2018-05-08 01:52:29 +08:00
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// SPDX-License-Identifier: GPL-2.0
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2008-01-17 15:51:08 +08:00
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/*
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* thermal.c - Generic Thermal Management Sysfs support.
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*
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* Copyright (C) 2008 Intel Corp
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* Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com>
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* Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com>
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*/
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2012-03-22 03:55:02 +08:00
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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2008-01-17 15:51:08 +08:00
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#include <linux/device.h>
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#include <linux/err.h>
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2020-05-11 20:24:50 +08:00
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#include <linux/export.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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2008-01-17 15:51:08 +08:00
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#include <linux/kdev_t.h>
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#include <linux/idr.h>
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#include <linux/thermal.h>
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2008-12-04 01:55:32 +08:00
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#include <linux/reboot.h>
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2013-05-17 19:52:02 +08:00
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#include <linux/string.h>
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2013-09-27 03:55:01 +08:00
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#include <linux/of.h>
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2015-10-30 16:31:58 +08:00
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#include <linux/suspend.h>
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2008-01-17 15:51:08 +08:00
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2014-07-29 18:50:48 +08:00
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#define CREATE_TRACE_POINTS
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#include <trace/events/thermal.h>
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2012-09-18 13:34:53 +08:00
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#include "thermal_core.h"
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2013-07-04 03:14:28 +08:00
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#include "thermal_hwmon.h"
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2012-09-18 13:34:53 +08:00
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2016-12-22 01:47:03 +08:00
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static DEFINE_IDA(thermal_tz_ida);
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static DEFINE_IDA(thermal_cdev_ida);
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2008-01-17 15:51:08 +08:00
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static LIST_HEAD(thermal_tz_list);
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static LIST_HEAD(thermal_cdev_list);
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2012-09-18 13:34:57 +08:00
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static LIST_HEAD(thermal_governor_list);
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2008-01-17 15:51:08 +08:00
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static DEFINE_MUTEX(thermal_list_lock);
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2012-09-18 13:34:57 +08:00
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static DEFINE_MUTEX(thermal_governor_lock);
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2015-10-30 16:31:58 +08:00
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static atomic_t in_suspend;
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2014-01-24 10:23:19 +08:00
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static struct thermal_governor *def_governor;
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2016-11-08 13:09:05 +08:00
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/*
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* Governor section: set of functions to handle thermal governors
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*
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* Functions to help in the life cycle of thermal governors within
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* the thermal core and by the thermal governor code.
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*/
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2012-09-18 13:34:57 +08:00
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static struct thermal_governor *__find_governor(const char *name)
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{
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struct thermal_governor *pos;
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2014-01-24 10:23:19 +08:00
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if (!name || !name[0])
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return def_governor;
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2012-09-18 13:34:57 +08:00
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list_for_each_entry(pos, &thermal_governor_list, governor_list)
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2014-10-14 06:55:01 +08:00
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if (!strncasecmp(name, pos->name, THERMAL_NAME_LENGTH))
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2012-09-18 13:34:57 +08:00
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return pos;
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return NULL;
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}
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2015-02-27 03:00:27 +08:00
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/**
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* bind_previous_governor() - bind the previous governor of the thermal zone
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* @tz: a valid pointer to a struct thermal_zone_device
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* @failed_gov_name: the name of the governor that failed to register
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*
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* Register the previous governor of the thermal zone after a new
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* governor has failed to be bound.
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*/
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static void bind_previous_governor(struct thermal_zone_device *tz,
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const char *failed_gov_name)
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{
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if (tz->governor && tz->governor->bind_to_tz) {
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if (tz->governor->bind_to_tz(tz)) {
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dev_err(&tz->device,
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"governor %s failed to bind and the previous one (%s) failed to bind again, thermal zone %s has no governor\n",
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failed_gov_name, tz->governor->name, tz->type);
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tz->governor = NULL;
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}
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}
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}
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/**
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* thermal_set_governor() - Switch to another governor
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* @tz: a valid pointer to a struct thermal_zone_device
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* @new_gov: pointer to the new governor
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*
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* Change the governor of thermal zone @tz.
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*
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* Return: 0 on success, an error if the new governor's bind_to_tz() failed.
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*/
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static int thermal_set_governor(struct thermal_zone_device *tz,
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struct thermal_governor *new_gov)
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{
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int ret = 0;
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if (tz->governor && tz->governor->unbind_from_tz)
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tz->governor->unbind_from_tz(tz);
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if (new_gov && new_gov->bind_to_tz) {
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ret = new_gov->bind_to_tz(tz);
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if (ret) {
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bind_previous_governor(tz, new_gov->name);
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return ret;
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}
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}
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tz->governor = new_gov;
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return ret;
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}
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2012-09-18 13:34:57 +08:00
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int thermal_register_governor(struct thermal_governor *governor)
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{
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int err;
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const char *name;
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struct thermal_zone_device *pos;
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if (!governor)
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return -EINVAL;
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mutex_lock(&thermal_governor_lock);
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err = -EBUSY;
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2016-11-08 13:09:20 +08:00
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if (!__find_governor(governor->name)) {
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2016-11-08 13:09:21 +08:00
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bool match_default;
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2012-09-18 13:34:57 +08:00
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err = 0;
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list_add(&governor->governor_list, &thermal_governor_list);
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2016-11-08 13:09:21 +08:00
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match_default = !strncmp(governor->name,
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DEFAULT_THERMAL_GOVERNOR,
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THERMAL_NAME_LENGTH);
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if (!def_governor && match_default)
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2014-01-24 10:23:19 +08:00
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def_governor = governor;
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2012-09-18 13:34:57 +08:00
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}
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mutex_lock(&thermal_list_lock);
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list_for_each_entry(pos, &thermal_tz_list, node) {
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2014-01-24 10:23:19 +08:00
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/*
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* only thermal zones with specified tz->tzp->governor_name
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* may run with tz->govenor unset
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*/
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2012-09-18 13:34:57 +08:00
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if (pos->governor)
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continue;
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2014-01-24 10:23:19 +08:00
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name = pos->tzp->governor_name;
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2015-02-27 03:00:27 +08:00
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if (!strncasecmp(name, governor->name, THERMAL_NAME_LENGTH)) {
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int ret;
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ret = thermal_set_governor(pos, governor);
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if (ret)
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dev_err(&pos->device,
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"Failed to set governor %s for thermal zone %s: %d\n",
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governor->name, pos->type, ret);
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}
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2012-09-18 13:34:57 +08:00
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}
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mutex_unlock(&thermal_list_lock);
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mutex_unlock(&thermal_governor_lock);
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return err;
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}
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void thermal_unregister_governor(struct thermal_governor *governor)
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{
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struct thermal_zone_device *pos;
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if (!governor)
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return;
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mutex_lock(&thermal_governor_lock);
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2016-11-08 13:09:20 +08:00
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if (!__find_governor(governor->name))
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2012-09-18 13:34:57 +08:00
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goto exit;
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mutex_lock(&thermal_list_lock);
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list_for_each_entry(pos, &thermal_tz_list, node) {
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2014-10-14 06:55:01 +08:00
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if (!strncasecmp(pos->governor->name, governor->name,
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2016-11-08 13:09:21 +08:00
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THERMAL_NAME_LENGTH))
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2015-02-27 03:00:27 +08:00
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thermal_set_governor(pos, NULL);
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2012-09-18 13:34:57 +08:00
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}
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mutex_unlock(&thermal_list_lock);
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list_del(&governor->governor_list);
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exit:
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mutex_unlock(&thermal_governor_lock);
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2012-09-18 13:34:54 +08:00
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}
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2016-11-08 13:09:05 +08:00
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int thermal_zone_device_set_policy(struct thermal_zone_device *tz,
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char *policy)
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2012-09-18 13:34:54 +08:00
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{
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2016-11-08 13:09:05 +08:00
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struct thermal_governor *gov;
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int ret = -EINVAL;
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2012-09-18 13:34:54 +08:00
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2016-11-08 13:09:05 +08:00
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mutex_lock(&thermal_governor_lock);
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2012-09-18 13:34:54 +08:00
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mutex_lock(&tz->lock);
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2016-11-08 13:09:05 +08:00
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gov = __find_governor(strim(policy));
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if (!gov)
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goto exit;
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2012-09-18 13:34:54 +08:00
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2016-11-08 13:09:05 +08:00
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ret = thermal_set_governor(tz, gov);
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2012-09-18 13:34:54 +08:00
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2016-11-08 13:09:05 +08:00
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exit:
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mutex_unlock(&tz->lock);
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mutex_unlock(&thermal_governor_lock);
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2012-09-18 13:34:54 +08:00
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2020-07-06 18:55:38 +08:00
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thermal_notify_tz_gov_change(tz->id, policy);
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2016-11-08 13:09:05 +08:00
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return ret;
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2012-09-18 13:34:59 +08:00
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}
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2016-11-08 13:09:05 +08:00
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int thermal_build_list_of_policies(char *buf)
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2012-09-18 13:34:59 +08:00
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{
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2016-11-08 13:09:05 +08:00
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struct thermal_governor *pos;
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ssize_t count = 0;
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2012-09-18 13:34:59 +08:00
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2016-11-08 13:09:05 +08:00
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mutex_lock(&thermal_governor_lock);
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2013-07-17 03:26:28 +08:00
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2016-11-08 13:09:05 +08:00
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list_for_each_entry(pos, &thermal_governor_list, governor_list) {
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2021-09-16 21:13:42 +08:00
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count += scnprintf(buf + count, PAGE_SIZE - count, "%s ",
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pos->name);
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2012-09-18 13:34:59 +08:00
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}
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2021-09-16 21:13:42 +08:00
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count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
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2012-09-18 13:34:59 +08:00
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2016-11-08 13:09:05 +08:00
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mutex_unlock(&thermal_governor_lock);
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2012-09-18 13:34:59 +08:00
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2016-11-08 13:09:05 +08:00
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return count;
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2012-09-18 13:34:59 +08:00
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}
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2019-06-13 04:13:25 +08:00
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static void __init thermal_unregister_governors(void)
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2012-09-18 13:34:59 +08:00
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{
|
2019-06-13 04:13:25 +08:00
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struct thermal_governor **governor;
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for_each_governor_table(governor)
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thermal_unregister_governor(*governor);
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}
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2012-09-18 13:34:59 +08:00
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2019-06-13 04:13:25 +08:00
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static int __init thermal_register_governors(void)
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{
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int ret = 0;
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struct thermal_governor **governor;
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2012-09-18 13:34:59 +08:00
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2019-06-13 04:13:25 +08:00
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for_each_governor_table(governor) {
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ret = thermal_register_governor(*governor);
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if (ret) {
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pr_err("Failed to register governor: '%s'",
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(*governor)->name);
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break;
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}
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2012-09-18 13:34:59 +08:00
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2019-06-13 04:13:25 +08:00
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pr_info("Registered thermal governor '%s'",
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(*governor)->name);
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}
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2012-09-18 13:34:59 +08:00
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2019-06-13 04:13:25 +08:00
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if (ret) {
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struct thermal_governor **gov;
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2012-09-18 13:34:59 +08:00
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2019-06-13 04:13:25 +08:00
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for_each_governor_table(gov) {
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if (gov == governor)
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break;
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thermal_unregister_governor(*gov);
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}
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}
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2012-09-18 13:34:59 +08:00
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2019-06-13 04:13:25 +08:00
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return ret;
|
2012-09-18 13:34:59 +08:00
|
|
|
}
|
|
|
|
|
2016-11-08 13:09:15 +08:00
|
|
|
/*
|
|
|
|
* Zone update section: main control loop applied to each zone while monitoring
|
|
|
|
*
|
|
|
|
* in polling mode. The monitoring is done using a workqueue.
