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Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 

Pull thermal management fixes from Zhang Rui:

 - Power allocator governor changes to allow binding on thermal zones
   with missing power estimates information.  From Javi Merino.

 - Add compile test flags on thermal drivers that allow it without
   producing compilation errors.  From Eduardo Valentin.

 - Fixes around memory allocation on cpu_cooling.  From Javi Merino.

 - Fix on db8500 cpufreq code to allow autoload.  From Luis de
   Bethencourt.

 - Maintainer entries for cpu cooling device

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
  thermal: power_allocator: exit early if there are no cooling devices
  thermal: power_allocator: don't require tzp to be present for the thermal zone
  thermal: power_allocator: relax the requirement of two passive trip points
  thermal: power_allocator: relax the requirement of a sustainable_power in tzp
  thermal: Add a function to get the minimum power
  thermal: cpu_cooling: free power table on error or when unregistering
  thermal: cpu_cooling: don't call kcalloc() under rcu_read_lock
  thermal: db8500_cpufreq_cooling: Fix module autoload for OF platform driver
  thermal: cpu_cooling: Add MAINTAINERS entry
  thermal: ti-soc: Kconfig fix to avoid menu showing wrongly
  thermal: ti-soc: allow compile test
  thermal: qcom_spmi: allow compile test
  thermal: exynos: allow compile test
  thermal: armada: allow compile test
  thermal: dove: allow compile test
  thermal: kirkwood: allow compile test
  thermal: rockchip: allow compile test
  thermal: spear: allow compile test
  thermal: hisi: allow compile test
  thermal: Fix thermal_zone_of_sensor_register to match documentation
This commit is contained in:
Linus Torvalds 2015-09-24 20:14:26 -07:00
parent 4401555a98 97584d1838
commit ced255c0c5
9 changed files with 269 additions and 100 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/thermal/power_allocator.txt
View File

@ -4,7 +4,7 @@ Power allocator governor tunables
Trip points
-----------
The governor requires the following two passive trip points:
The governor works optimally with the following two passive trip points:
1. "switch on" trip point: temperature above which the governor
control loop starts operating. This is the first passive trip

10
MAINTAINERS
View File

@ -10338,6 +10338,16 @@ F: include/uapi/linux/thermal.h
F: include/linux/cpu_cooling.h
F: Documentation/devicetree/bindings/thermal/
THERMAL/CPU_COOLING
M: Amit Daniel Kachhap <amit.kachhap@gmail.com>
M: Viresh Kumar <viresh.kumar@linaro.org>
M: Javi Merino <javi.merino@arm.com>
L: linux-pm@vger.kernel.org
S: Supported
F: Documentation/thermal/cpu-cooling-api.txt
F: drivers/thermal/cpu_cooling.c
F: include/linux/cpu_cooling.h
THINGM BLINK(1) USB RGB LED DRIVER
M: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
S: Maintained

