Commit Graph

937 Commits

Author SHA1 Message Date
Dragos Bogdan fccfb9ce70 iio: ad_sigma_delta: select channel when reading register
The desired channel has to be selected in order to correctly fill the
buffer with the corresponding data.
The `ad_sd_write_reg()` already does this, but for the
`ad_sd_read_reg_raw()` this was omitted.

Fixes: af3008485e ("iio:adc: Add common code for ADI Sigma Delta devices")
Signed-off-by: Dragos Bogdan <dragos.bogdan@analog.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-03-24 17:51:03 +00:00
Sven Van Asbroeck 2e4b88f739 iio: adc: xilinx: prevent touching unclocked h/w on remove
In remove, the clock is disabled before canceling the
delayed work. This means that the delayed work may be
touching unclocked hardware.

Fix by disabling the clock after the delayed work is
fully canceled. This is consistent with the probe error
path order.

Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-03-16 15:49:56 +00:00
Sven Van Asbroeck 862e4644fd iio: adc: xilinx: fix potential use-after-free on probe
If probe errors out after request_irq(), its error path
does not explicitly cancel the delayed work, which may
have been scheduled by the interrupt handler.

This means the delayed work may still be running when
the core frees the private structure (struct xadc).
This is a potential use-after-free.

Fix by inserting cancel_delayed_work_sync() in the probe
error path.

Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-03-16 15:48:51 +00:00
Sven Van Asbroeck 62039b6aef iio: adc: xilinx: fix potential use-after-free on remove
When cancel_delayed_work() returns, the delayed work may still
be running. This means that the core could potentially free
the private structure (struct xadc) while the delayed work
is still using it. This is a potential use-after-free.

Fix by calling cancel_delayed_work_sync(), which waits for
any residual work to finish before returning.

Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-03-16 15:48:30 +00:00
Georg Ottinger 09c6bdee51 iio: adc: at91: disable adc channel interrupt in timeout case
Having a brief look at at91_adc_read_raw() it is obvious that in the case
of a timeout the setting of AT91_ADC_CHDR and AT91_ADC_IDR registers is
omitted. If 2 different channels are queried we can end up with a
situation where two interrupts are enabled, but only one interrupt is
cleared in the interrupt handler. Resulting in a interrupt loop and a
system hang.

Signed-off-by: Georg Ottinger <g.ottinger@abatec.at>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-03-09 16:55:07 +00:00
Linus Torvalds cf2e8c544c - New Drivers
- Add STMPE ADC Input driver
    - Add STMicroelectronics STPMIC1 Parent driver
    - Add STMicroelectronics STPMIC1 OnKey Misc driver
    - Add STMicroelectronics STPMIC1 Watchdog driver
    - Add Cirrus Logic Lochnagar Parent driver
    - Add TQ-Systems TQMX86 Parent driver
 
  - New Device Support
    - Add support for ADC to STMPE
 
  - New (or moved) Functionality
    - Move Lightbar functionality to its own driver; cros_ec_lightbar
    - Move VBC functionality to its own driver; cros_ec_vbc
    - Move VBC functionality to its own driver; cros_ec_vbc
    - Move DebugFS functionality to its own driver; cros_ec_debugfs
    - Move SYSFS functionality to its own driver; cros_ec_sysfs
    - Add support for input voltage options; tps65218
 
  - Fix-ups
    - Use devm_* managed resources; cros_ec
    - Device Tree documentation; stmpe, aspeed-lpc, lochnagar
    - Trivial Clean-ups; stmpe
    - Rip out broken modular code; aat2870-core, adp5520, as3711,
          db8500-prcmu, htc-i2cpld, max8925-core, rc5t583, sta2x11-mfd,
 	 syscon, tps65090, tps65910, tps68470 tps80031, wm831x-spi,
 	 wm831x-i2c, wm831x-core, wm8350-i2c, wm8350-core, wm8400-core
    - Kconfig fixups; INTEL_SOC_PMIC
    - Improve error path; sm501, sec-core
    - Use struct_size() helper; sm501
    - Constify; at91-usart
    - Use pointers instead of copying data; at91-usart
    - Deliver proper return value; cros_ec_dev
    - Trivial formatting/whitespace; sec-core
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Merge tag 'mfd-next-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd

Pull MFD updates from Lee Jones:
 "New Drivers:
   - Add STMPE ADC Input driver
   - Add STMicroelectronics STPMIC1 Parent driver
   - Add STMicroelectronics STPMIC1 OnKey Misc driver
   - Add STMicroelectronics STPMIC1 Watchdog driver
   - Add Cirrus Logic Lochnagar Parent driver
   - Add TQ-Systems TQMX86 Parent driver

  New Device Support:
   - Add support for ADC to STMPE

  New (or moved) Functionality:
   - Move Lightbar functionality to its own driver; cros_ec_lightbar
   - Move VBC functionality to its own driver; cros_ec_vbc
   - Move VBC functionality to its own driver; cros_ec_vbc
   - Move DebugFS functionality to its own driver; cros_ec_debugfs
   - Move SYSFS functionality to its own driver; cros_ec_sysfs
   - Add support for input voltage options; tps65218

  Fixes:
   - Use devm_* managed resources; cros_ec
   - Device Tree documentation; stmpe, aspeed-lpc, lochnagar
   - Trivial Clean-ups; stmpe
   - Rip out broken modular code; aat2870-core, adp5520, as3711,
         db8500-prcmu, htc-i2cpld, max8925-core, rc5t583, sta2x11-mfd,
	 syscon, tps65090, tps65910, tps68470 tps80031, wm831x-spi,
	 wm831x-i2c, wm831x-core, wm8350-i2c, wm8350-core, wm8400-core
   - Kconfig fixups; INTEL_SOC_PMIC
   - Improve error path; sm501, sec-core
   - Use struct_size() helper; sm501
   - Constify; at91-usart
   - Use pointers instead of copying data; at91-usart
   - Deliver proper return value; cros_ec_dev
   - Trivial formatting/whitespace; sec-core"

* tag 'mfd-next-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (53 commits)
  mfd: mxs-lradc: Mark expected switch fall-through
  mfd: sec-core: Cleanup formatting to a consistent style
  mfd: tqmx86: IO controller with I2C, Wachdog and GPIO
  mfd: intel-lpss: Move linux/pm.h to the local header
  mfd: cros_ec_dev: Return number of bytes read with CROS_EC_DEV_IOCRDMEM
  mfd: tps68470: Drop unused MODULE_DEVICE_TABLE
  mfd: at91-usart: No need to copy mfd_cell in probe
  mfd: at91-usart: Constify at91_usart_spi_subdev and at91_usart_serial_subdev
  mfd: lochnagar: Add support for the Cirrus Logic Lochnagar
  mfd: lochnagar: Add initial binding documentation
  dt-bindings: mfd: aspeed-lpc: Make parameter optional
  mfd: sec-core: Return gracefully instead of BUG() if device cannot match
  mfd: sm501: Use struct_size() in devm_kzalloc()
  mfd: sm501: Fix potential NULL pointer dereference
  mfd: Kconfig: Fix I2C_DESIGNWARE_PLATFORM dependencies
  mfd: tps65218.c: Add input voltage options
  mfd: wm8400-core: Make it explicitly non-modular
  mfd: wm8350-core: Drop unused module infrastructure from non-modular code
  mfd: wm8350-i2c: Make it explicitly non-modular
  mfd: wm831x-core: Drop unused module infrastructure from non-modular code
  ...
2019-03-08 10:02:58 -08:00
Linus Torvalds e266ca36da Staging/IIO patches for 5.1-rc1
Here is the big staging/iio driver pull request for 5.1-rc1.
 
 Lots of good IIO driver updates and cleanups in here as always.
 Combined with the removal of the xgifb driver, we have a net "loss" of
 over 9000 lines in the pull request, always a nice thing.
 