|
|
|
|
* Same update may be done on a zone by calling thermal_zone_device_update().
|
|
|
|
*
|
|
|
|
* An update means:
|
|
|
|
* - Non-critical trips will invoke the governor responsible for that zone;
|
|
|
|
* - Hot trips will produce a notification to userspace;
|
|
|
|
* - Critical trip point will cause a system shutdown.
|
|
|
|
*/
|
2012-09-18 13:35:04 +08:00
|
|
|
static void thermal_zone_device_set_polling(struct thermal_zone_device *tz,
|
2020-12-17 06:03:36 +08:00
|
|
|
unsigned long delay)
|
2012-09-18 13:35:04 +08:00
|
|
|
{
|
2020-12-17 06:03:36 +08:00
|
|
|
if (delay)
|
2018-09-04 15:14:08 +08:00
|
|
|
mod_delayed_work(system_freezable_power_efficient_wq,
|
2020-12-17 06:03:36 +08:00
|
|
|
&tz->poll_queue, delay);
|
2012-09-18 13:35:04 +08:00
|
|
|
else
|
2019-11-13 04:42:23 +08:00
|
|
|
cancel_delayed_work(&tz->poll_queue);
|
2012-09-18 13:35:04 +08:00
|
|
|
}
|
|
|
|
|
2020-06-29 20:29:23 +08:00
|
|
|
static inline bool should_stop_polling(struct thermal_zone_device *tz)
|
|
|
|
{
|
|
|
|
return !thermal_zone_device_is_enabled(tz);
|
|
|
|
}
|
|
|
|
|
2012-09-18 13:35:04 +08:00
|
|
|
static void monitor_thermal_zone(struct thermal_zone_device *tz)
|
|
|
|
{
|
2020-06-29 20:29:23 +08:00
|
|
|
bool stop;
|
|
|
|
|
|
|
|
stop = should_stop_polling(tz);
|
|
|
|
|
2012-09-18 13:35:04 +08:00
|
|
|
mutex_lock(&tz->lock);
|
|
|
|
|
2020-06-29 20:29:23 +08:00
|
|
|
if (!stop && tz->passive)
|
2020-12-17 06:03:36 +08:00
|
|
|
thermal_zone_device_set_polling(tz, tz->passive_delay_jiffies);
|
2020-12-17 06:03:37 +08:00
|
|
|
else if (!stop && tz->polling_delay_jiffies)
|
2020-12-17 06:03:36 +08:00
|
|
|
thermal_zone_device_set_polling(tz, tz->polling_delay_jiffies);
|
2012-09-18 13:35:04 +08:00
|
|
|
else
|
|
|
|
thermal_zone_device_set_polling(tz, 0);
|
|
|
|
|
|
|
|
mutex_unlock(&tz->lock);
|
|
|
|
}
|
|
|
|
|
2018-10-15 15:21:01 +08:00
|
|
|
static void handle_non_critical_trips(struct thermal_zone_device *tz, int trip)
|
2012-09-18 13:35:04 +08:00
|
|
|
{
|
2014-01-24 10:23:19 +08:00
|
|
|
tz->governor ? tz->governor->throttle(tz, trip) :
|
|
|
|
def_governor->throttle(tz, trip);
|
2012-09-18 13:35:04 +08:00
|
|
|
}
|
|
|
|
|
2021-06-03 13:41:03 +08:00
|
|
|
void thermal_zone_device_critical(struct thermal_zone_device *tz)
|
2017-04-18 12:29:59 +08:00
|
|
|
{
|
|
|
|
/*
|
|
|
|
* poweroff_delay_ms must be a carefully profiled positive value.
|
2021-06-03 13:41:03 +08:00
|
|
|
* Its a must for forced_emergency_poweroff_work to be scheduled.
|
2017-04-18 12:29:59 +08:00
|
|
|
*/
|
2021-06-03 13:41:03 +08:00
|
|
|
int poweroff_delay_ms = CONFIG_THERMAL_EMERGENCY_POWEROFF_DELAY_MS;
|
2017-04-18 12:29:59 +08:00
|
|
|
|
2020-12-10 20:15:11 +08:00
|
|
|
dev_emerg(&tz->device, "%s: critical temperature reached, "
|
|
|
|
"shutting down\n", tz->type);
|
|
|
|
|
2021-06-03 13:41:03 +08:00
|
|
|
hw_protection_shutdown("Temperature too high", poweroff_delay_ms);
|
2020-12-10 20:15:11 +08:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(thermal_zone_device_critical);
|
|
|
|
|
2012-09-18 13:35:04 +08:00
|
|
|
static void handle_critical_trips(struct thermal_zone_device *tz,
|
2016-11-08 13:09:21 +08:00
|
|
|
int trip, enum thermal_trip_type trip_type)
|
2012-09-18 13:35:04 +08:00
|
|
|
{
|
2015-07-24 14:12:54 +08:00
|
|
|
int trip_temp;
|
2012-09-18 13:35:04 +08:00
|
|
|
|
|
|
|
tz->ops->get_trip_temp(tz, trip, &trip_temp);
|
|
|
|
|
|
|
|
/* If we have not crossed the trip_temp, we do not care. */
|
2014-11-13 07:43:29 +08:00
|
|
|
if (trip_temp <= 0 || tz->temperature < trip_temp)
|
2012-09-18 13:35:04 +08:00
|
|
|
return;
|
|
|
|
|
2014-07-29 18:50:50 +08:00
|
|
|
trace_thermal_zone_trip(tz, trip, trip_type);
|
|
|
|
|
2020-12-10 20:15:11 +08:00
|
|
|
if (trip_type == THERMAL_TRIP_HOT && tz->ops->hot)
|
|
|
|
tz->ops->hot(tz);
|
|
|
|
else if (trip_type == THERMAL_TRIP_CRITICAL)
|
|
|
|
tz->ops->critical(tz);
|
2012-09-18 13:35:04 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static void handle_thermal_trip(struct thermal_zone_device *tz, int trip)
|
|
|
|
{
|
|
|
|
enum thermal_trip_type type;
|
2020-07-06 18:55:38 +08:00
|
|
|
int trip_temp, hyst = 0;
|
2012-09-18 13:35:04 +08:00
|
|
|
|
2016-03-18 10:03:24 +08:00
|
|
|
/* Ignore disabled trip points */
|
|
|
|
if (test_bit(trip, &tz->trips_disabled))
|
|
|
|
return;
|
|
|
|
|
2020-07-06 18:55:38 +08:00
|
|
|
tz->ops->get_trip_temp(tz, trip, &trip_temp);
|
2012-09-18 13:35:04 +08:00
|
|
|
tz->ops->get_trip_type(tz, trip, &type);
|
2020-07-06 18:55:38 +08:00
|
|
|
if (tz->ops->get_trip_hyst)
|
|
|
|
tz->ops->get_trip_hyst(tz, trip, &hyst);
|
|
|
|
|
|
|
|
if (tz->last_temperature != THERMAL_TEMP_INVALID) {
|
|
|
|
if (tz->last_temperature < trip_temp &&
|
|
|
|
tz->temperature >= trip_temp)
|
|
|
|
thermal_notify_tz_trip_up(tz->id, trip);
|
|
|
|
if (tz->last_temperature >= trip_temp &&
|
|
|
|
tz->temperature < (trip_temp - hyst))
|
|
|
|
thermal_notify_tz_trip_down(tz->id, trip);
|
|
|
|
}
|
2012-09-18 13:35:04 +08:00
|
|
|
|
|
|
|
if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT)
|
|
|
|
handle_critical_trips(tz, trip, type);
|
|
|
|
else
|
2018-10-15 15:21:01 +08:00
|
|
|
handle_non_critical_trips(tz, trip);
|
2012-09-18 13:35:04 +08:00
|
|
|
/*
|
|
|
|
* Alright, we handled this trip successfully.
|
|
|
|
* So, start monitoring again.
|
|
|
|
*/
|
|
|
|
monitor_thermal_zone(tz);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void update_temperature(struct thermal_zone_device *tz)
|
|
|
|
{
|
2015-07-24 14:12:54 +08:00
|
|
|
int temp, ret;
|
2012-09-18 13:35:04 +08:00
|
|
|
|
2013-02-04 08:30:15 +08:00
|
|
|
ret = thermal_zone_get_temp(tz, &temp);
|
2012-09-18 13:35:04 +08:00
|
|
|
if (ret) {
|
2015-03-21 22:02:55 +08:00
|
|
|
if (ret != -EAGAIN)
|
|
|
|
dev_warn(&tz->device,
|
|
|
|
"failed to read out thermal zone (%d)\n",
|
|
|
|
ret);
|
2013-02-04 08:30:15 +08:00
|
|
|
return;
|
2012-09-18 13:35:04 +08:00
|
|
|
}
|
|
|
|
|
2013-02-04 08:30:15 +08:00
|
|
|
mutex_lock(&tz->lock);
|
2012-09-18 13:35:04 +08:00
|
|
|
tz->last_temperature = tz->temperature;
|
|
|
|
tz->temperature = temp;
|
|
|
|
mutex_unlock(&tz->lock);
|
thermal: debug: add debug statement for core and step_wise
To ease debugging thermal problem, add these dynamic debug statements
so that user do not need rebuild kernel to see these info.