17
drivers/thermal/Kconfig
View File

@ -163,7 +163,7 @@ config THERMAL_EMULATION
config HISI_THERMAL
tristate "Hisilicon thermal driver"
depends on ARCH_HISI && CPU_THERMAL && OF
depends on (ARCH_HISI && CPU_THERMAL && OF) || COMPILE_TEST
help
Enable this to plug hisilicon's thermal sensor driver into the Linux
thermal framework. cpufreq is used as the cooling device to throttle
@ -182,7 +182,7 @@ config IMX_THERMAL
config SPEAR_THERMAL
bool "SPEAr thermal sensor driver"
depends on PLAT_SPEAR
depends on PLAT_SPEAR || COMPILE_TEST
depends on OF
help
Enable this to plug the SPEAr thermal sensor driver into the Linux
@ -190,7 +190,7 @@ config SPEAR_THERMAL
config ROCKCHIP_THERMAL
tristate "Rockchip thermal driver"
depends on ARCH_ROCKCHIP
depends on ARCH_ROCKCHIP || COMPILE_TEST
depends on RESET_CONTROLLER
help
Rockchip thermal driver provides support for Temperature sensor
@ -208,7 +208,7 @@ config RCAR_THERMAL
config KIRKWOOD_THERMAL
tristate "Temperature sensor on Marvell Kirkwood SoCs"
depends on MACH_KIRKWOOD
depends on MACH_KIRKWOOD || COMPILE_TEST
depends on OF
help
Support for the Kirkwood thermal sensor driver into the Linux thermal
@ -216,7 +216,7 @@ config KIRKWOOD_THERMAL
config DOVE_THERMAL
tristate "Temperature sensor on Marvell Dove SoCs"
depends on ARCH_DOVE || MACH_DOVE
depends on ARCH_DOVE || MACH_DOVE || COMPILE_TEST
depends on OF
help
Support for the Dove thermal sensor driver in the Linux thermal
@ -234,7 +234,7 @@ config DB8500_THERMAL
config ARMADA_THERMAL
tristate "Armada 370/XP thermal management"
depends on ARCH_MVEBU
depends on ARCH_MVEBU || COMPILE_TEST
depends on OF
help
Enable this option if you want to have support for thermal management
@ -349,11 +349,12 @@ config INTEL_PCH_THERMAL
programmable trip points and other information.
menu "Texas Instruments thermal drivers"
depends on ARCH_HAS_BANDGAP || COMPILE_TEST
source "drivers/thermal/ti-soc-thermal/Kconfig"
endmenu
menu "Samsung thermal drivers"
depends on ARCH_EXYNOS
depends on ARCH_EXYNOS || COMPILE_TEST
source "drivers/thermal/samsung/Kconfig"
endmenu
@ -364,7 +365,7 @@ endmenu
config QCOM_SPMI_TEMP_ALARM
tristate "Qualcomm SPMI PMIC Temperature Alarm"
depends on OF && SPMI && IIO
depends on OF && (SPMI || COMPILE_TEST) && IIO
select REGMAP_SPMI
help
This enables a thermal sysfs driver for Qualcomm plug-and-play (QPNP)