 As the outreachy application process is currently happening, there are
 loads of tiny checkpatch cleanup fixes all over the staging tree, which
 accounts for the majority of the fixups.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging/IIO updates from Greg KH:
 "Here is the big staging/iio driver pull request for 5.1-rc1.

  Lots of good IIO driver updates and cleanups in here as always.
  Combined with the removal of the xgifb driver, we have a net "loss" of
  over 9000 lines in the pull request, always a nice thing.

  As the outreachy application process is currently happening, there are
  loads of tiny checkpatch cleanup fixes all over the staging tree,
  which accounts for the majority of the fixups"

* tag 'staging-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (341 commits)
  staging: mt7621-dma: remove license boilerplate text
  staging: mt7621-dma: add SPDX GPL-2.0+ license identifier
  Staging: ks7010: Replace typecast to int
  Staging: vt6655: Align a static function declaration
  staging: speakup: fix line over 80 characters.
  staging: mt7621-eth: Remove license boilerplate text
  staging: mt7621-eth: Add SPDX license identifier
  staging: ks7010: removed custom Michael MIC implementation.
  staging: rtl8192e: Fix space and suspect issue
  Staging: vt6655: Modify comment style of SPDX License Identifier
  Staging: vt6655: Modify comment style for SPDX-License-Identifier
  Staging: vt6655: Align a function declaration
  Staging: vt6655: Alignment of function declaration
  staging: rtl8712: Fix indentation issue
  staging: wilc1000: fix incorrent type in initializer
  staging: rtl8188eu: remove unused P2P_PRIVATE_IOCTL_SET_LEN
  staging: rtl8188eu: remove unused enum P2P_PROTO_WK_ID
  staging: rtl8723bs: Remove duplicated include from drv_types.h
  Staging: vt6655: Alignment should match open parenthesis
  staging: erofs: fix mis-acted TAIL merging behavior
  ...
2019-03-06 16:29:27 -08:00
Linus Torvalds e0f0ae838a iio: adc: fix warning in Qualcomm PM8xxx HK/XOADC driver
The pm8xxx_get_channel() implementation is unclear, and causes gcc to
suddenly generate odd warnings.  The trigger for the warning (at least
for me) was the entirely unrelated commit 79a4e91d1b ("device.h: Add
__cold to dev_<level> logging functions"), which apparently changes gcc
code generation in the caller function enough to cause this:

  drivers/iio/adc/qcom-pm8xxx-xoadc.c: In function ‘pm8xxx_xoadc_probe’:
  drivers/iio/adc/qcom-pm8xxx-xoadc.c:633:8: warning: ‘ch’ may be used uninitialized in this function [-Wmaybe-uninitialized]
    ret = pm8xxx_read_channel_rsv(adc, ch, AMUX_RSV4,
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
             &read_nomux_rsv4, true);
             ~~~~~~~~~~~~~~~~~~~~~~~
  drivers/iio/adc/qcom-pm8xxx-xoadc.c:426:27: note: ‘ch’ was declared here
    struct pm8xxx_chan_info *ch;
                             ^~

because gcc for some reason then isn't able to see that the termination
condition for the "for( )" loop in that function is also the condition
for returning NULL.

So it's not _actually_ uninitialized, but the function is admittedly
just unnecessarily oddly written.

Simplify and clarify the function, making gcc also see that it always
returns a valid initialized value.

Cc: Joe Perches <joe@perches.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Andy Gross <andy.gross@linaro.org>
Cc: David Brown <david.brown@linaro.org>
Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Hartmut Knaack <knaack.h@gmx.de>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-03-06 15:41:29 -08:00
Greg Kroah-Hartman 277c8e8b81 Second set of new device support, features and cleanup for IIO in the 5.1 cycle.
There are a few late breaking fixes in here that weren't worth trying to
 rush into 5.0 as they have been with us for quite a while.
 
 New device support
 * ad7476
   - add support for TI ADS786X parts that are compatible with this Analog
     Devices driver. Good to see some simple devices are so similar.
 * Ingenic jz47xx SoC ADCs
   - new driver and bindings
 * Plantower PMS7003 partical sensor
   - new driver and bindings including vendor prefix.
 * TI DAC7612
   - new driver and bindings for this dual DAC.
 
 New features
 * ad7768-1
   - Sampling frequency control
 * bmi160
   - Data ready trigger support, including open-drain dt binding.
 
 Cleanup / minor fixes.
 * Analog Device DACs
   - Fix some inconsistent licenses.  These are only ones where there were
     two different license marked in the same file, and hence were previously
     unclear.
 * ads124s08
   - Spelling fix.
 * adxl345
   - Parameter alignement tidy up.
 * bmi160
   - SPDX
   - correct a note on the types of supported interrupts which was too strict.
   - use iio_pollfunc_store_time to grab an earlier timestamp.
   - use if (ret) instead of if (ret < 0) to be consistent whilst simplifying
     some handling where ret was effectively getting written to 0 even though
     it was always already 0.
 * exynos_adc
   - Fix a null pointer dereference on unbind.
   - Fix number of channels on Exynos4x12 devices to be 4 rather than 8.
 * lpc32xx-adc
   - Move DT bindings doc out of staging. Oops, I missed this one when
     moving the driver.
   - SPDX.
 * npcm-adc
   - drop documentation of reset node as going to be done differently.
     It's a new driver this cycle so no need to support the previous
     binding going forwards.
 * sps30
   - Fix an issue with a loop timeout test that meant it would never identify
     a timeout.
   - Mark deliberate switch fall throughs.
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Merge tag 'iio-for-5.1b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

Second set of new device support, features and cleanup for IIO in the 5.1 cycle.

There are a few late breaking fixes in here that weren't worth trying to
rush into 5.0 as they have been with us for quite a while.

New device support
* ad7476
  - add support for TI ADS786X parts that are compatible with this Analog
    Devices driver. Good to see some simple devices are so similar.
* Ingenic jz47xx SoC ADCs
  - new driver and bindings
* Plantower PMS7003 partical sensor
  - new driver and bindings including vendor prefix.
* TI DAC7612
  - new driver and bindings for this dual DAC.

New features
* ad7768-1
  - Sampling frequency control
* bmi160
  - Data ready trigger support, including open-drain dt binding.

Cleanup / minor fixes.
* Analog Device DACs
  - Fix some inconsistent licenses.  These are only ones where there were
    two different license marked in the same file, and hence were previously
    unclear.
* ads124s08
  - Spelling fix.
* adxl345
  - Parameter alignement tidy up.
* bmi160
  - SPDX
  - correct a note on the types of supported interrupts which was too strict.
  - use iio_pollfunc_store_time to grab an earlier timestamp.
  - use if (ret) instead of if (ret < 0) to be consistent whilst simplifying
    some handling where ret was effectively getting written to 0 even though
    it was always already 0.
* exynos_adc
  - Fix a null pointer dereference on unbind.
  - Fix number of channels on Exynos4x12 devices to be 4 rather than 8.
* lpc32xx-adc
  - Move DT bindings doc out of staging. Oops, I missed this one when
    moving the driver.
  - SPDX.
* npcm-adc
  - drop documentation of reset node as going to be done differently.
    It's a new driver this cycle so no need to support the previous
    binding going forwards.
* sps30
  - Fix an issue with a loop timeout test that meant it would never identify
    a timeout.
  - Mark deliberate switch fall throughs.

