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Date: Mon, 1 Apr 2013 08:43:39 -0400
From: Eduardo Valentin <eduardo.valentin@...com>
To: Zhang Rui <rui.zhang@...el.com>
CC: <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<amit.daniel@...sung.com>, <durgadoss.r@...el.com>, <andi@...as.de>
Subject: Re: [RFC,1/5] Thermal: rename thermal_sys.c to thermal_core.c
Hey Rui,
On 27-03-2013 22:40, Zhang Rui wrote:
> On Tue, 2013-03-26 at 18:04 -0400, Eduardo Valentin wrote:
>> Hi Rui,
>>
>> A side note:
>> I'd really appreciate if you could copy on your patches on
>> drivers/thermal/. I had some issues with TI server and got un subscribed
>> from linux-pm. Now I will try to catch up any way,
>>
> sure.
>
>> Some comments.
>>
>> On 26-03-2013 12:26, Zhang Rui wrote:
>>> No functional change in this patch.
>>>
>>
>> Just a better description would also help on code version control.
>>
> will add it in V2.
>
>>> Signed-off-by: Zhang Rui <rui.zhang@...el.com>
>>
>> Apart from minor comments, I agreed with this change. So feel free to
>> add my:
>>
>> Acked-by: Eduardo Valentin <eduardo.valentin@...com>
>>
> thanks!
>
>>>
>>> ---
>>> drivers/thermal/Makefile | 1 +
>>> drivers/thermal/thermal_core.c | 1888 ++++++++++++++++++++++++++++++++++++++++
>>> drivers/thermal/thermal_sys.c | 1888 ----------------------------------------
>>
>> When sending renames, use git format-patch --find-renames, it makes a
>> better summary of what you have done, specially if you have changed
>> something in the file while renaming.
>>
> a useful tip. thanks!
>>> 3 files changed, 1889 insertions(+), 1888 deletions(-)
>>> create mode 100644 drivers/thermal/thermal_core.c
>>> delete mode 100644 drivers/thermal/thermal_sys.c
>>>
>>> diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile
>>> index d3a2b38..b2009bd 100644
>>> --- a/drivers/thermal/Makefile
>>> +++ b/drivers/thermal/Makefile
>>> @@ -3,6 +3,7 @@
>>> #
>>>
>>> obj-$(CONFIG_THERMAL) += thermal_sys.o
>>
>> I know this is for fixing the annoying bug with fan max speed. But while
>> still here, do you think 'thermal_sys' is a good name for thermal
>> framework driver? Maybe just 'thermal' would suffice?
>>
> as I said, there is already a thermal driver, aka,
> driver/acpi/thermal.c.
>
In fact there is. On the other hand, it does not imply that this naming
convention is correct, right?
Unless you have a strong requirement to name these drivers the way it
is, I'd suggest to take the opportunity to rename them.
drivers/acpi/thermal.c could be named 'thermal-acpi.ko', if this does
not violate any ACPI requirements. While this driver,
drivers/thermal/thermal_sys.c, would be named only 'thermal.ko'.
> thanks,
Regards,
Ed
> rui
>>> +thermal_sys-y += thermal_core.o
>>>
>>> # governors
>>> obj-$(CONFIG_THERMAL_GOV_FAIR_SHARE) += fair_share.o
>>> diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
>>> new file mode 100644
>>> index 0000000..5b7863a
>>> --- /dev/null
>>> +++ b/drivers/thermal/thermal_core.c
>>> @@ -0,0 +1,1888 @@
>>> +/*
>>> + * thermal.c - Generic Thermal Management Sysfs support.
>>> + *
>>> + * Copyright (C) 2008 Intel Corp
>>> + * Copyright (C) 2008 Zhang Rui <rui.zhang@...el.com>
>>> + * Copyright (C) 2008 Sujith Thomas <sujith.thomas@...el.com>
>>> + *
>>> + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>> + *
>>> + * This program is free software; you can redistribute it and/or modify
>>> + * it under the terms of the GNU General Public License as published by
>>> + * the Free Software Foundation; version 2 of the License.
>>> + *
>>> + * This program is distributed in the hope that it will be useful, but
>>> + * WITHOUT ANY WARRANTY; without even the implied warranty of
>>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>>> + * General Public License for more details.
>>> + *
>>> + * You should have received a copy of the GNU General Public License along
>>> + * with this program; if not, write to the Free Software Foundation, Inc.,
>>> + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
>>> + *
>>> + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>> + */
>>> +
>>> +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
>>> +
>>> +#include <linux/module.h>
>>> +#include <linux/device.h>
>>> +#include <linux/err.h>
>>> +#include <linux/slab.h>
>>> +#include <linux/kdev_t.h>
>>> +#include <linux/idr.h>
>>> +#include <linux/thermal.h>
>>> +#include <linux/reboot.h>
>>> +#include <net/netlink.h>
>>> +#include <net/genetlink.h>
>>> +
>>> +#include "thermal_core.h"
>>> +
>>> +MODULE_AUTHOR("Zhang Rui");
>>> +MODULE_DESCRIPTION("Generic thermal management sysfs support");
>>> +MODULE_LICENSE("GPL");
>>> +
>>> +static DEFINE_IDR(thermal_tz_idr);
>>> +static DEFINE_IDR(thermal_cdev_idr);
>>> +static DEFINE_MUTEX(thermal_idr_lock);
>>> +
>>> +static LIST_HEAD(thermal_tz_list);
>>> +static LIST_HEAD(thermal_cdev_list);
>>> +static LIST_HEAD(thermal_governor_list);
>>> +
>>> +static DEFINE_MUTEX(thermal_list_lock);
>>> +static DEFINE_MUTEX(thermal_governor_lock);
>>> +
>>> +static struct thermal_governor *__find_governor(const char *name)
>>> +{
>>> + struct thermal_governor *pos;
>>> +
>>> + list_for_each_entry(pos, &thermal_governor_list, governor_list)
>>> + if (!strnicmp(name, pos->name, THERMAL_NAME_LENGTH))
>>> + return pos;
>>> +
>>> + return NULL;
>>> +}
>>> +
>>> +int thermal_register_governor(struct thermal_governor *governor)
>>> +{
>>> + int err;
>>> + const char *name;
>>> + struct thermal_zone_device *pos;
>>> +
>>> + if (!governor)
>>> + return -EINVAL;
>>> +
>>> + mutex_lock(&thermal_governor_lock);
>>> +
>>> + err = -EBUSY;
>>> + if (__find_governor(governor->name) == NULL) {
>>> + err = 0;
>>> + list_add(&governor->governor_list, &thermal_governor_list);
>>> + }
>>> +
>>> + mutex_lock(&thermal_list_lock);
>>> +
>>> + list_for_each_entry(pos, &thermal_tz_list, node) {
>>> + if (pos->governor)
>>> + continue;
>>> + if (pos->tzp)
>>> + name = pos->tzp->governor_name;
>>> + else
>>> + name = DEFAULT_THERMAL_GOVERNOR;
>>> + if (!strnicmp(name, governor->name, THERMAL_NAME_LENGTH))
>>> + pos->governor = governor;
>>> + }
>>> +
>>> + mutex_unlock(&thermal_list_lock);
>>> + mutex_unlock(&thermal_governor_lock);
>>> +
>>> + return err;
>>> +}
>>> +EXPORT_SYMBOL_GPL(thermal_register_governor);
>>> +
>>> +void thermal_unregister_governor(struct thermal_governor *governor)
>>> +{
>>> + struct thermal_zone_device *pos;
>>> +
>>> + if (!governor)
>>> + return;
>>> +
>>> + mutex_lock(&thermal_governor_lock);
>>> +
>>> + if (__find_governor(governor->name) == NULL)
>>> + goto exit;
>>> +
>>> + mutex_lock(&thermal_list_lock);
>>> +
>>> + list_for_each_entry(pos, &thermal_tz_list, node) {
>>> + if (!strnicmp(pos->governor->name, governor->name,
>>> + THERMAL_NAME_LENGTH))
>>> + pos->governor = NULL;
>>> + }
>>> +
>>> + mutex_unlock(&thermal_list_lock);
>>> + list_del(&governor->governor_list);
>>> +exit:
>>> + mutex_unlock(&thermal_governor_lock);
>>> + return;
>>> +}
>>> +EXPORT_SYMBOL_GPL(thermal_unregister_governor);
>>> +
>>> +static int get_idr(struct idr *idr, struct mutex *lock, int *id)
>>> +{
>>> + int ret;
>>> +
>>> + if (lock)
>>> + mutex_lock(lock);
>>> + ret = idr_alloc(idr, NULL, 0, 0, GFP_KERNEL);
>>> + if (lock)
>>> + mutex_unlock(lock);
>>> + if (unlikely(ret < 0))
>>> + return ret;
>>> + *id = ret;
>>> + return 0;
>>> +}
>>> +
>>> +static void release_idr(struct idr *idr, struct mutex *lock, int id)
>>> +{
>>> + if (lock)
>>> + mutex_lock(lock);
>>> + idr_remove(idr, id);
>>> + if (lock)
>>> + mutex_unlock(lock);
>>> +}
>>> +
>>> +int get_tz_trend(struct thermal_zone_device *tz, int trip)
>>> +{
>>> + enum thermal_trend trend;
>>> +
>>> + if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) {
>>> + if (tz->temperature > tz->last_temperature)
>>> + trend = THERMAL_TREND_RAISING;
>>> + else if (tz->temperature < tz->last_temperature)
>>> + trend = THERMAL_TREND_DROPPING;
>>> + else
>>> + trend = THERMAL_TREND_STABLE;
>>> + }
>>> +
>>> + return trend;
>>> +}
>>> +EXPORT_SYMBOL(get_tz_trend);
>>> +
>>> +struct thermal_instance *get_thermal_instance(struct thermal_zone_device *tz,
>>> + struct thermal_cooling_device *cdev, int trip)
>>> +{
>>> + struct thermal_instance *pos = NULL;
>>> + struct thermal_instance *target_instance = NULL;
>>> +
>>> + mutex_lock(&tz->lock);
>>> + mutex_lock(&cdev->lock);
>>> +
>>> + list_for_each_entry(pos, &tz->thermal_instances, tz_node) {
>>> + if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
>>> + target_instance = pos;
>>> + break;
>>> + }
>>> + }
>>> +
>>> + mutex_unlock(&cdev->lock);
>>> + mutex_unlock(&tz->lock);
>>> +
>>> + return target_instance;
>>> +}
>>> +EXPORT_SYMBOL(get_thermal_instance);
>>> +
>>> +static void print_bind_err_msg(struct thermal_zone_device *tz,
>>> + struct thermal_cooling_device *cdev, int ret)
>>> +{
>>> + 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)
>>> +{
>>> + int i, ret;
>>> +
>>> + for (i = 0; i < tz->trips; i++) {
>>> + if (mask & (1 << i)) {
>>> + ret = thermal_zone_bind_cooling_device(tz, i, cdev,
>>> + THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
>>> + if (ret)
>>> + print_bind_err_msg(tz, cdev, ret);
>>> + }
>>> + }
>>> +}
>>> +
>>> +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);
>>> +}
>>> +
>>> +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->tzp && pos->ops->bind) {
>>> + ret = pos->ops->bind(pos, cdev);
>>> + if (ret)
>>> + print_bind_err_msg(pos, cdev, ret);
>>> + }
>>> +
>>> + 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);
>>> + }
>>> + }
>>> +
>>> + mutex_unlock(&thermal_list_lock);
>>> +}
>>> +
>>> +static void bind_tz(struct thermal_zone_device *tz)
>>> +{
>>> + int i, ret;
>>> + struct thermal_cooling_device *pos = NULL;
>>> + const struct thermal_zone_params *tzp = tz->tzp;
>>> +
>>> + if (!tzp && !tz->ops->bind)
>>> + return;
>>> +
>>> + mutex_lock(&thermal_list_lock);
>>> +
>>> + /* If there is no platform data, try to use ops->bind */
>>> + if (!tzp && 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);
>>> + }
>>> + goto exit;
>>> + }
>>> +
>>> + if (!tzp || !tzp->tbp)
>>> + goto exit;
>>> +
>>> + 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);
>>> + }
>>> + }
>>> +exit:
>>> + mutex_unlock(&thermal_list_lock);
>>> +}
>>> +
>>> +static void thermal_zone_device_set_polling(struct thermal_zone_device *tz,
>>> + int delay)
>>> +{
>>> + if (delay > 1000)
>>> + mod_delayed_work(system_freezable_wq, &tz->poll_queue,
>>> + round_jiffies(msecs_to_jiffies(delay)));
>>> + else if (delay)
>>> + mod_delayed_work(system_freezable_wq, &tz->poll_queue,
>>> + msecs_to_jiffies(delay));
>>> + else
>>> + cancel_delayed_work(&tz->poll_queue);
>>> +}
>>> +
>>> +static void monitor_thermal_zone(struct thermal_zone_device *tz)
>>> +{
>>> + mutex_lock(&tz->lock);
>>> +
>>> + if (tz->passive)
>>> + thermal_zone_device_set_polling(tz, tz->passive_delay);
>>> + else if (tz->polling_delay)
>>> + thermal_zone_device_set_polling(tz, tz->polling_delay);
>>> + else
>>> + thermal_zone_device_set_polling(tz, 0);
>>> +
>>> + mutex_unlock(&tz->lock);
>>> +}
>>> +
>>> +static void handle_non_critical_trips(struct thermal_zone_device *tz,
>>> + int trip, enum thermal_trip_type trip_type)
>>> +{
>>> + if (tz->governor)
>>> + tz->governor->throttle(tz, trip);
>>> +}
>>> +
>>> +static void handle_critical_trips(struct thermal_zone_device *tz,
>>> + int trip, enum thermal_trip_type trip_type)
>>> +{
>>> + long trip_temp;
>>> +
>>> + tz->ops->get_trip_temp(tz, trip, &trip_temp);
>>> +
>>> + /* If we have not crossed the trip_temp, we do not care. */
>>> + if (tz->temperature < trip_temp)
>>> + return;
>>> +
>>> + if (tz->ops->notify)
>>> + tz->ops->notify(tz, trip, trip_type);
>>> +
>>> + if (trip_type == THERMAL_TRIP_CRITICAL) {
>>> + dev_emerg(&tz->device,
>>> + "critical temperature reached(%d C),shutting down\n",
>>> + tz->temperature / 1000);
>>> + orderly_poweroff(true);
>>> + }
>>> +}
>>> +
>>> +static void handle_thermal_trip(struct thermal_zone_device *tz, int trip)
>>> +{
>>> + enum thermal_trip_type type;
>>> +
>>> + tz->ops->get_trip_type(tz, trip, &type);
>>> +
>>> + if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT)
>>> + handle_critical_trips(tz, trip, type);
>>> + else
>>> + handle_non_critical_trips(tz, trip, type);
>>> + /*
>>> + * Alright, we handled this trip successfully.
>>> + * So, start monitoring again.
