio_chan_type_name_spec[chan->type],
|
|
|
|
chan->channel2,
|
|
|
|
full_postfix);
|
2013-09-08 21:57:00 +08:00
|
|
|
break;
|
2011-09-03 00:14:45 +08:00
|
|
|
}
|
|
|
|
} else { /* Single ended */
|
2013-09-08 21:57:00 +08:00
|
|
|
switch (shared_by) {
|
2013-09-08 21:57:00 +08:00
|
|
|
case IIO_SHARED_BY_ALL:
|
2014-02-14 22:19:00 +08:00
|
|
|
name = kasprintf(GFP_KERNEL, "%s", full_postfix);
|
2013-09-08 21:57:00 +08:00
|
|
|
break;
|
|
|
|
case IIO_SHARED_BY_DIR:
|
2014-02-14 22:19:00 +08:00
|
|
|
name = kasprintf(GFP_KERNEL, "%s_%s",
|
2013-09-08 21:57:00 +08:00
|
|
|
iio_direction[chan->output],
|
|
|
|
full_postfix);
|
|
|
|
break;
|
2013-09-08 21:57:00 +08:00
|
|
|
case IIO_SHARED_BY_TYPE:
|
2014-02-14 22:19:00 +08:00
|
|
|
name = kasprintf(GFP_KERNEL, "%s_%s_%s",
|
2011-09-03 00:14:45 +08:00
|
|
|
iio_direction[chan->output],
|
|
|
|
iio_chan_type_name_spec[chan->type],
|
|
|
|
full_postfix);
|
2013-09-08 21:57:00 +08:00
|
|
|
break;
|
|
|
|
|
|
|
|
case IIO_SEPARATE:
|
|
|
|
if (chan->indexed)
|
2014-02-14 22:19:00 +08:00
|
|
|
name = kasprintf(GFP_KERNEL, "%s_%s%d_%s",
|
2013-09-08 21:57:00 +08:00
|
|
|
iio_direction[chan->output],
|
|
|
|
iio_chan_type_name_spec[chan->type],
|
|
|
|
chan->channel,
|
|
|
|
full_postfix);
|
|
|
|
else
|
2014-02-14 22:19:00 +08:00
|
|
|
name = kasprintf(GFP_KERNEL, "%s_%s_%s",
|
2013-09-08 21:57:00 +08:00
|
|
|
iio_direction[chan->output],
|
|
|
|
iio_chan_type_name_spec[chan->type],
|
|
|
|
full_postfix);
|
|
|
|
break;
|
|
|
|
}
|
2011-09-03 00:14:45 +08:00
|
|
|
}
|
2014-02-14 22:19:00 +08:00
|
|
|
if (name == NULL) {
|
2011-05-18 21:40:51 +08:00
|
|
|
ret = -ENOMEM;
|
|
|
|
goto error_free_full_postfix;
|
|
|
|
}
|
2014-02-14 22:19:00 +08:00
|
|
|
dev_attr->attr.name = name;
|
2011-05-18 21:40:51 +08:00
|
|
|
|
|
|
|
if (readfunc) {
|
2022-06-02 02:54:14 +08:00
|
|
|
dev_attr->attr.mode |= 0444;
|
2011-05-18 21:40:51 +08:00
|
|
|
dev_attr->show = readfunc;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (writefunc) {
|
2022-06-02 02:54:14 +08:00
|
|
|
dev_attr->attr.mode |= 0200;
|
2011-05-18 21:40:51 +08:00
|
|
|
dev_attr->store = writefunc;
|
|
|
|
}
|
2014-02-14 22:19:00 +08:00
|
|
|
|
2011-05-18 21:40:51 +08:00
|
|
|
error_free_full_postfix:
|
|
|
|
kfree(full_postfix);
|
2013-09-08 21:57:00 +08:00
|
|
|
|
2011-05-18 21:40:51 +08:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2011-08-13 00:56:03 +08:00
|
|
|
static void __iio_device_attr_deinit(struct device_attribute *dev_attr)
|
2011-05-18 21:40:51 +08:00
|
|
|
{
|
|
|
|
kfree(dev_attr->attr.name);
|
|
|
|
}
|
|
|
|
|
|
|
|
int __iio_add_chan_devattr(const char *postfix,
|
|
|
|
struct iio_chan_spec const *chan,
|
|
|
|
ssize_t (*readfunc)(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
char *buf),
|
|
|
|
ssize_t (*writefunc)(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf,
|
|
|
|
size_t len),
|
2011-09-03 00:14:41 +08:00
|
|
|
u64 mask,
|
2013-09-08 21:57:00 +08:00
|
|
|
enum iio_shared_by shared_by,
|
2011-05-18 21:40:51 +08:00
|
|
|
struct device *dev,
|
2021-02-15 18:40:32 +08:00
|
|
|
struct iio_buffer *buffer,
|
2011-05-18 21:40:51 +08:00
|
|
|
struct list_head *attr_list)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
struct iio_dev_attr *iio_attr, *t;
|
|
|
|
|
2013-10-24 19:53:00 +08:00
|
|
|
iio_attr = kzalloc(sizeof(*iio_attr), GFP_KERNEL);
|
2014-02-16 19:53:00 +08:00
|
|
|
if (iio_attr == NULL)
|
|
|
|
return -ENOMEM;
|
2011-05-18 21:40:51 +08:00
|
|
|
ret = __iio_device_attr_init(&iio_attr->dev_attr,
|
|
|
|
postfix, chan,
|
2013-09-08 21:57:00 +08:00
|
|
|
readfunc, writefunc, shared_by);
|
2011-05-18 21:40:51 +08:00
|
|
|
if (ret)
|
|
|
|
goto error_iio_dev_attr_free;
|
|
|
|
iio_attr->c = chan;
|
|
|
|
iio_attr->address = mask;
|
2021-02-15 18:40:32 +08:00
|
|
|
iio_attr->buffer = buffer;
|
2011-05-18 21:40:51 +08:00
|
|
|
list_for_each_entry(t, attr_list, l)
|
|
|
|
if (strcmp(t->dev_attr.attr.name,
|
|
|
|
iio_attr->dev_attr.attr.name) == 0) {
|
2013-09-08 21:57:00 +08:00
|
|
|
if (shared_by == IIO_SEPARATE)
|
2011-05-18 21:40:51 +08:00
|
|
|
dev_err(dev, "tried to double register : %s\n",
|
|
|
|
t->dev_attr.attr.name);
|
|
|
|
ret = -EBUSY;
|
|
|
|
goto error_device_attr_deinit;
|
|
|
|
}
|
|
|
|
list_add(&iio_attr->l, attr_list);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
error_device_attr_deinit:
|
|
|
|
__iio_device_attr_deinit(&iio_attr->dev_attr);
|
|
|
|
error_iio_dev_attr_free:
|
|
|
|
kfree(iio_attr);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2020-09-28 17:09:55 +08:00
|
|
|
static int iio_device_add_channel_label(struct iio_dev *indio_dev,
|
|
|
|
struct iio_chan_spec const *chan)
|
|
|
|
{
|
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
|
|
|
int ret;
|
|
|
|
|
iio: core: Support reading extended name as label
The point of this new change is to make the IIO tree actually parsable.
Before, given this attribute as a filename:
in_voltage0_aux_sample_rate
Userspace had no way to know if the attribute name was
"aux_sample_rate" with no extended name, or "sample_rate" with "aux" as
the extended name, or just "rate" with "aux_sample" as the extended
name.
This was somewhat possible to deduce when there was more than one
attribute present for a given channel, e.g:
in_voltage0_aux_sample_rate
in_voltage0_aux_frequency
There, it was possible to deduce that "aux" was the extended name. But
even with more than one attribute, this wasn't very robust, as two
attributes starting with the same prefix (e.g. "sample_rate" and
"sample_size") would result in the first part of the prefix being
interpreted as being part of the extended name.
To address the issue, knowing that channels will never have both a label
and an extended name, set the channel's label to the extended name.