52
drivers/thermal/cpu_cooling.c
View File

@ -262,7 +262,9 @@ static int cpufreq_thermal_notifier(struct notifier_block *nb,
* efficiently. Power is stored in mW, frequency in KHz. The
* resulting table is in ascending order.
*
* Return: 0 on success, -E* on error.
* Return: 0 on success, -EINVAL if there are no OPPs for any CPUs,
* -ENOMEM if we run out of memory or -EAGAIN if an OPP was
* added/enabled while the function was executing.
*/
static int build_dyn_power_table(struct cpufreq_cooling_device *cpufreq_device,
u32 capacitance)
@ -273,8 +275,6 @@ static int build_dyn_power_table(struct cpufreq_cooling_device *cpufreq_device,
int num_opps = 0, cpu, i, ret = 0;
unsigned long freq;
rcu_read_lock();
for_each_cpu(cpu, &cpufreq_device->allowed_cpus) {
dev = get_cpu_device(cpu);
if (!dev) {
@ -284,24 +284,20 @@ static int build_dyn_power_table(struct cpufreq_cooling_device *cpufreq_device,
}
num_opps = dev_pm_opp_get_opp_count(dev);
if (num_opps > 0) {
if (num_opps > 0)
break;
} else if (num_opps < 0) {
ret = num_opps;
goto unlock;
}
else if (num_opps < 0)
return num_opps;
}
if (num_opps == 0) {
ret = -EINVAL;
goto unlock;
}
if (num_opps == 0)
return -EINVAL;
power_table = kcalloc(num_opps, sizeof(*power_table), GFP_KERNEL);
if (!power_table) {
ret = -ENOMEM;
goto unlock;
}
if (!power_table)
return -ENOMEM;
rcu_read_lock();
for (freq = 0, i = 0;
opp = dev_pm_opp_find_freq_ceil(dev, &freq), !IS_ERR(opp);
@ -309,6 +305,12 @@ static int build_dyn_power_table(struct cpufreq_cooling_device *cpufreq_device,
u32 freq_mhz, voltage_mv;
u64 power;
if (i >= num_opps) {
rcu_read_unlock();
ret = -EAGAIN;
goto free_power_table;
}
freq_mhz = freq / 1000000;
voltage_mv = dev_pm_opp_get_voltage(opp) / 1000;
@ -326,17 +328,22 @@ static int build_dyn_power_table(struct cpufreq_cooling_device *cpufreq_device,
power_table[i].power = power;
}
if (i == 0) {
rcu_read_unlock();
if (i != num_opps) {
ret = PTR_ERR(opp);
goto unlock;
goto free_power_table;
}
cpufreq_device->cpu_dev = dev;
cpufreq_device->dyn_power_table = power_table;
cpufreq_device->dyn_power_table_entries = i;
unlock:
rcu_read_unlock();
return 0;
free_power_table:
kfree(power_table);
return ret;
}
@ -847,7 +854,7 @@ __cpufreq_cooling_register(struct device_node *np,
ret = get_idr(&cpufreq_idr, &cpufreq_dev->id);
if (ret) {
cool_dev = ERR_PTR(ret);
goto free_table;
goto free_power_table;
}
snprintf(dev_name, sizeof(dev_name), "thermal-cpufreq-%d",
@ -889,6 +896,8 @@ __cpufreq_cooling_register(struct device_node *np,
remove_idr:
release_idr(&cpufreq_idr, cpufreq_dev->id);
free_power_table:
kfree(cpufreq_dev->dyn_power_table);
free_table:
kfree(cpufreq_dev->freq_table);
free_time_in_idle_timestamp:
@ -1039,6 +1048,7 @@ void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
thermal_cooling_device_unregister(cpufreq_dev->cool_dev);
release_idr(&cpufreq_idr, cpufreq_dev->id);
kfree(cpufreq_dev->dyn_power_table);
kfree(cpufreq_dev->time_in_idle_timestamp);
kfree(cpufreq_dev->time_in_idle);
kfree(cpufreq_dev->freq_table);

1
drivers/thermal/db8500_cpufreq_cooling.c
View File

@ -72,6 +72,7 @@ static const struct of_device_id db8500_cpufreq_cooling_match[] = {
{ .compatible = "stericsson,db8500-cpufreq-cooling" },
{},
};
MODULE_DEVICE_TABLE(of, db8500_cpufreq_cooling_match);
#endif
static struct platform_driver db8500_cpufreq_cooling_driver = {