>>> + */
>>> + monitor_thermal_zone(tz);
>>> +}
>>> +
>>> +static int thermal_zone_get_temp(struct thermal_zone_device *tz,
>>> + unsigned long *temp)
>>> +{
>>> + int ret = 0;
>>> +#ifdef CONFIG_THERMAL_EMULATION
>>> + int count;
>>> + unsigned long crit_temp = -1UL;
>>> + enum thermal_trip_type type;
>>> +#endif
>>> +
>>> + mutex_lock(&tz->lock);
>>> +
>>> + ret = tz->ops->get_temp(tz, temp);
>>> +#ifdef CONFIG_THERMAL_EMULATION
>>> + if (!tz->emul_temperature)
>>> + goto skip_emul;
>>> +
>>> + for (count = 0; count < tz->trips; count++) {
>>> + ret = tz->ops->get_trip_type(tz, count, &type);
>>> + if (!ret && type == THERMAL_TRIP_CRITICAL) {
>>> + ret = tz->ops->get_trip_temp(tz, count, &crit_temp);
>>> + break;
>>> + }
>>> + }
>>> +
>>> + if (ret)
>>> + goto skip_emul;
>>> +
>>> + if (*temp < crit_temp)
>>> + *temp = tz->emul_temperature;
>>> +skip_emul:
>>> +#endif
>>> + mutex_unlock(&tz->lock);
>>> + return ret;
>>> +}
>>> +
>>> +static void update_temperature(struct thermal_zone_device *tz)
>>> +{
>>> + long temp;
>>> + int ret;
>>> +
>>> + ret = thermal_zone_get_temp(tz, &temp);
>>> + if (ret) {
>>> + dev_warn(&tz->device, "failed to read out thermal zone %d\n",
>>> + tz->id);
>>> + return;
>>> + }
>>> +
>>> + mutex_lock(&tz->lock);
>>> + tz->last_temperature = tz->temperature;
>>> + tz->temperature = temp;
>>> + mutex_unlock(&tz->lock);
>>> +}
>>> +
>>> +void thermal_zone_device_update(struct thermal_zone_device *tz)
>>> +{
>>> + int count;
>>> +
>>> + update_temperature(tz);
>>> +
>>> + for (count = 0; count < tz->trips; count++)
>>> + handle_thermal_trip(tz, count);
>>> +}
>>> +EXPORT_SYMBOL(thermal_zone_device_update);
>>> +
>>> +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);
>>> + thermal_zone_device_update(tz);
>>> +}
>>> +
>>> +/* sys I/F for thermal zone */
>>> +
>>> +#define to_thermal_zone(_dev) \
>>> + container_of(_dev, struct thermal_zone_device, device)
>>> +
>>> +static ssize_t
>>> +type_show(struct device *dev, struct device_attribute *attr, char *buf)
>>> +{
>>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> +
>>> + return sprintf(buf, "%s\n", tz->type);
>>> +}
>>> +
>>> +static ssize_t
>>> +temp_show(struct device *dev, struct device_attribute *attr, char *buf)
>>> +{
>>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> + long temperature;
>>> + int ret;
>>> +
>>> + ret = thermal_zone_get_temp(tz, &temperature);
>>> +
>>> + if (ret)
>>> + return ret;
>>> +
>>> + return sprintf(buf, "%ld\n", temperature);
>>> +}
>>> +
>>> +static ssize_t
>>> +mode_show(struct device *dev, struct device_attribute *attr, char *buf)
>>> +{
>>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> + enum thermal_device_mode mode;
>>> + int result;
>>> +
>>> + if (!tz->ops->get_mode)
>>> + return -EPERM;
>>> +
>>> + result = tz->ops->get_mode(tz, &mode);
>>> + if (result)
>>> + return result;
>>> +
>>> + return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled"
>>> + : "disabled");
>>> +}
>>> +
>>> +static ssize_t
>>> +mode_store(struct device *dev, struct device_attribute *attr,
>>> + const char *buf, size_t count)
>>> +{
>>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> + int result;
>>> +
>>> + if (!tz->ops->set_mode)
>>> + return -EPERM;
>>> +
>>> + if (!strncmp(buf, "enabled", sizeof("enabled") - 1))
>>> + result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED);
>>> + else if (!strncmp(buf, "disabled", sizeof("disabled") - 1))
>>> + result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED);
>>> + else
>>> + result = -EINVAL;
>>> +
>>> + if (result)
>>> + return result;
>>> +
>>> + return count;
>>> +}
>>> +
>>> +static ssize_t
>>> +trip_point_type_show(struct device *dev, struct device_attribute *attr,
>>> + char *buf)
>>> +{
>>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> + enum thermal_trip_type type;
>>> + int trip, result;
>>> +
>>> + if (!tz->ops->get_trip_type)
>>> + return -EPERM;
>>> +
>>> + if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip))
>>> + return -EINVAL;
>>> +
>>> + result = tz->ops->get_trip_type(tz, trip, &type);
>>> + if (result)
>>> + return result;
>>> +
>>> + switch (type) {
>>> + case THERMAL_TRIP_CRITICAL:
>>> + return sprintf(buf, "critical\n");
>>> + case THERMAL_TRIP_HOT:
>>> + return sprintf(buf, "hot\n");
>>> + case THERMAL_TRIP_PASSIVE:
>>> + return sprintf(buf, "passive\n");
>>> + case THERMAL_TRIP_ACTIVE:
>>> + return sprintf(buf, "active\n");
>>> + default:
>>> + return sprintf(buf, "unknown\n");
>>> + }
>>> +}
>>> +
>>> +static ssize_t
>>> +trip_point_temp_store(struct device *dev, struct device_attribute *attr,
>>> + const char *buf, size_t count)
>>> +{
>>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> + int trip, ret;
>>> + unsigned long temperature;
>>> +
>>> + if (!tz->ops->set_trip_temp)
>>> + return -EPERM;
>>> +
>>> + if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip))
>>> + return -EINVAL;
>>> +
>>> + if (kstrtoul(buf, 10, &temperature))
>>> + return -EINVAL;
>>> +
>>> + ret = tz->ops->set_trip_temp(tz, trip, temperature);
>>> +
>>> + return ret ? ret : count;
>>> +}
>>> +
>>> +static ssize_t
>>> +trip_point_temp_show(struct device *dev, struct device_attribute *attr,
>>> + char *buf)
>>> +{
>>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> + int trip, ret;
>>> + long temperature;
>>> +
>>> + if (!tz->ops->get_trip_temp)
>>> + return -EPERM;
>>> +
>>> + if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip))
>>> + return -EINVAL;
>>> +
>>> + ret = tz->ops->get_trip_temp(tz, trip, &temperature);
>>> +
>>> + if (ret)
>>> + return ret;
>>> +
>>> + return sprintf(buf, "%ld\n", temperature);
>>> +}
>>> +
>>> +static ssize_t
>>> +trip_point_hyst_store(struct device *dev, struct device_attribute *attr,
>>> + const char *buf, size_t count)
>>> +{
>>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> + int trip, ret;
>>> + unsigned long temperature;
>>> +
>>> + if (!tz->ops->set_trip_hyst)
>>> + return -EPERM;
>>> +
>>> + if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip))
>>> + return -EINVAL;
>>> +
>>> + if (kstrtoul(buf, 10, &temperature))
>>> + return -EINVAL;
>>> +
>>> + /*
>>> + * We are not doing any check on the 'temperature' value
>>> + * here. The driver implementing 'set_trip_hyst' has to
>>> + * take care of this.
>>> + */
>>> + ret = tz->ops->set_trip_hyst(tz, trip, temperature);
>>> +
>>> + return ret ? ret : count;
>>> +}
>>> +
>>> +static ssize_t
>>> +trip_point_hyst_show(struct device *dev, struct device_attribute *attr,
>>> + char *buf)
>>> +{
>>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> + int trip, ret;
>>> + unsigned long temperature;
>>> +
>>> + if (!tz->ops->get_trip_hyst)
>>> + return -EPERM;
>>> +
>>> + if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip))
>>> + return -EINVAL;
>>> +
>>> + ret = tz->ops->get_trip_hyst(tz, trip, &temperature);
>>> +
>>> + return ret ? ret : sprintf(buf, "%ld\n", temperature);
>>> +}
>>> +
>>> +static ssize_t
>>> +passive_store(struct device *dev, struct device_attribute *attr,
>>> + const char *buf, size_t count)
>>> +{
>>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> + struct thermal_cooling_device *cdev = NULL;
>>> + int state;
>>> +
>>> + if (!sscanf(buf, "%d\n", &state))
>>> + return -EINVAL;
>>> +
>>> + /* sanity check: values below 1000 millicelcius don't make sense
>>> + * and can cause the system to go into a thermal heart attack
>>> + */
>>> + if (state && state < 1000)
>>> + return -EINVAL;
>>> +
>>> + if (state && !tz->forced_passive) {
>>> + mutex_lock(&thermal_list_lock);
>>> + list_for_each_entry(cdev, &thermal_cdev_list, node) {
>>> + if (!strncmp("Processor", cdev->type,
>>> + sizeof("Processor")))
>>> + thermal_zone_bind_cooling_device(tz,
>>> + THERMAL_TRIPS_NONE, cdev,
>>> + THERMAL_NO_LIMIT,
>>> + THERMAL_NO_LIMIT);
>>> + }
>>> + mutex_unlock(&thermal_list_lock);
>>> + if (!tz->passive_delay)
>>> + tz->passive_delay = 1000;
>>> + } else if (!state && tz->forced_passive) {
>>> + mutex_lock(&thermal_list_lock);
>>> + list_for_each_entry(cdev, &thermal_cdev_list, node) {
>>> + if (!strncmp("Processor", cdev->type,
>>> + sizeof("Processor")))
>>> + thermal_zone_unbind_cooling_device(tz,
>>> + THERMAL_TRIPS_NONE,
>>> + cdev);
>>> + }
>>> + mutex_unlock(&thermal_list_lock);
>>> + tz->passive_delay = 0;
>>> + }
>>> +
>>> + tz->forced_passive = state;
>>> +
>>> + thermal_zone_device_update(tz);
>>> +
>>> + return count;
>>> +}
>>> +
>>> +static ssize_t
>>> +passive_show(struct device *dev, struct device_attribute *attr,
>>> + char *buf)
>>> +{
>>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> +
>>> + return sprintf(buf, "%d\n", tz->forced_passive);
>>> +}
>>> +
>>> +static ssize_t
>>> +policy_store(struct device *dev, struct device_attribute *attr,
>>> + const char *buf, size_t count)
>>> +{
>>> + int ret = -EINVAL;
>>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> + struct thermal_governor *gov;
>>> +
>>> + mutex_lock(&thermal_governor_lock);
>>> +
>>> + gov = __find_governor(buf);
>>> + if (!gov)
>>> + goto exit;
>>> +
>>> + tz->governor = gov;
>>> + ret = count;
>>> +
>>> +exit:
>>> + mutex_unlock(&thermal_governor_lock);
>>> + return ret;
>>> +}
>>> +
>>> +static ssize_t
>>> +policy_show(struct device *dev, struct device_attribute *devattr, char *buf)
>>> +{
>>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> +
>>> + return sprintf(buf, "%s\n", tz->governor->name);
>>> +}
>>> +
>>> +#ifdef CONFIG_THERMAL_EMULATION
>>> +static ssize_t
>>> +emul_temp_store(struct device *dev, struct device_attribute *attr,
>>> + const char *buf, size_t count)
>>> +{
>>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> + int ret = 0;
>>> + unsigned long temperature;
>>> +
>>> + if (kstrtoul(buf, 10, &temperature))
>>> + return -EINVAL;
>>> +
>>> + if (!tz->ops->set_emul_temp) {
>>> + mutex_lock(&tz->lock);
>>> + tz->emul_temperature = temperature;
>>> + mutex_unlock(&tz->lock);
>>> + } else {
>>> + ret = tz->ops->set_emul_temp(tz, temperature);
>>> + }
>>> +
>>> + return ret ? ret : count;
>>> +}
>>> +static DEVICE_ATTR(emul_temp, S_IWUSR, NULL, emul_temp_store);
>>> +#endif/*CONFIG_THERMAL_EMULATION*/
>>> +
>>> +static DEVICE_ATTR(type, 0444, type_show, NULL);
>>> +static DEVICE_ATTR(temp, 0444, temp_show, NULL);
>>> +static DEVICE_ATTR(mode, 0644, mode_show, mode_store);
>>> +static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store);
>>> +static DEVICE_ATTR(policy, S_IRUGO | S_IWUSR, policy_show, policy_store);
>>> +
>>> +/* sys I/F for cooling device */
>>> +#define to_cooling_device(_dev) \
>>> + container_of(_dev, struct thermal_cooling_device, device)
>>> +
>>> +static ssize_t
>>> +thermal_cooling_device_type_show(struct device *dev,
>>> + struct device_attribute *attr, char *buf)
>>> +{
>>> + struct thermal_cooling_device *cdev = to_cooling_device(dev);
>>> +
>>> + return sprintf(buf, "%s\n", cdev->type);
>>> +}
>>> +
>>> +static ssize_t
>>> +thermal_cooling_device_max_state_show(struct device *dev,
>>> + struct device_attribute *attr, char *buf)
>>> +{
>>> + struct thermal_cooling_device *cdev = to_cooling_device(dev);
>>> + unsigned long state;
>>> + int ret;
>>> +
>>> + ret = cdev->ops->get_max_state(cdev, &state);
>>> + if (ret)
>>> + return ret;
>>> + return sprintf(buf, "%ld\n", state);
>>> +}
>>> +
>>> +static ssize_t
>>> +thermal_cooling_device_cur_state_show(struct device *dev,
>>> + struct device_attribute *attr, char *buf)
>>> +{
>>> + struct thermal_cooling_device *cdev = to_cooling_device(dev);
>>> + unsigned long state;
>>> + int ret;
>>> +
>>> + ret = cdev->ops->get_cur_state(cdev, &state);
>>> + if (ret)
>>> + return ret;
>>> + return sprintf(buf, "%ld\n", state);
>>> +}
>>> +
>>> +static ssize_t
>>> +thermal_cooling_device_cur_state_store(struct device *dev,
>>> + struct device_attribute *attr,
>>> + const char *buf, size_t count)
>>> +{
>>> + struct thermal_cooling_device *cdev = to_cooling_device(dev);
>>> + unsigned long state;
>>> + int result;
>>> +
>>> + if (!sscanf(buf, "%ld\n", &state))
>>> + return -EINVAL;
>>> +
>>> + if ((long)state < 0)
>>> + return -EINVAL;
>>> +
>>> + result = cdev->ops->set_cur_state(cdev, state);
>>> + if (result)
>>> + return result;
>>> + return count;
>>> +}
>>> +
>>> +static struct device_attribute dev_attr_cdev_type =
>>> +__ATTR(type, 0444, thermal_cooling_device_type_show, NULL);
>>> +static DEVICE_ATTR(max_state, 0444,
>>> + thermal_cooling_device_max_state_show, NULL);
>>> +static DEVICE_ATTR(cur_state, 0644,
>>> + thermal_cooling_device_cur_state_show,
>>> + thermal_cooling_device_cur_state_store);
>>> +
>>> +static ssize_t
>>> +thermal_cooling_device_trip_point_show(struct device *dev,
>>> + struct device_attribute *attr, char *buf)
>>> +{
>>> + struct thermal_instance *instance;
>>> +
>>> + instance =
>>> + container_of(attr, struct thermal_instance, attr);
>>> +
>>> + if (instance->trip == THERMAL_TRIPS_NONE)
>>> + return sprintf(buf, "-1\n");
>>> + else
>>> + return sprintf(buf, "%d\n", instance->trip);
>>> +}
>>> +
>>> +/* Device management */
>>> +
>>> +#if defined(CONFIG_THERMAL_HWMON)
>>> +
>>> +/* hwmon sys I/F */
>>> +#include <linux/hwmon.h>
>>> +
>>> +/* thermal zone devices with the same type share one hwmon device */
>>> +struct thermal_hwmon_device {
>>> + char type[THERMAL_NAME_LENGTH];
>>> + struct device *device;
>>> + int count;
>>> + struct list_head tz_list;
>>> + struct list_head node;
>>> +};
>>> +
>>> +struct thermal_hwmon_attr {
>>> + struct device_attribute attr;
>>> + char name[16];
>>> +};
>>> +
>>> +/* one temperature input for each thermal zone */
>>> +struct thermal_hwmon_temp {
>>> + struct list_head hwmon_node;
>>> + struct thermal_zone_device *tz;
>>> + struct thermal_hwmon_attr temp_input; /* hwmon sys attr */
>>> + struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */
>>> +};
>>> +
>>> +static LIST_HEAD(thermal_hwmon_list);
>>> +
>>> +static ssize_t
>>> +name_show(struct device *dev, struct device_attribute *attr, char *buf)
>>> +{
>>> + struct thermal_hwmon_device *hwmon = dev_get_drvdata(dev);
>>> + return sprintf(buf, "%s\n", hwmon->type);
>>> +}
>>> +static DEVICE_ATTR(name, 0444, name_show, NULL);
>>> +
>>> +static ssize_t
>>> +temp_input_show(struct device *dev, struct device_attribute *attr, char *buf)
>>> +{
>>> + long temperature;
>>> + int ret;
>>> + struct thermal_hwmon_attr *hwmon_attr
>>> + = container_of(attr, struct thermal_hwmon_attr, attr);
>>> + struct thermal_hwmon_temp *temp
>>> + = container_of(hwmon_attr, struct thermal_hwmon_temp,
>>> + temp_input);
>>> + struct thermal_zone_device *tz = temp->tz;
>>> +
>>> + ret = thermal_zone_get_temp(tz, &temperature);
>>> +
>>> + if (ret)
>>> + return ret;
>>> +
>>> + return sprintf(buf, "%ld\n", temperature);
>>> +}
>>> +
>>> +static ssize_t
>>> +temp_crit_show(struct device *dev, struct device_attribute *attr,
>>> + char *buf)
>>> +{
>>> + struct thermal_hwmon_attr *hwmon_attr
>>> + = container_of(attr, struct thermal_hwmon_attr, attr);
>>> + struct thermal_hwmon_temp *temp
>>> + = container_of(hwmon_attr, struct thermal_hwmon_temp,
>>> + temp_crit);
>>> + struct thermal_zone_device *tz = temp->tz;
>>> + long temperature;
>>> + int ret;
>>> +
>>> + ret = tz->ops->get_trip_temp(tz, 0, &temperature);
>>> + if (ret)
>>> + return ret;
>>> +
>>> + return sprintf(buf, "%ld\n", temperature);
>>> +}
>>> +
>>> +
>>> +static struct thermal_hwmon_device *
>>> +thermal_hwmon_lookup_by_type(const struct thermal_zone_device *tz)
>>> +{
>>> + struct thermal_hwmon_device *hwmon;
>>> +
>>> + mutex_lock(&thermal_list_lock);
>>> + list_for_each_entry(hwmon, &thermal_hwmon_list, node)
>>> + if (!strcmp(hwmon->type, tz->type)) {
>>> + mutex_unlock(&thermal_list_lock);
>>> + return hwmon;
>>> + }
>>> + mutex_unlock(&thermal_list_lock);
>>> +
>>> + return NULL;
>>> +}
>>> +
>>> +/* Find the temperature input matching a given thermal zone */
>>> +static struct thermal_hwmon_temp *
>>> +thermal_hwmon_lookup_temp(const struct thermal_hwmon_device *hwmon,
>>> + const struct thermal_zone_device *tz)
>>> +{
>>> + struct thermal_hwmon_temp *temp;
>>> +
>>> + mutex_lock(&thermal_list_lock);
>>> + list_for_each_entry(temp, &hwmon->tz_list, hwmon_node)
>>> + if (temp->tz == tz) {
>>> + mutex_unlock(&thermal_list_lock);
>>> + return temp;
>>> + }
>>> + mutex_unlock(&thermal_list_lock);
>>> +
>>> + return NULL;
>>> +}
>>> +
>>> +static int
>>> +thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
>>> +{
>>> + struct thermal_hwmon_device *hwmon;
>>> + struct thermal_hwmon_temp *temp;
>>> + int new_hwmon_device = 1;
>>> + int result;
>>> +
>>> + hwmon = thermal_hwmon_lookup_by_type(tz);
>>> + if (hwmon) {
>>> + new_hwmon_device = 0;
>>> + goto register_sys_interface;
>>> + }
>>> +
>>> + hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL);
>>> + if (!hwmon)
>>> + return -ENOMEM;
>>> +
>>> + INIT_LIST_HEAD(&hwmon->tz_list);
>>> + strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH);
>>> + hwmon->device = hwmon_device_register(NULL);
>>> + if (IS_ERR(hwmon->device)) {
>>> + result = PTR_ERR(hwmon->device);
>>> + goto free_mem;
>>> + }
>>> + dev_set_drvdata(hwmon->device, hwmon);
>>> + result = device_create_file(hwmon->device, &dev_attr_name);
>>> + if (result)
>>> + goto free_mem;
>>> +
>>> + register_sys_interface:
>>> + temp = kzalloc(sizeof(struct thermal_hwmon_temp), GFP_KERNEL);
>>> + if (!temp) {
>>> + result = -ENOMEM;
>>> + goto unregister_name;
>>> + }
>>> +
>>> + temp->tz = tz;
>>> + hwmon->count++;
>>> +
>>> + snprintf(temp->temp_input.name, sizeof(temp->temp_input.name),
>>> + "temp%d_input", hwmon->count);
>>> + temp->temp_input.attr.attr.name = temp->temp_input.name;
>>> + temp->temp_input.attr.attr.mode = 0444;
>>> + temp->temp_input.attr.show = temp_input_show;
>>> + sysfs_attr_init(&temp->temp_input.attr.attr);
>>> + result = device_create_file(hwmon->device, &temp->temp_input.attr);
>>> + if (result)
>>> + goto free_temp_mem;
>>> +
>>> + if (tz->ops->get_crit_temp) {
>>> + unsigned long temperature;
>>> + if (!tz->ops->get_crit_temp(tz, &temperature)) {
>>> + snprintf(temp->temp_crit.name,
>>> + sizeof(temp->temp_crit.name),
>>> + "temp%d_crit", hwmon->count);
>>> + temp->temp_crit.attr.attr.name = temp->temp_crit.name;
>>> + temp->temp_crit.attr.attr.mode = 0444;
>>> + temp->temp_crit.attr.show = temp_crit_show;
>>> + sysfs_attr_init(&temp->temp_crit.attr.attr);
>>> + result = device_create_file(hwmon->device,
>>> + &temp->temp_crit.attr);
>>> + if (result)
>>> + goto unregister_input;
>>> + }
>>> + }
>>> +
>>> + mutex_lock(&thermal_list_lock);
>>> + if (new_hwmon_device)
>>> + list_add_tail(&hwmon->node, &thermal_hwmon_list);
>>> + list_add_tail(&temp->hwmon_node, &hwmon->tz_list);
>>> + mutex_unlock(&thermal_list_lock);
>>> +
>>> + return 0;
>>> +
>>> + unregister_input:
>>> + device_remove_file(hwmon->device, &temp->temp_input.attr);
>>> + free_temp_mem:
>>> + kfree(temp);
>>> + unregister_name:
>>> + if (new_hwmon_device) {
>>> + device_remove_file(hwmon->device, &dev_attr_name);
>>> + hwmon_device_unregister(hwmon->device);
>>> + }
>>> + free_mem:
>>> + if (new_hwmon_device)
>>> + kfree(hwmon);
>>> +
>>> + return result;
>>> +}
>>> +
>>> +static void
>>> +thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz)
>>> +{
>>> + struct thermal_hwmon_device *hwmon;
>>> + struct thermal_hwmon_temp *temp;
>>> +
>>> + hwmon = thermal_hwmon_lookup_by_type(tz);
>>> + if (unlikely(!hwmon)) {
>>> + /* Should never happen... */
>>> + dev_dbg(&tz->device, "hwmon device lookup failed!\n");
>>> + return;
>>> + }
>>> +
>>> + temp = thermal_hwmon_lookup_temp(hwmon, tz);
>>> + if (unlikely(!temp)) {
>>> + /* Should never happen... */
>>> + dev_dbg(&tz->device, "temperature input lookup failed!\n");
>>> + return;
>>> + }
>>> +
>>> + device_remove_file(hwmon->device, &temp->temp_input.attr);
>>> + if (tz->ops->get_crit_temp)
>>> + device_remove_file(hwmon->device, &temp->temp_crit.attr);
>>> +
>>> + mutex_lock(&thermal_list_lock);
>>> + list_del(&temp->hwmon_node);
>>> + kfree(temp);
>>> + if (!list_empty(&hwmon->tz_list)) {
>>> + mutex_unlock(&thermal_list_lock);
>>> + return;
>>> + }
>>> + list_del(&hwmon->node);
>>> + mutex_unlock(&thermal_list_lock);
>>> +
>>> + device_remove_file(hwmon->device, &dev_attr_name);
>>> + hwmon_device_unregister(hwmon->device);
>>> + kfree(hwmon);
>>> +}
>>> +#else
>>> +static int
>>> +thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
>>> +{
>>> + return 0;
>>> +}
>>> +
>>> +static void
>>> +thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz)
>>> +{
>>> +}
>>> +#endif
>>> +
>>> +/**
>>> + * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone
>>> + * @tz: thermal zone device
>>> + * @trip: indicates which trip point the cooling devices is
>>> + * associated with in this thermal zone.
>>> + * @cdev: thermal cooling device
>>> + *
>>> + * This function is usually called in the thermal zone device .bind callback.
>>> + */
>>> +int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
>>> + int trip,
>>> + struct thermal_cooling_device *cdev,
>>> + unsigned long upper, unsigned long lower)
>>> +{
>>> + struct thermal_instance *dev;
>>> + struct thermal_instance *pos;
>>> + struct thermal_zone_device *pos1;
>>> + struct thermal_cooling_device *pos2;
>>> + unsigned long max_state;
>>> + int result;
>>> +
>>> + if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE))
>>> + return -EINVAL;
>>> +
>>> + 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)
>>> + return -EINVAL;
>>> +
>>> + cdev->ops->get_max_state(cdev, &max_state);
>>> +
>>> + /* 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;
>>> +
>>> + dev =
>>> + kzalloc(sizeof(struct thermal_instance), GFP_KERNEL);
>>> + if (!dev)
>>> + return -ENOMEM;
>>> + dev->tz = tz;
>>> + dev->cdev = cdev;
>>> + dev->trip = trip;
>>> + dev->upper = upper;
>>> + dev->lower = lower;
>>> + dev->target = THERMAL_NO_TARGET;
>>> +
>>> + result = get_idr(&tz->idr, &tz->lock, &dev->id);
>>> + if (result)
>>> + goto free_mem;
>>> +
>>> + sprintf(dev->name, "cdev%d", dev->id);
>>> + result =
>>> + sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name);
>>> + if (result)
>>> + goto release_idr;
>>> +
>>> + sprintf(dev->attr_name, "cdev%d_trip_point", dev->id);
>>> + sysfs_attr_init(&dev->attr.attr);
>>> + dev->attr.attr.name = dev->attr_name;
>>> + dev->attr.attr.mode = 0444;
>>> + dev->attr.show = thermal_cooling_device_trip_point_show;
>>> + result = device_create_file(&tz->device, &dev->attr);
>>> + if (result)
>>> + goto remove_symbol_link;
>>> +
>>> + mutex_lock(&tz->lock);
>>> + mutex_lock(&cdev->lock);
>>> + list_for_each_entry(pos, &tz->thermal_instances, tz_node)
>>> + if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
>>> + result = -EEXIST;
>>> + break;
>>> + }
>>> + if (!result) {
>>> + list_add_tail(&dev->tz_node, &tz->thermal_instances);
>>> + list_add_tail(&dev->cdev_node, &cdev->thermal_instances);
>>> + }
>>> + mutex_unlock(&cdev->lock);
>>> + mutex_unlock(&tz->lock);
>>> +
>>> + if (!result)
>>> + return 0;
>>> +
>>> + device_remove_file(&tz->device, &dev->attr);
>>> +remove_symbol_link:
>>> + sysfs_remove_link(&tz->device.kobj, dev->name);
>>> +release_idr:
>>> + release_idr(&tz->idr, &tz->lock, dev->id);
>>> +free_mem:
>>> + kfree(dev);
>>> + return result;
>>> +}
>>> +EXPORT_SYMBOL(thermal_zone_bind_cooling_device);
>>> +
>>> +/**
>>> + * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone
>>> + * @tz: thermal zone device
>>> + * @trip: indicates which trip point the cooling devices is
>>> + * associated with in this thermal zone.
>>> + * @cdev: thermal cooling device
>>> + *
>>> + * This function is usually called in the thermal zone device .unbind callback.
>>> + */
>>> +int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz,
>>> + int trip,
>>> + struct thermal_cooling_device *cdev)
>>> +{
>>> + struct thermal_instance *pos, *next;
>>> +
>>> + mutex_lock(&tz->lock);
>>> + mutex_lock(&cdev->lock);
>>> + list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) {
>>> + if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
>>> + list_del(&pos->tz_node);
>>> + list_del(&pos->cdev_node);
>>> + mutex_unlock(&cdev->lock);
>>> + mutex_unlock(&tz->lock);
>>> + goto unbind;
>>> + }
>>> + }
>>> + mutex_unlock(&cdev->lock);
>>> + mutex_unlock(&tz->lock);
>>> +
>>> + return -ENODEV;
>>> +
>>> +unbind:
>>> + device_remove_file(&tz->device, &pos->attr);
>>> + sysfs_remove_link(&tz->device.kobj, pos->name);
>>> + release_idr(&tz->idr, &tz->lock, pos->id);
>>> + kfree(pos);
>>> + return 0;
>>> +}
>>> +EXPORT_SYMBOL(thermal_zone_unbind_cooling_device);
>>> +
>>> +static void thermal_release(struct device *dev)
>>> +{
>>> + struct thermal_zone_device *tz;
>>> + struct thermal_cooling_device *cdev;
>>> +
>>> + if (!strncmp(dev_name(dev), "thermal_zone",
>>> + sizeof("thermal_zone") - 1)) {
>>> + tz = to_thermal_zone(dev);
>>> + kfree(tz);
>>> + } else {
>>> + cdev = to_cooling_device(dev);
>>> + kfree(cdev);
>>> + }
>>> +}
>>> +
>>> +static struct class thermal_class = {
>>> + .name = "thermal",
>>> + .dev_release = thermal_release,
>>> +};
>>> +
>>> +/**
>>> + * 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.
>>> + */
>>> +struct thermal_cooling_device *
>>> +thermal_cooling_device_register(char *type, void *devdata,
>>> + const struct thermal_cooling_device_ops *ops)
>>> +{
>>> + struct thermal_cooling_device *cdev;
>>> + int result;
>>> +
>>> + if (type && strlen(type) >= THERMAL_NAME_LENGTH)
>>> + return ERR_PTR(-EINVAL);
>>> +
>>> + if (!ops || !ops->get_max_state || !ops->get_cur_state ||
>>> + !ops->set_cur_state)
>>> + return ERR_PTR(-EINVAL);
>>> +
>>> + cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL);
>>> + if (!cdev)
>>> + return ERR_PTR(-ENOMEM);
>>> +
>>> + result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id);
>>> + if (result) {
>>> + kfree(cdev);
>>> + return ERR_PTR(result);
>>> + }
>>> +
>>> + strcpy(cdev->type, type ? : "");
>>> + mutex_init(&cdev->lock);
>>> + INIT_LIST_HEAD(&cdev->thermal_instances);
>>> + cdev->ops = ops;
>>> + cdev->updated = true;
>>> + cdev->device.class = &thermal_class;
>>> + cdev->devdata = devdata;
>>> + dev_set_name(&cdev->device, "cooling_device%d", cdev->id);
>>> + result = device_register(&cdev->device);
>>> + if (result) {
>>> + release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
>>> + kfree(cdev);
>>> + return ERR_PTR(result);
>>> + }
>>> +
>>> + /* sys I/F */
>>> + if (type) {
>>> + result = device_create_file(&cdev->device, &dev_attr_cdev_type);
>>> + if (result)
>>> + goto unregister;
>>> + }
>>> +
>>> + result = device_create_file(&cdev->device, &dev_attr_max_state);
>>> + if (result)
>>> + goto unregister;
>>> +
>>> + result = device_create_file(&cdev->device, &dev_attr_cur_state);
>>> + if (result)
>>> + goto unregister;
>>> +
>>> + /* Add 'this' new cdev to the global cdev list */
>>> + mutex_lock(&thermal_list_lock);
>>> + list_add(&cdev->node, &thermal_cdev_list);
>>> + mutex_unlock(&thermal_list_lock);
>>> +
>>> + /* Update binding information for 'this' new cdev */
>>> + bind_cdev(cdev);
>>> +
>>> + return cdev;
>>> +
>>> +unregister:
>>> + release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
>>> + device_unregister(&cdev->device);
>>> + return ERR_PTR(result);
>>> +}
>>> +EXPORT_SYMBOL(thermal_cooling_device_register);
>>> +
>>> +/**
>>> + * thermal_cooling_device_unregister - removes the registered thermal cooling device
>>> + * @cdev: the thermal cooling device to remove.
>>> + *
>>> + * thermal_cooling_device_unregister() must be called when the device is no
>>> + * longer needed.