Based on a patch from Zhang Rui for debugging on bugzilla:
https://bugzilla.kernel.org/attachment.cgi?id=98671
A sample output after we turn on dynamic debug with the following cmd:
# echo 'module thermal_sys +fp' > /sys/kernel/debug/dynamic_debug/control
is like:
[ 355.147627] update_temperature: thermal thermal_zone0: last_temperature=52000, current_temperature=55000
[ 355.147636] thermal_zone_trip_update: thermal thermal_zone0: Trip1[type=1,temp=79000]:trend=2,throttle=0
[ 355.147644] get_target_state: thermal cooling_device8: cur_state=0
[ 355.147647] thermal_zone_trip_update: thermal cooling_device8: old_target=-1, target=-1
[ 355.147652] get_target_state: thermal cooling_device7: cur_state=0
[ 355.147655] thermal_zone_trip_update: thermal cooling_device7: old_target=-1, target=-1
[ 355.147660] get_target_state: thermal cooling_device6: cur_state=0
[ 355.147663] thermal_zone_trip_update: thermal cooling_device6: old_target=-1, target=-1
[ 355.147668] get_target_state: thermal cooling_device5: cur_state=0
[ 355.147671] thermal_zone_trip_update: thermal cooling_device5: old_target=-1, target=-1
[ 355.147678] thermal_zone_trip_update: thermal thermal_zone0: Trip2[type=0,temp=90000]:trend=1,throttle=0
[ 355.147776] get_target_state: thermal cooling_device0: cur_state=0
[ 355.147783] thermal_zone_trip_update: thermal cooling_device0: old_target=-1, target=-1
[ 355.147792] thermal_zone_trip_update: thermal thermal_zone0: Trip3[type=0,temp=80000]:trend=1,throttle=0
[ 355.147845] get_target_state: thermal cooling_device1: cur_state=0
[ 355.147849] thermal_zone_trip_update: thermal cooling_device1: old_target=-1, target=-1
[ 355.147856] thermal_zone_trip_update: thermal thermal_zone0: Trip4[type=0,temp=70000]:trend=1,throttle=0
[ 355.147904] get_target_state: thermal cooling_device2: cur_state=0
[ 355.147908] thermal_zone_trip_update: thermal cooling_device2: old_target=-1, target=-1
[ 355.147915] thermal_zone_trip_update: thermal thermal_zone0: Trip5[type=0,temp=60000]:trend=1,throttle=0
[ 355.147963] get_target_state: thermal cooling_device3: cur_state=0
[ 355.147967] thermal_zone_trip_update: thermal cooling_device3: old_target=-1, target=-1
[ 355.147973] thermal_zone_trip_update: thermal thermal_zone0: Trip6[type=0,temp=55000]:trend=1,throttle=1
[ 355.148022] get_target_state: thermal cooling_device4: cur_state=0
[ 355.148025] thermal_zone_trip_update: thermal cooling_device4: old_target=-1, target=1
[ 355.148036] thermal_cdev_update: thermal cooling_device4: zone0->target=1
[ 355.169279] thermal_cdev_update: thermal cooling_device4: set to state 1
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Acked-by: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
2013-12-02 13:54:26 +08:00
|
|
|
|
2014-07-29 18:50:48 +08:00
|
|
|
trace_thermal_temperature(tz);
|
2020-07-06 18:55:38 +08:00
|
|
|
|
|
|
|
thermal_genl_sampling_temp(tz->id, temp);
|
2015-10-30 16:31:47 +08:00
|
|
|
}
|
|
|
|
|
2018-11-08 06:36:11 +08:00
|
|
|
static void thermal_zone_device_init(struct thermal_zone_device *tz)
|
2015-10-30 16:31:47 +08:00
|
|
|
{
|
|
|
|
struct thermal_instance *pos;
|
|
|
|
tz->temperature = THERMAL_TEMP_INVALID;
|
|
|
|
list_for_each_entry(pos, &tz->thermal_instances, tz_node)
|
|
|
|
pos->initialized = false;
|
2012-09-18 13:35:04 +08:00
|
|
|
}
|
|
|
|
|
2020-06-29 20:29:20 +08:00
|
|
|
static int thermal_zone_device_set_mode(struct thermal_zone_device *tz,
|
|
|
|
enum thermal_device_mode mode)
|
|
|
|
{
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
mutex_lock(&tz->lock);
|
|
|
|
|
|
|
|
/* do nothing if mode isn't changing */
|
|
|
|
if (mode == tz->mode) {
|
|
|
|
mutex_unlock(&tz->lock);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2020-06-29 20:29:25 +08:00
|
|
|
if (tz->ops->change_mode)
|
|
|
|
ret = tz->ops->change_mode(tz, mode);
|
2020-06-29 20:29:20 +08:00
|
|
|
|
|
|
|
if (!ret)
|
|
|
|
tz->mode = mode;
|
|
|
|
|
|
|
|
mutex_unlock(&tz->lock);
|
|
|
|
|
|
|
|
thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED);
|
|
|
|
|
2020-07-28 07:10:33 +08:00
|
|
|
if (mode == THERMAL_DEVICE_ENABLED)
|
|
|
|
thermal_notify_tz_enable(tz->id);
|
|
|
|
else
|
|
|
|
thermal_notify_tz_disable(tz->id);
|
|
|
|
|
2020-06-29 20:29:20 +08:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
int thermal_zone_device_enable(struct thermal_zone_device *tz)
|
|
|
|
{
|
|
|
|
return thermal_zone_device_set_mode(tz, THERMAL_DEVICE_ENABLED);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(thermal_zone_device_enable);
|
|
|
|
|
|
|
|
int thermal_zone_device_disable(struct thermal_zone_device *tz)
|
|
|
|
{
|
|
|
|
return thermal_zone_device_set_mode(tz, THERMAL_DEVICE_DISABLED);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(thermal_zone_device_disable);
|
|
|
|
|
|
|
|
int thermal_zone_device_is_enabled(struct thermal_zone_device *tz)
|
|
|
|
{
|
|
|
|
enum thermal_device_mode mode;
|
|
|
|
|
|
|
|
mutex_lock(&tz->lock);
|
|
|
|
|
|
|
|
mode = tz->mode;
|
|
|
|
|
|
|
|
mutex_unlock(&tz->lock);
|
|
|
|
|
|
|
|
return mode == THERMAL_DEVICE_ENABLED;
|
|
|
|
}
|
|
|
|
|
2016-08-27 07:21:16 +08:00
|
|
|
void thermal_zone_device_update(struct thermal_zone_device *tz,
|
|
|
|
enum thermal_notify_event event)
|
2012-09-18 13:35:04 +08:00
|
|
|
{
|
|
|
|
int count;
|
|
|
|
|
2020-06-29 20:29:23 +08:00
|
|
|
if (should_stop_polling(tz))
|
|
|
|
return;
|
|
|
|
|
2015-10-30 16:31:58 +08:00
|
|
|
if (atomic_read(&in_suspend))
|
|
|
|
return;
|
|
|
|
|
2020-12-10 20:15:10 +08:00
|
|
|
if (WARN_ONCE(!tz->ops->get_temp, "'%s' must not be called without "
|
|
|
|
"'get_temp' ops set\n", __func__))
|
2013-09-13 07:15:44 +08:00
|
|
|
return;
|
|
|
|
|
2012-09-18 13:35:04 +08:00
|
|
|
update_temperature(tz);
|
|
|
|
|
2016-06-22 16:42:01 +08:00
|
|
|
thermal_zone_set_trips(tz);
|
|
|
|
|
2016-08-27 07:21:16 +08:00
|
|
|
tz->notify_event = event;
|
|
|
|
|
2012-09-18 13:35:04 +08:00
|
|
|
for (count = 0; count < tz->trips; count++)
|
|
|
|
handle_thermal_trip(tz, count);
|
|
|
|
}
|
2013-04-24 05:48:15 +08:00
|
|
|
EXPORT_SYMBOL_GPL(thermal_zone_device_update);
|
2012-09-18 13:35:04 +08:00
|
|
|
|
|
|
|
static void thermal_zone_device_check(struct work_struct *work)
|
|
|
|
{
|
|
|
|
struct thermal_zone_device *tz = container_of(work, struct
|
|
|
|
thermal_zone_device,
|
|
|
|
poll_queue.work);
|
2016-08-27 07:21:16 +08:00
|
|
|
thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED);
|
2012-09-18 13:35:04 +08:00
|
|
|
}
|
|
|
|
|
2020-07-06 18:55:35 +08:00
|
|
|
int for_each_thermal_governor(int (*cb)(struct thermal_governor *, void *),
|
|
|
|
void *data)
|
|
|
|
{
|
|
|
|
struct thermal_governor *gov;
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
mutex_lock(&thermal_governor_lock);
|
|
|
|
list_for_each_entry(gov, &thermal_governor_list, governor_list) {
|
|
|
|
ret = cb(gov, data);
|
|
|
|
if (ret)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
mutex_unlock(&thermal_governor_lock);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
int for_each_thermal_cooling_device(int (*cb)(struct thermal_cooling_device *,
|
|
|
|
void *), void *data)
|
|
|
|
{
|
|
|
|
struct thermal_cooling_device *cdev;
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
mutex_lock(&thermal_list_lock);
|
|
|
|
list_for_each_entry(cdev, &thermal_cdev_list, node) {
|
|
|
|
ret = cb(cdev, data);
|
|
|
|
if (ret)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
mutex_unlock(&thermal_list_lock);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
int for_each_thermal_zone(int (*cb)(struct thermal_zone_device *, void *),
|
|
|
|
void *data)
|
|
|
|
{
|
|
|
|
struct thermal_zone_device *tz;
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
mutex_lock(&thermal_list_lock);
|
|
|
|
list_for_each_entry(tz, &thermal_tz_list, node) {
|
|
|
|
ret = cb(tz, data);
|
|
|
|
if (ret)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
mutex_unlock(&thermal_list_lock);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2020-07-06 18:55:36 +08:00
|
|
|
struct thermal_zone_device *thermal_zone_get_by_id(int id)
|
|
|
|
{
|
2020-07-25 01:01:05 +08:00
|
|
|
struct thermal_zone_device *tz, *match = NULL;
|
2020-07-06 18:55:36 +08:00
|
|
|
|
|
|
|
mutex_lock(&thermal_list_lock);
|
|
|
|
list_for_each_entry(tz, &thermal_tz_list, node) {
|
2020-07-25 01:01:05 +08:00
|
|
|
if (tz->id == id) {
|
|
|
|
match = tz;
|
2020-07-06 18:55:36 +08:00
|
|
|
break;
|
2020-07-25 01:01:05 +08:00
|
|
|
}
|
2020-07-06 18:55:36 +08:00
|
|
|
}
|
|
|
|
mutex_unlock(&thermal_list_lock);
|
|
|
|
|
2020-07-25 01:01:05 +08:00
|
|
|
return match;
|
2020-07-06 18:55:36 +08:00
|
|
|
}
|
|
|
|
|
2016-11-08 13:09:17 +08:00
|
|
|
/*
|
|
|
|
* Device management section: cooling devices, zones devices, and binding
|
|
|
|
*
|
|
|
|
* Set of functions provided by the thermal core for:
|
|
|
|
* - cooling devices lifecycle: registration, unregistration,
|
|
|
|
* binding, and unbinding.
|
|
|
|
* - thermal zone devices lifecycle: registration, unregistration,
|
|
|
|
* binding, and unbinding.
|
|
|
|
*/
|
2008-01-17 15:51:08 +08:00
|
|
|
|
|
|
|
/**
|
2013-04-24 05:48:16 +08:00
|
|
|
* thermal_zone_bind_cooling_device() - bind a cooling device to a thermal zone
|
|
|
|
* @tz: pointer to struct thermal_zone_device
|
2008-01-17 15:51:08 +08:00
|
|
|
* @trip: indicates which trip point the cooling devices is
|
|
|
|
* associated with in this thermal zone.
|
2013-04-24 05:48:16 +08:00
|
|
|
* @cdev: pointer to struct thermal_cooling_device
|
|
|
|
* @upper: the Maximum cooling state for this trip point.
|
|
|
|
* THERMAL_NO_LIMIT means no upper limit,
|
|
|
|
* and the cooling device can be in max_state.
|
|
|
|
* @lower: the Minimum cooling state can be used for this trip point.
|
|
|
|
* THERMAL_NO_LIMIT means no lower limit,
|
|
|
|
* and the cooling device can be in cooling state 0.
|
2015-02-19 00:04:21 +08:00
|
|
|
* @weight: The weight of the cooling device to be bound to the
|
|
|
|
* thermal zone. Use THERMAL_WEIGHT_DEFAULT for the
|
|
|
|
* default value
|
2008-02-08 05:55:08 +08:00
|
|
|
*
|
2013-04-24 05:48:16 +08:00
|
|
|
* This interface function bind a thermal cooling device to the certain trip
|
|
|
|
* point of a thermal zone device.
|
2008-02-08 05:55:08 +08:00
|
|
|
* This function is usually called in the thermal zone device .bind callback.
|
2013-04-24 05:48:16 +08:00
|
|
|
*
|
|
|
|
* Return: 0 on success, the proper error value otherwise.