In this case, the label's attribute will also have the extended name in
its filename, but we can live with that - userspace can open
in_voltage0_<prefix>_label and verify that it returns <prefix> to obtain
the extended name.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20210618123005.49867-3-paul@crapouillou.net
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-06-18 20:30:05 +08:00
|
|
|
if (!indio_dev->info->read_label && !chan->extend_name)
|
2020-09-28 17:09:55 +08:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
ret = __iio_add_chan_devattr("label",
|
|
|
|
chan,
|
|
|
|
&iio_read_channel_label,
|
|
|
|
NULL,
|
|
|
|
0,
|
|
|
|
IIO_SEPARATE,
|
|
|
|
&indio_dev->dev,
|
2021-02-15 18:40:32 +08:00
|
|
|
NULL,
|
2020-09-28 17:09:55 +08:00
|
|
|
&iio_dev_opaque->channel_attr_list);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2013-09-08 21:57:00 +08:00
|
|
|
static int iio_device_add_info_mask_type(struct iio_dev *indio_dev,
|
|
|
|
struct iio_chan_spec const *chan,
|
|
|
|
enum iio_shared_by shared_by,
|
|
|
|
const long *infomask)
|
2011-05-18 21:40:51 +08:00
|
|
|
{
|
2020-06-30 12:57:06 +08:00
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
2013-09-08 21:57:00 +08:00
|
|
|
int i, ret, attrcount = 0;
|
2011-05-18 21:40:51 +08:00
|
|
|
|
2017-04-25 09:16:56 +08:00
|
|
|
for_each_set_bit(i, infomask, sizeof(*infomask)*8) {
|
2014-01-04 06:24:00 +08:00
|
|
|
if (i >= ARRAY_SIZE(iio_chan_info_postfix))
|
|
|
|
return -EINVAL;
|
2013-02-20 05:10:30 +08:00
|
|
|
ret = __iio_add_chan_devattr(iio_chan_info_postfix[i],
|
|
|
|
chan,
|
|
|
|
&iio_read_channel_info,
|
|
|
|
&iio_write_channel_info,
|
|
|
|
i,
|
2013-09-08 21:57:00 +08:00
|
|
|
shared_by,
|
2013-02-20 05:10:30 +08:00
|
|
|
&indio_dev->dev,
|
2021-02-15 18:40:32 +08:00
|
|
|
NULL,
|
2020-06-30 12:57:06 +08:00
|
|
|
&iio_dev_opaque->channel_attr_list);
|
2013-09-08 21:57:00 +08:00
|
|
|
if ((ret == -EBUSY) && (shared_by != IIO_SEPARATE))
|
2013-02-20 05:10:30 +08:00
|
|
|
continue;
|
2013-09-08 21:57:00 +08:00
|
|
|
else if (ret < 0)
|
|
|
|
return ret;
|
2013-02-20 05:10:30 +08:00
|
|
|
attrcount++;
|
|
|
|
}
|
2012-02-22 01:38:12 +08:00
|
|
|
|
2013-09-08 21:57:00 +08:00
|
|
|
return attrcount;
|
|
|
|
}
|
|
|
|
|
2016-11-08 19:58:51 +08:00
|
|
|
static int iio_device_add_info_mask_type_avail(struct iio_dev *indio_dev,
|
|
|
|
struct iio_chan_spec const *chan,
|
|
|
|
enum iio_shared_by shared_by,
|
|
|
|
const long *infomask)
|
|
|
|
{
|
2020-06-30 12:57:06 +08:00
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
2016-11-08 19:58:51 +08:00
|
|
|
int i, ret, attrcount = 0;
|
|
|
|
char *avail_postfix;
|
|
|
|
|
2017-04-25 09:16:56 +08:00
|
|
|
for_each_set_bit(i, infomask, sizeof(*infomask) * 8) {
|
2019-06-04 20:40:00 +08:00
|
|
|
if (i >= ARRAY_SIZE(iio_chan_info_postfix))
|
|
|
|
return -EINVAL;
|
2016-11-08 19:58:51 +08:00
|
|
|
avail_postfix = kasprintf(GFP_KERNEL,
|
|
|
|
"%s_available",
|
|
|
|
iio_chan_info_postfix[i]);
|
|
|
|
if (!avail_postfix)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
ret = __iio_add_chan_devattr(avail_postfix,
|
|
|
|
chan,
|
|
|
|
&iio_read_channel_info_avail,
|
|
|
|
NULL,
|
|
|
|
i,
|
|
|
|
shared_by,
|
|
|
|
&indio_dev->dev,
|
2021-02-15 18:40:32 +08:00
|
|
|
NULL,
|
2020-06-30 12:57:06 +08:00
|
|
|
&iio_dev_opaque->channel_attr_list);
|
2016-11-08 19:58:51 +08:00
|
|
|
kfree(avail_postfix);
|
|
|
|
if ((ret == -EBUSY) && (shared_by != IIO_SEPARATE))
|
|
|
|
continue;
|
|
|
|
else if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
attrcount++;
|
|
|
|
}
|
|
|
|
|
|
|
|
return attrcount;
|
|
|
|
}
|
|
|
|
|
2013-09-08 21:57:00 +08:00
|
|
|
static int iio_device_add_channel_sysfs(struct iio_dev *indio_dev,
|
|
|
|
struct iio_chan_spec const *chan)
|
|
|
|
{
|
2020-06-30 12:57:06 +08:00
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
2013-09-08 21:57:00 +08:00
|
|
|
int ret, attrcount = 0;
|
|
|
|
const struct iio_chan_spec_ext_info *ext_info;
|
|
|
|
|
|
|
|
if (chan->channel < 0)
|
|
|
|
return 0;
|
|
|
|
ret = iio_device_add_info_mask_type(indio_dev, chan,
|
|
|
|
IIO_SEPARATE,
|
|
|
|
&chan->info_mask_separate);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
attrcount += ret;
|
|
|
|
|
2016-11-08 19:58:51 +08:00
|
|
|
ret = iio_device_add_info_mask_type_avail(indio_dev, chan,
|
|
|
|
IIO_SEPARATE,
|
2022-08-20 02:20:12 +08:00
|
|
|
&chan->info_mask_separate_available);
|
2016-11-08 19:58:51 +08:00
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
attrcount += ret;
|
|
|
|
|
2013-09-08 21:57:00 +08:00
|
|
|
ret = iio_device_add_info_mask_type(indio_dev, chan,
|
|
|
|
IIO_SHARED_BY_TYPE,
|
|
|
|
&chan->info_mask_shared_by_type);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
attrcount += ret;
|
|
|
|
|
2016-11-08 19:58:51 +08:00
|
|
|
ret = iio_device_add_info_mask_type_avail(indio_dev, chan,
|
|
|
|
IIO_SHARED_BY_TYPE,
|
2022-08-20 02:20:12 +08:00
|
|
|
&chan->info_mask_shared_by_type_available);
|
2016-11-08 19:58:51 +08:00
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
attrcount += ret;
|
|
|
|
|
2013-09-08 21:57:00 +08:00
|
|
|
ret = iio_device_add_info_mask_type(indio_dev, chan,
|
|
|
|
IIO_SHARED_BY_DIR,
|
|
|
|
&chan->info_mask_shared_by_dir);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
attrcount += ret;
|
|
|
|
|
2016-11-08 19:58:51 +08:00
|
|
|
ret = iio_device_add_info_mask_type_avail(indio_dev, chan,
|
|
|
|
IIO_SHARED_BY_DIR,
|
|
|
|
&chan->info_mask_shared_by_dir_available);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
attrcount += ret;
|
|
|
|
|
2013-09-08 21:57:00 +08:00
|
|
|
ret = iio_device_add_info_mask_type(indio_dev, chan,
|
|
|
|
IIO_SHARED_BY_ALL,
|
|
|
|
&chan->info_mask_shared_by_all);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
attrcount += ret;
|
|
|
|
|
2016-11-08 19:58:51 +08:00
|
|
|
ret = iio_device_add_info_mask_type_avail(indio_dev, chan,
|
|
|
|
IIO_SHARED_BY_ALL,
|
|
|
|
&chan->info_mask_shared_by_all_available);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
attrcount += ret;
|
|
|
|
|
2020-09-28 17:09:55 +08:00
|
|
|
ret = iio_device_add_channel_label(indio_dev, chan);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
attrcount += ret;
|
|
|
|
|
2012-02-22 01:38:12 +08:00
|
|
|
if (chan->ext_info) {
|
|
|
|
unsigned int i = 0;
|
2022-07-28 02:18:54 +08:00
|
|
|
|
2012-02-22 01:38:12 +08:00
|
|
|
for (ext_info = chan->ext_info; ext_info->name; ext_info++) {
|
|
|
|
ret = __iio_add_chan_devattr(ext_info->name,
|
|
|
|
chan,
|
|
|
|
ext_info->read ?
|
|
|
|
&iio_read_channel_ext_info : NULL,
|
|
|
|
ext_info->write ?
|
|
|
|
&iio_write_channel_ext_info : NULL,
|
|
|
|
i,
|
|
|
|
ext_info->shared,
|
|
|
|
&indio_dev->dev,
|
2021-02-15 18:40:32 +08:00
|
|
|
NULL,
|
2020-06-30 12:57:06 +08:00
|
|
|
&iio_dev_opaque->channel_attr_list);
|
2012-02-22 01:38:12 +08:00
|
|
|
i++;
|
|
|
|
if (ret == -EBUSY && ext_info->shared)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
if (ret)
|
2013-09-08 21:57:00 +08:00
|
|
|
return ret;
|
2012-02-22 01:38:12 +08:00
|
|
|
|
|
|
|
attrcount++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2013-09-08 21:57:00 +08:00
|
|
|
return attrcount;
|
2011-05-18 21:40:51 +08:00
|
|
|
}
|
|
|
|
|
2013-10-07 19:50:00 +08:00
|
|
|
/**
|
|
|
|
* iio_free_chan_devattr_list() - Free a list of IIO device attributes
|
|
|
|
* @attr_list: List of IIO device attributes
|
|
|
|
*
|
|
|
|
* This function frees the memory allocated for each of the IIO device
|
2015-02-19 22:17:44 +08:00
|
|
|
* attributes in the list.