* tag 'iio-for-5.1b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (26 commits)
  iio: adc: exynos-adc: Use proper number of channels for Exynos4x12
  dt-binding: iio: remove rst node from NPCM ADC document
  dt-bindings: iio: chemical: pms7003: add device tree support
  dt-bindings: add Plantower to the vendor prefixes
  iio: chemical: add support for Plantower PMS7003 sensor
  iio:chemical:sps30 Supress some switch fallthrough warnings.
  iio:adc:lpc32xx use SPDX-License-Identifier
  dt-bindings: iio: adc: move lpc32xx-adc out of staging
  iio: adc: ads124s08: fix spelling mistake "converions" -> "conversions"
  iio: adc: exynos-adc: Fix NULL pointer exception on unbind
  iio: chemical: sps30: fix a loop timeout test
  iio:accel:adxl345: Change alignment to match paranthesis
  iio:dac:dac7612: device tree bindings
  iio:dac:ti-dac7612: Add driver for Texas Instruments DAC7612
  iio: adc: ad7476: Add support for TI ADS786X ADCs
  iio: adc: ad7768-1: Add support for setting the sampling frequency
  drivers: iio: dac: Fix wrong license for ADI drivers
  IIO: add Ingenic JZ47xx ADC driver.
  dt-bindings: iio/adc: Add bindings for Ingenic JZ47xx SoCs ADC.
  dt-bindings: iio/adc: Add docs for Ingenic JZ47xx SoCs ADC.
  ...
2019-02-13 08:24:50 +01:00
Krzysztof Kozlowski 103cda6a3b iio: adc: exynos-adc: Use proper number of channels for Exynos4x12
Exynos4212 and Exynos4412 have only four ADC channels so using
"samsung,exynos-adc-v1" compatible (for eight channels ADCv1) on them is
wrong.  Add a new compatible for Exynos4x12.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-02-12 20:56:00 +00:00
Greg Kroah-Hartman 3b6effbc38 Merge 5.0-rc6 into staging-next
We need the staging fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-02-11 09:25:01 +01:00
Gregory CLEMENT 4305834936 iio:adc:lpc32xx use SPDX-License-Identifier
Convert the driver to SPDX license description which allow removing
several lines in the file.

Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-02-09 18:46:03 +00:00
Colin Ian King fc4e0c97d1 iio: adc: ads124s08: fix spelling mistake "converions" -> "conversions"
There is a spelling mistake in several dev_err messages. Fix these.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-02-09 18:46:03 +00:00
Krzysztof Kozlowski 2ea8bab4dd iio: adc: exynos-adc: Fix NULL pointer exception on unbind
Fix NULL pointer exception on device unbind when device tree does not
contain "has-touchscreen" property.  In such case the input device is
not registered so it should not be unregistered.

    $ echo "12d10000.adc" > /sys/bus/platform/drivers/exynos-adc/unbind

    Unable to handle kernel NULL pointer dereference at virtual address 00000474
    ...
    (input_unregister_device) from [<c0772060>] (exynos_adc_remove+0x20/0x80)
    (exynos_adc_remove) from [<c0587d5c>] (platform_drv_remove+0x20/0x40)
    (platform_drv_remove) from [<c05860f0>] (device_release_driver_internal+0xdc/0x1ac)
    (device_release_driver_internal) from [<c0583ecc>] (unbind_store+0x60/0xd4)
    (unbind_store) from [<c031b89c>] (kernfs_fop_write+0x100/0x1e0)
    (kernfs_fop_write) from [<c029709c>] (__vfs_write+0x2c/0x17c)
    (__vfs_write) from [<c0297374>] (vfs_write+0xa4/0x184)
    (vfs_write) from [<c0297594>] (ksys_write+0x4c/0xac)
    (ksys_write) from [<c0101000>] (ret_fast_syscall+0x0/0x28)

Fixes: 2bb8ad9b44 ("iio: exynos-adc: add experimental touchscreen support")
Cc: <stable@vger.kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-02-09 18:46:03 +00:00
Ricardo Ribalda Delgado 77c5a7f5c1 iio: adc: ad7476: Add support for TI ADS786X ADCs
Add support for Texas Instruments ADS7866, ADS7867 and ADS7868
8/10/12 bit Single channel ADC.

Datasheet: http://www.ti.com/lit/ds/symlink/ads7868.pdf

Signed-off-by: Ricardo Ribalda Delgado <ricardo@ribalda.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-02-09 18:46:02 +00:00
Stefan Popa e9517dffd1 iio: adc: ad7768-1: Add support for setting the sampling frequency
The AD7768-1 core ADC receives a master clock signal (MCLK). The MCLK
frequency combined with the MCLK division and the digital filter
decimation rates, determines the sampling frequency. Along with
MCLK_DIV, the power mode is also configured according to datasheet
recommendations.

From user space, available sampling frequencies can be read. However,
it is not required for an exact value to be entered, since the driver
will look for the closest available match.

When the device configuration changes (for example, if the filter
decimation rate changes), a SYNC_IN pulse is required.

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-02-09 18:46:01 +00:00
Artur Rojek 1a78daea10 IIO: add Ingenic JZ47xx ADC driver.
Add an IIO driver for the ADC hardware present on Ingenic JZ47xx SoCs.

Signed-off-by: Artur Rojek <contact@artur-rojek.eu>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-02-09 18:46:01 +00:00
Greg Kroah-Hartman 1dcc3ed4a7 First set of new device support, features and cleanup for IIO in the 5.1 cycle
A number of interesting new devices supported plus a good set of staging
 cleanup including one graduation and one drop.
 
 New device support
 * ad56886
   - Add support for AD5674R/AD5679R with some minor driver changes to support
     more channels.
 * ad7768
   - New driver and dt bindings for this 24 bit ADC.
 * max44009
   - New driver and dt bindings for this ambient light sensor.
 * mpu6050
   - Support the ICM 20602 IMU. Minor tweaks due to slightly different
     register map.
 * NPCM adc
   - New driver and dt bindings for this BMC ADC.
 * Sensiron SGP30
   - Modifiers for ethanol and H2.
   - New driver and dt bindings.
   - Follow patch added self cleaning support.
 * Sensiron SPS30
   - New channel type for mass concentration.
   - New driver and bindings.
   - Minor tidy up patch followed (drop fmt specifier as unused)
 * st_pressure
   - lps22hh support. ID plus information structures and dt bindings.
 * ti-ads124s08
   - Add binding doc and driver.
 
 Staging graduations
 * ad7606 driver and bindings.
 
 Staging drops
 * ad7152 CDC driver dropped.  This part is near EoL and no one is known
   to be using it.  If anyone surfaces obviously we can bring the driver
   back.  If not, good to drop it to avoid wasting anyone's time cleaning
   it up.
 
 New features
 * bme680
   - DT support and bindings doc.
 * isl29018
   - Add regulator for VCC.
 * mag3110
   - Add regulators for supplies.
 * meson-saradc
   - Support the temperature sensors of more SoCs.
 * mma8452
   - Add regulators for power suplies and binding docs to reflect them.
 * st-accel
   - Support the undocumented but it seems fairly common _ONT ACPI method
     to specify orientation of the sensor.
 
 Cleanup, minor fixes and fixes for staging driver that have been broken a
 long time
 * ad5933
   - Drop platform data alternative to specifying the reference voltage
     using a regulator.
   - Use the clock framework to contorl the reference clock.
   - Add a DT binding doc to cover the defacto binding.
 * ad7280a
   - Split up some big functions to improve readability.
 * ad7606
   - Allow for timeout if interrupt never occurs.
   - Use devm functions to simplify probe and remove.
   - Use the find_closest macro to avoid need for precise values from
     userspace.
   - Add missing vendor prefixes for various DT properties. Note the
     driver is in staging still and there are no known devicetrees.
   - Add explict OF device ID table.
   - Simplify the Kconfig choices
   - Change to a threaded IRQ.
   - SPDX and simple stype fixes.
 * ad7816
   - Drop unnecessary variable init.
 * ad9523
   - Check a return value that was ignored.
 * ad9833
   - Drop platform data.  It was just setting most values to the hardware
     defaults.
   - Use the clock framework to provide the input clock.
 * adt7316 (lots of staging cleanup)
   - Fix some wrong register / bit definitions
   - Invert the logic of the check for an ldac pin so it actually makes sense.
   - Read the right register to get internal vref settings
   - Allow adt751x chips to use the internal vref for all DAC channels rather
     than a subset.
   - Remove dac vref bypass control from parts that don't have one.
   - Make the store DAC update mode function consistent with the show one.
   - Fix some spellings and other minor tidy up.
   - Avoid passing irq numbers around by putting all the irq logic in
     one place.
   - Fix an issue with the resolution of DAC control.
   - Fix support of the high resolution DAC mode (for temp proportional output)
     where supported.
   - Fix DAC read and write calculations.
 * st_lsm6dsx
   - Drop an unused variable (set but not read)
 * xilinx-xadc
   - Check an unhandled return value.
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Merge tag 'iio-for-5.1a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

First set of new device support, features and cleanup for IIO in the 5.1 cycle

A number of interesting new devices supported plus a good set of staging
cleanup including one graduation and one drop.