>>> + */
>>> +void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev)
>>> +{
>>> + int i;
>>> + const struct thermal_zone_params *tzp;
>>> + 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)
>>> + if (pos == cdev)
>>> + break;
>>> + if (pos != cdev) {
>>> + /* thermal cooling device not found */
>>> + mutex_unlock(&thermal_list_lock);
>>> + return;
>>> + }
>>> + list_del(&cdev->node);
>>> +
>>> + /* Unbind all thermal zones associated with 'this' cdev */
>>> + list_for_each_entry(tz, &thermal_tz_list, node) {
>>> + if (tz->ops->unbind) {
>>> + tz->ops->unbind(tz, cdev);
>>> + continue;
>>> + }
>>> +
>>> + if (!tz->tzp || !tz->tzp->tbp)
>>> + continue;
>>> +
>>> + 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;
>>> + }
>>> + }
>>> + }
>>> +
>>> + mutex_unlock(&thermal_list_lock);
>>> +
>>> + if (cdev->type[0])
>>> + device_remove_file(&cdev->device, &dev_attr_cdev_type);
>>> + device_remove_file(&cdev->device, &dev_attr_max_state);
>>> + device_remove_file(&cdev->device, &dev_attr_cur_state);
>>> +
>>> + release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
>>> + device_unregister(&cdev->device);
>>> + return;
>>> +}
>>> +EXPORT_SYMBOL(thermal_cooling_device_unregister);
>>> +
>>> +void thermal_cdev_update(struct thermal_cooling_device *cdev)
>>> +{
>>> + struct thermal_instance *instance;
>>> + unsigned long target = 0;
>>> +
>>> + /* cooling device is updated*/
>>> + if (cdev->updated)
>>> + return;
>>> +
>>> + mutex_lock(&cdev->lock);
>>> + /* Make sure cdev enters the deepest cooling state */
>>> + list_for_each_entry(instance, &cdev->thermal_instances, cdev_node) {
>>> + if (instance->target == THERMAL_NO_TARGET)
>>> + continue;
>>> + if (instance->target > target)
>>> + target = instance->target;
>>> + }
>>> + mutex_unlock(&cdev->lock);
>>> + cdev->ops->set_cur_state(cdev, target);
>>> + cdev->updated = true;
>>> +}
>>> +EXPORT_SYMBOL(thermal_cdev_update);
>>> +
>>> +/**
>>> + * notify_thermal_framework - Sensor drivers use this API to notify framework
>>> + * @tz: thermal zone device
>>> + * @trip: indicates which trip point has been crossed
>>> + *
>>> + * This function handles the trip events from sensor drivers. It starts
>>> + * throttling the cooling devices according to the policy configured.
>>> + * For CRITICAL and HOT trip points, this notifies the respective drivers,
>>> + * and does actual throttling for other trip points i.e ACTIVE and PASSIVE.
>>> + * The throttling policy is based on the configured platform data; if no
>>> + * platform data is provided, this uses the step_wise throttling policy.
>>> + */
>>> +void notify_thermal_framework(struct thermal_zone_device *tz, int trip)
>>> +{
>>> + handle_thermal_trip(tz, trip);
>>> +}
>>> +EXPORT_SYMBOL(notify_thermal_framework);
>>> +
>>> +/**
>>> + * create_trip_attrs - create attributes for trip points
>>> + * @tz: the thermal zone device
>>> + * @mask: Writeable trip point bitmap.
>>> + */
>>> +static int create_trip_attrs(struct thermal_zone_device *tz, int mask)
>>> +{
>>> + int indx;
>>> + int size = sizeof(struct thermal_attr) * tz->trips;
>>> +
>>> + tz->trip_type_attrs = kzalloc(size, GFP_KERNEL);
>>> + if (!tz->trip_type_attrs)
>>> + return -ENOMEM;
>>> +
>>> + tz->trip_temp_attrs = kzalloc(size, GFP_KERNEL);
>>> + if (!tz->trip_temp_attrs) {
>>> + kfree(tz->trip_type_attrs);
>>> + return -ENOMEM;
>>> + }
>>> +
>>> + if (tz->ops->get_trip_hyst) {
>>> + tz->trip_hyst_attrs = kzalloc(size, GFP_KERNEL);
>>> + if (!tz->trip_hyst_attrs) {
>>> + kfree(tz->trip_type_attrs);
>>> + kfree(tz->trip_temp_attrs);
>>> + return -ENOMEM;
>>> + }
>>> + }
>>> +
>>> +
>>> + for (indx = 0; indx < tz->trips; indx++) {
>>> + /* create trip type attribute */
>>> + snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH,
>>> + "trip_point_%d_type", indx);
>>> +
>>> + sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr);
>>> + tz->trip_type_attrs[indx].attr.attr.name =
>>> + tz->trip_type_attrs[indx].name;
>>> + tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO;
>>> + tz->trip_type_attrs[indx].attr.show = trip_point_type_show;
>>> +
>>> + device_create_file(&tz->device,
>>> + &tz->trip_type_attrs[indx].attr);
>>> +
>>> + /* create trip temp attribute */
>>> + snprintf(tz->trip_temp_attrs[indx].name, THERMAL_NAME_LENGTH,
>>> + "trip_point_%d_temp", indx);
>>> +
>>> + sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr);
>>> + tz->trip_temp_attrs[indx].attr.attr.name =
>>> + tz->trip_temp_attrs[indx].name;
>>> + tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO;
>>> + tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show;
>>> + if (mask & (1 << indx)) {
>>> + tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR;
>>> + tz->trip_temp_attrs[indx].attr.store =
>>> + trip_point_temp_store;
>>> + }
>>> +
>>> + device_create_file(&tz->device,
>>> + &tz->trip_temp_attrs[indx].attr);
>>> +
>>> + /* create Optional trip hyst attribute */
>>> + if (!tz->ops->get_trip_hyst)
>>> + continue;
>>> + snprintf(tz->trip_hyst_attrs[indx].name, THERMAL_NAME_LENGTH,
>>> + "trip_point_%d_hyst", indx);
>>> +
>>> + sysfs_attr_init(&tz->trip_hyst_attrs[indx].attr.attr);
>>> + tz->trip_hyst_attrs[indx].attr.attr.name =
>>> + tz->trip_hyst_attrs[indx].name;
>>> + tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO;
>>> + tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show;
>>> + if (tz->ops->set_trip_hyst) {
>>> + tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR;
>>> + tz->trip_hyst_attrs[indx].attr.store =
>>> + trip_point_hyst_store;
>>> + }
>>> +
>>> + device_create_file(&tz->device,
>>> + &tz->trip_hyst_attrs[indx].attr);
>>> + }
>>> + return 0;
>>> +}
>>> +
>>> +static void remove_trip_attrs(struct thermal_zone_device *tz)
>>> +{
>>> + int indx;
>>> +
>>> + for (indx = 0; indx < tz->trips; indx++) {
>>> + device_remove_file(&tz->device,
>>> + &tz->trip_type_attrs[indx].attr);
>>> + device_remove_file(&tz->device,
>>> + &tz->trip_temp_attrs[indx].attr);
>>> + if (tz->ops->get_trip_hyst)
>>> + device_remove_file(&tz->device,
>>> + &tz->trip_hyst_attrs[indx].attr);
>>> + }
>>> + kfree(tz->trip_type_attrs);
>>> + kfree(tz->trip_temp_attrs);
>>> + kfree(tz->trip_hyst_attrs);
>>> +}
>>> +
>>> +/**
>>> + * thermal_zone_device_register - register a new thermal zone device
>>> + * @type: the thermal zone device type
>>> + * @trips: the number of trip points the thermal zone support
>>> + * @mask: a bit string indicating the writeablility of trip points
>>> + * @devdata: private device data
>>> + * @ops: standard thermal zone device callbacks
>>> + * @tzp: thermal zone platform parameters
>>> + * @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)
>>> + *
>>> + * thermal_zone_device_unregister() must be called when the device is no
>>> + * longer needed. The passive cooling depends on the .get_trend() return value.
>>> + */
>>> +struct thermal_zone_device *thermal_zone_device_register(const char *type,
>>> + int trips, int mask, void *devdata,
>>> + const struct thermal_zone_device_ops *ops,
>>> + const struct thermal_zone_params *tzp,
>>> + int passive_delay, int polling_delay)
>>> +{
>>> + struct thermal_zone_device *tz;
>>> + enum thermal_trip_type trip_type;
>>> + int result;
>>> + int count;
>>> + int passive = 0;
>>> +
>>> + if (type && strlen(type) >= THERMAL_NAME_LENGTH)
>>> + return ERR_PTR(-EINVAL);
>>> +
>>> + if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips)
>>> + return ERR_PTR(-EINVAL);
>>> +
>>> + if (!ops || !ops->get_temp)
>>> + return ERR_PTR(-EINVAL);
>>> +
>>> + if (trips > 0 && !ops->get_trip_type)
>>> + return ERR_PTR(-EINVAL);
>>> +
>>> + tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL);
>>> + if (!tz)
>>> + return ERR_PTR(-ENOMEM);
>>> +
>>> + INIT_LIST_HEAD(&tz->thermal_instances);
>>> + idr_init(&tz->idr);
>>> + mutex_init(&tz->lock);
>>> + result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id);
>>> + if (result) {
>>> + kfree(tz);
>>> + return ERR_PTR(result);
>>> + }
>>> +
>>> + strcpy(tz->type, type ? : "");
>>> + tz->ops = ops;
>>> + tz->tzp = tzp;
>>> + tz->device.class = &thermal_class;
>>> + tz->devdata = devdata;
>>> + tz->trips = trips;
>>> + tz->passive_delay = passive_delay;
>>> + tz->polling_delay = polling_delay;
>>> +
>>> + dev_set_name(&tz->device, "thermal_zone%d", tz->id);
>>> + result = device_register(&tz->device);
>>> + if (result) {
>>> + release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
>>> + kfree(tz);
>>> + return ERR_PTR(result);
>>> + }
>>> +
>>> + /* sys I/F */
>>> + if (type) {
>>> + result = device_create_file(&tz->device, &dev_attr_type);
>>> + if (result)
>>> + goto unregister;
>>> + }
>>> +
>>> + result = device_create_file(&tz->device, &dev_attr_temp);
>>> + if (result)
>>> + goto unregister;
>>> +
>>> + if (ops->get_mode) {
>>> + result = device_create_file(&tz->device, &dev_attr_mode);
>>> + if (result)
>>> + goto unregister;
>>> + }
>>> +
>>> + result = create_trip_attrs(tz, mask);
>>> + if (result)
>>> + goto unregister;
>>> +
>>> + for (count = 0; count < trips; count++) {
>>> + tz->ops->get_trip_type(tz, count, &trip_type);
>>> + if (trip_type == THERMAL_TRIP_PASSIVE)
>>> + passive = 1;
>>> + }
>>> +
>>> + if (!passive) {
>>> + result = device_create_file(&tz->device, &dev_attr_passive);
>>> + if (result)
>>> + goto unregister;
>>> + }
>>> +
>>> +#ifdef CONFIG_THERMAL_EMULATION
>>> + result = device_create_file(&tz->device, &dev_attr_emul_temp);
>>> + if (result)
>>> + goto unregister;
>>> +#endif
>>> + /* Create policy attribute */
>>> + result = device_create_file(&tz->device, &dev_attr_policy);
>>> + if (result)
>>> + goto unregister;
>>> +
>>> + /* Update 'this' zone's governor information */
>>> + mutex_lock(&thermal_governor_lock);
>>> +
>>> + if (tz->tzp)
>>> + tz->governor = __find_governor(tz->tzp->governor_name);
>>> + else
>>> + tz->governor = __find_governor(DEFAULT_THERMAL_GOVERNOR);
>>> +
>>> + mutex_unlock(&thermal_governor_lock);
>>> +
>>> + result = thermal_add_hwmon_sysfs(tz);
>>> + if (result)
>>> + goto unregister;
>>> +
>>> + mutex_lock(&thermal_list_lock);
>>> + list_add_tail(&tz->node, &thermal_tz_list);
>>> + mutex_unlock(&thermal_list_lock);
>>> +
>>> + /* Bind cooling devices for this zone */
>>> + bind_tz(tz);
>>> +
>>> + INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check);
>>> +
>>> + thermal_zone_device_update(tz);
>>> +
>>> + if (!result)
>>> + return tz;
>>> +
>>> +unregister:
>>> + release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
>>> + device_unregister(&tz->device);
>>> + return ERR_PTR(result);
>>> +}
>>> +EXPORT_SYMBOL(thermal_zone_device_register);
>>> +
>>> +/**
>>> + * thermal_device_unregister - removes the registered thermal zone device
>>> + * @tz: the thermal zone device to remove
>>> + */
>>> +void thermal_zone_device_unregister(struct thermal_zone_device *tz)
>>> +{
>>> + int i;
>>> + const struct thermal_zone_params *tzp;
>>> + struct thermal_cooling_device *cdev;
>>> + struct thermal_zone_device *pos = NULL;
>>> +
>>> + if (!tz)
>>> + return;
>>> +
>>> + tzp = tz->tzp;
>>> +
>>> + mutex_lock(&thermal_list_lock);
>>> + list_for_each_entry(pos, &thermal_tz_list, node)
>>> + if (pos == tz)
>>> + break;
>>> + if (pos != tz) {
>>> + /* thermal zone device not found */
>>> + mutex_unlock(&thermal_list_lock);
>>> + return;
>>> + }
>>> + list_del(&tz->node);
>>> +
>>> + /* 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;
>>> + }
>>> + }
>>> + }
>>> +
>>> + mutex_unlock(&thermal_list_lock);
>>> +
>>> + thermal_zone_device_set_polling(tz, 0);
>>> +
>>> + if (tz->type[0])
>>> + device_remove_file(&tz->device, &dev_attr_type);
>>> + device_remove_file(&tz->device, &dev_attr_temp);
>>> + if (tz->ops->get_mode)
>>> + device_remove_file(&tz->device, &dev_attr_mode);
>>> + device_remove_file(&tz->device, &dev_attr_policy);
>>> + remove_trip_attrs(tz);
>>> + tz->governor = NULL;
>>> +
>>> + thermal_remove_hwmon_sysfs(tz);
>>> + release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
>>> + idr_destroy(&tz->idr);
>>> + mutex_destroy(&tz->lock);
>>> + device_unregister(&tz->device);
>>> + return;
>>> +}
>>> +EXPORT_SYMBOL(thermal_zone_device_unregister);
>>> +
>>> +#ifdef CONFIG_NET
>>> +static struct genl_family thermal_event_genl_family = {
>>> + .id = GENL_ID_GENERATE,
>>> + .name = THERMAL_GENL_FAMILY_NAME,
>>> + .version = THERMAL_GENL_VERSION,
>>> + .maxattr = THERMAL_GENL_ATTR_MAX,
>>> +};
>>> +
>>> +static struct genl_multicast_group thermal_event_mcgrp = {
>>> + .name = THERMAL_GENL_MCAST_GROUP_NAME,
>>> +};
>>> +
>>> +int thermal_generate_netlink_event(struct thermal_zone_device *tz,
>>> + enum events event)
>>> +{
>>> + struct sk_buff *skb;
>>> + struct nlattr *attr;
>>> + struct thermal_genl_event *thermal_event;
>>> + void *msg_header;
>>> + int size;
>>> + int result;
>>> + static unsigned int thermal_event_seqnum;
>>> +
>>> + if (!tz)
>>> + return -EINVAL;
>>> +
>>> + /* allocate memory */
>>> + size = nla_total_size(sizeof(struct thermal_genl_event)) +
>>> + nla_total_size(0);
>>> +
>>> + skb = genlmsg_new(size, GFP_ATOMIC);
>>> + if (!skb)
>>> + return -ENOMEM;
>>> +
>>> + /* add the genetlink message header */
>>> + msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++,
>>> + &thermal_event_genl_family, 0,
>>> + THERMAL_GENL_CMD_EVENT);
>>> + if (!msg_header) {
>>> + nlmsg_free(skb);
>>> + return -ENOMEM;
>>> + }
>>> +
>>> + /* fill the data */
>>> + attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT,
>>> + sizeof(struct thermal_genl_event));
>>> +
>>> + if (!attr) {
>>> + nlmsg_free(skb);
>>> + return -EINVAL;
>>> + }
>>> +
>>> + thermal_event = nla_data(attr);
>>> + if (!thermal_event) {
>>> + nlmsg_free(skb);
>>> + return -EINVAL;
>>> + }
>>> +
>>> + memset(thermal_event, 0, sizeof(struct thermal_genl_event));
>>> +
>>> + thermal_event->orig = tz->id;
>>> + thermal_event->event = event;
>>> +
>>> + /* send multicast genetlink message */
>>> + result = genlmsg_end(skb, msg_header);
>>> + if (result < 0) {
>>> + nlmsg_free(skb);
>>> + return result;
>>> + }
>>> +
>>> + result = genlmsg_multicast(skb, 0, thermal_event_mcgrp.id, GFP_ATOMIC);
>>> + if (result)
>>> + dev_err(&tz->device, "Failed to send netlink event:%d", result);
>>> +
>>> + return result;
>>> +}
>>> +EXPORT_SYMBOL(thermal_generate_netlink_event);
>>> +
>>> +static int genetlink_init(void)
>>> +{
>>> + int result;
>>> +
>>> + result = genl_register_family(&thermal_event_genl_family);
>>> + if (result)
>>> + return result;
>>> +
>>> + result = genl_register_mc_group(&thermal_event_genl_family,
>>> + &thermal_event_mcgrp);
>>> + if (result)
>>> + genl_unregister_family(&thermal_event_genl_family);
>>> + return result;
>>> +}
>>> +
>>> +static void genetlink_exit(void)
>>> +{
>>> + genl_unregister_family(&thermal_event_genl_family);
>>> +}
>>> +#else /* !CONFIG_NET */
>>> +static inline int genetlink_init(void) { return 0; }
>>> +static inline void genetlink_exit(void) {}
>>> +#endif /* !CONFIG_NET */
>>> +
>>> +static int __init thermal_init(void)
>>> +{
>>> + int result = 0;
>>> +
>>> + result = class_register(&thermal_class);
>>> + if (result) {
>>> + idr_destroy(&thermal_tz_idr);
>>> + idr_destroy(&thermal_cdev_idr);
>>> + mutex_destroy(&thermal_idr_lock);
>>> + mutex_destroy(&thermal_list_lock);
>>> + return result;
>>> + }
>>> + result = genetlink_init();
>>> + return result;
>>> +}
>>> +
>>> +static void __exit thermal_exit(void)
>>> +{
>>> + class_unregister(&thermal_class);
>>> + idr_destroy(&thermal_tz_idr);
>>> + idr_destroy(&thermal_cdev_idr);
>>> + mutex_destroy(&thermal_idr_lock);
>>> + mutex_destroy(&thermal_list_lock);
>>> + genetlink_exit();
>>> +}
>>> +
>>> +fs_initcall(thermal_init);
>>> +module_exit(thermal_exit);
>>> diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c
>>> deleted file mode 100644
>>> index 5b7863a..0000000
>>> --- a/drivers/thermal/thermal_sys.c
>>> +++ /dev/null
>>> @@ -1,1888 +0,0 @@
>>> -/*
>>> - * thermal.c - Generic Thermal Management Sysfs support.