|
2013-10-07 19:50:00 +08:00
|
|
|
*/
|
|
|
|
void iio_free_chan_devattr_list(struct list_head *attr_list)
|
2011-05-18 21:40:51 +08:00
|
|
|
{
|
2013-10-07 19:50:00 +08:00
|
|
|
struct iio_dev_attr *p, *n;
|
|
|
|
|
|
|
|
list_for_each_entry_safe(p, n, attr_list, l) {
|
2021-02-15 18:40:33 +08:00
|
|
|
kfree_const(p->dev_attr.attr.name);
|
2015-02-19 22:17:44 +08:00
|
|
|
list_del(&p->l);
|
2013-10-07 19:50:00 +08:00
|
|
|
kfree(p);
|
|
|
|
}
|
2011-05-18 21:40:51 +08:00
|
|
|
}
|
|
|
|
|
2022-06-02 02:54:14 +08:00
|
|
|
static ssize_t name_show(struct device *dev, struct device_attribute *attr,
|
|
|
|
char *buf)
|
2011-05-18 21:41:43 +08:00
|
|
|
{
|
2012-05-12 21:39:33 +08:00
|
|
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
|
2022-07-28 02:18:54 +08:00
|
|
|
|
2021-03-20 15:14:02 +08:00
|
|
|
return sysfs_emit(buf, "%s\n", indio_dev->name);
|
2011-05-18 21:41:43 +08:00
|
|
|
}
|
|
|
|
|
2022-06-02 02:54:14 +08:00
|
|
|
static DEVICE_ATTR_RO(name);
|
2011-05-18 21:41:43 +08:00
|
|
|
|
2022-06-02 02:54:14 +08:00
|
|
|
static ssize_t label_show(struct device *dev, struct device_attribute *attr,
|
|
|
|
char *buf)
|
2019-09-19 22:36:08 +08:00
|
|
|
{
|
|
|
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
|
2022-07-28 02:18:54 +08:00
|
|
|
|
2021-03-20 15:14:02 +08:00
|
|
|
return sysfs_emit(buf, "%s\n", indio_dev->label);
|
2019-09-19 22:36:08 +08:00
|
|
|
}
|
|
|
|
|
2022-06-02 02:54:14 +08:00
|
|
|
static DEVICE_ATTR_RO(label);
|
2019-09-19 22:36:08 +08:00
|
|
|
|
2022-06-02 02:54:14 +08:00
|
|
|
static ssize_t current_timestamp_clock_show(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
char *buf)
|
2016-03-10 02:05:49 +08:00
|
|
|
{
|
|
|
|
const struct iio_dev *indio_dev = dev_to_iio_dev(dev);
|
|
|
|
const clockid_t clk = iio_device_get_clock(indio_dev);
|
|
|
|
const char *name;
|
|
|
|
ssize_t sz;
|
|
|
|
|
|
|
|
switch (clk) {
|
|
|
|
case CLOCK_REALTIME:
|
|
|
|
name = "realtime\n";
|
|
|
|
sz = sizeof("realtime\n");
|
|
|
|
break;
|
|
|
|
case CLOCK_MONOTONIC:
|
|
|
|
name = "monotonic\n";
|
|
|
|
sz = sizeof("monotonic\n");
|
|
|
|
break;
|
|
|
|
case CLOCK_MONOTONIC_RAW:
|
|
|
|
name = "monotonic_raw\n";
|
|
|
|
sz = sizeof("monotonic_raw\n");
|
|
|
|
break;
|
|
|
|
case CLOCK_REALTIME_COARSE:
|
|
|
|
name = "realtime_coarse\n";
|
|
|
|
sz = sizeof("realtime_coarse\n");
|
|
|
|
break;
|
|
|
|
case CLOCK_MONOTONIC_COARSE:
|
|
|
|
name = "monotonic_coarse\n";
|
|
|
|
sz = sizeof("monotonic_coarse\n");
|
|
|
|
break;
|
|
|
|
case CLOCK_BOOTTIME:
|
|
|
|
name = "boottime\n";
|
|
|
|
sz = sizeof("boottime\n");
|
|
|
|
break;
|
|
|
|
case CLOCK_TAI:
|
|
|
|
name = "tai\n";
|
|
|
|
sz = sizeof("tai\n");
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
BUG();
|
|
|
|
}
|
|
|
|
|
|
|
|
memcpy(buf, name, sz);
|
|
|
|
return sz;
|
|
|
|
}
|
|
|
|
|
2022-06-02 02:54:14 +08:00
|
|
|
static ssize_t current_timestamp_clock_store(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf, size_t len)
|
2016-03-10 02:05:49 +08:00
|
|
|
{
|
|
|
|
clockid_t clk;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (sysfs_streq(buf, "realtime"))
|
|
|
|
clk = CLOCK_REALTIME;
|
|
|
|
else if (sysfs_streq(buf, "monotonic"))
|
|
|
|
clk = CLOCK_MONOTONIC;
|
|
|
|
else if (sysfs_streq(buf, "monotonic_raw"))
|
|
|
|
clk = CLOCK_MONOTONIC_RAW;
|
|
|
|
else if (sysfs_streq(buf, "realtime_coarse"))
|
|
|
|
clk = CLOCK_REALTIME_COARSE;
|
|
|
|
else if (sysfs_streq(buf, "monotonic_coarse"))
|
|
|
|
clk = CLOCK_MONOTONIC_COARSE;
|
|
|
|
else if (sysfs_streq(buf, "boottime"))
|
|
|
|
clk = CLOCK_BOOTTIME;
|
|
|
|
else if (sysfs_streq(buf, "tai"))
|
|
|
|
clk = CLOCK_TAI;
|
|
|
|
else
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
ret = iio_device_set_clock(dev_to_iio_dev(dev), clk);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
2021-02-15 18:40:29 +08:00
|
|
|
int iio_device_register_sysfs_group(struct iio_dev *indio_dev,
|
|
|
|
const struct attribute_group *group)
|
|
|
|
{
|
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
|
|
|
const struct attribute_group **new, **old = iio_dev_opaque->groups;
|
|
|
|
unsigned int cnt = iio_dev_opaque->groupcounter;
|
|
|
|
|
|
|
|
new = krealloc(old, sizeof(*new) * (cnt + 2), GFP_KERNEL);
|
|
|
|
if (!new)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
new[iio_dev_opaque->groupcounter++] = group;
|
|
|
|
new[iio_dev_opaque->groupcounter] = NULL;
|
|
|
|
|
|
|
|
iio_dev_opaque->groups = new;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2022-06-02 02:54:14 +08:00
|
|
|
static DEVICE_ATTR_RW(current_timestamp_clock);
|
2016-03-10 02:05:49 +08:00
|
|
|
|
2011-10-07 00:14:35 +08:00
|
|
|
static int iio_device_register_sysfs(struct iio_dev *indio_dev)
|
2011-05-18 21:40:51 +08:00
|
|
|
{
|
2020-06-30 12:57:06 +08:00
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
2011-09-03 00:14:40 +08:00
|
|
|
int i, ret = 0, attrcount, attrn, attrcount_orig = 0;
|
2013-10-07 19:50:00 +08:00
|
|
|
struct iio_dev_attr *p;
|
2016-03-10 02:05:49 +08:00
|
|
|
struct attribute **attr, *clk = NULL;
|
2011-05-18 21:40:51 +08:00
|
|
|
|
2011-09-03 00:14:40 +08:00
|
|
|
/* First count elements in any existing group */
|
2011-10-07 00:14:35 +08:00
|
|
|
if (indio_dev->info->attrs) {
|
|
|
|
attr = indio_dev->info->attrs->attrs;
|
2011-09-03 00:14:40 +08:00
|
|
|
while (*attr++ != NULL)
|
|
|
|
attrcount_orig++;
|
2009-08-19 01:06:19 +08:00
|
|
|
}
|
2011-09-03 00:14:40 +08:00
|
|
|
attrcount = attrcount_orig;
|
2011-05-18 21:40:51 +08:00
|
|
|
/*
|
|
|
|
* New channel registration method - relies on the fact a group does
|
2012-08-26 20:43:00 +08:00
|
|
|
* not need to be initialized if its name is NULL.