New device support
* ad56886
  - Add support for AD5674R/AD5679R with some minor driver changes to support
    more channels.
* ad7768
  - New driver and dt bindings for this 24 bit ADC.
* max44009
  - New driver and dt bindings for this ambient light sensor.
* mpu6050
  - Support the ICM 20602 IMU. Minor tweaks due to slightly different
    register map.
* NPCM adc
  - New driver and dt bindings for this BMC ADC.
* Sensiron SGP30
  - Modifiers for ethanol and H2.
  - New driver and dt bindings.
  - Follow patch added self cleaning support.
* Sensiron SPS30
  - New channel type for mass concentration.
  - New driver and bindings.
  - Minor tidy up patch followed (drop fmt specifier as unused)
* st_pressure
  - lps22hh support. ID plus information structures and dt bindings.
* ti-ads124s08
  - Add binding doc and driver.

Staging graduations
* ad7606 driver and bindings.

Staging drops
* ad7152 CDC driver dropped.  This part is near EoL and no one is known
  to be using it.  If anyone surfaces obviously we can bring the driver
  back.  If not, good to drop it to avoid wasting anyone's time cleaning
  it up.

New features
* bme680
  - DT support and bindings doc.
* isl29018
  - Add regulator for VCC.
* mag3110
  - Add regulators for supplies.
* meson-saradc
  - Support the temperature sensors of more SoCs.
* mma8452
  - Add regulators for power suplies and binding docs to reflect them.
* st-accel
  - Support the undocumented but it seems fairly common _ONT ACPI method
    to specify orientation of the sensor.

Cleanup, minor fixes and fixes for staging driver that have been broken a
long time
* ad5933
  - Drop platform data alternative to specifying the reference voltage
    using a regulator.
  - Use the clock framework to contorl the reference clock.
  - Add a DT binding doc to cover the defacto binding.
* ad7280a
  - Split up some big functions to improve readability.
* ad7606
  - Allow for timeout if interrupt never occurs.
  - Use devm functions to simplify probe and remove.
  - Use the find_closest macro to avoid need for precise values from
    userspace.
  - Add missing vendor prefixes for various DT properties. Note the
    driver is in staging still and there are no known devicetrees.
  - Add explict OF device ID table.
  - Simplify the Kconfig choices
  - Change to a threaded IRQ.
  - SPDX and simple stype fixes.
* ad7816
  - Drop unnecessary variable init.
* ad9523
  - Check a return value that was ignored.
* ad9833
  - Drop platform data.  It was just setting most values to the hardware
    defaults.
  - Use the clock framework to provide the input clock.
* adt7316 (lots of staging cleanup)
  - Fix some wrong register / bit definitions
  - Invert the logic of the check for an ldac pin so it actually makes sense.
  - Read the right register to get internal vref settings
  - Allow adt751x chips to use the internal vref for all DAC channels rather
    than a subset.
  - Remove dac vref bypass control from parts that don't have one.
  - Make the store DAC update mode function consistent with the show one.
  - Fix some spellings and other minor tidy up.
  - Avoid passing irq numbers around by putting all the irq logic in
    one place.
  - Fix an issue with the resolution of DAC control.
  - Fix support of the high resolution DAC mode (for temp proportional output)
    where supported.
  - Fix DAC read and write calculations.
* st_lsm6dsx
  - Drop an unused variable (set but not read)
* xilinx-xadc
  - Check an unhandled return value.

* tag 'iio-for-5.1a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (67 commits)
  iio: chemical: sps30: remove printk format specifier
  staging: iio: frequency: ad9833: Load clock using clock framework
  staging: iio: frequency: ad9833: Get frequency value statically
  dt-bindings: iio: light: Add max44009
  iio: light: add driver for MAX44009
  dt-bindings: iio: adc: Add docs for AD7768-1
  iio: adc: Add AD7768-1 ADC basic support
  staging: iio: cdc: ad7152: remove driver completely
  iio: imu: mpu6050: Add support for the ICM 20602 IMU
  dt-bindings: iio: imu: add icm20602 bindings to mpu6050
  dt-bindings: iio: pressure: add LPS22HH bindings
  iio: st_accel: use ACPI orientation data
  iio: adc: add NPCM ADC driver
  dt-binding: iio: add NPCM ADC documentation
  iio: chemical: sps30: allow changing self cleaning period
  dt-bindings: iio: chemical: Add bindings for bme680
  iio: chemical: bme680: Add device-tree support
  iio:st_pressure:initial lps22hh sensor support
  iio: accell: mma8452: add vdd/vddio regulator operation support
  dt-bindings: iio: accel: mma8452: add power supplies property
  ...
2019-02-04 07:06:36 +01:00
Greg Kroah-Hartman 6d923f8fe8 First set of IIO fixes for the 5.0 cycle.
Been a busy month, so these are rather later than they should have been.
 
 * atlas-ph-sensor:
   - Temperature scale didn't correspond to the ABI.
 * axp288:
   - A few different fixes around the TS-pin handling.
 * ti-ads8688
   - Not enough space in the buffer used to build the scan to allow for
     the timestamp.
 * tools - iio_generic_buffer
   - Make num_loops signed so that we really are running for ever
     rather than just a long time when we specify -1.
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Merge tag 'iio-fixes-5.0a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus

Jonathan writes:

First set of IIO fixes for the 5.0 cycle.

Been a busy month, so these are rather later than they should have been.

* atlas-ph-sensor:
  - Temperature scale didn't correspond to the ABI.
* axp288:
  - A few different fixes around the TS-pin handling.
* ti-ads8688
  - Not enough space in the buffer used to build the scan to allow for
    the timestamp.
* tools - iio_generic_buffer
  - Make num_loops signed so that we really are running for ever
    rather than just a long time when we specify -1.

* tag 'iio-fixes-5.0a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio:
  iio: ti-ads8688: Update buffer allocation for timestamps
  tools: iio: iio_generic_buffer: make num_loops signed
  iio: adc: axp288: Fix TS-pin handling
  iio: chemical: atlas-ph-sensor: correct IIO_TEMP values to millicelsius
2019-02-03 13:10:41 +01:00
Stefan Popa a5f8c7da3d iio: adc: Add AD7768-1 ADC basic support
The ad7768-1 is a single channel, precision 24-bit analog to digital
converter (ADC).

This basic patch configures the device in fast mode, with 32 kSPS and
leaves the default sinc5 filter.

Two data conversion modes are made available. When data is retrieved by
using the read_raw attribute, one shot single conversion mode is set.
The continuous conversion mode is enabled when the triggered buffer
mechanism is used. To assure correct data retrieval, the driver waits
for the interrupt triggered by the low to high transition of the DRDY
pin.