|
2008-01-17 15:51:08 +08:00
|
|
|
*/
|
|
|
|
int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
|
|
|
|
int trip,
|
2012-06-26 16:35:57 +08:00
|
|
|
struct thermal_cooling_device *cdev,
|
2015-02-19 00:04:21 +08:00
|
|
|
unsigned long upper, unsigned long lower,
|
|
|
|
unsigned int weight)
|
2008-01-17 15:51:08 +08:00
|
|
|
{
|
2012-06-27 10:08:19 +08:00
|
|
|
struct thermal_instance *dev;
|
|
|
|
struct thermal_instance *pos;
|
2008-02-15 13:58:50 +08:00
|
|
|
struct thermal_zone_device *pos1;
|
|
|
|
struct thermal_cooling_device *pos2;
|
2012-06-26 16:27:22 +08:00
|
|
|
unsigned long max_state;
|
2014-11-18 18:16:30 +08:00
|
|
|
int result, ret;
|
2008-01-17 15:51:08 +08:00
|
|
|
|
2020-12-15 07:38:08 +08:00
|
|
|
if (trip >= tz->trips || trip < 0)
|
2008-01-17 15:51:08 +08:00
|
|
|
return -EINVAL;
|
|
|
|
|
2008-02-15 13:58:50 +08:00
|
|
|
list_for_each_entry(pos1, &thermal_tz_list, node) {
|
|
|
|
if (pos1 == tz)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
list_for_each_entry(pos2, &thermal_cdev_list, node) {
|
|
|
|
if (pos2 == cdev)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (tz != pos1 || cdev != pos2)
|
2008-01-17 15:51:08 +08:00
|
|
|
return -EINVAL;
|
|
|
|
|
2014-11-18 18:16:30 +08:00
|
|
|
ret = cdev->ops->get_max_state(cdev, &max_state);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
2012-06-26 16:35:57 +08:00
|
|
|
|
|
|
|
/* lower default 0, upper default max_state */
|
|
|
|
lower = lower == THERMAL_NO_LIMIT ? 0 : lower;
|
|
|
|
upper = upper == THERMAL_NO_LIMIT ? max_state : upper;
|
|
|
|
|
|
|
|
if (lower > upper || upper > max_state)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2016-11-08 13:09:25 +08:00
|
|
|
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
|
2008-01-17 15:51:08 +08:00
|
|
|
if (!dev)
|
|
|
|
return -ENOMEM;
|
|
|
|
dev->tz = tz;
|
|
|
|
dev->cdev = cdev;
|
|
|
|
dev->trip = trip;
|
2012-06-26 16:35:57 +08:00
|
|
|
dev->upper = upper;
|
|
|
|
dev->lower = lower;
|
2012-06-27 14:13:04 +08:00
|
|
|
dev->target = THERMAL_NO_TARGET;
|
2015-02-19 00:04:21 +08:00
|
|
|
dev->weight = weight;
|
2012-06-26 16:27:22 +08:00
|
|
|
|
2016-12-22 01:47:03 +08:00
|
|
|
result = ida_simple_get(&tz->ida, 0, 0, GFP_KERNEL);
|
|
|
|
if (result < 0)
|
2008-01-17 15:51:08 +08:00
|
|
|
goto free_mem;
|
|
|
|
|
2016-12-22 01:47:03 +08:00
|
|
|
dev->id = result;
|
2008-01-17 15:51:08 +08:00
|
|
|
sprintf(dev->name, "cdev%d", dev->id);
|
|
|
|
result =
|
|
|
|
sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name);
|
|
|
|
if (result)
|
2016-12-22 01:47:03 +08:00
|
|
|
goto release_ida;
|
2008-01-17 15:51:08 +08:00
|
|
|
|
|
|
|
sprintf(dev->attr_name, "cdev%d_trip_point", dev->id);
|
2010-04-07 05:34:51 +08:00
|
|
|
sysfs_attr_init(&dev->attr.attr);
|
2008-01-17 15:51:08 +08:00
|
|
|
dev->attr.attr.name = dev->attr_name;
|
|
|
|
dev->attr.attr.mode = 0444;
|
2018-04-03 17:49:03 +08:00
|
|
|
dev->attr.show = trip_point_show;
|
2008-01-17 15:51:08 +08:00
|
|
|
result = device_create_file(&tz->device, &dev->attr);
|
|
|
|
if (result)
|
|
|
|
goto remove_symbol_link;
|
|
|
|
|
2015-02-19 00:04:24 +08:00
|
|
|
sprintf(dev->weight_attr_name, "cdev%d_weight", dev->id);
|
|
|
|
sysfs_attr_init(&dev->weight_attr.attr);
|
|
|
|
dev->weight_attr.attr.name = dev->weight_attr_name;
|
|
|
|
dev->weight_attr.attr.mode = S_IWUSR | S_IRUGO;
|
2018-04-03 17:49:03 +08:00
|
|
|
dev->weight_attr.show = weight_show;
|
|
|
|
dev->weight_attr.store = weight_store;
|
2015-02-19 00:04:24 +08:00
|
|
|
result = device_create_file(&tz->device, &dev->weight_attr);
|
|
|
|
if (result)
|
|
|
|
goto remove_trip_file;
|
|
|
|
|
2008-01-17 15:51:08 +08:00
|
|
|
mutex_lock(&tz->lock);
|
2012-07-24 16:56:21 +08:00
|
|
|
mutex_lock(&cdev->lock);
|
2012-06-27 10:09:36 +08:00
|
|
|
list_for_each_entry(pos, &tz->thermal_instances, tz_node)
|
2016-11-08 13:09:23 +08:00
|
|
|
if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
|
|
|
|
result = -EEXIST;
|
|
|
|
break;
|
|
|
|
}
|
2012-06-27 14:11:52 +08:00
|
|
|
if (!result) {
|
2012-06-27 10:09:36 +08:00
|
|
|
list_add_tail(&dev->tz_node, &tz->thermal_instances);
|
2012-06-27 14:11:52 +08:00
|
|
|
list_add_tail(&dev->cdev_node, &cdev->thermal_instances);
|
2015-10-30 16:32:10 +08:00
|
|
|
atomic_set(&tz->need_update, 1);
|
2012-06-27 14:11:52 +08:00
|
|
|
}
|
2012-07-24 16:56:21 +08:00
|
|
|
mutex_unlock(&cdev->lock);
|
2008-01-17 15:51:08 +08:00
|
|
|
mutex_unlock(&tz->lock);
|
|
|
|
|
|
|
|
if (!result)
|
|
|
|
return 0;
|
|
|
|
|
2015-02-19 00:04:24 +08:00
|
|
|
device_remove_file(&tz->device, &dev->weight_attr);
|
|
|
|
remove_trip_file:
|
2008-01-17 15:51:08 +08:00
|
|
|
device_remove_file(&tz->device, &dev->attr);
|
2012-03-22 03:55:02 +08:00
|
|
|
remove_symbol_link:
|
2008-01-17 15:51:08 +08:00
|
|
|
sysfs_remove_link(&tz->device.kobj, dev->name);
|
2016-12-22 01:47:03 +08:00
|
|
|
release_ida:
|
|
|
|
ida_simple_remove(&tz->ida, dev->id);
|
2012-03-22 03:55:02 +08:00
|
|
|
free_mem:
|
2008-01-17 15:51:08 +08:00
|
|
|
kfree(dev);
|
|
|
|
return result;
|
|
|
|
}
|
2013-04-24 05:48:15 +08:00
|
|
|
EXPORT_SYMBOL_GPL(thermal_zone_bind_cooling_device);
|
2008-01-17 15:51:08 +08:00
|
|
|
|
|
|
|
/**
|
2013-04-24 05:48:17 +08:00
|
|
|
* thermal_zone_unbind_cooling_device() - unbind a cooling device from a
|
|
|
|
* thermal zone.
|
|
|
|
* @tz: pointer to a struct thermal_zone_device.
|
2008-01-17 15:51:08 +08:00
|
|
|
* @trip: indicates which trip point the cooling devices is
|
|
|
|
* associated with in this thermal zone.
|
2013-04-24 05:48:17 +08:00
|
|
|
* @cdev: pointer to a struct thermal_cooling_device.
|
2008-02-08 05:55:08 +08:00
|
|
|
*
|
2013-04-24 05:48:17 +08:00
|
|
|
* This interface function unbind a thermal cooling device from the certain
|
|
|
|
* trip point of a thermal zone device.
|
2008-02-08 05:55:08 +08:00
|
|
|
* This function is usually called in the thermal zone device .unbind callback.
|
2013-04-24 05:48:17 +08:00
|
|
|
*
|
|
|
|
* Return: 0 on success, the proper error value otherwise.