>>> - *
>>> - * Copyright (C) 2008 Intel Corp
>>> - * Copyright (C) 2008 Zhang Rui <rui.zhang@...el.com>
>>> - * Copyright (C) 2008 Sujith Thomas <sujith.thomas@...el.com>
>>> - *
>>> - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>> - *
>>> - * This program is free software; you can redistribute it and/or modify
>>> - * it under the terms of the GNU General Public License as published by
>>> - * the Free Software Foundation; version 2 of the License.
>>> - *
>>> - * This program is distributed in the hope that it will be useful, but
>>> - * WITHOUT ANY WARRANTY; without even the implied warranty of
>>> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>>> - * General Public License for more details.
>>> - *
>>> - * You should have received a copy of the GNU General Public License along
>>> - * with this program; if not, write to the Free Software Foundation, Inc.,
>>> - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
>>> - *
>>> - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>> - */
>>> -
>>> -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
>>> -
>>> -#include <linux/module.h>
>>> -#include <linux/device.h>
>>> -#include <linux/err.h>
>>> -#include <linux/slab.h>
>>> -#include <linux/kdev_t.h>
>>> -#include <linux/idr.h>
>>> -#include <linux/thermal.h>
>>> -#include <linux/reboot.h>
>>> -#include <net/netlink.h>
>>> -#include <net/genetlink.h>
>>> -
>>> -#include "thermal_core.h"
>>> -
>>> -MODULE_AUTHOR("Zhang Rui");
>>> -MODULE_DESCRIPTION("Generic thermal management sysfs support");
>>> -MODULE_LICENSE("GPL");
>>> -
>>> -static DEFINE_IDR(thermal_tz_idr);
>>> -static DEFINE_IDR(thermal_cdev_idr);
>>> -static DEFINE_MUTEX(thermal_idr_lock);
>>> -
>>> -static LIST_HEAD(thermal_tz_list);
>>> -static LIST_HEAD(thermal_cdev_list);
>>> -static LIST_HEAD(thermal_governor_list);
>>> -
>>> -static DEFINE_MUTEX(thermal_list_lock);
>>> -static DEFINE_MUTEX(thermal_governor_lock);
>>> -
>>> -static struct thermal_governor *__find_governor(const char *name)
>>> -{
>>> - struct thermal_governor *pos;
>>> -
>>> - list_for_each_entry(pos, &thermal_governor_list, governor_list)
>>> - if (!strnicmp(name, pos->name, THERMAL_NAME_LENGTH))
>>> - return pos;
>>> -
>>> - return NULL;
>>> -}
>>> -
>>> -int thermal_register_governor(struct thermal_governor *governor)
>>> -{
>>> - int err;
>>> - const char *name;
>>> - struct thermal_zone_device *pos;
>>> -
>>> - if (!governor)
>>> - return -EINVAL;
>>> -
>>> - mutex_lock(&thermal_governor_lock);
>>> -
>>> - err = -EBUSY;
>>> - if (__find_governor(governor->name) == NULL) {
>>> - err = 0;
>>> - list_add(&governor->governor_list, &thermal_governor_list);
>>> - }
>>> -
>>> - mutex_lock(&thermal_list_lock);
>>> -
>>> - list_for_each_entry(pos, &thermal_tz_list, node) {
>>> - if (pos->governor)
>>> - continue;
>>> - if (pos->tzp)
>>> - name = pos->tzp->governor_name;
>>> - else
>>> - name = DEFAULT_THERMAL_GOVERNOR;
>>> - if (!strnicmp(name, governor->name, THERMAL_NAME_LENGTH))
>>> - pos->governor = governor;
>>> - }
>>> -
>>> - mutex_unlock(&thermal_list_lock);
>>> - mutex_unlock(&thermal_governor_lock);
>>> -
>>> - return err;
>>> -}
>>> -EXPORT_SYMBOL_GPL(thermal_register_governor);
>>> -
>>> -void thermal_unregister_governor(struct thermal_governor *governor)
>>> -{
>>> - struct thermal_zone_device *pos;
>>> -
>>> - if (!governor)
>>> - return;
>>> -
>>> - mutex_lock(&thermal_governor_lock);
>>> -
>>> - if (__find_governor(governor->name) == NULL)
>>> - goto exit;
>>> -
>>> - mutex_lock(&thermal_list_lock);
>>> -
>>> - list_for_each_entry(pos, &thermal_tz_list, node) {
>>> - if (!strnicmp(pos->governor->name, governor->name,
>>> - THERMAL_NAME_LENGTH))
>>> - pos->governor = NULL;
>>> - }
>>> -
>>> - mutex_unlock(&thermal_list_lock);
>>> - list_del(&governor->governor_list);
>>> -exit:
>>> - mutex_unlock(&thermal_governor_lock);
>>> - return;
>>> -}
>>> -EXPORT_SYMBOL_GPL(thermal_unregister_governor);
>>> -
>>> -static int get_idr(struct idr *idr, struct mutex *lock, int *id)
>>> -{
>>> - int ret;
>>> -
>>> - if (lock)
>>> - mutex_lock(lock);
>>> - ret = idr_alloc(idr, NULL, 0, 0, GFP_KERNEL);
>>> - if (lock)
>>> - mutex_unlock(lock);
>>> - if (unlikely(ret < 0))
>>> - return ret;
>>> - *id = ret;
>>> - return 0;
>>> -}
>>> -
>>> -static void release_idr(struct idr *idr, struct mutex *lock, int id)
>>> -{
>>> - if (lock)
>>> - mutex_lock(lock);
>>> - idr_remove(idr, id);
>>> - if (lock)
>>> - mutex_unlock(lock);
>>> -}
>>> -
>>> -int get_tz_trend(struct thermal_zone_device *tz, int trip)
>>> -{
>>> - enum thermal_trend trend;
>>> -
>>> - if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) {
>>> - if (tz->temperature > tz->last_temperature)
>>> - trend = THERMAL_TREND_RAISING;
>>> - else if (tz->temperature < tz->last_temperature)
>>> - trend = THERMAL_TREND_DROPPING;
>>> - else
>>> - trend = THERMAL_TREND_STABLE;
>>> - }
>>> -
>>> - return trend;
>>> -}
>>> -EXPORT_SYMBOL(get_tz_trend);
>>> -
>>> -struct thermal_instance *get_thermal_instance(struct thermal_zone_device *tz,
>>> - struct thermal_cooling_device *cdev, int trip)
>>> -{
>>> - struct thermal_instance *pos = NULL;
>>> - struct thermal_instance *target_instance = NULL;
>>> -
>>> - mutex_lock(&tz->lock);
>>> - mutex_lock(&cdev->lock);
>>> -
>>> - list_for_each_entry(pos, &tz->thermal_instances, tz_node) {
>>> - if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
>>> - target_instance = pos;
>>> - break;
>>> - }
>>> - }
>>> -
>>> - mutex_unlock(&cdev->lock);
>>> - mutex_unlock(&tz->lock);
>>> -
>>> - return target_instance;
>>> -}
>>> -EXPORT_SYMBOL(get_thermal_instance);
>>> -
>>> -static void print_bind_err_msg(struct thermal_zone_device *tz,
>>> - struct thermal_cooling_device *cdev, int ret)
>>> -{
>>> - 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)
>>> -{
>>> - int i, ret;
>>> -
>>> - for (i = 0; i < tz->trips; i++) {
>>> - if (mask & (1 << i)) {
>>> - ret = thermal_zone_bind_cooling_device(tz, i, cdev,
>>> - THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
>>> - if (ret)
>>> - print_bind_err_msg(tz, cdev, ret);
>>> - }
>>> - }
>>> -}
>>> -
>>> -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);
>>> -}
>>> -
>>> -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->tzp && pos->ops->bind) {
>>> - ret = pos->ops->bind(pos, cdev);
>>> - if (ret)
>>> - print_bind_err_msg(pos, cdev, ret);
>>> - }
>>> -
>>> - 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);
>>> - }
>>> - }
>>> -
>>> - mutex_unlock(&thermal_list_lock);
>>> -}
>>> -
>>> -static void bind_tz(struct thermal_zone_device *tz)
>>> -{
>>> - int i, ret;
>>> - struct thermal_cooling_device *pos = NULL;
>>> - const struct thermal_zone_params *tzp = tz->tzp;
>>> -
>>> - if (!tzp && !tz->ops->bind)
>>> - return;
>>> -
>>> - mutex_lock(&thermal_list_lock);
>>> -
>>> - /* If there is no platform data, try to use ops->bind */
>>> - if (!tzp && 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);
>>> - }
>>> - goto exit;
>>> - }
>>> -
>>> - if (!tzp || !tzp->tbp)
>>> - goto exit;
>>> -
>>> - 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);
>>> - }
>>> - }
>>> -exit:
>>> - mutex_unlock(&thermal_list_lock);
>>> -}
>>> -
>>> -static void thermal_zone_device_set_polling(struct thermal_zone_device *tz,
>>> - int delay)
>>> -{
>>> - if (delay > 1000)
>>> - mod_delayed_work(system_freezable_wq, &tz->poll_queue,
>>> - round_jiffies(msecs_to_jiffies(delay)));
>>> - else if (delay)
>>> - mod_delayed_work(system_freezable_wq, &tz->poll_queue,
>>> - msecs_to_jiffies(delay));
>>> - else
>>> - cancel_delayed_work(&tz->poll_queue);
>>> -}
>>> -
>>> -static void monitor_thermal_zone(struct thermal_zone_device *tz)
>>> -{
>>> - mutex_lock(&tz->lock);
>>> -
>>> - if (tz->passive)
>>> - thermal_zone_device_set_polling(tz, tz->passive_delay);
>>> - else if (tz->polling_delay)
>>> - thermal_zone_device_set_polling(tz, tz->polling_delay);
>>> - else
>>> - thermal_zone_device_set_polling(tz, 0);
>>> -
>>> - mutex_unlock(&tz->lock);
>>> -}
>>> -
>>> -static void handle_non_critical_trips(struct thermal_zone_device *tz,
>>> - int trip, enum thermal_trip_type trip_type)
>>> -{
>>> - if (tz->governor)
>>> - tz->governor->throttle(tz, trip);
>>> -}
>>> -
>>> -static void handle_critical_trips(struct thermal_zone_device *tz,
>>> - int trip, enum thermal_trip_type trip_type)
>>> -{
>>> - long trip_temp;
>>> -
>>> - tz->ops->get_trip_temp(tz, trip, &trip_temp);
>>> -
>>> - /* If we have not crossed the trip_temp, we do not care. */
>>> - if (tz->temperature < trip_temp)
>>> - return;
>>> -
>>> - if (tz->ops->notify)
>>> - tz->ops->notify(tz, trip, trip_type);
>>> -
>>> - if (trip_type == THERMAL_TRIP_CRITICAL) {
>>> - dev_emerg(&tz->device,
>>> - "critical temperature reached(%d C),shutting down\n",
>>> - tz->temperature / 1000);
>>> - orderly_poweroff(true);
>>> - }
>>> -}
>>> -
>>> -static void handle_thermal_trip(struct thermal_zone_device *tz, int trip)
>>> -{
>>> - enum thermal_trip_type type;
>>> -
>>> - tz->ops->get_trip_type(tz, trip, &type);
>>> -
>>> - if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT)
>>> - handle_critical_trips(tz, trip, type);
>>> - else
>>> - handle_non_critical_trips(tz, trip, type);
>>> - /*
>>> - * Alright, we handled this trip successfully.
>>> - * So, start monitoring again.