|
2011-05-18 21:40:51 +08:00
|
|
|
*/
|
2011-10-07 00:14:35 +08:00
|
|
|
if (indio_dev->channels)
|
|
|
|
for (i = 0; i < indio_dev->num_channels; i++) {
|
2016-03-10 02:05:49 +08:00
|
|
|
const struct iio_chan_spec *chan =
|
|
|
|
&indio_dev->channels[i];
|
|
|
|
|
|
|
|
if (chan->type == IIO_TIMESTAMP)
|
|
|
|
clk = &dev_attr_current_timestamp_clock.attr;
|
|
|
|
|
|
|
|
ret = iio_device_add_channel_sysfs(indio_dev, chan);
|
2011-05-18 21:40:51 +08:00
|
|
|
if (ret < 0)
|
|
|
|
goto error_clear_attrs;
|
2011-09-03 00:14:40 +08:00
|
|
|
attrcount += ret;
|
2011-05-18 21:40:51 +08:00
|
|
|
}
|
2011-09-03 00:14:40 +08:00
|
|
|
|
2020-06-30 12:57:08 +08:00
|
|
|
if (iio_dev_opaque->event_interface)
|
2016-03-10 02:05:49 +08:00
|
|
|
clk = &dev_attr_current_timestamp_clock.attr;
|
|
|
|
|
2011-10-07 00:14:35 +08:00
|
|
|
if (indio_dev->name)
|
2011-09-03 00:14:40 +08:00
|
|
|
attrcount++;
|
2019-09-19 22:36:08 +08:00
|
|
|
if (indio_dev->label)
|
|
|
|
attrcount++;
|
2016-03-10 02:05:49 +08:00
|
|
|
if (clk)
|
|
|
|
attrcount++;
|
2011-09-03 00:14:40 +08:00
|
|
|
|
2020-06-30 12:57:06 +08:00
|
|
|
iio_dev_opaque->chan_attr_group.attrs =
|
|
|
|
kcalloc(attrcount + 1,
|
|
|
|
sizeof(iio_dev_opaque->chan_attr_group.attrs[0]),
|
|
|
|
GFP_KERNEL);
|
|
|
|
if (iio_dev_opaque->chan_attr_group.attrs == NULL) {
|
2011-09-03 00:14:40 +08:00
|
|
|
ret = -ENOMEM;
|
|
|
|
goto error_clear_attrs;
|
2011-05-18 21:41:43 +08:00
|
|
|
}
|
2022-09-07 21:21:58 +08:00
|
|
|
/* Copy across original attributes, and point to original binary attributes */
|
2020-11-25 16:46:06 +08:00
|
|
|
if (indio_dev->info->attrs) {
|
2020-06-30 12:57:06 +08:00
|
|
|
memcpy(iio_dev_opaque->chan_attr_group.attrs,
|
2011-10-07 00:14:35 +08:00
|
|
|
indio_dev->info->attrs->attrs,
|
2020-06-30 12:57:06 +08:00
|
|
|
sizeof(iio_dev_opaque->chan_attr_group.attrs[0])
|
2011-09-03 00:14:40 +08:00
|
|
|
*attrcount_orig);
|
2020-11-25 16:46:06 +08:00
|
|
|
iio_dev_opaque->chan_attr_group.is_visible =
|
|
|
|
indio_dev->info->attrs->is_visible;
|
2022-09-07 21:21:58 +08:00
|
|
|
iio_dev_opaque->chan_attr_group.bin_attrs =
|
|
|
|
indio_dev->info->attrs->bin_attrs;
|
2020-11-25 16:46:06 +08:00
|
|
|
}
|
2011-09-03 00:14:40 +08:00
|
|
|
attrn = attrcount_orig;
|
|
|
|
/* Add all elements from the list. */
|
2020-06-30 12:57:06 +08:00
|
|
|
list_for_each_entry(p, &iio_dev_opaque->channel_attr_list, l)
|
|
|
|
iio_dev_opaque->chan_attr_group.attrs[attrn++] = &p->dev_attr.attr;
|
2011-10-07 00:14:35 +08:00
|
|
|
if (indio_dev->name)
|
2020-06-30 12:57:06 +08:00
|
|
|
iio_dev_opaque->chan_attr_group.attrs[attrn++] = &dev_attr_name.attr;
|
2019-09-19 22:36:08 +08:00
|
|
|
if (indio_dev->label)
|
2020-06-30 12:57:06 +08:00
|
|
|
iio_dev_opaque->chan_attr_group.attrs[attrn++] = &dev_attr_label.attr;
|
2016-03-10 02:05:49 +08:00
|
|
|
if (clk)
|
2020-06-30 12:57:06 +08:00
|
|
|
iio_dev_opaque->chan_attr_group.attrs[attrn++] = clk;
|
2011-09-03 00:14:40 +08:00
|
|
|
|
2021-02-15 18:40:29 +08:00
|
|
|
ret = iio_device_register_sysfs_group(indio_dev,
|
|
|
|
&iio_dev_opaque->chan_attr_group);
|
|
|
|
if (ret)
|
|
|
|
goto error_clear_attrs;
|
2011-09-03 00:14:40 +08:00
|
|
|
|
2011-05-18 21:40:51 +08:00
|
|
|
return 0;
|
2011-05-18 21:41:43 +08:00
|
|
|
|
2011-05-18 21:40:51 +08:00
|
|
|
error_clear_attrs:
|
2020-06-30 12:57:06 +08:00
|
|
|
iio_free_chan_devattr_list(&iio_dev_opaque->channel_attr_list);
|
2011-05-18 21:40:51 +08:00
|
|
|
|
2011-09-03 00:14:40 +08:00
|
|
|
return ret;
|
2009-08-19 01:06:19 +08:00
|
|
|
}
|
|
|
|
|
2011-10-07 00:14:35 +08:00
|
|
|
static void iio_device_unregister_sysfs(struct iio_dev *indio_dev)
|
2009-08-19 01:06:19 +08:00
|
|
|
{
|
2020-06-30 12:57:06 +08:00
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
2011-05-18 21:40:51 +08:00
|
|
|
|
2020-06-30 12:57:06 +08:00
|
|
|
iio_free_chan_devattr_list(&iio_dev_opaque->channel_attr_list);
|
|
|
|
kfree(iio_dev_opaque->chan_attr_group.attrs);
|
|
|
|
iio_dev_opaque->chan_attr_group.attrs = NULL;
|
2021-02-15 18:40:29 +08:00
|
|
|
kfree(iio_dev_opaque->groups);
|
2021-10-13 11:05:32 +08:00
|
|
|
iio_dev_opaque->groups = NULL;
|
2009-08-19 01:06:19 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static void iio_dev_release(struct device *device)
|
|
|
|
{
|
2012-05-12 21:39:33 +08:00
|
|
|
struct iio_dev *indio_dev = dev_to_iio_dev(device);
|
2020-06-30 12:57:03 +08:00
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
|
|
|
|
2017-04-27 21:29:15 +08:00
|
|
|
if (indio_dev->modes & INDIO_ALL_TRIGGERED_MODES)
|
2011-10-07 00:14:35 +08:00
|
|
|
iio_device_unregister_trigger_consumer(indio_dev);
|
|
|
|
iio_device_unregister_eventset(indio_dev);
|
|
|
|
iio_device_unregister_sysfs(indio_dev);
|
2012-06-04 16:41:42 +08:00
|
|
|
|
2021-03-08 02:54:44 +08:00
|
|
|
iio_device_detach_buffers(indio_dev);
|
2013-10-04 19:06:00 +08:00
|
|
|
|
iio: Use per-device lockdep class for mlock
If an IIO driver uses callbacks from another IIO driver and calls
iio_channel_start_all_cb() from one of its buffer setup ops, then
lockdep complains due to the lock nesting, as in the below example with
lmp91000.
Since the locks are being taken on different IIO devices, there is no
actual deadlock. Fix the warning by telling lockdep to use a different
class for each iio_device.
============================================
WARNING: possible recursive locking detected
--------------------------------------------
python3/23 is trying to acquire lock:
(&indio_dev->mlock){+.+.}-{3:3}, at: iio_update_buffers
but task is already holding lock:
(&indio_dev->mlock){+.+.}-{3:3}, at: enable_store
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&indio_dev->mlock);
lock(&indio_dev->mlock);
*** DEADLOCK ***
May be due to missing lock nesting notation
5 locks held by python3/23:
#0: (sb_writers#5){.+.+}-{0:0}, at: ksys_write
#1: (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter
#2: (kn->active#14){.+.+}-{0:0}, at: kernfs_fop_write_iter
#3: (&indio_dev->mlock){+.+.}-{3:3}, at: enable_store
#4: (&iio_dev_opaque->info_exist_lock){+.+.}-{3:3}, at: iio_update_buffers
Call Trace:
__mutex_lock
iio_update_buffers
iio_channel_start_all_cb
lmp91000_buffer_postenable
__iio_update_buffers
enable_store
Fixes: 67e17300dc1d76 ("iio: potentiostat: add LMP91000 support")
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20220829091840.2791846-1-vincent.whitchurch@axis.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2022-08-29 17:18:40 +08:00
|
|
|
lockdep_unregister_key(&iio_dev_opaque->mlock_key);
|
|
|
|
|
2022-05-27 17:17:39 +08:00
|
|
|
ida_free(&iio_ida, iio_dev_opaque->id);
|
2020-06-30 12:57:03 +08:00
|
|
|
kfree(iio_dev_opaque);
|
2009-08-19 01:06:19 +08:00
|
|
|
}
|
|
|
|
|
2021-10-31 16:04:21 +08:00
|
|
|
const struct device_type iio_device_type = {
|
2009-08-19 01:06:19 +08:00
|
|
|
.name = "iio_device",
|
|
|
|
.release = iio_dev_release,
|
|
|
|
};
|
|
|
|
|
2013-10-29 19:39:00 +08:00
|
|
|
/**
|
|
|
|
* iio_device_alloc() - allocate an iio_dev from a driver
|
2020-09-13 21:21:15 +08:00
|
|
|
* @parent: Parent device.
|
2013-10-29 19:39:00 +08:00
|
|
|
* @sizeof_priv: Space to allocate for private structure.