|
2008-01-17 15:51:08 +08:00
|
|
|
*/
|
|
|
|
int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz,
|
|
|
|
int trip,
|
|
|
|
struct thermal_cooling_device *cdev)
|
|
|
|
{
|
2012-06-27 10:08:19 +08:00
|
|
|
struct thermal_instance *pos, *next;
|
2008-01-17 15:51:08 +08:00
|
|
|
|
|
|
|
mutex_lock(&tz->lock);
|
2012-07-24 16:56:21 +08:00
|
|
|
mutex_lock(&cdev->lock);
|
2012-06-27 10:09:36 +08:00
|
|
|
list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) {
|
2008-02-08 05:55:08 +08:00
|
|
|
if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
|
2012-06-27 10:09:36 +08:00
|
|
|
list_del(&pos->tz_node);
|
2012-06-27 14:11:52 +08:00
|
|
|
list_del(&pos->cdev_node);
|
2012-07-24 16:56:21 +08:00
|
|
|
mutex_unlock(&cdev->lock);
|
2008-01-17 15:51:08 +08:00
|
|
|
mutex_unlock(&tz->lock);
|
|
|
|
goto unbind;
|
|
|
|
}
|
|
|
|
}
|
2012-07-24 16:56:21 +08:00
|
|
|
mutex_unlock(&cdev->lock);
|
2008-01-17 15:51:08 +08:00
|
|
|
mutex_unlock(&tz->lock);
|
|
|
|
|
|
|
|
return -ENODEV;
|
|
|
|
|
2012-03-22 03:55:02 +08:00
|
|
|
unbind:
|
2015-07-23 17:02:32 +08:00
|
|
|
device_remove_file(&tz->device, &pos->weight_attr);
|
2008-01-17 15:51:08 +08:00
|
|
|
device_remove_file(&tz->device, &pos->attr);
|
|
|
|
sysfs_remove_link(&tz->device.kobj, pos->name);
|
2016-12-22 01:47:03 +08:00
|
|
|
ida_simple_remove(&tz->ida, pos->id);
|
2008-01-17 15:51:08 +08:00
|
|
|
kfree(pos);
|
|
|
|
return 0;
|
|
|
|
}
|
2013-04-24 05:48:15 +08:00
|
|
|
EXPORT_SYMBOL_GPL(thermal_zone_unbind_cooling_device);
|
2008-01-17 15:51:08 +08:00
|
|
|
|
|
|
|
static void thermal_release(struct device *dev)
|
|
|
|
{
|
|
|
|
struct thermal_zone_device *tz;
|
|
|
|
struct thermal_cooling_device *cdev;
|
|
|
|
|
2012-03-22 03:55:02 +08:00
|
|
|
if (!strncmp(dev_name(dev), "thermal_zone",
|
|
|
|
sizeof("thermal_zone") - 1)) {
|
2008-01-17 15:51:08 +08:00
|
|
|
tz = to_thermal_zone(dev);
|
2017-08-08 22:39:53 +08:00
|
|
|
thermal_zone_destroy_device_groups(tz);
|
2008-01-17 15:51:08 +08:00
|
|
|
kfree(tz);
|
2016-11-08 13:09:23 +08:00
|
|
|
} else if (!strncmp(dev_name(dev), "cooling_device",
|
|
|
|
sizeof("cooling_device") - 1)) {
|
2008-01-17 15:51:08 +08:00
|
|
|
cdev = to_cooling_device(dev);
|
|
|
|
kfree(cdev);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct class thermal_class = {
|
|
|
|
.name = "thermal",
|
|
|
|
.dev_release = thermal_release,
|
|
|
|
};
|
|
|
|
|
2016-11-08 13:09:13 +08:00
|
|
|
static inline
|
|
|
|
void print_bind_err_msg(struct thermal_zone_device *tz,
|
|
|
|
struct thermal_cooling_device *cdev, int ret)
|
2016-11-08 13:09:12 +08:00
|
|
|
{
|
|
|
|
dev_err(&tz->device, "binding zone %s with cdev %s failed:%d\n",
|
|
|
|
tz->type, cdev->type, ret);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __bind(struct thermal_zone_device *tz, int mask,
|
|
|
|
struct thermal_cooling_device *cdev,
|
|
|
|
unsigned long *limits,
|
|
|
|
unsigned int weight)
|
|
|
|
{
|
|
|
|
int i, ret;
|
|
|
|
|
|
|
|
for (i = 0; i < tz->trips; i++) {
|
|
|
|
if (mask & (1 << i)) {
|
|
|
|
unsigned long upper, lower;
|
|
|
|
|
|
|
|
upper = THERMAL_NO_LIMIT;
|
|
|
|
lower = THERMAL_NO_LIMIT;
|
|
|
|
if (limits) {
|
|
|
|
lower = limits[i * 2];
|
|
|
|
upper = limits[i * 2 + 1];
|
|
|
|
}
|
|
|
|
ret = thermal_zone_bind_cooling_device(tz, i, cdev,
|
|
|
|
upper, lower,
|
|
|
|
weight);
|
|
|
|
if (ret)
|
|
|
|
print_bind_err_msg(tz, cdev, ret);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2016-11-08 13:09:09 +08:00
|
|
|
static void bind_cdev(struct thermal_cooling_device *cdev)
|
|
|
|
{
|
|
|
|
int i, ret;
|
|
|
|
const struct thermal_zone_params *tzp;
|
|
|
|
struct thermal_zone_device *pos = NULL;
|
|
|
|
|
|
|
|
mutex_lock(&thermal_list_lock);
|
|
|
|
|
|
|
|
list_for_each_entry(pos, &thermal_tz_list, node) {
|
|
|
|
if (!pos->tzp && !pos->ops->bind)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
if (pos->ops->bind) {
|
|
|
|
ret = pos->ops->bind(pos, cdev);
|
|
|
|
if (ret)
|
|
|
|
print_bind_err_msg(pos, cdev, ret);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
tzp = pos->tzp;
|
|
|
|
if (!tzp || !tzp->tbp)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
for (i = 0; i < tzp->num_tbps; i++) {
|
|
|
|
if (tzp->tbp[i].cdev || !tzp->tbp[i].match)
|
|
|
|
continue;
|
|
|
|
if (tzp->tbp[i].match(pos, cdev))
|
|
|
|
continue;
|
|
|
|
tzp->tbp[i].cdev = cdev;
|
|
|
|
__bind(pos, tzp->tbp[i].trip_mask, cdev,
|
|
|
|
tzp->tbp[i].binding_limits,
|
|
|
|
tzp->tbp[i].weight);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
mutex_unlock(&thermal_list_lock);
|
|
|
|
}
|
|
|
|
|
2008-01-17 15:51:08 +08:00
|
|
|
/**
|
2013-09-27 03:55:01 +08:00
|
|
|
* __thermal_cooling_device_register() - register a new thermal cooling device
|
|
|
|
* @np: a pointer to a device tree node.
|
2008-01-17 15:51:08 +08:00
|
|
|
* @type: the thermal cooling device type.
|
|
|
|
* @devdata: device private data.
|
|
|
|
* @ops: standard thermal cooling devices callbacks.
|
2013-04-24 05:48:18 +08:00
|
|
|
*
|
|
|
|
* This interface function adds a new thermal cooling device (fan/processor/...)
|
|
|
|
* to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself
|
|
|
|
* to all the thermal zone devices registered at the same time.
|
2013-09-27 03:55:01 +08:00
|
|
|
* It also gives the opportunity to link the cooling device to a device tree
|
|
|
|
* node, so that it can be bound to a thermal zone created out of device tree.
|
2013-04-24 05:48:18 +08:00
|
|
|
*
|
|
|
|
* Return: a pointer to the created struct thermal_cooling_device or an
|
|
|
|
* ERR_PTR. Caller must check return value with IS_ERR*() helpers.
|
2008-01-17 15:51:08 +08:00
|
|
|
*/
|
2013-09-27 03:55:01 +08:00
|
|
|
static struct thermal_cooling_device *
|
|
|
|
__thermal_cooling_device_register(struct device_node *np,
|
2019-04-19 00:36:39 +08:00
|
|
|
const char *type, void *devdata,
|
2013-09-27 03:55:01 +08:00
|
|
|
const struct thermal_cooling_device_ops *ops)
|
2008-01-17 15:51:08 +08:00
|
|
|
{
|
|
|
|
struct thermal_cooling_device *cdev;
|
2015-10-30 16:32:10 +08:00
|
|
|
struct thermal_zone_device *pos = NULL;
|
2021-03-14 19:13:29 +08:00
|
|
|
int ret;
|
2008-01-17 15:51:08 +08:00
|
|
|
|
|
|
|
if (!ops || !ops->get_max_state || !ops->get_cur_state ||
|
2008-02-08 05:55:08 +08:00
|
|
|
!ops->set_cur_state)
|
2008-02-15 13:59:50 +08:00
|
|
|
return ERR_PTR(-EINVAL);
|
2008-01-17 15:51:08 +08:00
|
|
|
|
2016-11-08 13:09:25 +08:00
|
|
|
cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
|
2008-01-17 15:51:08 +08:00
|
|
|
if (!cdev)
|
2008-02-15 13:59:50 +08:00
|
|
|
return ERR_PTR(-ENOMEM);
|
2008-01-17 15:51:08 +08:00
|
|
|
|
2021-03-14 19:13:29 +08:00
|
|
|
ret = ida_simple_get(&thermal_cdev_ida, 0, 0, GFP_KERNEL);
|
|
|
|
if (ret < 0)
|
|
|
|
goto out_kfree_cdev;
|
|
|
|
cdev->id = ret;
|
|
|
|
|
|
|
|
cdev->type = kstrdup(type ? type : "", GFP_KERNEL);
|
|
|
|
if (!cdev->type) {
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto out_ida_remove;
|
2008-01-17 15:51:08 +08:00
|
|
|
}
|
|
|
|
|
2012-07-24 16:56:21 +08:00
|
|
|
mutex_init(&cdev->lock);
|
2012-06-27 14:11:52 +08:00
|
|
|
INIT_LIST_HEAD(&cdev->thermal_instances);
|
2013-09-27 03:55:01 +08:00
|
|
|
cdev->np = np;
|
2008-01-17 15:51:08 +08:00
|
|
|
cdev->ops = ops;
|
2014-02-17 11:02:55 +08:00
|
|
|
cdev->updated = false;
|
2008-01-17 15:51:08 +08:00
|
|
|
cdev->device.class = &thermal_class;
|
|
|
|
cdev->devdata = devdata;
|
2018-04-02 18:56:25 +08:00
|
|
|
thermal_cooling_device_setup_sysfs(cdev);
|
2009-01-07 02:44:37 +08:00
|
|
|
dev_set_name(&cdev->device, "cooling_device%d", cdev->id);
|
2021-03-14 19:13:29 +08:00
|
|
|
ret = device_register(&cdev->device);
|
|
|
|
if (ret)
|
|
|
|
goto out_kfree_type;
|
2008-01-17 15:51:08 +08:00
|
|
|
|
2012-09-18 13:34:59 +08:00
|
|
|
/* Add 'this' new cdev to the global cdev list */
|
2008-01-17 15:51:08 +08:00
|
|
|
mutex_lock(&thermal_list_lock);
|
|
|
|
list_add(&cdev->node, &thermal_cdev_list);
|
|
|
|
mutex_unlock(&thermal_list_lock);
|
|
|
|
|
2012-09-18 13:34:59 +08:00
|
|
|
/* Update binding information for 'this' new cdev */
|
|
|
|
bind_cdev(cdev);
|
|
|
|
|
2015-10-30 16:32:10 +08:00
|
|
|
mutex_lock(&thermal_list_lock);
|
|
|
|
list_for_each_entry(pos, &thermal_tz_list, node)
|
|
|
|
if (atomic_cmpxchg(&pos->need_update, 1, 0))
|
2016-08-27 07:21:16 +08:00
|
|
|
thermal_zone_device_update(pos,
|
|
|
|
THERMAL_EVENT_UNSPECIFIED);
|
2015-10-30 16:32:10 +08:00
|
|
|
mutex_unlock(&thermal_list_lock);
|
|
|
|
|
2012-09-18 13:34:59 +08:00
|
|
|
return cdev;
|
2021-03-14 19:13:29 +08:00
|
|
|
|
|
|
|
out_kfree_type:
|
|
|
|
kfree(cdev->type);
|
|
|
|
put_device(&cdev->device);
|
|
|
|
out_ida_remove:
|
|
|
|
ida_simple_remove(&thermal_cdev_ida, cdev->id);
|
|
|
|
out_kfree_cdev:
|
2021-03-20 04:22:57 +08:00
|
|
|
kfree(cdev);
|
2021-03-14 19:13:29 +08:00
|
|
|
return ERR_PTR(ret);
|
2008-01-17 15:51:08 +08:00
|
|
|
}
|
2013-09-27 03:55:01 +08:00
|
|
|
|
|
|
|
/**
|
|
|
|
* thermal_cooling_device_register() - register a new thermal cooling device
|
|
|
|
* @type: the thermal cooling device type.
|
|
|
|
* @devdata: device private data.
|
|
|
|
* @ops: standard thermal cooling devices callbacks.
|
|
|
|
*
|
|
|
|
* This interface function adds a new thermal cooling device (fan/processor/...)
|
|
|
|
* to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself
|
|
|
|
* to all the thermal zone devices registered at the same time.
|
|
|
|
*
|
|
|
|
* Return: a pointer to the created struct thermal_cooling_device or an
|
|
|
|
* ERR_PTR. Caller must check return value with IS_ERR*() helpers.
|
|
|
|
*/
|
|
|
|
struct thermal_cooling_device *
|
2019-04-19 00:36:39 +08:00
|
|
|
thermal_cooling_device_register(const char *type, void *devdata,
|
2013-09-27 03:55:01 +08:00
|
|
|
const struct thermal_cooling_device_ops *ops)
|
|
|
|
{
|
|
|
|
return __thermal_cooling_device_register(NULL, type, devdata, ops);
|
|
|
|
}
|
2013-04-24 05:48:15 +08:00
|
|
|
EXPORT_SYMBOL_GPL(thermal_cooling_device_register);
|
2008-01-17 15:51:08 +08:00
|
|
|
|
2013-09-27 03:55:01 +08:00
|
|
|
/**
|
|
|
|
* thermal_of_cooling_device_register() - register an OF thermal cooling device
|
|
|
|
* @np: a pointer to a device tree node.