>>> - */
>>> - monitor_thermal_zone(tz);
>>> -}
>>> -
>>> -static int thermal_zone_get_temp(struct thermal_zone_device *tz,
>>> - unsigned long *temp)
>>> -{
>>> - int ret = 0;
>>> -#ifdef CONFIG_THERMAL_EMULATION
>>> - int count;
>>> - unsigned long crit_temp = -1UL;
>>> - enum thermal_trip_type type;
>>> -#endif
>>> -
>>> - mutex_lock(&tz->lock);
>>> -
>>> - ret = tz->ops->get_temp(tz, temp);
>>> -#ifdef CONFIG_THERMAL_EMULATION
>>> - if (!tz->emul_temperature)
>>> - goto skip_emul;
>>> -
>>> - for (count = 0; count < tz->trips; count++) {
>>> - ret = tz->ops->get_trip_type(tz, count, &type);
>>> - if (!ret && type == THERMAL_TRIP_CRITICAL) {
>>> - ret = tz->ops->get_trip_temp(tz, count, &crit_temp);
>>> - break;
>>> - }
>>> - }
>>> -
>>> - if (ret)
>>> - goto skip_emul;
>>> -
>>> - if (*temp < crit_temp)
>>> - *temp = tz->emul_temperature;
>>> -skip_emul:
>>> -#endif
>>> - mutex_unlock(&tz->lock);
>>> - return ret;
>>> -}
>>> -
>>> -static void update_temperature(struct thermal_zone_device *tz)
>>> -{
>>> - long temp;
>>> - int ret;
>>> -
>>> - ret = thermal_zone_get_temp(tz, &temp);
>>> - if (ret) {
>>> - dev_warn(&tz->device, "failed to read out thermal zone %d\n",
>>> - tz->id);
>>> - return;
>>> - }
>>> -
>>> - mutex_lock(&tz->lock);
>>> - tz->last_temperature = tz->temperature;
>>> - tz->temperature = temp;
>>> - mutex_unlock(&tz->lock);
>>> -}
>>> -
>>> -void thermal_zone_device_update(struct thermal_zone_device *tz)
>>> -{
>>> - int count;
>>> -
>>> - update_temperature(tz);
>>> -
>>> - for (count = 0; count < tz->trips; count++)
>>> - handle_thermal_trip(tz, count);
>>> -}
>>> -EXPORT_SYMBOL(thermal_zone_device_update);
>>> -
>>> -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);
>>> - thermal_zone_device_update(tz);
>>> -}
>>> -
>>> -/* sys I/F for thermal zone */
>>> -
>>> -#define to_thermal_zone(_dev) \
>>> - container_of(_dev, struct thermal_zone_device, device)
>>> -
>>> -static ssize_t
>>> -type_show(struct device *dev, struct device_attribute *attr, char *buf)
>>> -{
>>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> -
>>> - return sprintf(buf, "%s\n", tz->type);
>>> -}
>>> -
>>> -static ssize_t
>>> -temp_show(struct device *dev, struct device_attribute *attr, char *buf)
>>> -{
>>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> - long temperature;
>>> - int ret;
>>> -
>>> - ret = thermal_zone_get_temp(tz, &temperature);
>>> -
>>> - if (ret)
>>> - return ret;
>>> -
>>> - return sprintf(buf, "%ld\n", temperature);
>>> -}
>>> -
>>> -static ssize_t
>>> -mode_show(struct device *dev, struct device_attribute *attr, char *buf)
>>> -{
>>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> - enum thermal_device_mode mode;
>>> - int result;
>>> -
>>> - if (!tz->ops->get_mode)
>>> - return -EPERM;
>>> -
>>> - result = tz->ops->get_mode(tz, &mode);
>>> - if (result)
>>> - return result;
>>> -
>>> - return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled"
>>> - : "disabled");
>>> -}
>>> -
>>> -static ssize_t
>>> -mode_store(struct device *dev, struct device_attribute *attr,
>>> - const char *buf, size_t count)
>>> -{
>>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> - int result;
>>> -
>>> - if (!tz->ops->set_mode)
>>> - return -EPERM;
>>> -
>>> - if (!strncmp(buf, "enabled", sizeof("enabled") - 1))
>>> - result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED);
>>> - else if (!strncmp(buf, "disabled", sizeof("disabled") - 1))
>>> - result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED);
>>> - else
>>> - result = -EINVAL;
>>> -
>>> - if (result)
>>> - return result;
>>> -
>>> - return count;
>>> -}
>>> -
>>> -static ssize_t
>>> -trip_point_type_show(struct device *dev, struct device_attribute *attr,
>>> - char *buf)
>>> -{
>>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> - enum thermal_trip_type type;
>>> - int trip, result;
>>> -
>>> - if (!tz->ops->get_trip_type)
>>> - return -EPERM;
>>> -
>>> - if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip))
>>> - return -EINVAL;
>>> -
>>> - result = tz->ops->get_trip_type(tz, trip, &type);
>>> - if (result)
>>> - return result;
>>> -
>>> - switch (type) {
>>> - case THERMAL_TRIP_CRITICAL:
>>> - return sprintf(buf, "critical\n");
>>> - case THERMAL_TRIP_HOT:
>>> - return sprintf(buf, "hot\n");
>>> - case THERMAL_TRIP_PASSIVE:
>>> - return sprintf(buf, "passive\n");
>>> - case THERMAL_TRIP_ACTIVE:
>>> - return sprintf(buf, "active\n");
>>> - default:
>>> - return sprintf(buf, "unknown\n");
>>> - }
>>> -}
>>> -
>>> -static ssize_t
>>> -trip_point_temp_store(struct device *dev, struct device_attribute *attr,
>>> - const char *buf, size_t count)
>>> -{
>>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> - int trip, ret;
>>> - unsigned long temperature;
>>> -
>>> - if (!tz->ops->set_trip_temp)
>>> - return -EPERM;
>>> -
>>> - if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip))
>>> - return -EINVAL;
>>> -
>>> - if (kstrtoul(buf, 10, &temperature))
>>> - return -EINVAL;
>>> -
>>> - ret = tz->ops->set_trip_temp(tz, trip, temperature);
>>> -
>>> - return ret ? ret : count;
>>> -}
>>> -
>>> -static ssize_t
>>> -trip_point_temp_show(struct device *dev, struct device_attribute *attr,
>>> - char *buf)
>>> -{
>>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> - int trip, ret;
>>> - long temperature;
>>> -
>>> - if (!tz->ops->get_trip_temp)
>>> - return -EPERM;
>>> -
>>> - if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip))
>>> - return -EINVAL;
>>> -
>>> - ret = tz->ops->get_trip_temp(tz, trip, &temperature);
>>> -
>>> - if (ret)
>>> - return ret;
>>> -
>>> - return sprintf(buf, "%ld\n", temperature);
>>> -}
>>> -
>>> -static ssize_t
>>> -trip_point_hyst_store(struct device *dev, struct device_attribute *attr,
>>> - const char *buf, size_t count)
>>> -{
>>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> - int trip, ret;
>>> - unsigned long temperature;
>>> -
>>> - if (!tz->ops->set_trip_hyst)
>>> - return -EPERM;
>>> -
>>> - if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip))
>>> - return -EINVAL;
>>> -
>>> - if (kstrtoul(buf, 10, &temperature))
>>> - return -EINVAL;
>>> -
>>> - /*
>>> - * We are not doing any check on the 'temperature' value
>>> - * here. The driver implementing 'set_trip_hyst' has to
>>> - * take care of this.
>>> - */
>>> - ret = tz->ops->set_trip_hyst(tz, trip, temperature);
>>> -
>>> - return ret ? ret : count;
>>> -}
>>> -
>>> -static ssize_t
>>> -trip_point_hyst_show(struct device *dev, struct device_attribute *attr,
>>> - char *buf)
>>> -{
>>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> - int trip, ret;
>>> - unsigned long temperature;
>>> -
>>> - if (!tz->ops->get_trip_hyst)
>>> - return -EPERM;
>>> -
>>> - if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip))
>>> - return -EINVAL;
>>> -
>>> - ret = tz->ops->get_trip_hyst(tz, trip, &temperature);
>>> -
>>> - return ret ? ret : sprintf(buf, "%ld\n", temperature);
>>> -}
>>> -
>>> -static ssize_t
>>> -passive_store(struct device *dev, struct device_attribute *attr,
>>> - const char *buf, size_t count)
>>> -{
>>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> - struct thermal_cooling_device *cdev = NULL;
>>> - int state;
>>> -
>>> - if (!sscanf(buf, "%d\n", &state))
>>> - return -EINVAL;
>>> -
>>> - /* sanity check: values below 1000 millicelcius don't make sense
>>> - * and can cause the system to go into a thermal heart attack
>>> - */
>>> - if (state && state < 1000)
>>> - return -EINVAL;
>>> -
>>> - if (state && !tz->forced_passive) {
>>> - mutex_lock(&thermal_list_lock);
>>> - list_for_each_entry(cdev, &thermal_cdev_list, node) {
>>> - if (!strncmp("Processor", cdev->type,
>>> - sizeof("Processor")))
>>> - thermal_zone_bind_cooling_device(tz,
>>> - THERMAL_TRIPS_NONE, cdev,
>>> - THERMAL_NO_LIMIT,
>>> - THERMAL_NO_LIMIT);
>>> - }
>>> - mutex_unlock(&thermal_list_lock);
>>> - if (!tz->passive_delay)
>>> - tz->passive_delay = 1000;
>>> - } else if (!state && tz->forced_passive) {
>>> - mutex_lock(&thermal_list_lock);
>>> - list_for_each_entry(cdev, &thermal_cdev_list, node) {
>>> - if (!strncmp("Processor", cdev->type,
>>> - sizeof("Processor")))
>>> - thermal_zone_unbind_cooling_device(tz,
>>> - THERMAL_TRIPS_NONE,
>>> - cdev);
>>> - }
>>> - mutex_unlock(&thermal_list_lock);
>>> - tz->passive_delay = 0;
>>> - }
>>> -
>>> - tz->forced_passive = state;
>>> -
>>> - thermal_zone_device_update(tz);
>>> -
>>> - return count;
>>> -}
>>> -
>>> -static ssize_t
>>> -passive_show(struct device *dev, struct device_attribute *attr,
>>> - char *buf)
>>> -{
>>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> -
>>> - return sprintf(buf, "%d\n", tz->forced_passive);
>>> -}
>>> -
>>> -static ssize_t
>>> -policy_store(struct device *dev, struct device_attribute *attr,
>>> - const char *buf, size_t count)
>>> -{
>>> - int ret = -EINVAL;
>>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> - struct thermal_governor *gov;
>>> -
>>> - mutex_lock(&thermal_governor_lock);
>>> -
>>> - gov = __find_governor(buf);
>>> - if (!gov)
>>> - goto exit;
>>> -
>>> - tz->governor = gov;
>>> - ret = count;
>>> -
>>> -exit:
>>> - mutex_unlock(&thermal_governor_lock);
>>> - return ret;
>>> -}
>>> -
>>> -static ssize_t
>>> -policy_show(struct device *dev, struct device_attribute *devattr, char *buf)
>>> -{
>>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> -
>>> - return sprintf(buf, "%s\n", tz->governor->name);
>>> -}
>>> -
>>> -#ifdef CONFIG_THERMAL_EMULATION
>>> -static ssize_t
>>> -emul_temp_store(struct device *dev, struct device_attribute *attr,
>>> - const char *buf, size_t count)
>>> -{
>>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
>>> - int ret = 0;
>>> - unsigned long temperature;
>>> -
>>> - if (kstrtoul(buf, 10, &temperature))
>>> - return -EINVAL;
>>> -
>>> - if (!tz->ops->set_emul_temp) {
>>> - mutex_lock(&tz->lock);
>>> - tz->emul_temperature = temperature;
>>> - mutex_unlock(&tz->lock);
>>> - } else {
>>> - ret = tz->ops->set_emul_temp(tz, temperature);
>>> - }
>>> -
>>> - return ret ? ret : count;
>>> -}
>>> -static DEVICE_ATTR(emul_temp, S_IWUSR, NULL, emul_temp_store);
>>> -#endif/*CONFIG_THERMAL_EMULATION*/
>>> -
>>> -static DEVICE_ATTR(type, 0444, type_show, NULL);
>>> -static DEVICE_ATTR(temp, 0444, temp_show, NULL);
>>> -static DEVICE_ATTR(mode, 0644, mode_show, mode_store);
>>> -static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store);
>>> -static DEVICE_ATTR(policy, S_IRUGO | S_IWUSR, policy_show, policy_store);
>>> -
>>> -/* sys I/F for cooling device */
>>> -#define to_cooling_device(_dev) \
>>> - container_of(_dev, struct thermal_cooling_device, device)
>>> -
>>> -static ssize_t
>>> -thermal_cooling_device_type_show(struct device *dev,
>>> - struct device_attribute *attr, char *buf)
>>> -{
>>> - struct thermal_cooling_device *cdev = to_cooling_device(dev);
>>> -
>>> - return sprintf(buf, "%s\n", cdev->type);
>>> -}
>>> -
>>> -static ssize_t
>>> -thermal_cooling_device_max_state_show(struct device *dev,
>>> - struct device_attribute *attr, char *buf)
>>> -{
>>> - struct thermal_cooling_device *cdev = to_cooling_device(dev);
>>> - unsigned long state;
>>> - int ret;
>>> -
>>> - ret = cdev->ops->get_max_state(cdev, &state);
>>> - if (ret)
>>> - return ret;
>>> - return sprintf(buf, "%ld\n", state);
>>> -}
>>> -
>>> -static ssize_t
>>> -thermal_cooling_device_cur_state_show(struct device *dev,
>>> - struct device_attribute *attr, char *buf)
>>> -{
>>> - struct thermal_cooling_device *cdev = to_cooling_device(dev);
>>> - unsigned long state;
>>> - int ret;
>>> -
>>> - ret = cdev->ops->get_cur_state(cdev, &state);
>>> - if (ret)
>>> - return ret;
>>> - return sprintf(buf, "%ld\n", state);
>>> -}
>>> -
>>> -static ssize_t
>>> -thermal_cooling_device_cur_state_store(struct device *dev,
>>> - struct device_attribute *attr,
>>> - const char *buf, size_t count)
>>> -{
>>> - struct thermal_cooling_device *cdev = to_cooling_device(dev);
>>> - unsigned long state;
>>> - int result;
>>> -
>>> - if (!sscanf(buf, "%ld\n", &state))
>>> - return -EINVAL;
>>> -
>>> - if ((long)state < 0)
>>> - return -EINVAL;
>>> -
>>> - result = cdev->ops->set_cur_state(cdev, state);
>>> - if (result)
>>> - return result;
>>> - return count;
>>> -}
>>> -
>>> -static struct device_attribute dev_attr_cdev_type =
>>> -__ATTR(type, 0444, thermal_cooling_device_type_show, NULL);
>>> -static DEVICE_ATTR(max_state, 0444,
>>> - thermal_cooling_device_max_state_show, NULL);
>>> -static DEVICE_ATTR(cur_state, 0644,
>>> - thermal_cooling_device_cur_state_show,
>>> - thermal_cooling_device_cur_state_store);
>>> -
>>> -static ssize_t
>>> -thermal_cooling_device_trip_point_show(struct device *dev,
>>> - struct device_attribute *attr, char *buf)
>>> -{
>>> - struct thermal_instance *instance;
>>> -
>>> - instance =
>>> - container_of(attr, struct thermal_instance, attr);
>>> -
>>> - if (instance->trip == THERMAL_TRIPS_NONE)
>>> - return sprintf(buf, "-1\n");
>>> - else
>>> - return sprintf(buf, "%d\n", instance->trip);
>>> -}
>>> -
>>> -/* Device management */
>>> -
>>> -#if defined(CONFIG_THERMAL_HWMON)
>>> -
>>> -/* hwmon sys I/F */
>>> -#include <linux/hwmon.h>
>>> -
>>> -/* thermal zone devices with the same type share one hwmon device */
>>> -struct thermal_hwmon_device {
>>> - char type[THERMAL_NAME_LENGTH];
>>> - struct device *device;
>>> - int count;
>>> - struct list_head tz_list;
>>> - struct list_head node;
>>> -};
>>> -
>>> -struct thermal_hwmon_attr {
>>> - struct device_attribute attr;
>>> - char name[16];
>>> -};
>>> -
>>> -/* one temperature input for each thermal zone */
>>> -struct thermal_hwmon_temp {
>>> - struct list_head hwmon_node;
>>> - struct thermal_zone_device *tz;
>>> - struct thermal_hwmon_attr temp_input; /* hwmon sys attr */
>>> - struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */
>>> -};
>>> -
>>> -static LIST_HEAD(thermal_hwmon_list);
>>> -
>>> -static ssize_t
>>> -name_show(struct device *dev, struct device_attribute *attr, char *buf)
>>> -{
>>> - struct thermal_hwmon_device *hwmon = dev_get_drvdata(dev);
>>> - return sprintf(buf, "%s\n", hwmon->type);
>>> -}
>>> -static DEVICE_ATTR(name, 0444, name_show, NULL);
>>> -
>>> -static ssize_t
>>> -temp_input_show(struct device *dev, struct device_attribute *attr, char *buf)
>>> -{
>>> - long temperature;
>>> - int ret;
>>> - struct thermal_hwmon_attr *hwmon_attr
>>> - = container_of(attr, struct thermal_hwmon_attr, attr);
>>> - struct thermal_hwmon_temp *temp
>>> - = container_of(hwmon_attr, struct thermal_hwmon_temp,
>>> - temp_input);
>>> - struct thermal_zone_device *tz = temp->tz;
>>> -
>>> - ret = thermal_zone_get_temp(tz, &temperature);
>>> -
>>> - if (ret)
>>> - return ret;
>>> -
>>> - return sprintf(buf, "%ld\n", temperature);
>>> -}
>>> -
>>> -static ssize_t
>>> -temp_crit_show(struct device *dev, struct device_attribute *attr,
>>> - char *buf)
>>> -{
>>> - struct thermal_hwmon_attr *hwmon_attr