|
|
|
|
**/
|
2020-06-03 19:40:18 +08:00
|
|
|
struct iio_dev *iio_device_alloc(struct device *parent, int sizeof_priv)
|
2009-08-19 01:06:19 +08:00
|
|
|
{
|
2020-06-30 12:57:03 +08:00
|
|
|
struct iio_dev_opaque *iio_dev_opaque;
|
2021-02-15 18:40:40 +08:00
|
|
|
struct iio_dev *indio_dev;
|
2011-04-16 01:55:56 +08:00
|
|
|
size_t alloc_size;
|
|
|
|
|
2020-06-30 12:57:03 +08:00
|
|
|
alloc_size = sizeof(struct iio_dev_opaque);
|
2011-04-16 01:55:56 +08:00
|
|
|
if (sizeof_priv) {
|
2022-05-09 01:55:41 +08:00
|
|
|
alloc_size = ALIGN(alloc_size, IIO_DMA_MINALIGN);
|
2011-04-16 01:55:56 +08:00
|
|
|
alloc_size += sizeof_priv;
|
|
|
|
}
|
|
|
|
|
2020-06-30 12:57:03 +08:00
|
|
|
iio_dev_opaque = kzalloc(alloc_size, GFP_KERNEL);
|
|
|
|
if (!iio_dev_opaque)
|
2020-04-19 23:13:37 +08:00
|
|
|
return NULL;
|
|
|
|
|
2021-02-15 18:40:40 +08:00
|
|
|
indio_dev = &iio_dev_opaque->indio_dev;
|
|
|
|
indio_dev->priv = (char *)iio_dev_opaque +
|
2022-05-09 01:55:41 +08:00
|
|
|
ALIGN(sizeof(struct iio_dev_opaque), IIO_DMA_MINALIGN);
|
2020-06-30 12:57:03 +08:00
|
|
|
|
2021-02-15 18:40:40 +08:00
|
|
|
indio_dev->dev.parent = parent;
|
|
|
|
indio_dev->dev.type = &iio_device_type;
|
|
|
|
indio_dev->dev.bus = &iio_bus_type;
|
|
|
|
device_initialize(&indio_dev->dev);
|
2022-10-12 23:16:20 +08:00
|
|
|
mutex_init(&iio_dev_opaque->mlock);
|
2021-04-27 01:49:08 +08:00
|
|
|
mutex_init(&iio_dev_opaque->info_exist_lock);
|
2020-06-30 12:57:06 +08:00
|
|
|
INIT_LIST_HEAD(&iio_dev_opaque->channel_attr_list);
|
2020-04-19 23:13:37 +08:00
|
|
|
|
2022-05-27 17:17:39 +08:00
|
|
|
iio_dev_opaque->id = ida_alloc(&iio_ida, GFP_KERNEL);
|
2021-04-27 01:49:03 +08:00
|
|
|
if (iio_dev_opaque->id < 0) {
|
2020-04-19 23:13:37 +08:00
|
|
|
/* cannot use a dev_err as the name isn't available */
|
|
|
|
pr_err("failed to get device id\n");
|
2020-06-30 12:57:03 +08:00
|
|
|
kfree(iio_dev_opaque);
|
2020-04-19 23:13:37 +08:00
|
|
|
return NULL;
|
2009-08-19 01:06:19 +08:00
|
|
|
}
|
2021-10-12 14:36:24 +08:00
|
|
|
|
|
|
|
if (dev_set_name(&indio_dev->dev, "iio:device%d", iio_dev_opaque->id)) {
|
2022-05-27 17:17:39 +08:00
|
|
|
ida_free(&iio_ida, iio_dev_opaque->id);
|
2021-10-12 14:36:24 +08:00
|
|
|
kfree(iio_dev_opaque);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2020-06-30 12:57:07 +08:00
|
|
|
INIT_LIST_HEAD(&iio_dev_opaque->buffer_list);
|
2020-09-24 16:41:55 +08:00
|
|
|
INIT_LIST_HEAD(&iio_dev_opaque->ioctl_handlers);
|
2009-08-19 01:06:19 +08:00
|
|
|
|
iio: Use per-device lockdep class for mlock
If an IIO driver uses callbacks from another IIO driver and calls
iio_channel_start_all_cb() from one of its buffer setup ops, then
lockdep complains due to the lock nesting, as in the below example with
lmp91000.
Since the locks are being taken on different IIO devices, there is no
actual deadlock. Fix the warning by telling lockdep to use a different
class for each iio_device.
============================================
WARNING: possible recursive locking detected
--------------------------------------------
python3/23 is trying to acquire lock:
(&indio_dev->mlock){+.+.}-{3:3}, at: iio_update_buffers
but task is already holding lock:
(&indio_dev->mlock){+.+.}-{3:3}, at: enable_store
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&indio_dev->mlock);
lock(&indio_dev->mlock);
*** DEADLOCK ***
May be due to missing lock nesting notation
5 locks held by python3/23:
#0: (sb_writers#5){.+.+}-{0:0}, at: ksys_write
#1: (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter
#2: (kn->active#14){.+.+}-{0:0}, at: kernfs_fop_write_iter
#3: (&indio_dev->mlock){+.+.}-{3:3}, at: enable_store
#4: (&iio_dev_opaque->info_exist_lock){+.+.}-{3:3}, at: iio_update_buffers
Call Trace:
__mutex_lock
iio_update_buffers
iio_channel_start_all_cb
lmp91000_buffer_postenable
__iio_update_buffers
enable_store
Fixes: 67e17300dc1d76 ("iio: potentiostat: add LMP91000 support")
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20220829091840.2791846-1-vincent.whitchurch@axis.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2022-08-29 17:18:40 +08:00
|
|
|
lockdep_register_key(&iio_dev_opaque->mlock_key);
|
2022-10-12 23:16:20 +08:00
|
|
|
lockdep_set_class(&iio_dev_opaque->mlock, &iio_dev_opaque->mlock_key);
|
iio: Use per-device lockdep class for mlock
If an IIO driver uses callbacks from another IIO driver and calls
iio_channel_start_all_cb() from one of its buffer setup ops, then
lockdep complains due to the lock nesting, as in the below example with
lmp91000.
Since the locks are being taken on different IIO devices, there is no
actual deadlock. Fix the warning by telling lockdep to use a different
class for each iio_device.
============================================
WARNING: possible recursive locking detected
--------------------------------------------
python3/23 is trying to acquire lock:
(&indio_dev->mlock){+.+.}-{3:3}, at: iio_update_buffers
but task is already holding lock:
(&indio_dev->mlock){+.+.}-{3:3}, at: enable_store
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&indio_dev->mlock);
lock(&indio_dev->mlock);
*** DEADLOCK ***
May be due to missing lock nesting notation
5 locks held by python3/23:
#0: (sb_writers#5){.+.+}-{0:0}, at: ksys_write
#1: (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter
#2: (kn->active#14){.+.+}-{0:0}, at: kernfs_fop_write_iter
#3: (&indio_dev->mlock){+.+.}-{3:3}, at: enable_store
#4: (&iio_dev_opaque->info_exist_lock){+.+.}-{3:3}, at: iio_update_buffers
Call Trace:
__mutex_lock
iio_update_buffers
iio_channel_start_all_cb
lmp91000_buffer_postenable
__iio_update_buffers
enable_store
Fixes: 67e17300dc1d76 ("iio: potentiostat: add LMP91000 support")
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20220829091840.2791846-1-vincent.whitchurch@axis.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2022-08-29 17:18:40 +08:00
|
|
|
|
2021-02-15 18:40:40 +08:00
|
|
|
return indio_dev;
|
2009-08-19 01:06:19 +08:00
|
|
|
}
|
2012-04-26 19:35:01 +08:00
|
|
|
EXPORT_SYMBOL(iio_device_alloc);
|
2009-08-19 01:06:19 +08:00
|
|
|
|
2013-10-29 19:39:00 +08:00
|
|
|
/**
|
|
|
|
* iio_device_free() - free an iio_dev from a driver
|
|
|
|
* @dev: the iio_dev associated with the device
|
|
|
|
**/
|
2012-04-26 19:35:01 +08:00
|
|
|
void iio_device_free(struct iio_dev *dev)
|
2009-08-19 01:06:19 +08:00
|
|
|
{
|
2012-06-04 16:41:42 +08:00
|
|
|
if (dev)
|
|
|
|
put_device(&dev->dev);
|
2009-08-19 01:06:19 +08:00
|
|
|
}
|
2012-04-26 19:35:01 +08:00
|
|
|
EXPORT_SYMBOL(iio_device_free);
|
2009-08-19 01:06:19 +08:00
|
|
|
|
2021-04-08 19:38:14 +08:00
|
|
|
static void devm_iio_device_release(void *iio_dev)
|
2013-07-18 18:19:00 +08:00
|
|
|
{
|
2021-04-08 19:38:14 +08:00
|
|
|
iio_device_free(iio_dev);
|
2013-07-18 18:19:00 +08:00
|
|
|
}
|
|
|
|
|
2013-10-29 19:39:00 +08:00
|
|
|
/**
|
|
|
|
* devm_iio_device_alloc - Resource-managed iio_device_alloc()
|
2020-06-03 19:40:18 +08:00
|
|
|
* @parent: Device to allocate iio_dev for, and parent for this IIO device
|
2013-10-29 19:39:00 +08:00
|
|
|
* @sizeof_priv: Space to allocate for private structure.
|
|
|
|
*
|
|
|
|
* Managed iio_device_alloc. iio_dev allocated with this function is
|
|
|
|
* automatically freed on driver detach.
|
|
|
|
*
|
|
|
|
* RETURNS:
|
|
|
|
* Pointer to allocated iio_dev on success, NULL on failure.