|
|
|
|
* @type: the thermal cooling device type.
|
|
|
|
* @devdata: device private data.
|
|
|
|
* @ops: standard thermal cooling devices callbacks.
|
|
|
|
*
|
|
|
|
* This function will register a cooling device with device tree node reference.
|
|
|
|
* This interface function adds a new thermal cooling device (fan/processor/...)
|
|
|
|
* to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself
|
|
|
|
* to all the thermal zone devices registered at the same time.
|
|
|
|
*
|
|
|
|
* Return: a pointer to the created struct thermal_cooling_device or an
|
|
|
|
* ERR_PTR. Caller must check return value with IS_ERR*() helpers.
|
|
|
|
*/
|
|
|
|
struct thermal_cooling_device *
|
|
|
|
thermal_of_cooling_device_register(struct device_node *np,
|
2019-04-19 00:36:39 +08:00
|
|
|
const char *type, void *devdata,
|
2013-09-27 03:55:01 +08:00
|
|
|
const struct thermal_cooling_device_ops *ops)
|
|
|
|
{
|
|
|
|
return __thermal_cooling_device_register(np, type, devdata, ops);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(thermal_of_cooling_device_register);
|
|
|
|
|
2019-04-19 03:58:15 +08:00
|
|
|
static void thermal_cooling_device_release(struct device *dev, void *res)
|
|
|
|
{
|
|
|
|
thermal_cooling_device_unregister(
|
|
|
|
*(struct thermal_cooling_device **)res);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* devm_thermal_of_cooling_device_register() - register an OF thermal cooling
|
|
|
|
* device
|
|
|
|
* @dev: a valid struct device pointer of a sensor device.
|
|
|
|
* @np: a pointer to a device tree node.
|
|
|
|
* @type: the thermal cooling device type.
|
|
|
|
* @devdata: device private data.
|
|
|
|
* @ops: standard thermal cooling devices callbacks.
|
|
|
|
*
|
|
|
|
* This function will register a cooling device with device tree node reference.
|
|
|
|
* This interface function adds a new thermal cooling device (fan/processor/...)
|
|
|
|
* to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself
|
|
|
|
* to all the thermal zone devices registered at the same time.
|
|
|
|
*
|
|
|
|
* Return: a pointer to the created struct thermal_cooling_device or an
|
|
|
|
* ERR_PTR. Caller must check return value with IS_ERR*() helpers.
|
|
|
|
*/
|
|
|
|
struct thermal_cooling_device *
|
|
|
|
devm_thermal_of_cooling_device_register(struct device *dev,
|
|
|
|
struct device_node *np,
|
|
|
|
char *type, void *devdata,
|
|
|
|
const struct thermal_cooling_device_ops *ops)
|
|
|
|
{
|
|
|
|
struct thermal_cooling_device **ptr, *tcd;
|
|
|
|
|
|
|
|
ptr = devres_alloc(thermal_cooling_device_release, sizeof(*ptr),
|
|
|
|
GFP_KERNEL);
|
|
|
|
if (!ptr)
|
|
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
|
|
|
|
tcd = __thermal_cooling_device_register(np, type, devdata, ops);
|
|
|
|
if (IS_ERR(tcd)) {
|
|
|
|
devres_free(ptr);
|
|
|
|
return tcd;
|
|
|
|
}
|
|
|
|
|
|
|
|
*ptr = tcd;
|
|
|
|
devres_add(dev, ptr);
|
|
|
|
|
|
|
|
return tcd;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(devm_thermal_of_cooling_device_register);
|
|
|
|
|
2016-11-08 13:09:08 +08:00
|
|
|
static void __unbind(struct thermal_zone_device *tz, int mask,
|
|
|
|
struct thermal_cooling_device *cdev)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < tz->trips; i++)
|
|
|
|
if (mask & (1 << i))
|
|
|
|
thermal_zone_unbind_cooling_device(tz, i, cdev);
|
|
|
|
}
|
|
|
|
|
2008-01-17 15:51:08 +08:00
|
|
|
/**
|
2016-11-08 13:09:24 +08:00
|
|
|
* thermal_cooling_device_unregister - removes a thermal cooling device
|
2008-01-17 15:51:08 +08:00
|
|
|
* @cdev: the thermal cooling device to remove.
|
|
|
|
*
|
2016-11-08 13:09:24 +08:00
|
|
|
* thermal_cooling_device_unregister() must be called when a registered
|
|
|
|
* thermal cooling device is no longer needed.
|
2008-01-17 15:51:08 +08:00
|
|
|
*/
|
2012-09-18 13:34:59 +08:00
|
|
|
void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev)
|
2008-01-17 15:51:08 +08:00
|
|
|
{
|
2012-09-18 13:34:59 +08:00
|
|
|
int i;
|
|
|
|
const struct thermal_zone_params *tzp;
|
2008-01-17 15:51:08 +08:00
|
|
|
struct thermal_zone_device *tz;
|
|
|
|
struct thermal_cooling_device *pos = NULL;
|
|
|
|
|
|
|
|
if (!cdev)
|
|
|
|
return;
|
|
|
|
|
|
|
|
mutex_lock(&thermal_list_lock);
|
|
|
|
list_for_each_entry(pos, &thermal_cdev_list, node)
|
2016-11-08 13:09:23 +08:00
|
|
|
if (pos == cdev)
|
|
|
|
break;
|
2008-01-17 15:51:08 +08:00
|
|
|
if (pos != cdev) {
|
|
|
|
/* thermal cooling device not found */
|
|
|
|
mutex_unlock(&thermal_list_lock);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
list_del(&cdev->node);
|
2012-09-18 13:34:59 +08:00
|
|
|
|
|
|
|
/* Unbind all thermal zones associated with 'this' cdev */
|
2008-01-17 15:51:08 +08:00
|
|
|
list_for_each_entry(tz, &thermal_tz_list, node) {
|
2012-09-18 13:34:59 +08:00
|
|
|
if (tz->ops->unbind) {
|
|
|
|
tz->ops->unbind(tz, cdev);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!tz->tzp || !tz->tzp->tbp)
|
2008-01-17 15:51:08 +08:00
|
|
|
continue;
|
2012-09-18 13:34:59 +08:00
|
|
|
|
|
|
|
tzp = tz->tzp;
|
|
|
|
for (i = 0; i < tzp->num_tbps; i++) {
|
|
|
|
if (tzp->tbp[i].cdev == cdev) {
|
|
|
|
__unbind(tz, tzp->tbp[i].trip_mask, cdev);
|
|
|
|
tzp->tbp[i].cdev = NULL;
|
|
|
|
}
|
|
|
|
}
|
2008-01-17 15:51:08 +08:00
|
|
|
}
|
2012-09-18 13:34:59 +08:00
|
|
|
|
2008-01-17 15:51:08 +08:00
|
|
|
mutex_unlock(&thermal_list_lock);
|
2012-09-18 13:34:59 +08:00
|
|
|
|
2016-12-22 01:47:03 +08:00
|
|
|
ida_simple_remove(&thermal_cdev_ida, cdev->id);
|
2018-08-14 01:14:00 +08:00
|
|
|
device_del(&cdev->device);
|
2018-04-02 18:56:25 +08:00
|
|
|
thermal_cooling_device_destroy_sysfs(cdev);
|
2021-03-14 19:13:29 +08:00
|
|
|
kfree(cdev->type);
|
2018-08-14 01:14:00 +08:00
|
|
|
put_device(&cdev->device);
|
2008-01-17 15:51:08 +08:00
|
|
|
}
|
2013-04-24 05:48:15 +08:00
|
|
|
EXPORT_SYMBOL_GPL(thermal_cooling_device_unregister);
|
2008-01-17 15:51:08 +08:00
|
|
|
|
2016-11-08 13:09:10 +08:00
|
|
|
static void bind_tz(struct thermal_zone_device *tz)
|
2012-06-27 14:13:04 +08:00
|
|
|
{
|
2016-11-08 13:09:10 +08:00
|
|
|
int i, ret;
|
|
|
|
struct thermal_cooling_device *pos = NULL;
|
|
|
|
const struct thermal_zone_params *tzp = tz->tzp;
|
2012-06-27 14:13:04 +08:00
|
|
|
|
2016-11-08 13:09:10 +08:00
|
|
|
if (!tzp && !tz->ops->bind)
|
2012-06-27 14:13:04 +08:00
|
|
|
return;
|
2012-07-25 10:10:58 +08:00
|
|
|
|
2016-11-08 13:09:10 +08:00
|
|
|
mutex_lock(&thermal_list_lock);
|
2012-07-25 10:10:58 +08:00
|
|
|
|
2016-11-08 13:09:10 +08:00
|
|
|
/* If there is ops->bind, try to use ops->bind */
|
|
|
|
if (tz->ops->bind) {
|
|
|
|
list_for_each_entry(pos, &thermal_cdev_list, node) {
|
|
|
|
ret = tz->ops->bind(tz, pos);
|
|
|
|
if (ret)
|
|
|
|
print_bind_err_msg(tz, pos, ret);
|
2012-07-25 10:10:59 +08:00
|
|
|
}
|
2016-11-08 13:09:10 +08:00
|
|
|
goto exit;
|
2012-07-25 10:10:59 +08:00
|
|
|
}
|
2012-07-25 10:10:58 +08:00
|
|
|
|
2016-11-08 13:09:10 +08:00
|
|
|
if (!tzp || !tzp->tbp)
|
|
|
|
goto exit;
|
2012-07-25 10:10:59 +08:00
|
|
|
|
2016-11-08 13:09:10 +08:00
|
|
|
list_for_each_entry(pos, &thermal_cdev_list, node) {
|
|
|
|
for (i = 0; i < tzp->num_tbps; i++) {
|
|
|
|
if (tzp->tbp[i].cdev || !tzp->tbp[i].match)
|
|
|
|
continue;
|
|
|
|
if (tzp->tbp[i].match(tz, pos))
|
|
|
|
continue;
|
|
|
|
tzp->tbp[i].cdev = pos;
|
|
|
|
__bind(tz, tzp->tbp[i].trip_mask, pos,
|
|
|
|
tzp->tbp[i].binding_limits,
|
|
|
|
tzp->tbp[i].weight);
|
2012-07-25 10:10:59 +08:00
|
|
|
}
|
2012-07-25 10:10:58 +08:00
|
|
|
}
|
2016-11-08 13:09:10 +08:00
|
|
|
exit:
|
|
|
|
mutex_unlock(&thermal_list_lock);
|
2012-07-25 10:10:58 +08:00
|
|
|
}
|
|
|
|
|
2008-01-17 15:51:08 +08:00
|
|
|
/**
|
2013-04-24 05:48:20 +08:00
|
|
|
* thermal_zone_device_register() - register a new thermal zone device
|
2008-01-17 15:51:08 +08:00
|
|
|
* @type: the thermal zone device type
|
|
|
|
* @trips: the number of trip points the thermal zone support
|
2012-07-25 10:10:58 +08:00
|
|
|
* @mask: a bit string indicating the writeablility of trip points
|
2008-01-17 15:51:08 +08:00
|
|
|
* @devdata: private device data
|
|
|
|
* @ops: standard thermal zone device callbacks
|
2012-09-18 13:34:56 +08:00
|
|
|
* @tzp: thermal zone platform parameters
|
2008-12-04 01:55:32 +08:00
|
|
|
* @passive_delay: number of milliseconds to wait between polls when
|
|
|
|
* performing passive cooling
|
|
|
|
* @polling_delay: number of milliseconds to wait between polls when checking
|
|
|
|
* whether trip points have been crossed (0 for interrupt
|
|
|
|
* driven systems)
|
2008-01-17 15:51:08 +08:00
|
|
|
*
|
2013-04-24 05:48:20 +08:00
|
|
|
* This interface function adds a new thermal zone device (sensor) to
|
|
|
|
* /sys/class/thermal folder as thermal_zone[0-*]. It tries to bind all the
|
|
|
|
* thermal cooling devices registered at the same time.