Datasheets:
Link: https://www.analog.com/media/en/technical-documentation/data-sheets/ad7768-1.pdf

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-02-02 10:28:56 +00:00
Lee Jones fa56a62d01 Merge branches 'ib-mfd-iio-input-5.1', 'ib-mfd-input-watchdog-5.1' and 'ib-mfd-platform-5.1' into ibs-for-mfd-merged 2019-02-01 08:20:04 +00:00
Tomer Maimon 9bf85fbc9d iio: adc: add NPCM ADC driver
Add Nuvoton NPCM BMC Analog-to-Digital Converter(ADC) driver.

The NPCM ADC is a 10-bit converter for eight channel inputs.

Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-01-19 18:58:54 +00:00
Stefan Agner 9f3d084965 iio: adc: add STMPE ADC driver using IIO framework
This adds an ADC driver for the STMPE device using the industrial
input/output interface. The driver supports raw reading of values.
The driver depends on the MFD STMPE driver. If the touchscreen
block is enabled too, only four of the 8 ADC channels are available.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2019-01-16 12:37:04 +00:00
Linus Torvalds 9deb9e1637 - New Device Support
- Add support for Power Supply to AXP813
    - Add support for GPIO, ADC, AC and Battery Power Supply to AXP803
    - Add support for UART to Exynos LPASS
 
  - Fix-ups
    - Use supplied MACROS; ti_am335x_tscadc
    - Trivial spelling/whitespace/alignment; tmio, axp20x, rave-sp
    - Regmap changes; bd9571mwv, wm5110-tables
    - Kconfig dependencies; MFD_AT91_USART
    - Supply shared data for child-devices; madera-core
    - Use new of_node_name_eq() API call; max77620, stmpe
    - Use managed resources (devm_*); tps65218
    - Comment descriptions; ingenic-tcu
    - Coding style; madera-core
 
  - Bug Fixes
    - Fix section mismatches; twl-core, db8500-prcmu
    - Correct error path related issues; mt6397-core, ab8500-core, mc13xxx-core
    - IRQ related fixes; tps6586x
    - Ensure proper initialisation sequence; qcom_rpm
    - Repair potential memory leak; cros_ec_dev
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Merge tag 'mfd-next-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd

Pull MFD updates from Lee Jones:
 "New Device Support
   - Add support for Power Supply to AXP813
   - Add support for GPIO, ADC, AC and Battery Power Supply to AXP803
   - Add support for UART to Exynos LPASS

  Fix-ups:
   - Use supplied MACROS; ti_am335x_tscadc
   - Trivial spelling/whitespace/alignment; tmio, axp20x, rave-sp
   - Regmap changes; bd9571mwv, wm5110-tables
   - Kconfig dependencies; MFD_AT91_USART
   - Supply shared data for child-devices; madera-core
   - Use new of_node_name_eq() API call; max77620, stmpe
   - Use managed resources (devm_*); tps65218
   - Comment descriptions; ingenic-tcu
   - Coding style; madera-core

  Bug Fixes:
   - Fix section mismatches; twl-core, db8500-prcmu
   - Correct error path related issues; mt6397-core, ab8500-core, mc13xxx-core
   - IRQ related fixes; tps6586x
   - Ensure proper initialisation sequence; qcom_rpm
   - Repair potential memory leak; cros_ec_dev"

* tag 'mfd-next-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (25 commits)
  mfd: exynos-lpass: Enable UART module support
  mfd: mc13xxx: Fix a missing check of a register-read failure
  mfd: cros_ec: Add commands to control codec
  mfd: madera: Remove spurious semicolon in while loop
  mfd: rave-sp: Fix typo in rave_sp_checksum comment
  mfd: ingenic-tcu: Fix bit field description in header
  mfd: tps65218: Use devm_regmap_add_irq_chip and clean up error path in probe()
  mfd: Use of_node_name_eq() for node name comparisons
  mfd: cros_ec_dev: Add missing mfd_remove_devices() call in remove
  mfd: axp20x: Add supported cells for AXP803
  mfd: axp20x: Re-align MFD cell entries
  mfd: axp20x: Add AC power supply cell for AXP813
  mfd: wm5110: Add missing ASRC rate register
  mfd: qcom_rpm: write fw_version to CTRL_REG
  mfd: tps6586x: Handle interrupts on suspend
  mfd: madera: Add shared data for accessory detection
  mfd: at91-usart: Add platform dependency
  mfd: bd9571mwv: Add volatile register to make DVFS work
  mfd: ab8500-core: Return zero in get_register_interruptible()
  mfd: tmio: Typo s/use use/use/
  ...
2019-01-15 06:24:36 +12:00
Dan Murphy e717f8c6df iio: adc: Add the TI ads124s08 ADC code
Introduce the TI ADS124S08 and the ADS124S06 ADC
devices from TI.  The ADS124S08 is the 12 channel ADC
and the ADS124S06 is the 6 channel ADC device

These devices share a common datasheet:
http://www.ti.com/lit/gpn/ads124s08

Signed-off-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-01-12 18:42:39 +00:00
Dan Murphy f214ff521f iio: ti-ads8688: Update buffer allocation for timestamps
Per Jonathan Cameron, the buffer needs to allocate room for a
64 bit timestamp as well as the channels.  Change the buffer
to allocate this additional space.

Fixes: 2a86487786 ("iio: adc: ti-ads8688: add trigger and buffer support")
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-01-12 18:32:28 +00:00
Hans de Goede 9bcf15f75c iio: adc: axp288: Fix TS-pin handling
Prior to this commit there were 3 issues with our handling of the TS-pin:

1) There are 2 ways how the firmware can disable monitoring of the TS-pin
for designs which do not have a temperature-sensor for the battery:
a) Clearing bit 0 of the AXP20X_ADC_EN1 register
b) Setting bit 2 of the AXP288_ADC_TS_PIN_CTRL monitoring

Prior to this commit we were unconditionally setting both bits to the
value used on devices with a TS. This causes the temperature protection to
kick in on devices without a TS, such as the Jumper ezbook v2, causing
them to not charge under Linux.

This commit fixes this by using regmap_update_bits when updating these 2
registers, leaving the 2 mentioned bits alone.

The next 2 problems are related to our handling of the current-source
for the TS-pin. The current-source used for the battery temp-sensor (TS)
is shared with the GPADC. For proper fuel-gauge and charger operation the
TS current-source needs to be permanently on. But to read the GPADC we
need to temporary switch the TS current-source to ondemand, so that the
GPADC can use it, otherwise we will always read an all 0 value.

2) Problem 2 is we were writing hardcoded values to the ADC TS pin-ctrl
register, overwriting various other unrelated bits. Specifically we were
overwriting the current-source setting for the TS and GPIO0 pins, forcing
it to 80ųA independent of its original setting. On a Chuwi Vi10 tablet
this was causing us to get a too high adc value (due to a too high
current-source) resulting in the following errors being logged:

ACPI Error: AE_ERROR, Returned by Handler for [UserDefinedRegion]
ACPI Error: Method parse/execution failed \_SB.SXP1._TMP, AE_ERROR

This commit fixes this by using regmap_update_bits to change only the
relevant bits.

3) After reading the GPADC channel we were unconditionally enabling the
TS current-source even on devices where the TS-pin is not used and the
current-source thus was off before axp288_adc_read_raw call.

This commit fixes this by making axp288_adc_set_ts a nop on devices where
the ADC is not enabled for the TS-pin.

BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1610545
Fixes: 3091141d78 ("iio: adc: axp288: Fix the GPADC pin ...")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-01-12 17:09:55 +00:00
Aditya Pakki 7fc93f3285 iio: adc: xilinx: check return value of xadc_write_adc_reg
In function xadc_probe, xadc_write_adc_reg can return an error value
when write fails. The fix checks for the return value consistent with
other invocations of the latter function.

Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Reviewed-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-01-05 16:44:02 +00:00
Martin Blumenstingl b002bf5f8d iio: adc: meson-saradc: enable the temperature sensor two more SoCs
Meson8b and Meson8m2 use the same logic to convert the ADC register
value to celsius, which is different from Meson8:
- Meson8 has different multiplier and divider values
- Meson8 uses a 4-bit TSC (temperature sensor coefficient) which fits
  into the 4-bit field in the MESON_SAR_ADC_DELTA_10 register:
  MESON_SAR_ADC_DELTA_10_TS_C_MASK. Meson8b and Meson8m2 have a 5-bit
  TSC which requires writing the upper-most bit into the
  MESON_HHI_DPLL_TOP_0[9] register from the HHI register area.

This adds support for the temperature sensor on the Meson8b and Meson8m2
SoCs by implementing the logic to write the upper-most TSC bit into the
HHI register area. The SoC-specific values (temperature_trimming_bits,
temperature_multiplier, temperature_divider) are added - these simply
integrate into the existing infrastructure (which was implemented for
Meson8) and thus require no further changes to the existing temperature
calculation logic.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-01-05 16:42:05 +00:00
Stefan Popa 2985a5d884 staging: iio: adc: ad7606: Move out of staging
Move ad7606 ADC driver out of staging and into the mainline.

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-01-05 16:10:59 +00:00
Evan Green db23d88756 iio: adc: qcom-spmi-adc5: Initialize prescale properly
adc5_get_dt_data uses a local, prop, feeds it to adc5_get_dt_channel_data,
and then puts the result into adc->chan_props. The problem is
adc5_get_dt_channel_data may not initialize that structure fully, so a
garbage value is used for prescale if the optional "qcom,pre-scaling" is
not defined in DT. adc5_read_raw then uses this as an array index,
generating a crash that looks like this:

[    6.683186] Unable to handle kernel paging request at virtual address ffffff90e78c7964
Call trace:
qcom_vadc_scale_code_voltage_factor+0x74/0x104
qcom_vadc_scale_hw_calib_die_temp+0x20/0x60
qcom_adc5_hw_scale+0x78/0xa4
adc5_read_raw+0x3d0/0x65c
iio_channel_read+0x240/0x30c
iio_read_channel_processed+0x10c/0x150
qpnp_tm_get_temp+0xc0/0x40c
of_thermal_get_temp+0x7c/0x98
thermal_zone_get_temp+0xac/0xd8
thermal_zone_device_update+0xc0/0x38c
qpnp_tm_probe+0x624/0x81c
platform_drv_probe+0xe4/0x11c
really_probe+0x188/0x3fc
driver_probe_device+0xb8/0x188
__device_attach_driver+0x114/0x180
bus_for_each_drv+0xd8/0x118
__device_attach+0x180/0x27c
device_initial_probe+0x20/0x2c
bus_probe_device+0x78/0x124
deferred_probe_work_func+0xfc/0x138
process_one_work+0x3d8/0x8b0
process_scheduled_works+0x48/0x6c
worker_thread+0x488/0x7cc
kthread+0x24c/0x264
ret_from_fork+0x10/0x18

Unfortunately, when I went to add the initializer for this and tried to
boot it, my machine shut down immediately, complaining that it was
hotter than the sun. It appears that adc5_chans_pmic and adc5_chans_rev2
were initializing prescale_index as if it were directly a divisor,
rather than the index into adc5_prescale_ratios that it is.

Fix the uninitialized value, and change the static initialization to use
indices into adc5_prescale_ratios.

Signed-off-by: Evan Green <evgreen@chromium.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-12-12 17:45:30 +00:00
Jonathan Bakker d1655c7f48 iio: adc: Allow selection of Exynos ADC on S5PV210
Make it possible to use Exynos ADC driver on S5PV210 based devices.

Signed-off-by: Jonathan Bakker <xc-racer2@live.ca>
Signed-off-by: Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-12-12 17:19:32 +00:00
Jonathan Bakker 882bf52fde iio: adc: exynos-adc: Add S5PV210 variant
S5PV210's ADC variant is almost the same as v1 except that it has 10
channels and doesn't require the pmu register

Signed-off-by: Jonathan Bakker <xc-racer2@live.ca>
Signed-off-by: Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-12-12 17:15:05 +00:00
Vignesh R 4b3ab9372f iio: adc: ti_am335x_tscadc: Improve accuracy of measurement
When performing single ended measurements with TSCADC, its recommended
to set negative input (SEL_INM_SWC_3_0) of ADC step to ADC's VREFN in the
corresponding STEP_CONFIGx register.

Also, the positive(SEL_RFP_SWC_2_0) and negative(SEL_RFM_SWC_1_0)
reference voltage for ADC step needs to be set to VREFP and VREFN
respectively in STEP_CONFIGx register.
Without these changes, there may be variation of as much as ~2% in the
ADC's digital output which is bad for precise measurement.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2018-12-03 11:33:20 +00:00
Fabrice Gasnier 49ad8d2892 iio: adc: stm32-adc: switch off running adc when going to low power
Switch off ADC when going to low power mode, in case it has been left
running in buffer mode. Then re-enable it when resuming.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-11-25 13:16:38 +00:00
Fabrice Gasnier 9bdbb1139c iio: adc: stm32-adc: add power management support
Add support for runtime PM & sleep. Move all regulator and clock management
to dedicated HW start/stop routines. Then rely on (runtime) PM OPS to
call them.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-11-25 13:15:24 +00:00
Fabrice Gasnier 0da98c7b28 iio: adc: stm32-adc: move self-calibration to prepare routine
Move self-calibration routine to prepare routine.
- This is precursor patch to ease power management handling.
- This also allow to factorize few error cases (error handling).

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-11-25 13:13:40 +00:00
Martin Blumenstingl 50314f98b0 iio: adc: meson-saradc: fix internal clock names
Before this patch we are registering the internal clocks (for example on
Meson8b, where the SAR ADC IP block implements the divider and gate
clocks) with the following names:
- /soc/cbus@c1100000/adc@8680#adc_div
- /soc/cbus@c1100000/adc@8680#adc_en

This is bad because the common clock framework uses the clock to create
a directory in <debugfs>/clk. With such name, the directory creation
(silently) fails and the debugfs entry ends up being created at the
debugfs root.

With this change, the new clock names are:
- c1108680.adc#adc_div
- c1108680.adc#adc_en

This matches the clock naming scheme used in the PWM, Ethernet and MMC
drivers. It also fixes the problem with debugfs.
The idea is shamelessly taken from commit b96e9eb628 ("pwm: meson:
Fix mux clock names").

Fixes: 3921db46a8 ("iio: Convert to using %pOF instead of full_name")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-11-25 10:41:36 +00:00
Nicholas Mc Guire aad172b017 iio: adc: meson-saradc: check for devm_kasprintf failure
devm_kasprintf() may return NULL on failure of internal allocation thus
the assignments to  init.name  are not safe if not checked. On error
meson_sar_adc_clk_init() returns negative values so -ENOMEM in the
(unlikely) failure case of devm_kasprintf() should be fine here.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Fixes: 3adbf34273 ("iio: adc: add a driver for the SAR ADC found in Amlogic Meson SoCs")
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Tested-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-11-25 10:38:36 +00:00
Greg Kroah-Hartman 7c0bc65c84 First set of new device support, features and cleanups for IIO in the 4.21 cycle
Along with the headline feature of 5 new drivers, we have the
 substantial addition of auxilliary sensor support on the lsm6sdx
 parts for ST.  There has also been a good set of staging cleanup
 in this period with more underway.
 
 An ever increasing number of devices supported with just a new
 ID which is a good sign that at least some manufacturers are
 continuing to stabilise their interfaces.
 