>>> - = container_of(attr, struct thermal_hwmon_attr, attr);
>>> - struct thermal_hwmon_temp *temp
>>> - = container_of(hwmon_attr, struct thermal_hwmon_temp,
>>> - temp_crit);
>>> - struct thermal_zone_device *tz = temp->tz;
>>> - long temperature;
>>> - int ret;
>>> -
>>> - ret = tz->ops->get_trip_temp(tz, 0, &temperature);
>>> - if (ret)
>>> - return ret;
>>> -
>>> - return sprintf(buf, "%ld\n", temperature);
>>> -}
>>> -
>>> -
>>> -static struct thermal_hwmon_device *
>>> -thermal_hwmon_lookup_by_type(const struct thermal_zone_device *tz)
>>> -{
>>> - struct thermal_hwmon_device *hwmon;
>>> -
>>> - mutex_lock(&thermal_list_lock);
>>> - list_for_each_entry(hwmon, &thermal_hwmon_list, node)
>>> - if (!strcmp(hwmon->type, tz->type)) {
>>> - mutex_unlock(&thermal_list_lock);
>>> - return hwmon;
>>> - }
>>> - mutex_unlock(&thermal_list_lock);
>>> -
>>> - return NULL;
>>> -}
>>> -
>>> -/* Find the temperature input matching a given thermal zone */
>>> -static struct thermal_hwmon_temp *
>>> -thermal_hwmon_lookup_temp(const struct thermal_hwmon_device *hwmon,
>>> - const struct thermal_zone_device *tz)
>>> -{
>>> - struct thermal_hwmon_temp *temp;
>>> -
>>> - mutex_lock(&thermal_list_lock);
>>> - list_for_each_entry(temp, &hwmon->tz_list, hwmon_node)
>>> - if (temp->tz == tz) {
>>> - mutex_unlock(&thermal_list_lock);
>>> - return temp;
>>> - }
>>> - mutex_unlock(&thermal_list_lock);
>>> -
>>> - return NULL;
>>> -}
>>> -
>>> -static int
>>> -thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
>>> -{
>>> - struct thermal_hwmon_device *hwmon;
>>> - struct thermal_hwmon_temp *temp;
>>> - int new_hwmon_device = 1;
>>> - int result;
>>> -
>>> - hwmon = thermal_hwmon_lookup_by_type(tz);
>>> - if (hwmon) {
>>> - new_hwmon_device = 0;
>>> - goto register_sys_interface;
>>> - }
>>> -
>>> - hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL);
>>> - if (!hwmon)
>>> - return -ENOMEM;
>>> -
>>> - INIT_LIST_HEAD(&hwmon->tz_list);
>>> - strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH);
>>> - hwmon->device = hwmon_device_register(NULL);
>>> - if (IS_ERR(hwmon->device)) {
>>> - result = PTR_ERR(hwmon->device);
>>> - goto free_mem;
>>> - }
>>> - dev_set_drvdata(hwmon->device, hwmon);
>>> - result = device_create_file(hwmon->device, &dev_attr_name);
>>> - if (result)
>>> - goto free_mem;
>>> -
>>> - register_sys_interface:
>>> - temp = kzalloc(sizeof(struct thermal_hwmon_temp), GFP_KERNEL);
>>> - if (!temp) {
>>> - result = -ENOMEM;
>>> - goto unregister_name;
>>> - }
>>> -
>>> - temp->tz = tz;
>>> - hwmon->count++;
>>> -
>>> - snprintf(temp->temp_input.name, sizeof(temp->temp_input.name),
>>> - "temp%d_input", hwmon->count);
>>> - temp->temp_input.attr.attr.name = temp->temp_input.name;
>>> - temp->temp_input.attr.attr.mode = 0444;
>>> - temp->temp_input.attr.show = temp_input_show;
>>> - sysfs_attr_init(&temp->temp_input.attr.attr);
>>> - result = device_create_file(hwmon->device, &temp->temp_input.attr);
>>> - if (result)
>>> - goto free_temp_mem;
>>> -
>>> - if (tz->ops->get_crit_temp) {
>>> - unsigned long temperature;
>>> - if (!tz->ops->get_crit_temp(tz, &temperature)) {
>>> - snprintf(temp->temp_crit.name,
>>> - sizeof(temp->temp_crit.name),
>>> - "temp%d_crit", hwmon->count);
>>> - temp->temp_crit.attr.attr.name = temp->temp_crit.name;
>>> - temp->temp_crit.attr.attr.mode = 0444;
>>> - temp->temp_crit.attr.show = temp_crit_show;
>>> - sysfs_attr_init(&temp->temp_crit.attr.attr);
>>> - result = device_create_file(hwmon->device,
>>> - &temp->temp_crit.attr);
>>> - if (result)
>>> - goto unregister_input;
>>> - }
>>> - }
>>> -
>>> - mutex_lock(&thermal_list_lock);
>>> - if (new_hwmon_device)
>>> - list_add_tail(&hwmon->node, &thermal_hwmon_list);
>>> - list_add_tail(&temp->hwmon_node, &hwmon->tz_list);
>>> - mutex_unlock(&thermal_list_lock);
>>> -
>>> - return 0;
>>> -
>>> - unregister_input:
>>> - device_remove_file(hwmon->device, &temp->temp_input.attr);
>>> - free_temp_mem:
>>> - kfree(temp);
>>> - unregister_name:
>>> - if (new_hwmon_device) {
>>> - device_remove_file(hwmon->device, &dev_attr_name);
>>> - hwmon_device_unregister(hwmon->device);
>>> - }
>>> - free_mem:
>>> - if (new_hwmon_device)
>>> - kfree(hwmon);
>>> -
>>> - return result;
>>> -}
>>> -
>>> -static void
>>> -thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz)
>>> -{
>>> - struct thermal_hwmon_device *hwmon;
>>> - struct thermal_hwmon_temp *temp;
>>> -
>>> - hwmon = thermal_hwmon_lookup_by_type(tz);
>>> - if (unlikely(!hwmon)) {
>>> - /* Should never happen... */
>>> - dev_dbg(&tz->device, "hwmon device lookup failed!\n");
>>> - return;
>>> - }
>>> -
>>> - temp = thermal_hwmon_lookup_temp(hwmon, tz);
>>> - if (unlikely(!temp)) {
>>> - /* Should never happen... */
>>> - dev_dbg(&tz->device, "temperature input lookup failed!\n");
>>> - return;
>>> - }
>>> -
>>> - device_remove_file(hwmon->device, &temp->temp_input.attr);
>>> - if (tz->ops->get_crit_temp)
>>> - device_remove_file(hwmon->device, &temp->temp_crit.attr);
>>> -
>>> - mutex_lock(&thermal_list_lock);
>>> - list_del(&temp->hwmon_node);
>>> - kfree(temp);
>>> - if (!list_empty(&hwmon->tz_list)) {
>>> - mutex_unlock(&thermal_list_lock);
>>> - return;
>>> - }
>>> - list_del(&hwmon->node);
>>> - mutex_unlock(&thermal_list_lock);
>>> -
>>> - device_remove_file(hwmon->device, &dev_attr_name);
>>> - hwmon_device_unregister(hwmon->device);
>>> - kfree(hwmon);
>>> -}
>>> -#else
>>> -static int
>>> -thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
>>> -{
>>> - return 0;
>>> -}
>>> -
>>> -static void
>>> -thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz)
>>> -{
>>> -}
>>> -#endif
>>> -
>>> -/**
>>> - * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone
>>> - * @tz: thermal zone device
>>> - * @trip: indicates which trip point the cooling devices is
>>> - * associated with in this thermal zone.
>>> - * @cdev: thermal cooling device
>>> - *
>>> - * This function is usually called in the thermal zone device .bind callback.
>>> - */
>>> -int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
>>> - int trip,
>>> - struct thermal_cooling_device *cdev,
>>> - unsigned long upper, unsigned long lower)
>>> -{
>>> - struct thermal_instance *dev;
>>> - struct thermal_instance *pos;
>>> - struct thermal_zone_device *pos1;
>>> - struct thermal_cooling_device *pos2;
>>> - unsigned long max_state;
>>> - int result;
>>> -
>>> - if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE))
>>> - return -EINVAL;
>>> -
>>> - 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)
>>> - return -EINVAL;
>>> -
>>> - cdev->ops->get_max_state(cdev, &max_state);
>>> -
>>> - /* 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;
>>> -
>>> - dev =
>>> - kzalloc(sizeof(struct thermal_instance), GFP_KERNEL);
>>> - if (!dev)
>>> - return -ENOMEM;
>>> - dev->tz = tz;
>>> - dev->cdev = cdev;
>>> - dev->trip = trip;
>>> - dev->upper = upper;
>>> - dev->lower = lower;
>>> - dev->target = THERMAL_NO_TARGET;
>>> -
>>> - result = get_idr(&tz->idr, &tz->lock, &dev->id);
>>> - if (result)
>>> - goto free_mem;
>>> -
>>> - sprintf(dev->name, "cdev%d", dev->id);
>>> - result =
>>> - sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name);
>>> - if (result)
>>> - goto release_idr;
>>> -
>>> - sprintf(dev->attr_name, "cdev%d_trip_point", dev->id);
>>> - sysfs_attr_init(&dev->attr.attr);
>>> - dev->attr.attr.name = dev->attr_name;
>>> - dev->attr.attr.mode = 0444;
>>> - dev->attr.show = thermal_cooling_device_trip_point_show;
>>> - result = device_create_file(&tz->device, &dev->attr);
>>> - if (result)
>>> - goto remove_symbol_link;
>>> -
>>> - mutex_lock(&tz->lock);
>>> - mutex_lock(&cdev->lock);
>>> - list_for_each_entry(pos, &tz->thermal_instances, tz_node)
>>> - if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
>>> - result = -EEXIST;
>>> - break;
>>> - }
>>> - if (!result) {
>>> - list_add_tail(&dev->tz_node, &tz->thermal_instances);
>>> - list_add_tail(&dev->cdev_node, &cdev->thermal_instances);
>>> - }
>>> - mutex_unlock(&cdev->lock);
>>> - mutex_unlock(&tz->lock);
>>> -
>>> - if (!result)
>>> - return 0;
>>> -
>>> - device_remove_file(&tz->device, &dev->attr);
>>> -remove_symbol_link:
>>> - sysfs_remove_link(&tz->device.kobj, dev->name);
>>> -release_idr:
>>> - release_idr(&tz->idr, &tz->lock, dev->id);
>>> -free_mem:
>>> - kfree(dev);
>>> - return result;
>>> -}
>>> -EXPORT_SYMBOL(thermal_zone_bind_cooling_device);
>>> -
>>> -/**
>>> - * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone
>>> - * @tz: thermal zone device
>>> - * @trip: indicates which trip point the cooling devices is
>>> - * associated with in this thermal zone.
>>> - * @cdev: thermal cooling device
>>> - *
>>> - * This function is usually called in the thermal zone device .unbind callback.
>>> - */
>>> -int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz,
>>> - int trip,
>>> - struct thermal_cooling_device *cdev)
>>> -{
>>> - struct thermal_instance *pos, *next;
>>> -
>>> - mutex_lock(&tz->lock);
>>> - mutex_lock(&cdev->lock);
>>> - list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) {
>>> - if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
>>> - list_del(&pos->tz_node);
>>> - list_del(&pos->cdev_node);
>>> - mutex_unlock(&cdev->lock);
>>> - mutex_unlock(&tz->lock);
>>> - goto unbind;
>>> - }
>>> - }
>>> - mutex_unlock(&cdev->lock);
>>> - mutex_unlock(&tz->lock);
>>> -
>>> - return -ENODEV;
>>> -
>>> -unbind:
>>> - device_remove_file(&tz->device, &pos->attr);
>>> - sysfs_remove_link(&tz->device.kobj, pos->name);
>>> - release_idr(&tz->idr, &tz->lock, pos->id);
>>> - kfree(pos);
>>> - return 0;
>>> -}
>>> -EXPORT_SYMBOL(thermal_zone_unbind_cooling_device);
>>> -
>>> -static void thermal_release(struct device *dev)
>>> -{
>>> - struct thermal_zone_device *tz;
>>> - struct thermal_cooling_device *cdev;
>>> -
>>> - if (!strncmp(dev_name(dev), "thermal_zone",
>>> - sizeof("thermal_zone") - 1)) {
>>> - tz = to_thermal_zone(dev);
>>> - kfree(tz);
>>> - } else {
>>> - cdev = to_cooling_device(dev);
>>> - kfree(cdev);
>>> - }
>>> -}
>>> -
>>> -static struct class thermal_class = {
>>> - .name = "thermal",
>>> - .dev_release = thermal_release,
>>> -};
>>> -
>>> -/**
>>> - * 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.
>>> - */
>>> -struct thermal_cooling_device *
>>> -thermal_cooling_device_register(char *type, void *devdata,
>>> - const struct thermal_cooling_device_ops *ops)
>>> -{
>>> - struct thermal_cooling_device *cdev;
>>> - int result;
>>> -
>>> - if (type && strlen(type) >= THERMAL_NAME_LENGTH)
>>> - return ERR_PTR(-EINVAL);
>>> -
>>> - if (!ops || !ops->get_max_state || !ops->get_cur_state ||
>>> - !ops->set_cur_state)
>>> - return ERR_PTR(-EINVAL);
>>> -
>>> - cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL);
>>> - if (!cdev)
>>> - return ERR_PTR(-ENOMEM);
>>> -
>>> - result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id);
>>> - if (result) {
>>> - kfree(cdev);
>>> - return ERR_PTR(result);
>>> - }
>>> -
>>> - strcpy(cdev->type, type ? : "");
>>> - mutex_init(&cdev->lock);
>>> - INIT_LIST_HEAD(&cdev->thermal_instances);
>>> - cdev->ops = ops;
>>> - cdev->updated = true;
>>> - cdev->device.class = &thermal_class;
>>> - cdev->devdata = devdata;
>>> - dev_set_name(&cdev->device, "cooling_device%d", cdev->id);
>>> - result = device_register(&cdev->device);
>>> - if (result) {
>>> - release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
>>> - kfree(cdev);
>>> - return ERR_PTR(result);
>>> - }
>>> -
>>> - /* sys I/F */
>>> - if (type) {
>>> - result = device_create_file(&cdev->device, &dev_attr_cdev_type);
>>> - if (result)
>>> - goto unregister;
>>> - }
>>> -
>>> - result = device_create_file(&cdev->device, &dev_attr_max_state);
>>> - if (result)
>>> - goto unregister;
>>> -
>>> - result = device_create_file(&cdev->device, &dev_attr_cur_state);
>>> - if (result)
>>> - goto unregister;
>>> -
>>> - /* Add 'this' new cdev to the global cdev list */
>>> - mutex_lock(&thermal_list_lock);
>>> - list_add(&cdev->node, &thermal_cdev_list);
>>> - mutex_unlock(&thermal_list_lock);
>>> -
>>> - /* Update binding information for 'this' new cdev */
>>> - bind_cdev(cdev);
>>> -
>>> - return cdev;
>>> -
>>> -unregister:
>>> - release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
>>> - device_unregister(&cdev->device);
>>> - return ERR_PTR(result);
>>> -}
>>> -EXPORT_SYMBOL(thermal_cooling_device_register);
>>> -
>>> -/**
>>> - * thermal_cooling_device_unregister - removes the registered thermal cooling device
>>> - * @cdev: the thermal cooling device to remove.
>>> - *
>>> - * thermal_cooling_device_unregister() must be called when the device is no
>>> - * longer needed.
>>> - */
>>> -void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev)
>>> -{
>>> - int i;
>>> - const struct thermal_zone_params *tzp;
>>> - 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)
>>> - if (pos == cdev)
>>> - break;
>>> - if (pos != cdev) {
>>> - /* thermal cooling device not found */
>>> - mutex_unlock(&thermal_list_lock);
>>> - return;
>>> - }
>>> - list_del(&cdev->node);
>>> -
>>> - /* Unbind all thermal zones associated with 'this' cdev */
>>> - list_for_each_entry(tz, &thermal_tz_list, node) {
>>> - if (tz->ops->unbind) {
>>> - tz->ops->unbind(tz, cdev);
>>> - continue;
>>> - }
>>> -
>>> - if (!tz->tzp || !tz->tzp->tbp)
>>> - continue;
>>> -
>>> - 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;
>>> - }
>>> - }
>>> - }
>>> -
>>> - mutex_unlock(&thermal_list_lock);
>>> -
>>> - if (cdev->type[0])
>>> - device_remove_file(&cdev->device, &dev_attr_cdev_type);
>>> - device_remove_file(&cdev->device, &dev_attr_max_state);
>>> - device_remove_file(&cdev->device, &dev_attr_cur_state);
>>> -
>>> - release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
>>> - device_unregister(&cdev->device);
>>> - return;
>>> -}
>>> -EXPORT_SYMBOL(thermal_cooling_device_unregister);
>>> -
>>> -void thermal_cdev_update(struct thermal_cooling_device *cdev)
>>> -{
>>> - struct thermal_instance *instance;
>>> - unsigned long target = 0;
>>> -
>>> - /* cooling device is updated*/
>>> - if (cdev->updated)
>>> - return;
>>> -
>>> - mutex_lock(&cdev->lock);
>>> - /* Make sure cdev enters the deepest cooling state */
>>> - list_for_each_entry(instance, &cdev->thermal_instances, cdev_node) {
>>> - if (instance->target == THERMAL_NO_TARGET)
>>> - continue;
>>> - if (instance->target > target)
>>> - target = instance->target;
>>> - }
>>> - mutex_unlock(&cdev->lock);
>>> - cdev->ops->set_cur_state(cdev, target);
>>> - cdev->updated = true;
>>> -}
>>> -EXPORT_SYMBOL(thermal_cdev_update);
>>> -
>>> -/**
>>> - * notify_thermal_framework - Sensor drivers use this API to notify framework
>>> - * @tz: thermal zone device
>>> - * @trip: indicates which trip point has been crossed
>>> - *
>>> - * This function handles the trip events from sensor drivers. It starts
>>> - * throttling the cooling devices according to the policy configured.