|
2008-01-17 15:51:08 +08:00
|
|
|
* thermal_zone_device_unregister() must be called when the device is no
|
2012-06-27 09:51:12 +08:00
|
|
|
* longer needed. The passive cooling depends on the .get_trend() return value.
|
2013-04-24 05:48:20 +08:00
|
|
|
*
|
|
|
|
* Return: a pointer to the created struct thermal_zone_device or an
|
|
|
|
* in case of error, an ERR_PTR. Caller must check return value with
|
|
|
|
* IS_ERR*() helpers.
|
2008-01-17 15:51:08 +08:00
|
|
|
*/
|
2016-11-08 13:09:21 +08:00
|
|
|
struct thermal_zone_device *
|
|
|
|
thermal_zone_device_register(const char *type, int trips, int mask,
|
|
|
|
void *devdata, struct thermal_zone_device_ops *ops,
|
|
|
|
struct thermal_zone_params *tzp, int passive_delay,
|
|
|
|
int polling_delay)
|
2008-01-17 15:51:08 +08:00
|
|
|
{
|
|
|
|
struct thermal_zone_device *tz;
|
2008-12-04 02:00:38 +08:00
|
|
|
enum thermal_trip_type trip_type;
|
2016-03-18 10:03:24 +08:00
|
|
|
int trip_temp;
|
2019-08-07 11:01:30 +08:00
|
|
|
int id;
|
2008-01-17 15:51:08 +08:00
|
|
|
int result;
|
|
|
|
int count;
|
2015-02-27 03:00:27 +08:00
|
|
|
struct thermal_governor *governor;
|
2008-01-17 15:51:08 +08:00
|
|
|
|
2019-07-12 04:31:58 +08:00
|
|
|
if (!type || strlen(type) == 0) {
|
|
|
|
pr_err("Error: No thermal zone type defined\n");
|
2016-11-08 13:08:39 +08:00
|
|
|
return ERR_PTR(-EINVAL);
|
2019-07-12 04:31:58 +08:00
|
|
|
}
|
2016-11-08 13:08:39 +08:00
|
|
|
|
2019-07-12 04:31:58 +08:00
|
|
|
if (type && strlen(type) >= THERMAL_NAME_LENGTH) {
|
|
|
|
pr_err("Error: Thermal zone name (%s) too long, should be under %d chars\n",
|
|
|
|
type, THERMAL_NAME_LENGTH);
|
2008-02-15 13:59:50 +08:00
|
|
|
return ERR_PTR(-EINVAL);
|
2019-07-12 04:31:58 +08:00
|
|
|
}
|
2008-01-17 15:51:08 +08:00
|
|
|
|
2019-07-12 04:31:58 +08:00
|
|
|
if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) {
|
|
|
|
pr_err("Error: Incorrect number of thermal trips\n");
|
2008-02-15 13:59:50 +08:00
|
|
|
return ERR_PTR(-EINVAL);
|
2019-07-12 04:31:58 +08:00
|
|
|
}
|
2008-01-17 15:51:08 +08:00
|
|
|
|
2019-07-12 04:31:58 +08:00
|
|
|
if (!ops) {
|
|
|
|
pr_err("Error: Thermal zone device ops not defined\n");
|
2008-02-15 13:59:50 +08:00
|
|
|
return ERR_PTR(-EINVAL);
|
2019-07-12 04:31:58 +08:00
|
|
|
}
|
2008-01-17 15:51:08 +08:00
|
|
|
|
2013-05-18 17:50:26 +08:00
|
|
|
if (trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp))
|
2013-01-02 23:29:42 +08:00
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
|
2016-11-08 13:09:25 +08:00
|
|
|
tz = kzalloc(sizeof(*tz), GFP_KERNEL);
|
2008-01-17 15:51:08 +08:00
|
|
|
if (!tz)
|
2008-02-15 13:59:50 +08:00
|
|
|
return ERR_PTR(-ENOMEM);
|
2008-01-17 15:51:08 +08:00
|
|
|
|
2012-06-27 10:09:00 +08:00
|
|
|
INIT_LIST_HEAD(&tz->thermal_instances);
|
2016-12-22 01:47:03 +08:00
|
|
|
ida_init(&tz->ida);
|
2008-01-17 15:51:08 +08:00
|
|
|
mutex_init(&tz->lock);
|
2019-08-07 11:01:30 +08:00
|
|
|
id = ida_simple_get(&thermal_tz_ida, 0, 0, GFP_KERNEL);
|
|
|
|
if (id < 0) {
|
|
|
|
result = id;
|
2017-08-08 22:39:54 +08:00
|
|
|
goto free_tz;
|
2019-08-07 11:01:30 +08:00
|
|
|
}
|
2008-01-17 15:51:08 +08:00
|
|
|
|
2019-08-07 11:01:30 +08:00
|
|
|
tz->id = id;
|
2016-11-08 13:08:39 +08:00
|
|
|
strlcpy(tz->type, type, sizeof(tz->type));
|
2020-12-10 20:15:11 +08:00
|
|
|
|
|
|
|
if (!ops->critical)
|
|
|
|
ops->critical = thermal_zone_device_critical;
|
|
|
|
|
2008-01-17 15:51:08 +08:00
|
|
|
tz->ops = ops;
|
2012-09-18 13:34:56 +08:00
|
|
|
tz->tzp = tzp;
|
2008-01-17 15:51:08 +08:00
|
|
|
tz->device.class = &thermal_class;
|
|
|
|
tz->devdata = devdata;
|
|
|
|
tz->trips = trips;
|
2016-11-08 13:08:42 +08:00
|
|
|
|
2020-12-17 06:03:35 +08:00
|
|
|
thermal_set_delay_jiffies(&tz->passive_delay_jiffies, passive_delay);
|
|
|
|
thermal_set_delay_jiffies(&tz->polling_delay_jiffies, polling_delay);
|
|
|
|
|
2016-11-08 13:08:52 +08:00
|
|
|
/* sys I/F */
|
2016-11-08 13:08:42 +08:00
|
|
|
/* Add nodes that are always present via .groups */
|
2016-11-08 13:08:52 +08:00
|
|
|
result = thermal_zone_create_device_groups(tz, mask);
|
|
|
|
if (result)
|
2017-08-08 22:39:54 +08:00
|
|
|
goto remove_id;
|
2016-11-08 13:08:52 +08:00
|
|
|
|
2015-10-30 16:32:10 +08:00
|
|
|
/* A new thermal zone needs to be updated anyway. */
|
|
|
|
atomic_set(&tz->need_update, 1);
|
2008-12-04 01:55:32 +08:00
|
|
|
|
2009-01-07 02:44:37 +08:00
|
|
|
dev_set_name(&tz->device, "thermal_zone%d", tz->id);
|
2008-01-17 15:51:08 +08:00
|
|
|
result = device_register(&tz->device);
|
2017-08-08 22:39:54 +08:00
|
|
|
if (result)
|
2019-08-07 11:01:30 +08:00
|
|
|
goto release_device;
|
2008-01-17 15:51:08 +08:00
|
|
|
|
|
|
|
for (count = 0; count < trips; count++) {
|
2020-10-27 09:37:42 +08:00
|
|
|
if (tz->ops->get_trip_type(tz, count, &trip_type) ||
|
|
|
|
tz->ops->get_trip_temp(tz, count, &trip_temp) ||
|
|
|
|
!trip_temp)
|
2016-03-18 10:03:24 +08:00
|
|
|
set_bit(count, &tz->trips_disabled);
|
2008-01-17 15:51:08 +08:00
|
|
|
}
|
|
|
|
|
2012-09-18 13:34:57 +08:00
|
|
|
/* Update 'this' zone's governor information */
|
|
|
|
mutex_lock(&thermal_governor_lock);
|
|
|
|
|
|
|
|
if (tz->tzp)
|
2015-02-27 03:00:27 +08:00
|
|
|
governor = __find_governor(tz->tzp->governor_name);
|
2012-09-18 13:34:57 +08:00
|
|
|
else
|
2015-02-27 03:00:27 +08:00
|
|
|
governor = def_governor;
|
|
|
|
|
|
|
|
result = thermal_set_governor(tz, governor);
|
|
|
|
if (result) {
|
|
|
|
mutex_unlock(&thermal_governor_lock);
|
|
|
|
goto unregister;
|
|
|
|
}
|
2012-09-18 13:34:57 +08:00
|
|
|
|
|
|
|
mutex_unlock(&thermal_governor_lock);
|
|
|
|
|
2013-08-15 23:34:17 +08:00
|
|
|
if (!tz->tzp || !tz->tzp->no_hwmon) {
|
|
|
|
result = thermal_add_hwmon_sysfs(tz);
|
|
|
|
if (result)
|
|
|
|
goto unregister;
|
|
|
|
}
|
2008-04-21 16:07:52 +08:00
|
|
|
|
2008-01-17 15:51:08 +08:00
|
|
|
mutex_lock(&thermal_list_lock);
|
|
|
|
list_add_tail(&tz->node, &thermal_tz_list);
|
|
|
|
mutex_unlock(&thermal_list_lock);
|
|
|
|
|
2012-09-18 13:34:59 +08:00
|
|
|
/* Bind cooling devices for this zone */
|
|
|
|
bind_tz(tz);
|
|
|
|
|
2016-11-08 13:09:23 +08:00
|
|
|
INIT_DELAYED_WORK(&tz->poll_queue, thermal_zone_device_check);
|
2008-12-04 01:55:32 +08:00
|
|
|
|
2020-12-23 02:11:10 +08:00
|
|
|
thermal_zone_device_init(tz);
|
2015-10-30 16:32:10 +08:00
|
|
|
/* Update the new thermal zone and mark it as already updated. */
|
|
|
|
if (atomic_cmpxchg(&tz->need_update, 1, 0))
|
2016-08-27 07:21:16 +08:00
|
|
|
thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED);
|
2008-12-04 01:55:32 +08:00
|
|
|
|
2020-07-06 18:55:38 +08:00
|
|
|
thermal_notify_tz_create(tz->id, tz->type);
|
|
|
|
|
2014-10-28 15:40:25 +08:00
|
|
|
return tz;
|
2008-01-17 15:51:08 +08:00
|
|
|
|
2012-03-22 03:55:02 +08:00
|
|
|
unregister:
|
2019-08-07 11:01:30 +08:00
|
|
|
device_del(&tz->device);
|
|
|
|
release_device:
|
|
|
|
put_device(&tz->device);
|
|
|
|
tz = NULL;
|
2017-08-08 22:39:54 +08:00
|
|
|
remove_id:
|
2019-08-07 11:01:30 +08:00
|
|
|
ida_simple_remove(&thermal_tz_ida, id);
|
2017-08-08 22:39:54 +08:00
|
|
|
free_tz:
|
|
|
|
kfree(tz);
|
|
|
|
return ERR_PTR(result);
|
2008-01-17 15:51:08 +08:00
|
|
|
}
|
2013-04-24 05:48:15 +08:00
|
|
|
EXPORT_SYMBOL_GPL(thermal_zone_device_register);
|
2008-01-17 15:51:08 +08:00
|
|
|
|
|
|
|
/**
|
2021-05-17 13:10:20 +08:00
|
|
|
* thermal_zone_device_unregister - removes the registered thermal zone device
|
2008-01-17 15:51:08 +08:00
|
|
|
* @tz: the thermal zone device to remove
|
|
|
|
*/
|
|
|
|
void thermal_zone_device_unregister(struct thermal_zone_device *tz)
|
|
|
|
{
|
2020-08-18 07:58:54 +08:00
|
|
|
int i, tz_id;
|
2012-09-18 13:34:59 +08:00
|
|
|
const struct thermal_zone_params *tzp;
|
2008-01-17 15:51:08 +08:00
|
|
|
struct thermal_cooling_device *cdev;
|
|
|
|
