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Message-ID: <1364438454.3475.2.camel@rzhang1-mobl4>
Date: Thu, 28 Mar 2013 10:40:54 +0800
From: Zhang Rui <rui.zhang@...el.com>
To: Eduardo Valentin <eduardo.valentin@...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
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-$(CONFIG_THERMAL) += thermal_sys.o
>
> I know this is for fixing the annoying bug with fan max speed. But while
> still here, do you think 'thermal_sys' is a good name for thermal
> framework driver? Maybe just 'thermal' would suffice?
>
as I said, there is already a thermal driver, aka,
driver/acpi/thermal.c.
thanks,
rui
> > +thermal_sys-y += thermal_core.o
> >
> > # governors
> > obj-$(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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