>>> - * For CRITICAL and HOT trip points, this notifies the respective drivers,
>>> - * and does actual throttling for other trip points i.e ACTIVE and PASSIVE.
>>> - * The throttling policy is based on the configured platform data; if no
>>> - * platform data is provided, this uses the step_wise throttling policy.
>>> - */
>>> -void notify_thermal_framework(struct thermal_zone_device *tz, int trip)
>>> -{
>>> - handle_thermal_trip(tz, trip);
>>> -}
>>> -EXPORT_SYMBOL(notify_thermal_framework);
>>> -
>>> -/**
>>> - * create_trip_attrs - create attributes for trip points
>>> - * @tz: the thermal zone device
>>> - * @mask: Writeable trip point bitmap.
>>> - */
>>> -static int create_trip_attrs(struct thermal_zone_device *tz, int mask)
>>> -{
>>> - int indx;
>>> - int size = sizeof(struct thermal_attr) * tz->trips;
>>> -
>>> - tz->trip_type_attrs = kzalloc(size, GFP_KERNEL);
>>> - if (!tz->trip_type_attrs)
>>> - return -ENOMEM;
>>> -
>>> - tz->trip_temp_attrs = kzalloc(size, GFP_KERNEL);
>>> - if (!tz->trip_temp_attrs) {
>>> - kfree(tz->trip_type_attrs);
>>> - return -ENOMEM;
>>> - }
>>> -
>>> - if (tz->ops->get_trip_hyst) {
>>> - tz->trip_hyst_attrs = kzalloc(size, GFP_KERNEL);
>>> - if (!tz->trip_hyst_attrs) {
>>> - kfree(tz->trip_type_attrs);
>>> - kfree(tz->trip_temp_attrs);
>>> - return -ENOMEM;
>>> - }
>>> - }
>>> -
>>> -
>>> - for (indx = 0; indx < tz->trips; indx++) {
>>> - /* create trip type attribute */
>>> - snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH,
>>> - "trip_point_%d_type", indx);
>>> -
>>> - sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr);
>>> - tz->trip_type_attrs[indx].attr.attr.name =
>>> - tz->trip_type_attrs[indx].name;
>>> - tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO;
>>> - tz->trip_type_attrs[indx].attr.show = trip_point_type_show;
>>> -
>>> - device_create_file(&tz->device,
>>> - &tz->trip_type_attrs[indx].attr);
>>> -
>>> - /* create trip temp attribute */
>>> - snprintf(tz->trip_temp_attrs[indx].name, THERMAL_NAME_LENGTH,
>>> - "trip_point_%d_temp", indx);
>>> -
>>> - sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr);
>>> - tz->trip_temp_attrs[indx].attr.attr.name =
>>> - tz->trip_temp_attrs[indx].name;
>>> - tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO;
>>> - tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show;
>>> - if (mask & (1 << indx)) {
>>> - tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR;
>>> - tz->trip_temp_attrs[indx].attr.store =
>>> - trip_point_temp_store;
>>> - }
>>> -
>>> - device_create_file(&tz->device,
>>> - &tz->trip_temp_attrs[indx].attr);
>>> -
>>> - /* create Optional trip hyst attribute */
>>> - if (!tz->ops->get_trip_hyst)
>>> - continue;
>>> - snprintf(tz->trip_hyst_attrs[indx].name, THERMAL_NAME_LENGTH,
>>> - "trip_point_%d_hyst", indx);
>>> -
>>> - sysfs_attr_init(&tz->trip_hyst_attrs[indx].attr.attr);
>>> - tz->trip_hyst_attrs[indx].attr.attr.name =
>>> - tz->trip_hyst_attrs[indx].name;
>>> - tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO;
>>> - tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show;
>>> - if (tz->ops->set_trip_hyst) {
>>> - tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR;
>>> - tz->trip_hyst_attrs[indx].attr.store =
>>> - trip_point_hyst_store;
>>> - }
>>> -
>>> - device_create_file(&tz->device,
>>> - &tz->trip_hyst_attrs[indx].attr);
>>> - }
>>> - return 0;
>>> -}
>>> -
>>> -static void remove_trip_attrs(struct thermal_zone_device *tz)
>>> -{
>>> - int indx;
>>> -
>>> - for (indx = 0; indx < tz->trips; indx++) {
>>> - device_remove_file(&tz->device,
>>> - &tz->trip_type_attrs[indx].attr);
>>> - device_remove_file(&tz->device,
>>> - &tz->trip_temp_attrs[indx].attr);
>>> - if (tz->ops->get_trip_hyst)
>>> - device_remove_file(&tz->device,
>>> - &tz->trip_hyst_attrs[indx].attr);
>>> - }
>>> - kfree(tz->trip_type_attrs);
>>> - kfree(tz->trip_temp_attrs);
>>> - kfree(tz->trip_hyst_attrs);
>>> -}
>>> -
>>> -/**
>>> - * thermal_zone_device_register - register a new thermal zone device
>>> - * @type: the thermal zone device type
>>> - * @trips: the number of trip points the thermal zone support
>>> - * @mask: a bit string indicating the writeablility of trip points
>>> - * @devdata: private device data
>>> - * @ops: standard thermal zone device callbacks
>>> - * @tzp: thermal zone platform parameters
>>> - * @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)
>>> - *
>>> - * thermal_zone_device_unregister() must be called when the device is no
>>> - * longer needed. The passive cooling depends on the .get_trend() return value.
>>> - */
>>> -struct thermal_zone_device *thermal_zone_device_register(const char *type,
>>> - int trips, int mask, void *devdata,
>>> - const struct thermal_zone_device_ops *ops,
>>> - const struct thermal_zone_params *tzp,
>>> - int passive_delay, int polling_delay)
>>> -{
>>> - struct thermal_zone_device *tz;
>>> - enum thermal_trip_type trip_type;
>>> - int result;
>>> - int count;
>>> - int passive = 0;
>>> -
>>> - if (type && strlen(type) >= THERMAL_NAME_LENGTH)
>>> - return ERR_PTR(-EINVAL);
>>> -
>>> - if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips)
>>> - return ERR_PTR(-EINVAL);
>>> -
>>> - if (!ops || !ops->get_temp)
>>> - return ERR_PTR(-EINVAL);
>>> -
>>> - if (trips > 0 && !ops->get_trip_type)
>>> - return ERR_PTR(-EINVAL);
>>> -
>>> - tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL);
>>> - if (!tz)
>>> - return ERR_PTR(-ENOMEM);
>>> -
>>> - INIT_LIST_HEAD(&tz->thermal_instances);
>>> - idr_init(&tz->idr);
>>> - mutex_init(&tz->lock);
>>> - result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id);
>>> - if (result) {
>>> - kfree(tz);
>>> - return ERR_PTR(result);
>>> - }
>>> -
>>> - strcpy(tz->type, type ? : "");
>>> - tz->ops = ops;
>>> - tz->tzp = tzp;
>>> - tz->device.class = &thermal_class;
>>> - tz->devdata = devdata;
>>> - tz->trips = trips;
>>> - tz->passive_delay = passive_delay;
>>> - tz->polling_delay = polling_delay;
>>> -
>>> - dev_set_name(&tz->device, "thermal_zone%d", tz->id);
>>> - result = device_register(&tz->device);
>>> - if (result) {
>>> - release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
>>> - kfree(tz);
>>> - return ERR_PTR(result);
>>> - }
>>> -
>>> - /* sys I/F */
>>> - if (type) {
>>> - result = device_create_file(&tz->device, &dev_attr_type);
>>> - if (result)
>>> - goto unregister;
>>> - }
>>> -
>>> - result = device_create_file(&tz->device, &dev_attr_temp);
>>> - if (result)
>>> - goto unregister;
>>> -
>>> - if (ops->get_mode) {
>>> - result = device_create_file(&tz->device, &dev_attr_mode);
>>> - if (result)
>>> - goto unregister;
>>> - }
>>> -
>>> - result = create_trip_attrs(tz, mask);
>>> - if (result)
>>> - goto unregister;
>>> -
>>> - for (count = 0; count < trips; count++) {
>>> - tz->ops->get_trip_type(tz, count, &trip_type);
>>> - if (trip_type == THERMAL_TRIP_PASSIVE)
>>> - passive = 1;
>>> - }
>>> -
>>> - if (!passive) {
>>> - result = device_create_file(&tz->device, &dev_attr_passive);
>>> - if (result)
>>> - goto unregister;
>>> - }
>>> -
>>> -#ifdef CONFIG_THERMAL_EMULATION
>>> - result = device_create_file(&tz->device, &dev_attr_emul_temp);
>>> - if (result)
>>> - goto unregister;
>>> -#endif
>>> - /* Create policy attribute */
>>> - result = device_create_file(&tz->device, &dev_attr_policy);
>>> - if (result)
>>> - goto unregister;
>>> -
>>> - /* Update 'this' zone's governor information */
>>> - mutex_lock(&thermal_governor_lock);
>>> -
>>> - if (tz->tzp)
>>> - tz->governor = __find_governor(tz->tzp->governor_name);
>>> - else
>>> - tz->governor = __find_governor(DEFAULT_THERMAL_GOVERNOR);
>>> -
>>> - mutex_unlock(&thermal_governor_lock);
>>> -
>>> - result = thermal_add_hwmon_sysfs(tz);
>>> - if (result)
>>> - goto unregister;
>>> -
>>> - mutex_lock(&thermal_list_lock);
>>> - list_add_tail(&tz->node, &thermal_tz_list);
>>> - mutex_unlock(&thermal_list_lock);
>>> -
>>> - /* Bind cooling devices for this zone */
>>> - bind_tz(tz);
>>> -
>>> - INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check);
>>> -
>>> - thermal_zone_device_update(tz);
>>> -
>>> - if (!result)
>>> - return tz;
>>> -
>>> -unregister:
>>> - release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
>>> - device_unregister(&tz->device);
>>> - return ERR_PTR(result);
>>> -}
>>> -EXPORT_SYMBOL(thermal_zone_device_register);
>>> -
>>> -/**
>>> - * thermal_device_unregister - removes the registered thermal zone device
>>> - * @tz: the thermal zone device to remove
>>> - */
>>> -void thermal_zone_device_unregister(struct thermal_zone_device *tz)
>>> -{
>>> - int i;
>>> - const struct thermal_zone_params *tzp;
>>> - struct thermal_cooling_device *cdev;
>>> - struct thermal_zone_device *pos = NULL;
>>> -
>>> - if (!tz)
>>> - return;
>>> -
>>> - tzp = tz->tzp;
>>> -
>>> - mutex_lock(&thermal_list_lock);
>>> - list_for_each_entry(pos, &thermal_tz_list, node)
>>> - if (pos == tz)
>>> - break;
>>> - if (pos != tz) {
>>> - /* thermal zone device not found */
>>> - mutex_unlock(&thermal_list_lock);
>>> - return;
>>> - }
>>> - list_del(&tz->node);
>>> -
>>> - /* 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;
>>> - }
>>> - }
>>> - }
>>> -
>>> - mutex_unlock(&thermal_list_lock);
>>> -
>>> - thermal_zone_device_set_polling(tz, 0);
>>> -
>>> - if (tz->type[0])
>>> - device_remove_file(&tz->device, &dev_attr_type);
>>> - device_remove_file(&tz->device, &dev_attr_temp);
>>> - if (tz->ops->get_mode)
>>> - device_remove_file(&tz->device, &dev_attr_mode);
>>> - device_remove_file(&tz->device, &dev_attr_policy);
>>> - remove_trip_attrs(tz);
>>> - tz->governor = NULL;
>>> -
>>> - thermal_remove_hwmon_sysfs(tz);
>>> - release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
>>> - idr_destroy(&tz->idr);
>>> - mutex_destroy(&tz->lock);
>>> - device_unregister(&tz->device);
>>> - return;
>>> -}
>>> -EXPORT_SYMBOL(thermal_zone_device_unregister);
>>> -
>>> -#ifdef CONFIG_NET
>>> -static struct genl_family thermal_event_genl_family = {
>>> - .id = GENL_ID_GENERATE,
>>> - .name = THERMAL_GENL_FAMILY_NAME,
>>> - .version = THERMAL_GENL_VERSION,
>>> - .maxattr = THERMAL_GENL_ATTR_MAX,
>>> -};
>>> -
>>> -static struct genl_multicast_group thermal_event_mcgrp = {
>>> - .name = THERMAL_GENL_MCAST_GROUP_NAME,
>>> -};
>>> -
>>> -int thermal_generate_netlink_event(struct thermal_zone_device *tz,
>>> - enum events event)
>>> -{
>>> - struct sk_buff *skb;
>>> - struct nlattr *attr;
>>> - struct thermal_genl_event *thermal_event;
>>> - void *msg_header;
>>> - int size;
>>> - int result;
>>> - static unsigned int thermal_event_seqnum;
>>> -
>>> - if (!tz)
>>> - return -EINVAL;
>>> -
>>> - /* allocate memory */
>>> - size = nla_total_size(sizeof(struct thermal_genl_event)) +
>>> - nla_total_size(0);
>>> -
>>> - skb = genlmsg_new(size, GFP_ATOMIC);
>>> - if (!skb)
>>> - return -ENOMEM;
>>> -
>>> - /* add the genetlink message header */
>>> - msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++,
>>> - &thermal_event_genl_family, 0,
>>> - THERMAL_GENL_CMD_EVENT);
>>> - if (!msg_header) {
>>> - nlmsg_free(skb);
>>> - return -ENOMEM;
>>> - }
>>> -
>>> - /* fill the data */
>>> - attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT,
>>> - sizeof(struct thermal_genl_event));
>>> -
>>> - if (!attr) {
>>> - nlmsg_free(skb);
>>> - return -EINVAL;
>>> - }
>>> -
>>> - thermal_event = nla_data(attr);
>>> - if (!thermal_event) {
>>> - nlmsg_free(skb);
>>> - return -EINVAL;
>>> - }
>>> -
>>> - memset(thermal_event, 0, sizeof(struct thermal_genl_event));
>>> -
>>> - thermal_event->orig = tz->id;
>>> - thermal_event->event = event;
>>> -
>>> - /* send multicast genetlink message */
>>> - result = genlmsg_end(skb, msg_header);
>>> - if (result < 0) {
>>> - nlmsg_free(skb);
>>> - return result;
>>> - }
>>> -
>>> - result = genlmsg_multicast(skb, 0, thermal_event_mcgrp.id, GFP_ATOMIC);
>>> - if (result)
>>> - dev_err(&tz->device, "Failed to send netlink event:%d", result);
>>> -
>>> - return result;
>>> -}
>>> -EXPORT_SYMBOL(thermal_generate_netlink_event);
>>> -
>>> -static int genetlink_init(void)
>>> -{
>>> - int result;
>>> -
>>> - result = genl_register_family(&thermal_event_genl_family);
>>> - if (result)
>>> - return result;
>>> -
>>> - result = genl_register_mc_group(&thermal_event_genl_family,
>>> - &thermal_event_mcgrp);
>>> - if (result)
>>> - genl_unregister_family(&thermal_event_genl_family);
>>> - return result;
>>> -}
>>> -
>>> -static void genetlink_exit(void)
>>> -{
>>> - genl_unregister_family(&thermal_event_genl_family);
>>> -}
>>> -#else /* !CONFIG_NET */
>>> -static inline int genetlink_init(void) { return 0; }
>>> -static inline void genetlink_exit(void) {}
>>> -#endif /* !CONFIG_NET */
>>> -
>>> -static int __init thermal_init(void)
>>> -{
>>> - int result = 0;
>>> -
>>> - result = class_register(&thermal_class);
>>> - if (result) {
>>> - idr_destroy(&thermal_tz_idr);
>>> - idr_destroy(&thermal_cdev_idr);
>>> - mutex_destroy(&thermal_idr_lock);
>>> - mutex_destroy(&thermal_list_lock);
>>> - return result;
>>> - }
>>> - result = genetlink_init();
>>> - return result;
>>> -}
>>> -
>>> -static void __exit thermal_exit(void)
>>> -{
>>> - class_unregister(&thermal_class);
>>> - idr_destroy(&thermal_tz_idr);
>>> - idr_destroy(&thermal_cdev_idr);
>>> - mutex_destroy(&thermal_idr_lock);
>>> - mutex_destroy(&thermal_list_lock);
>>> - genetlink_exit();
>>> -}
>>> -
>>> -fs_initcall(thermal_init);
>>> -module_exit(thermal_exit);
>>>
>>
>
>
>
>
--
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