struct thermal_zone_device *pos = NULL;
|
|
|
|
|
|
|
|
if (!tz)
|
|
|
|
return;
|
|
|
|
|
2012-09-18 13:34:59 +08:00
|
|
|
tzp = tz->tzp;
|
2020-08-18 07:58:54 +08:00
|
|
|
tz_id = tz->id;
|
2012-09-18 13:34:59 +08:00
|
|
|
|
2008-01-17 15:51:08 +08:00
|
|
|
mutex_lock(&thermal_list_lock);
|
|
|
|
list_for_each_entry(pos, &thermal_tz_list, node)
|
2016-11-08 13:09:23 +08:00
|
|
|
if (pos == tz)
|
|
|
|
break;
|
2008-01-17 15:51:08 +08:00
|
|
|
if (pos != tz) {
|
|
|
|
/* thermal zone device not found */
|
|
|
|
mutex_unlock(&thermal_list_lock);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
list_del(&tz->node);
|
2012-09-18 13:34:59 +08:00
|
|
|
|
|
|
|
/* Unbind all cdevs associated with 'this' thermal zone */
|
|
|
|
list_for_each_entry(cdev, &thermal_cdev_list, node) {
|
|
|
|
if (tz->ops->unbind) {
|
|
|
|
tz->ops->unbind(tz, cdev);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!tzp || !tzp->tbp)
|
|
|
|
break;
|
|
|
|
|
|
|
|
for (i = 0; i < tzp->num_tbps; i++) {
|
|
|
|
if (tzp->tbp[i].cdev == cdev) {
|
|
|
|
__unbind(tz, tzp->tbp[i].trip_mask, cdev);
|
|
|
|
tzp->tbp[i].cdev = NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-01-17 15:51:08 +08:00
|
|
|
mutex_unlock(&thermal_list_lock);
|
|
|
|
|
2019-11-13 04:42:23 +08:00
|
|
|
cancel_delayed_work_sync(&tz->poll_queue);
|
2008-12-04 01:55:32 +08:00
|
|
|
|
2015-02-27 03:00:27 +08:00
|
|
|
thermal_set_governor(tz, NULL);
|
2008-01-17 15:51:08 +08:00
|
|
|
|
2008-04-21 16:07:52 +08:00
|
|
|
thermal_remove_hwmon_sysfs(tz);
|
2016-12-22 01:47:03 +08:00
|
|
|
ida_simple_remove(&thermal_tz_ida, tz->id);
|
|
|
|
ida_destroy(&tz->ida);
|
2008-01-17 15:51:08 +08:00
|
|
|
mutex_destroy(&tz->lock);
|
|
|
|
device_unregister(&tz->device);
|
2020-07-06 18:55:38 +08:00
|
|
|
|
2020-08-18 07:58:54 +08:00
|
|
|
thermal_notify_tz_delete(tz_id);
|
2008-01-17 15:51:08 +08:00
|
|
|
}
|
2013-04-24 05:48:15 +08:00
|
|
|
EXPORT_SYMBOL_GPL(thermal_zone_device_unregister);
|
2008-01-17 15:51:08 +08:00
|
|
|
|
2013-04-05 20:32:28 +08:00
|
|
|
/**
|
|
|
|
* thermal_zone_get_zone_by_name() - search for a zone and returns its ref
|
|
|
|
* @name: thermal zone name to fetch the temperature
|
|
|
|
*
|
|
|
|
* When only one zone is found with the passed name, returns a reference to it.
|
|
|
|
*
|
|
|
|
* Return: On success returns a reference to an unique thermal zone with
|
|
|
|
* matching name equals to @name, an ERR_PTR otherwise (-EINVAL for invalid
|
|
|
|
* paramenters, -ENODEV for not found and -EEXIST for multiple matches).
|
|
|
|
*/
|
|
|
|
struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name)
|
|
|
|
{
|
|
|
|
struct thermal_zone_device *pos = NULL, *ref = ERR_PTR(-EINVAL);
|
|
|
|
unsigned int found = 0;
|
|
|
|
|
|
|
|
if (!name)
|
|
|
|
goto exit;
|
|
|
|
|
|
|
|
mutex_lock(&thermal_list_lock);
|
|
|
|
list_for_each_entry(pos, &thermal_tz_list, node)
|
2014-10-14 06:55:01 +08:00
|
|
|
if (!strncasecmp(name, pos->type, THERMAL_NAME_LENGTH)) {
|
2013-04-05 20:32:28 +08:00
|
|
|
found++;
|
|
|
|
ref = pos;
|
|
|
|
}
|
|
|
|
mutex_unlock(&thermal_list_lock);
|
|
|
|
|
|
|
|
/* nothing has been found, thus an error code for it */
|
|
|
|
if (found == 0)
|
|
|
|
ref = ERR_PTR(-ENODEV);
|
|
|
|
else if (found > 1)
|
|
|
|
/* Success only when an unique zone is found */
|
|
|
|
ref = ERR_PTR(-EEXIST);
|
|
|
|
|
|
|
|
exit:
|
|
|
|
return ref;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(thermal_zone_get_zone_by_name);
|
|
|
|
|
2015-10-30 16:31:58 +08:00
|
|
|
static int thermal_pm_notify(struct notifier_block *nb,
|
2016-11-08 13:09:21 +08:00
|
|
|
unsigned long mode, void *_unused)
|
2015-10-30 16:31:58 +08:00
|
|
|
{
|
|
|
|
struct thermal_zone_device *tz;
|
|
|
|
|
|
|
|
switch (mode) {
|
|
|
|
case PM_HIBERNATION_PREPARE:
|
|
|
|
case PM_RESTORE_PREPARE:
|
|
|
|
case PM_SUSPEND_PREPARE:
|
|
|
|
atomic_set(&in_suspend, 1);
|
|
|
|
break;
|
|
|
|
case PM_POST_HIBERNATION:
|
|
|
|
case PM_POST_RESTORE:
|
|
|
|
case PM_POST_SUSPEND:
|
|
|
|
atomic_set(&in_suspend, 0);
|
|
|
|
list_for_each_entry(tz, &thermal_tz_list, node) {
|
thermal: Use mode helpers in drivers
Use thermal_zone_device_{en|dis}able() and thermal_zone_device_is_enabled().
Consequently, all set_mode() implementations in drivers:
- can stop modifying tzd's "mode" member,
- shall stop taking tzd's lock, as it is taken in the helpers
- shall stop calling thermal_zone_device_update() as it is called in the
helpers
- can assume they are called when the mode truly changes, so checks to
verify that can be dropped
Not providing set_mode() by a driver no longer prevents the core from
being able to set tzd's mode, so the relevant check in mode_store() is
removed.
Other comments:
- acpi/thermal.c: tz->thermal_zone->mode will be updated only after we
return from set_mode(), so use function parameter in thermal_set_mode()
instead, no need to call acpi_thermal_check() in set_mode()
- thermal/imx_thermal.c: regmap writes and mode assignment are done in
thermal_zone_device_{en|dis}able() and set_mode() callback
- thermal/intel/intel_quark_dts_thermal.c: soc_dts_{en|dis}able() are a
part of set_mode() callback, so they don't need to modify tzd->mode, and
don't need to fall back to the opposite mode if unsuccessful, as the return
value will be propagated to thermal_zone_device_{en|dis}able() and
ultimately tzd's member will not be changed in thermal_zone_device_set_mode().
- thermal/of-thermal.c: no need to set zone->mode to DISABLED in
of_parse_thermal_zones() as a tzd is kzalloc'ed so mode is DISABLED anyway
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
[for acerhdf]
Acked-by: Peter Kaestle <peter@piie.net>
Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20200629122925.21729-8-andrzej.p@collabora.com
2020-06-29 20:29:21 +08:00
|
|
|
if (!thermal_zone_device_is_enabled(tz))
|
2019-04-17 01:07:01 +08:00
|
|
|
continue;
|
|
|
|
|
2018-11-08 06:36:11 +08:00
|
|
|
thermal_zone_device_init(tz);
|
2016-08-27 07:21:16 +08:00
|
|
|
thermal_zone_device_update(tz,
|
|
|
|
THERMAL_EVENT_UNSPECIFIED);
|
2015-10-30 16:31:58 +08:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct notifier_block thermal_pm_nb = {
|
|
|
|
.notifier_call = thermal_pm_notify,
|
|
|
|
};
|
|
|
|
|
2008-01-17 15:51:08 +08:00
|
|
|
static int __init thermal_init(void)
|
|
|
|
{
|
2013-03-26 16:38:29 +08:00
|
|
|
int result;
|
|
|
|
|
2020-07-18 00:42:16 +08:00
|
|
|
result = thermal_netlink_init();
|
|
|
|
if (result)
|
|
|
|
goto error;
|
|
|
|
|
2013-03-26 16:38:29 +08:00
|
|
|
result = thermal_register_governors();
|
|
|
|
if (result)
|
|
|
|
goto error;
|
2008-01-17 15:51:08 +08:00
|
|
|
|
|
|
|
result = class_register(&thermal_class);
|
2013-03-26 16:38:29 +08:00
|
|
|
if (result)
|
|
|
|
goto unregister_governors;
|
|
|
|
|
2013-07-04 03:35:39 +08:00
|
|
|
result = of_parse_thermal_zones();
|
|
|
|
if (result)
|
2019-10-21 20:15:10 +08:00
|
|
|
goto unregister_class;
|
2013-07-04 03:35:39 +08:00
|
|
|
|
2015-10-30 16:31:58 +08:00
|
|
|
result = register_pm_notifier(&thermal_pm_nb);
|
|
|
|
if (result)
|
|
|
|
pr_warn("Thermal: Can not register suspend notifier, return %d\n",
|
|
|
|
result);
|
|
|
|
|
2013-03-26 16:38:29 +08:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
unregister_class:
|
|
|
|
class_unregister(&thermal_class);
|
2014-12-04 05:20:21 +08:00
|
|
|
unregister_governors:
|
|
|
|
thermal_unregister_governors();
|
2013-03-26 16:38:29 +08:00
|
|
|
error:
|
2016-12-22 01:47:03 +08:00
|
|
|
ida_destroy(&thermal_tz_ida);
|
|
|
|
ida_destroy(&thermal_cdev_ida);
|
2013-03-26 16:38:29 +08:00
|
|
|
mutex_destroy(&thermal_list_lock);
|
|
|
|
mutex_destroy(&thermal_governor_lock);
|
2008-01-17 15:51:08 +08:00
|
|
|
return result;
|
|
|
|
}
|
2020-07-18 00:42:17 +08:00
|
|
|
postcore_initcall(thermal_init);
|