|
|
|
|
*/
|
2020-06-03 19:40:18 +08:00
|
|
|
struct iio_dev *devm_iio_device_alloc(struct device *parent, int sizeof_priv)
|
2013-07-18 18:19:00 +08:00
|
|
|
{
|
2021-04-08 19:38:14 +08:00
|
|
|
struct iio_dev *iio_dev;
|
|
|
|
int ret;
|
2013-07-18 18:19:00 +08:00
|
|
|
|
2021-04-08 19:38:14 +08:00
|
|
|
iio_dev = iio_device_alloc(parent, sizeof_priv);
|
|
|
|
if (!iio_dev)
|
2013-07-18 18:19:00 +08:00
|
|
|
return NULL;
|
|
|
|
|
2021-04-08 19:38:14 +08:00
|
|
|
ret = devm_add_action_or_reset(parent, devm_iio_device_release,
|
|
|
|
iio_dev);
|
|
|
|
if (ret)
|
2021-05-15 17:56:39 +08:00
|
|
|
return NULL;
|
2013-07-18 18:19:00 +08:00
|
|
|
|
|
|
|
return iio_dev;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(devm_iio_device_alloc);
|
|
|
|
|
2011-08-30 19:32:47 +08:00
|
|
|
/**
|
2011-09-21 18:15:57 +08:00
|
|
|
* iio_chrdev_open() - chrdev file open for buffer access and ioctls
|
2015-07-24 21:16:19 +08:00
|
|
|
* @inode: Inode structure for identifying the device in the file system
|
|
|
|
* @filp: File structure for iio device used to keep and later access
|
|
|
|
* private data
|
|
|
|
*
|
|
|
|
* Return: 0 on success or -EBUSY if the device is already opened
|
2011-08-30 19:32:47 +08:00
|
|
|
**/
|
|
|
|
static int iio_chrdev_open(struct inode *inode, struct file *filp)
|
|
|
|
{
|
2021-04-27 01:49:09 +08:00
|
|
|
struct iio_dev_opaque *iio_dev_opaque =
|
|
|
|
container_of(inode->i_cdev, struct iio_dev_opaque, chrdev);
|
|
|
|
struct iio_dev *indio_dev = &iio_dev_opaque->indio_dev;
|
2021-02-15 18:40:35 +08:00
|
|
|
struct iio_dev_buffer_pair *ib;
|
2011-12-19 22:23:45 +08:00
|
|
|
|
2021-04-27 01:49:10 +08:00
|
|
|
if (test_and_set_bit(IIO_BUSY_BIT_POS, &iio_dev_opaque->flags))
|
2011-12-19 22:23:45 +08:00
|
|
|
return -EBUSY;
|
|
|
|
|
2013-09-19 04:02:00 +08:00
|
|
|
iio_device_get(indio_dev);
|
|
|
|
|
2021-02-15 18:40:35 +08:00
|
|
|
ib = kmalloc(sizeof(*ib), GFP_KERNEL);
|
|
|
|
if (!ib) {
|
|
|
|
iio_device_put(indio_dev);
|
2021-04-27 01:49:10 +08:00
|
|
|
clear_bit(IIO_BUSY_BIT_POS, &iio_dev_opaque->flags);
|
2021-02-15 18:40:35 +08:00
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
ib->indio_dev = indio_dev;
|
|
|
|
ib->buffer = indio_dev->buffer;
|
|
|
|
|
|
|
|
filp->private_data = ib;
|
2011-09-21 18:16:02 +08:00
|
|
|
|
2011-12-19 22:23:49 +08:00
|
|
|
return 0;
|
2011-08-30 19:32:47 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2011-09-21 18:15:57 +08:00
|
|
|
* iio_chrdev_release() - chrdev file close buffer access and ioctls
|
2015-07-24 21:16:19 +08:00
|
|
|
* @inode: Inode structure pointer for the char device
|
|
|
|
* @filp: File structure pointer for the char device
|
|
|
|
*
|
|
|
|
* Return: 0 for successful release
|
|
|
|
*/
|
2011-08-30 19:32:47 +08:00
|
|
|
static int iio_chrdev_release(struct inode *inode, struct file *filp)
|
|
|
|
{
|
2021-02-15 18:40:35 +08:00
|
|
|
struct iio_dev_buffer_pair *ib = filp->private_data;
|
2021-04-27 01:49:09 +08:00
|
|
|
struct iio_dev_opaque *iio_dev_opaque =
|
|
|
|
container_of(inode->i_cdev, struct iio_dev_opaque, chrdev);
|
|
|
|
struct iio_dev *indio_dev = &iio_dev_opaque->indio_dev;
|
2022-07-28 02:18:54 +08:00
|
|
|
|
2021-02-15 18:40:35 +08:00
|
|
|
kfree(ib);
|
2021-04-27 01:49:10 +08:00
|
|
|
clear_bit(IIO_BUSY_BIT_POS, &iio_dev_opaque->flags);
|
2013-09-19 04:02:00 +08:00
|
|
|
iio_device_put(indio_dev);
|
|
|
|
|
2011-08-30 19:32:47 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2020-09-24 16:41:55 +08:00
|
|
|
void iio_device_ioctl_handler_register(struct iio_dev *indio_dev,
|
|
|
|
struct iio_ioctl_handler *h)
|
|
|
|
{
|
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
|
|
|
|
|
|
|
list_add_tail(&h->entry, &iio_dev_opaque->ioctl_handlers);
|
|
|
|
}
|
|
|
|
|
|
|
|
void iio_device_ioctl_handler_unregister(struct iio_ioctl_handler *h)
|
|
|
|
{
|
|
|
|
list_del(&h->entry);
|
|
|
|
}
|
|
|
|
|
2011-08-30 19:32:47 +08:00
|
|
|
static long iio_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
|
|
|
|
{
|
2021-02-15 18:40:35 +08:00
|
|
|
struct iio_dev_buffer_pair *ib = filp->private_data;
|
|
|
|
struct iio_dev *indio_dev = ib->indio_dev;
|
2020-09-24 16:41:55 +08:00
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
|
|
|
struct iio_ioctl_handler *h;
|
|
|
|
int ret = -ENODEV;
|
|
|
|
|
2021-04-27 01:49:08 +08:00
|
|
|
mutex_lock(&iio_dev_opaque->info_exist_lock);
|
2011-08-30 19:32:47 +08:00
|
|
|
|
2020-09-24 16:41:55 +08:00
|
|
|
/**
|
|
|
|
* The NULL check here is required to prevent crashing when a device
|
|
|
|
* is being removed while userspace would still have open file handles
|
|
|
|
* to try to access this device.
|
|
|
|
*/
|
2013-10-04 19:06:00 +08:00
|
|
|
if (!indio_dev->info)
|
2020-09-24 16:41:55 +08:00
|
|
|
goto out_unlock;
|
|
|
|
|
|
|
|
list_for_each_entry(h, &iio_dev_opaque->ioctl_handlers, entry) {
|
|
|
|
ret = h->ioctl(indio_dev, filp, cmd, arg);
|
|
|
|
if (ret != IIO_IOCTL_UNHANDLED)
|
|
|
|
break;
|
2011-08-30 19:32:47 +08:00
|
|
|
}
|
2020-09-24 16:41:55 +08:00
|
|
|
|
2020-11-17 17:51:54 +08:00
|
|
|
if (ret == IIO_IOCTL_UNHANDLED)
|
2021-05-03 22:43:50 +08:00
|
|
|
ret = -ENODEV;
|
2020-11-17 17:51:54 +08:00
|
|
|
|
2020-09-24 16:41:55 +08:00
|
|
|
out_unlock:
|
2021-04-27 01:49:08 +08:00
|
|
|
mutex_unlock(&iio_dev_opaque->info_exist_lock);
|
2020-09-24 16:41:55 +08:00
|
|
|
|
|
|
|
return ret;
|
2011-08-30 19:32:47 +08:00
|
|
|
}
|
|
|
|
|
2011-09-21 18:15:57 +08:00
|
|
|
static const struct file_operations iio_buffer_fileops = {
|
2011-08-30 19:32:47 +08:00
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.llseek = noop_llseek,
|
2020-11-17 18:37:53 +08:00
|
|
|
.read = iio_buffer_read_outer_addr,
|
2021-10-07 16:00:30 +08:00
|
|
|
.write = iio_buffer_write_outer_addr,
|
2020-11-17 18:37:53 +08:00
|
|
|
.poll = iio_buffer_poll_addr,
|
2011-08-30 19:32:47 +08:00
|
|
|
.unlocked_ioctl = iio_ioctl,
|
2018-09-12 03:59:08 +08:00
|
|
|
.compat_ioctl = compat_ptr_ioctl,
|
2020-11-17 18:37:53 +08:00
|
|
|
.open = iio_chrdev_open,
|
|
|
|
.release = iio_chrdev_release,
|
2011-08-30 19:32:47 +08:00
|
|
|
};
|
|
|
|
|
iio: core: register chardev only if needed
We only need a chardev if we need to support buffers and/or events.
With this change, a chardev will be created only if an IIO buffer is
attached OR an event_interface is configured.
Otherwise, no chardev will be created, and the IIO device will get
registered with the 'device_add()' call.
Quite a lot of IIO devices don't really need a chardev, so this is a minor
improvement to the IIO core, as the IIO device will take up (slightly)
fewer resources.
In order to not create a chardev, we mostly just need to not initialize the
indio_dev->dev.devt field. If that is un-initialized, cdev_device_add()
behaves like device_add().
This change has a small chance of breaking some userspace ABI, because it
removes un-needed chardevs. While these chardevs (that are being removed)
have always been unusable, it is likely that some scripts may check their
existence (for whatever logic).
And we also hope that before opening these chardevs, userspace would have
already checked for some pre-conditions to make sure that opening these
chardevs makes sense.
For the most part, there is also the hope that it would be easier to change
userspace code than revert this. But in the case that reverting this is
required, it should be easy enough to do it.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20210215104043.91251-9-alexandru.ardelean@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-02-15 18:40:27 +08:00
|
|
|
static const struct file_operations iio_event_fileops = {
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.llseek = noop_llseek,
|
|
|
|
.unlocked_ioctl = iio_ioctl,
|
|
|
|
.compat_ioctl = compat_ptr_ioctl,
|
|
|
|
.open = iio_chrdev_open,
|
|
|
|
.release = iio_chrdev_release,
|
|
|
|
};
|
|
|
|
|
2014-12-29 17:37:48 +08:00
|
|
|
static int iio_check_unique_scan_index(struct iio_dev *indio_dev)
|
|
|
|
{
|
|
|
|
int i, j;
|
|
|
|
const struct iio_chan_spec *channels = indio_dev->channels;
|
|
|
|
|
|
|
|
if (!(indio_dev->modes & INDIO_ALL_BUFFER_MODES))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
for (i = 0; i < indio_dev->num_channels - 1; i++) {
|
|
|
|
if (channels[i].scan_index < 0)
|
|
|
|
continue;
|
|
|
|
for (j = i + 1; j < indio_dev->num_channels; j++)
|
|
|
|
if (channels[i].scan_index == channels[j].scan_index) {
|
|
|
|
dev_err(&indio_dev->dev,
|
|
|
|
"Duplicate scan index %d\n",
|
|
|
|
channels[i].scan_index);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2021-06-18 20:30:04 +08:00
|
|
|
static int iio_check_extended_name(const struct iio_dev *indio_dev)
|
|
|
|
{
|
|
|
|
unsigned int i;
|
|
|
|
|
|
|
|
if (!indio_dev->info->read_label)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
for (i = 0; i < indio_dev->num_channels; i++) {
|
|
|
|
if (indio_dev->channels[i].extend_name) {
|
|
|
|
dev_err(&indio_dev->dev,
|
|
|
|
"Cannot use labels and extend_name at the same time\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2012-03-01 17:51:04 +08:00
|
|
|
static const struct iio_buffer_setup_ops noop_ring_setup_ops;
|
|
|
|
|
2017-07-24 00:25:43 +08:00
|
|
|
int __iio_device_register(struct iio_dev *indio_dev, struct module *this_mod)
|
2009-08-19 01:06:19 +08:00
|
|
|
{
|
iio: core: register chardev only if needed
We only need a chardev if we need to support buffers and/or events.