 New device support,
 * ad7124
   - New driver supporting Analog Devices' ad7124-4 and ad7124-8 parts
     with the inevitable DT binding.
 * ad7949
   - New driver supporting Analog Devices' ad7949, AD7682 and AD7689 ADCs.
 * rm3100
   - New driver supporting PNIs RM3100 magnometer with bindings and
     vendor prefix.
 * ti-dac7311
   - New driver supporting DAC7311, DAC6311 and DAC5311 TI DACs, with
     DT bindings.
 * vcnl5035
   - New driver supporting the light sensor part of the VCNL4035, with
     DT bindings
 
 Features,
 * bindings
   - Add a generic ADC channel binding as we keep reinventing this
     wheel.
 * adc128s052
   - Add IDs for additional pin compatible parts.
   - Add APCI ID seen on E3940 UP squared boards.
 * ad_sigma_delta
   - Allow for custom data register overiding default.
 * kxcjk1013
   - Add KIOX0009 ACPI ID as seen on the Acer One 10.
 * lsm6dsx
   - Rework leading to...
   - External sensor support using the built in I2C master.
   - Initial support for a slave lis2mdl magnetometer.
 * meson-saradc
   - Add temperature sensor support and bindings.
 * st_magn
   - New ID for lsm9dsl_magn with bindings
   - New ID for lis3de accelerometer
 * tpl0102
   - Add supprot for IIO_AVAIL_RANGE to report the range available
     from this device to userspace and in kernel users.
 
 Cleanups and minor fixes
 * tools
   - Allow outside specification of CFLAGS
 * ad2s90
   - Handle and spi_read error.
   - Handle spi_setup failure
   - Drop a pointless assignment.
   - Prevent a potentail race by moving device registration to after
     all other setup.
   - Add missing scale attribute.
   - Add a sanity check on channel type before trying to read it.
 * ad2s1210
   - Move to modern gpio descriptors.
   - Drop a gpioin flag which made no sense as far as we can tell.
   - Add dt table (bindings doc to follow when this is ready for
     moving out of staging).
 * ad5933
   - Drop camel-case naming of ext_clk_hz.
   - White space fixes.
 * ad7150
   - Local variable to shorten overly long line.
   - Alignment and line break fixes.
 * ad7280a
   - Handle an error path that was previously ignored.
   - Use crc8.h to build the crc table replacing custom code.
   - Avoid unecessary cast.
   - Power down the device if an error happens in probe
   - Use devm routines to simplify probe and remove.
 * ad7606
   - Alignment fixes.
 * ad7780
   - This worked as long as by coincidence an uninitialized value
     was 0.  Lets not rely on that.
   - Ensure gain update is only used with the ad778x chips that
     actually support it.
   - Tidy up pattern mask generation.
   - Read regulator when scale is requested (which should be infrequent)
     as it might have changed from initialization.
 * ad7816
   - Move to modern gpio descriptors
   - Don't use a busy_pin for ad7818 as there isn't one.
   - Ensure RD/WR and CONVST pins are outputs (previously they
     were brought up as inputs which doesn't seem to make any sense)
   - DT id table.
 * adc128s052
   - SPDX
 * adt7316
   - Alignment fix.
   - Fix data reading.  When using I2C the driver never actually
     used the value read.  This has been broken a very long time
     hence no rush to fix it now + the driver is undergoing a lot
     of cleanup.
   - Sanity check that the i2c read didn't fail to actually read
     anything.
 * dpot-dac
   - Mark a switch full through with slightly different text so that
     gcc doesn't warn on it.
 * gyro-adc
   - Fix a wrong file in the MAINTAINERS entry and add binding doc to the
     listed files.
 * ina2xx
   - Add some early returns to clarify error paths in switch.
 * lsm6dsx
   - MAINTAINERS entry.
 * max11100
   - SPDX
 * max9611
   - SPDX
 * mcp4131
   - use of_device_get_match_data in preference to spi_get_device_id
     approach.
 * rcar-adc
   - SPDX
 * sc27xx
   - Add ADC conversion timeout support to avoid possible fault.
 * ssp_sensors
   - Don't free managed resources manually.
 * st-magn
   - Add a comment to avoid future confusion over when to use -magn
     postfix (on multi chip in package parts)
   - Add BDU register for LIS3MDL where it seems to have been missed.
 * st-sensors
   - Minor spelling, grammar etc fixes.
 * tpl0102
   - Use a pointer rather than an index of an array to improve conciseness.
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Merge tag 'iio-for-4.21a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-testing

Jonathan writes:

First set of new device support, features and cleanups for IIO in the 4.21 cycle

Along with the headline feature of 5 new drivers, we have the
substantial addition of auxilliary sensor support on the lsm6sdx
parts for ST.  There has also been a good set of staging cleanup
in this period with more underway.

An ever increasing number of devices supported with just a new
ID which is a good sign that at least some manufacturers are
continuing to stabilise their interfaces.

New device support,
* ad7124
  - New driver supporting Analog Devices' ad7124-4 and ad7124-8 parts
    with the inevitable DT binding.
* ad7949
  - New driver supporting Analog Devices' ad7949, AD7682 and AD7689 ADCs.
* rm3100
  - New driver supporting PNIs RM3100 magnometer with bindings and
    vendor prefix.
* ti-dac7311
  - New driver supporting DAC7311, DAC6311 and DAC5311 TI DACs, with
    DT bindings.
* vcnl5035
  - New driver supporting the light sensor part of the VCNL4035, with
    DT bindings

Features,
* bindings
  - Add a generic ADC channel binding as we keep reinventing this
    wheel.
* adc128s052
  - Add IDs for additional pin compatible parts.
  - Add APCI ID seen on E3940 UP squared boards.
* ad_sigma_delta
  - Allow for custom data register overiding default.
* kxcjk1013
  - Add KIOX0009 ACPI ID as seen on the Acer One 10.
* lsm6dsx
  - Rework leading to...
  - External sensor support using the built in I2C master.
  - Initial support for a slave lis2mdl magnetometer.
* meson-saradc
  - Add temperature sensor support and bindings.
* st_magn
  - New ID for lsm9dsl_magn with bindings
  - New ID for lis3de accelerometer
* tpl0102
  - Add supprot for IIO_AVAIL_RANGE to report the range available
    from this device to userspace and in kernel users.

Cleanups and minor fixes
* tools
  - Allow outside specification of CFLAGS
* ad2s90
  - Handle and spi_read error.
  - Handle spi_setup failure
  - Drop a pointless assignment.
  - Prevent a potentail race by moving device registration to after
    all other setup.
  - Add missing scale attribute.
  - Add a sanity check on channel type before trying to read it.
* ad2s1210
  - Move to modern gpio descriptors.
  - Drop a gpioin flag which made no sense as far as we can tell.
  - Add dt table (bindings doc to follow when this is ready for
    moving out of staging).
* ad5933
  - Drop camel-case naming of ext_clk_hz.
  - White space fixes.
* ad7150
  - Local variable to shorten overly long line.
  - Alignment and line break fixes.
* ad7280a
  - Handle an error path that was previously ignored.
  - Use crc8.h to build the crc table replacing custom code.
  - Avoid unecessary cast.
  - Power down the device if an error happens in probe
  - Use devm routines to simplify probe and remove.
* ad7606
  - Alignment fixes.
* ad7780
  - This worked as long as by coincidence an uninitialized value
    was 0.  Lets not rely on that.
  - Ensure gain update is only used with the ad778x chips that
    actually support it.
  - Tidy up pattern mask generation.
  - Read regulator when scale is requested (which should be infrequent)
    as it might have changed from initialization.
* ad7816
  - Move to modern gpio descriptors
  - Don't use a busy_pin for ad7818 as there isn't one.
  - Ensure RD/WR and CONVST pins are outputs (previously they
    were brought up as inputs which doesn't seem to make any sense)
  - DT id table.
* adc128s052
  - SPDX
* adt7316
  - Alignment fix.
  - Fix data reading.  When using I2C the driver never actually
    used the value read.  This has been broken a very long time
    hence no rush to fix it now + the driver is undergoing a lot
    of cleanup.
  - Sanity check that the i2c read didn't fail to actually read
    anything.
* dpot-dac
  - Mark a switch full through with slightly different text so that
    gcc doesn't warn on it.
* gyro-adc
  - Fix a wrong file in the MAINTAINERS entry and add binding doc to the
    listed files.
* ina2xx
  - Add some early returns to clarify error paths in switch.
* lsm6dsx
  - MAINTAINERS entry.
* max11100
  - SPDX
* max9611
  - SPDX
* mcp4131
  - use of_device_get_match_data in preference to spi_get_device_id
    approach.
* rcar-adc
  - SPDX
* sc27xx
  - Add ADC conversion timeout support to avoid possible fault.
* ssp_sensors
  - Don't free managed resources manually.
* st-magn
  - Add a comment to avoid future confusion over when to use -magn
    postfix (on multi chip in package parts)
  - Add BDU register for LIS3MDL where it seems to have been missed.
* st-sensors
  - Minor spelling, grammar etc fixes.
* tpl0102
  - Use a pointer rather than an index of an array to improve conciseness.