With this change, a chardev will be created only if an IIO buffer is
attached OR an event_interface is configured.
Otherwise, no chardev will be created, and the IIO device will get
registered with the 'device_add()' call.
Quite a lot of IIO devices don't really need a chardev, so this is a minor
improvement to the IIO core, as the IIO device will take up (slightly)
fewer resources.
In order to not create a chardev, we mostly just need to not initialize the
indio_dev->dev.devt field. If that is un-initialized, cdev_device_add()
behaves like device_add().
This change has a small chance of breaking some userspace ABI, because it
removes un-needed chardevs. While these chardevs (that are being removed)
have always been unusable, it is likely that some scripts may check their
existence (for whatever logic).
And we also hope that before opening these chardevs, userspace would have
already checked for some pre-conditions to make sure that opening these
chardevs makes sense.
For the most part, there is also the hope that it would be easier to change
userspace code than revert this. But in the case that reverting this is
required, it should be easy enough to do it.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20210215104043.91251-9-alexandru.ardelean@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-02-15 18:40:27 +08:00
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
2022-04-14 02:02:02 +08:00
|
|
|
struct fwnode_handle *fwnode;
|
2009-08-19 01:06:19 +08:00
|
|
|
int ret;
|
|
|
|
|
2020-04-07 23:07:43 +08:00
|
|
|
if (!indio_dev->info)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2021-04-27 01:49:05 +08:00
|
|
|
iio_dev_opaque->driver_module = this_mod;
|
2013-02-08 01:09:00 +08:00
|
|
|
|
2022-04-14 02:02:02 +08:00
|
|
|
/* If the calling driver did not initialize firmware node, do it here */
|
|
|
|
if (dev_fwnode(&indio_dev->dev))
|
|
|
|
fwnode = dev_fwnode(&indio_dev->dev);
|
|
|
|
else
|
|
|
|
fwnode = dev_fwnode(indio_dev->dev.parent);
|
|
|
|
device_set_node(&indio_dev->dev, fwnode);
|
|
|
|
|
|
|
|
fwnode_property_read_string(fwnode, "label", &indio_dev->label);
|
2019-09-19 22:36:08 +08:00
|
|
|
|
2014-12-29 17:37:48 +08:00
|
|
|
ret = iio_check_unique_scan_index(indio_dev);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
2021-06-18 20:30:04 +08:00
|
|
|
ret = iio_check_extended_name(indio_dev);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
2019-06-18 23:54:40 +08:00
|
|
|
iio_device_register_debugfs(indio_dev);
|
2014-11-27 01:55:12 +08:00
|
|
|
|
2021-02-15 18:40:38 +08:00
|
|
|
ret = iio_buffers_alloc_sysfs_and_mask(indio_dev);
|
2014-11-27 01:55:12 +08:00
|
|
|
if (ret) {
|
|
|
|
dev_err(indio_dev->dev.parent,
|
|
|
|
"Failed to create buffer sysfs interfaces\n");
|
|
|
|
goto error_unreg_debugfs;
|
|
|
|
}
|
|
|
|
|
2011-10-07 00:14:35 +08:00
|
|
|
ret = iio_device_register_sysfs(indio_dev);
|
2009-08-19 01:06:19 +08:00
|
|
|
if (ret) {
|
2011-10-07 00:14:35 +08:00
|
|
|
dev_err(indio_dev->dev.parent,
|
2009-08-19 01:06:19 +08:00
|
|
|
"Failed to register sysfs interfaces\n");
|
2014-11-27 01:55:12 +08:00
|
|
|
goto error_buffer_free_sysfs;
|
2009-08-19 01:06:19 +08:00
|
|
|
}
|
2011-10-07 00:14:35 +08:00
|
|
|
ret = iio_device_register_eventset(indio_dev);
|
2009-08-19 01:06:19 +08:00
|
|
|
if (ret) {
|
2011-10-07 00:14:35 +08:00
|
|
|
dev_err(indio_dev->dev.parent,
|
2010-04-30 01:27:31 +08:00
|
|
|
"Failed to register event set\n");
|
2009-08-19 01:06:19 +08:00
|
|
|
goto error_free_sysfs;
|
|
|
|
}
|
2017-04-27 21:29:15 +08:00
|
|
|
if (indio_dev->modes & INDIO_ALL_TRIGGERED_MODES)
|
2011-10-07 00:14:35 +08:00
|
|
|
iio_device_register_trigger_consumer(indio_dev);
|
2009-08-19 01:06:19 +08:00
|
|
|
|
2012-03-01 17:51:04 +08:00
|
|
|
if ((indio_dev->modes & INDIO_ALL_BUFFER_MODES) &&
|
|
|
|
indio_dev->setup_ops == NULL)
|
|
|
|
indio_dev->setup_ops = &noop_ring_setup_ops;
|
|
|
|
|
2021-02-15 18:40:38 +08:00
|
|
|
if (iio_dev_opaque->attached_buffers_cnt)
|
2021-04-27 01:49:09 +08:00
|
|
|
cdev_init(&iio_dev_opaque->chrdev, &iio_buffer_fileops);
|
iio: core: register chardev only if needed
We only need a chardev if we need to support buffers and/or events.
With this change, a chardev will be created only if an IIO buffer is
attached OR an event_interface is configured.
Otherwise, no chardev will be created, and the IIO device will get
registered with the 'device_add()' call.
Quite a lot of IIO devices don't really need a chardev, so this is a minor
improvement to the IIO core, as the IIO device will take up (slightly)
fewer resources.
In order to not create a chardev, we mostly just need to not initialize the
indio_dev->dev.devt field. If that is un-initialized, cdev_device_add()
behaves like device_add().
This change has a small chance of breaking some userspace ABI, because it
removes un-needed chardevs. While these chardevs (that are being removed)
have always been unusable, it is likely that some scripts may check their
existence (for whatever logic).
And we also hope that before opening these chardevs, userspace would have
already checked for some pre-conditions to make sure that opening these
chardevs makes sense.
For the most part, there is also the hope that it would be easier to change
userspace code than revert this. But in the case that reverting this is
required, it should be easy enough to do it.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20210215104043.91251-9-alexandru.ardelean@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-02-15 18:40:27 +08:00
|
|
|
else if (iio_dev_opaque->event_interface)
|
2021-04-27 01:49:09 +08:00
|
|
|
cdev_init(&iio_dev_opaque->chrdev, &iio_event_fileops);
|
2017-07-24 00:25:43 +08:00
|
|
|
|
2021-02-15 18:40:38 +08:00
|
|
|
if (iio_dev_opaque->attached_buffers_cnt || iio_dev_opaque->event_interface) {
|
2021-04-27 01:49:03 +08:00
|
|
|
indio_dev->dev.devt = MKDEV(MAJOR(iio_devt), iio_dev_opaque->id);
|
2021-04-27 01:49:09 +08:00
|
|
|
iio_dev_opaque->chrdev.owner = this_mod;
|
iio: core: register chardev only if needed
We only need a chardev if we need to support buffers and/or events.
With this change, a chardev will be created only if an IIO buffer is
attached OR an event_interface is configured.
Otherwise, no chardev will be created, and the IIO device will get
registered with the 'device_add()' call.
Quite a lot of IIO devices don't really need a chardev, so this is a minor
improvement to the IIO core, as the IIO device will take up (slightly)
fewer resources.
In order to not create a chardev, we mostly just need to not initialize the
indio_dev->dev.devt field. If that is un-initialized, cdev_device_add()
behaves like device_add().
This change has a small chance of breaking some userspace ABI, because it
removes un-needed chardevs. While these chardevs (that are being removed)
have always been unusable, it is likely that some scripts may check their
existence (for whatever logic).
And we also hope that before opening these chardevs, userspace would have
already checked for some pre-conditions to make sure that opening these
chardevs makes sense.
For the most part, there is also the hope that it would be easier to change
userspace code than revert this. But in the case that reverting this is
required, it should be easy enough to do it.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20210215104043.91251-9-alexandru.ardelean@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-02-15 18:40:27 +08:00
|
|
|
}
|
2009-08-19 01:06:19 +08:00
|
|
|
|
2021-02-15 18:40:29 +08:00
|
|
|
/* assign device groups now; they should be all registered now */
|
|
|
|
indio_dev->dev.groups = iio_dev_opaque->groups;
|
|
|
|
|
2021-04-27 01:49:09 +08:00
|
|
|
ret = cdev_device_add(&iio_dev_opaque->chrdev, &indio_dev->dev);
|
2013-09-19 04:02:00 +08:00
|
|
|
if (ret < 0)
|
2017-03-18 02:48:17 +08:00
|
|
|
goto error_unreg_eventset;
|
2013-09-19 04:02:00 +08:00
|
|
|
|
|
|
|
return 0;
|
2017-03-18 02:48:17 +08:00
|
|
|
|
2011-09-03 00:14:40 +08:00
|
|
|
error_unreg_eventset:
|
2011-10-07 00:14:35 +08:00
|
|
|
iio_device_unregister_eventset(indio_dev);
|
2011-09-03 00:14:40 +08:00
|
|
|
error_free_sysfs:
|
2011-10-07 00:14:35 +08:00
|
|
|
iio_device_unregister_sysfs(indio_dev);
|
2014-11-27 01:55:12 +08:00
|
|
|
error_buffer_free_sysfs:
|
2021-02-15 18:40:38 +08:00
|
|
|
iio_buffers_free_sysfs_and_mask(indio_dev);
|
2012-03-01 17:51:03 +08:00
|
|
|
error_unreg_debugfs:
|
|
|
|
iio_device_unregister_debugfs(indio_dev);
|
2009-08-19 01:06:19 +08:00
|
|
|
return ret;
|
|
|
|
}
|
2017-07-24 00:25:43 +08:00
|
|
|
EXPORT_SYMBOL(__iio_device_register);
|
2009-08-19 01:06:19 +08:00
|
|
|
|
2013-10-29 19:39:00 +08:00
|
|
|
/**
|
|
|
|
* iio_device_unregister() - unregister a device from the IIO subsystem
|
|
|
|
* @indio_dev: Device structure representing the device.
|
|
|
|
**/
|
2011-10-07 00:14:35 +08:00
|
|
|
void iio_device_unregister(struct iio_dev *indio_dev)
|
2009-08-19 01:06:19 +08:00
|
|
|
{
|
2021-04-27 01:49:09 +08:00
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
|
|
|
|
|
|
|
cdev_device_del(&iio_dev_opaque->chrdev, &indio_dev->dev);
|
2013-09-19 04:02:00 +08:00
|
|
|
|
2021-04-27 01:49:08 +08:00
|
|
|
mutex_lock(&iio_dev_opaque->info_exist_lock);
|
2019-03-25 21:01:23 +08:00
|
|
|
|
2013-09-21 23:21:00 +08:00
|
|
|
iio_device_unregister_debugfs(indio_dev);
|
2013-09-19 04:02:00 +08:00
|
|
|
|
2013-09-19 04:02:00 +08:00
|
|
|
iio_disable_all_buffers(indio_dev);
|
|
|
|
|
2012-02-16 03:48:00 +08:00
|
|
|
indio_dev->info = NULL;
|
2013-10-04 19:07:00 +08:00
|
|
|
|
|
|
|
iio_device_wakeup_eventset(indio_dev);
|
|
|
|
iio_buffer_wakeup_poll(indio_dev);
|
|
|
|
|
2021-04-27 01:49:08 +08:00
|
|
|
mutex_unlock(&iio_dev_opaque->info_exist_lock);
|
2014-11-27 01:55:12 +08:00
|
|
|
|
2021-02-15 18:40:38 +08:00
|
|
|
iio_buffers_free_sysfs_and_mask(indio_dev);
|
2009-08-19 01:06:19 +08:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(iio_device_unregister);
|
2013-10-29 19:39:00 +08:00
|
|
|
|
2021-04-08 19:38:14 +08:00
|
|
|
static void devm_iio_device_unreg(void *indio_dev)
|
2013-10-29 19:39:00 +08:00
|
|
|
{
|
2021-04-08 19:38:14 +08:00
|
|
|
iio_device_unregister(indio_dev);
|
2013-10-29 19:39:00 +08:00
|
|
|
}
|
|
|
|
|
2017-07-24 00:25:43 +08:00
|
|
|
int __devm_iio_device_register(struct device *dev, struct iio_dev *indio_dev,
|
|
|
|
struct module *this_mod)
|
2013-10-29 19:39:00 +08:00
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
2017-07-24 00:25:43 +08:00
|
|
|
ret = __iio_device_register(indio_dev, this_mod);
|
2021-04-08 19:38:14 +08:00
|
|
|
if (ret)
|
|
|
|
return ret;
|
2013-10-29 19:39:00 +08:00
|
|
|
|
2021-04-08 19:38:14 +08:00
|
|
|
return devm_add_action_or_reset(dev, devm_iio_device_unreg, indio_dev);
|
2013-10-29 19:39:00 +08:00
|
|
|
}
|
2017-07-24 00:25:43 +08:00
|
|
|
EXPORT_SYMBOL_GPL(__devm_iio_device_register);
|
2013-10-29 19:39:00 +08:00
|
|
|
|
2016-03-10 03:30:12 +08:00
|
|
|
/**
|
|
|
|
* iio_device_claim_direct_mode - Keep device in direct mode
|
|
|
|
* @indio_dev: the iio_dev associated with the device
|
|
|
|
*
|
|
|
|
* If the device is in direct mode it is guaranteed to stay
|
|
|
|
* that way until iio_device_release_direct_mode() is called.
|
|
|
|
*
|
|
|
|
* Use with iio_device_release_direct_mode()
|
|
|
|
*
|
|
|
|
* Returns: 0 on success, -EBUSY on failure
|
|
|
|
*/
|
|
|
|
int iio_device_claim_direct_mode(struct iio_dev *indio_dev)
|
|
|
|
{
|
2022-10-12 23:16:20 +08:00
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
|
|
|
|
|
|
|
mutex_lock(&iio_dev_opaque->mlock);
|
2016-03-10 03:30:12 +08:00
|
|
|
|
|
|
|
if (iio_buffer_enabled(indio_dev)) {
|
2022-10-12 23:16:20 +08:00
|
|
|
mutex_unlock(&iio_dev_opaque->mlock);
|
2016-03-10 03:30:12 +08:00
|
|
|
return -EBUSY;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(iio_device_claim_direct_mode);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* iio_device_release_direct_mode - releases claim on direct mode
|
|
|
|
* @indio_dev: the iio_dev associated with the device
|
|
|
|
*
|
|
|
|
* Release the claim. Device is no longer guaranteed to stay
|
|
|
|
* in direct mode.
|
|
|
|
*
|
|
|
|
* Use with iio_device_claim_direct_mode()
|
|
|
|
*/
|
|
|
|
void iio_device_release_direct_mode(struct iio_dev *indio_dev)
|
|
|
|
{
|
2022-10-12 23:16:20 +08:00
|
|
|
mutex_unlock(&to_iio_dev_opaque(indio_dev)->mlock);
|
2016-03-10 03:30:12 +08:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(iio_device_release_direct_mode);
|
|
|
|
|
2022-10-12 23:16:17 +08:00
|
|
|
/**
|
|
|
|
* iio_device_claim_buffer_mode - Keep device in buffer mode
|
|
|
|
* @indio_dev: the iio_dev associated with the device
|
|
|
|
*
|
|
|
|
* If the device is in buffer mode it is guaranteed to stay
|
|
|
|
* that way until iio_device_release_buffer_mode() is called.
|
|
|
|
*
|
|
|
|
* Use with iio_device_release_buffer_mode().
|
|
|
|
*
|
|
|
|
* Returns: 0 on success, -EBUSY on failure.
|
|
|
|
*/
|
|
|
|
int iio_device_claim_buffer_mode(struct iio_dev *indio_dev)
|
|
|
|
{
|
2022-10-12 23:16:20 +08:00
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
|
|
|
|
|
|
|
mutex_lock(&iio_dev_opaque->mlock);
|
2022-10-12 23:16:17 +08:00
|
|
|
|
|
|
|
if (iio_buffer_enabled(indio_dev))
|
|
|
|
return 0;
|
|
|
|
|
2022-10-12 23:16:20 +08:00
|
|
|
mutex_unlock(&iio_dev_opaque->mlock);
|
2022-10-12 23:16:17 +08:00
|
|
|
return -EBUSY;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(iio_device_claim_buffer_mode);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* iio_device_release_buffer_mode - releases claim on buffer mode
|
|
|
|
* @indio_dev: the iio_dev associated with the device
|
|
|
|
*
|
|
|
|
* Release the claim. Device is no longer guaranteed to stay
|
|
|
|
* in buffer mode.
|
|
|
|
*
|
|
|
|
* Use with iio_device_claim_buffer_mode().
|
|
|
|
*/
|
|
|
|
void iio_device_release_buffer_mode(struct iio_dev *indio_dev)
|
|
|
|
{
|
2022-10-12 23:16:20 +08:00
|
|
|
mutex_unlock(&to_iio_dev_opaque(indio_dev)->mlock);
|
2022-10-12 23:16:17 +08:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(iio_device_release_buffer_mode);
|
|
|
|
|
2022-02-07 22:38:37 +08:00
|
|
|
/**
|
|
|
|
* iio_device_get_current_mode() - helper function providing read-only access to
|
2022-02-07 22:38:38 +08:00
|
|
|
* the opaque @currentmode variable
|
2022-02-07 22:38:37 +08:00
|
|
|
* @indio_dev: IIO device structure for device
|
|
|
|
*/
|
|
|
|
int iio_device_get_current_mode(struct iio_dev *indio_dev)
|
|
|
|
{
|
2022-02-07 22:38:38 +08:00
|
|
|
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
|
|
|
|
|
|
|
|
return iio_dev_opaque->currentmode;
|
2022-02-07 22:38:37 +08:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(iio_device_get_current_mode);
|
|
|
|
|
2009-08-19 01:06:19 +08:00
|
|
|
subsys_initcall(iio_init);
|
|
|
|
module_exit(iio_exit);
|
|
|
|
|
2012-09-03 04:27:56 +08:00
|
|
|
MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>");
|
2009-08-19 01:06:19 +08:00
|
|
|
MODULE_DESCRIPTION("Industrial I/O core");
|
|
|
|
MODULE_LICENSE("GPL");
|