* tag 'iio-for-4.21a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (80 commits)
  Staging: iio: adt7316: Add an extra check for 'ret' equals to 0
  Staging: iio: adt7316: Fix i2c data reading, set the data field
  dt-bindings: iio: adc: Add docs for ad7124
  iio: adc: Add ad7124 support
  dt-bindings: iio: adc: Add common ADCs properties to a separate file
  iio: ad_sigma_delta: Allow to provide custom data register address
  staging: iio: ad7816: Add device tree table.
  iio: imu: st_lsm6dsx: add entry in MAINTAINERS file
  iio: potentiometer: mcp4131: use of_device_get_match_data()
  staging: iio: adc: ad7280a: use devm_* APIs
  staging: iio: adc: ad7280a: power down the device on error in probe
  dt-bindings: iio: imu: st_lsm6dsx: add support to i2c pullup resistors
  iio: imu: st_lsm6dsx: add hw FIFO support to i2c controller
  iio: imu: st_lsm6dsx: add st_lsm6dsx_push_tagged_data routine
  iio: imu: st_lsm6dsx: add i2c embedded controller support
  iio: imu: st_lsm6dsx: introduce st_lsm6dsx_sensor_set_enable routine
  iio: imu: st_lsm6dsx: introduce ST_LSM6DSX_ID_EXT sensor ids
  iio: imu: st_lsm6dsx: remove static from st_lsm6dsx_set_watermark
  iio: imu: st_lsm6dsx: reload trimming parameter at bootstrap
  iio: imu: st_lsm6dsx: introduce locked read/write utility routines
  ...
2018-11-22 09:39:45 +01:00
Stefan Popa b3af341bbd iio: adc: Add ad7124 support
The ad7124-4 and ad7124-8 are a family of 4 and 8 channel sigma-delta ADCs
with 24-bit precision and reference.

Three power modes are available which in turn affect the output data rate:
 * Full power: 9.38 SPS to 19,200 SPS
 * Mid power: 2.34 SPS to 4800 SPS
 * Low power: 1.17 SPS to 2400 SPS

The ad7124-4 can be configured to have four differential inputs, while
ad7124-8 can have 8. Moreover, ad7124 also supports per channel
configuration. Each configuration consists of gain, reference source,
output data rate and bipolar/unipolar configuration.

Datasheets:
Link: http://www.analog.com/media/en/technical-documentation/data-sheets/AD7124-4.pdf
Link: http://www.analog.com/media/en/technical-documentation/data-sheets/ad7124-8.pdf

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-11-17 16:41:09 +00:00
Lars-Peter Clausen f0aef2d018 iio: ad_sigma_delta: Allow to provide custom data register address
Some newer devices from the Sigma-Delta ADC family do have their data
register at a different address than the current default address. Add a
parameter to the ad_sigma_delta_info struct which allows to override the
default address.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-11-17 16:30:00 +00:00
Freeman Liu 750ac07eb2 iio: adc: sc27xx: Add ADC data conversion timeout
Sometimes the ADC controller met some problems, and it will not complete
the data conversion, that will can not wake up the read process any more
to block users. So we should add one maximum conversion time to avoid
this issue.

Signed-off-by: Freeman Liu <freeman.liu@unisoc.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-11-16 18:32:32 +00:00
Kuninori Morimoto efeb87d81c iio: adc: rcar-gyroadc: convert to SPDX identifiers
This patch updates license to use SPDX-License-Identifier
instead of verbose license text.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-11-16 18:32:28 +00:00
Kuninori Morimoto c924eee309 iio: adc: max11100: convert to SPDX identifiers
This patch updates license to use SPDX-License-Identifier
instead of verbose license text.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-11-16 18:32:27 +00:00
Kuninori Morimoto 2fa720b4b7 iio: adc: max9611: convert to SPDX identifiers
This patch updates license to use SPDX-License-Identifier
instead of verbose license text.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-11-16 18:32:27 +00:00
Martin Blumenstingl 723a61e0a7 iio: adc: meson-saradc: add support for the chip's temperature sensor
Channel 6 of the SAR ADC can be switched between two inputs:
SAR_ADC_CH6 input (an actual pad on the SoC) and the signal from the
temperature sensor inside the SoC.

To get usable results from the temperature sensor we need to read the
corresponding calibration data from the eFuse and pass it to the SAR ADC
registers. If the temperature sensor is not calibrated (the eFuse data
contains a bit for this) then the driver will only register the
iio_chan_spec's for voltage measurements.

This only enables the temperature sensor for the Meson8 SoC. Meson8b and
Meson8m2 SoCs can be supported in the future as well but we first need
a way to pass the fifth TSC (temperature sensor coefficient) bit to the
HHI register area (apart from that the infrastructure as already
implemented for Meson8 can be used). On the 64-bit SoCs (GXBB, GXL and
GXM) the temperature sensor inside SAR ADC is firmware-controlled (by
BL30, we can simply use the SCPI hwmon driver to get the chip
temperature).

To keep the devicetree interface backwards compatible we simply skip the
temperature sensor initialization if no eFuse nvmem cell is passed via
devicetree.

The public documentation for the SAR ADC IP block does not explain how
to use the registers to read the temperature. The logic from this patch
is based on reading and understanding Amlogic's GPL kernel sources.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-11-11 15:29:49 +00:00
Charles-Antoine Couret 7f40e06143 iio:adc:ad7949: Add AD7949 ADC driver family
Compatible with AD7682 and AD7689 chips.
It is a Analog Devices ADC driver 14/16 bits 4/8 channels
with SPI protocol

Datasheet of the device:
http://www.analog.com/media/en/technical-documentation/data-sheets/AD7949.pdf

Signed-off-by: Charles-Antoine Couret <charles-antoine.couret@essensium.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-11-03 09:44:34 +00:00
Dan O'Donovan 7d1d308a47 iio: adc128s052: use SPDX-License-Identifier
This updates the ti-adc128s052.c file to use SPDX-License-Identifier
instead of more verbose license text.

Signed-off-by: Dan O'Donovan <dan@emutex.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-11-03 09:44:33 +00:00
Nicola Lunghi bd5d54e4d4 iio: adc128s052: add ACPI _HID AANT1280
ACPI _HID AANT1280 matches an ADC124S101 present on E3940 SKUs of the UP
Squared board.

Add it to the driver.

Signed-off-by: Nicola Lunghi <nicola.lunghi@emutex.com>
[javier@emutex.com: fix up commit message and one checkpatch warning]
Signed-off-by: Javier Arteaga <javier@emutex.com>
Signed-off-by: Dan O'Donovan <dan@emutex.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-11-03 09:44:32 +00:00