243
drivers/thermal/power_allocator.c
View File

@ -24,6 +24,8 @@
#include "thermal_core.h"
#define INVALID_TRIP -1
#define FRAC_BITS 10
#define int_to_frac(x) ((x) << FRAC_BITS)
#define frac_to_int(x) ((x) >> FRAC_BITS)
@ -56,22 +58,109 @@ static inline s64 div_frac(s64 x, s64 y)
/**
* struct power_allocator_params - parameters for the power allocator governor
* @allocated_tzp: whether we have allocated tzp for this thermal zone and
* it needs to be freed on unbind
* @err_integral: accumulated error in the PID controller.
* @prev_err: error in the previous iteration of the PID controller.
* Used to calculate the derivative term.
* @trip_switch_on: first passive trip point of the thermal zone. The
* governor switches on when this trip point is crossed.
* If the thermal zone only has one passive trip point,
* @trip_switch_on should be INVALID_TRIP.
* @trip_max_desired_temperature: last passive trip point of the thermal
* zone. The temperature we are
* controlling for.
*/
struct power_allocator_params {
bool allocated_tzp;
s64 err_integral;
s32 prev_err;
int trip_switch_on;
int trip_max_desired_temperature;
};
/**
* estimate_sustainable_power() - Estimate the sustainable power of a thermal zone
* @tz: thermal zone we are operating in
*
* For thermal zones that don't provide a sustainable_power in their
* thermal_zone_params, estimate one. Calculate it using the minimum
* power of all the cooling devices as that gives a valid value that
* can give some degree of functionality. For optimal performance of
* this governor, provide a sustainable_power in the thermal zone's
* thermal_zone_params.
*/
static u32 estimate_sustainable_power(struct thermal_zone_device *tz)
{
u32 sustainable_power = 0;
struct thermal_instance *instance;
struct power_allocator_params *params = tz->governor_data;
list_for_each_entry(instance, &tz->thermal_instances, tz_node) {
struct thermal_cooling_device *cdev = instance->cdev;
u32 min_power;
if (instance->trip != params->trip_max_desired_temperature)
continue;
if (power_actor_get_min_power(cdev, tz, &min_power))
continue;
sustainable_power += min_power;
}
return sustainable_power;
}
/**
* estimate_pid_constants() - Estimate the constants for the PID controller
* @tz: thermal zone for which to estimate the constants
* @sustainable_power: sustainable power for the thermal zone
* @trip_switch_on: trip point number for the switch on temperature
* @control_temp: target temperature for the power allocator governor
* @force: whether to force the update of the constants
*
* This function is used to update the estimation of the PID
* controller constants in struct thermal_zone_parameters.
* Sustainable power is provided in case it was estimated. The
* estimated sustainable_power should not be stored in the
* thermal_zone_parameters so it has to be passed explicitly to this
* function.
*
* If @force is not set, the values in the thermal zone's parameters
* are preserved if they are not zero. If @force is set, the values
* in thermal zone's parameters are overwritten.
*/
static void estimate_pid_constants(struct thermal_zone_device *tz,
u32 sustainable_power, int trip_switch_on,
int control_temp, bool force)
{
int ret;
int switch_on_temp;
u32 temperature_threshold;
ret = tz->ops->get_trip_temp(tz, trip_switch_on, &switch_on_temp);
if (ret)
switch_on_temp = 0;
temperature_threshold = control_temp - switch_on_temp;
if (!tz->tzp->k_po || force)
tz->tzp->k_po = int_to_frac(sustainable_power) /
temperature_threshold;
if (!tz->tzp->k_pu || force)
tz->tzp->k_pu = int_to_frac(2 * sustainable_power) /
temperature_threshold;
if (!tz->tzp->k_i || force)
tz->tzp->k_i = int_to_frac(10) / 1000;
/*
* The default for k_d and integral_cutoff is 0, so we can
* leave them as they are.
*/
}
/**
* pid_controller() - PID controller
* @tz: thermal zone we are operating in
@ -98,10 +187,20 @@ static u32 pid_controller(struct thermal_zone_device *tz,
{
s64 p, i, d, power_range;
s32 err, max_power_frac;
u32 sustainable_power;
struct power_allocator_params *params = tz->governor_data;
max_power_frac = int_to_frac(max_allocatable_power);
if (tz->tzp->sustainable_power) {
sustainable_power = tz->tzp->sustainable_power;
} else {
sustainable_power = estimate_sustainable_power(tz);
estimate_pid_constants(tz, sustainable_power,
params->trip_switch_on, control_temp,
true);
}
err = control_temp - current_temp;
err = int_to_frac(err);
@ -139,7 +238,7 @@ static u32 pid_controller(struct thermal_zone_device *tz,
power_range = p + i + d;
/* feed-forward the known sustainable dissipatable power */
power_range = tz->tzp->sustainable_power + frac_to_int(power_range);
power_range = sustainable_power + frac_to_int(power_range);
power_range = clamp(power_range, (s64)0, (s64)max_allocatable_power);
@ -247,6 +346,11 @@ static int allocate_power(struct thermal_zone_device *tz,
}
}
if (!num_actors) {
ret = -ENODEV;
goto unlock;
}
/*
* We need to allocate five arrays of the same size:
* req_power, max_power, granted_power, extra_actor_power and
@ -340,43 +444,66 @@ unlock:
return ret;
}
static int get_governor_trips(struct thermal_zone_device *tz,
struct power_allocator_params *params)
/**
* get_governor_trips() - get the number of the two trip points that are key for this governor
* @tz: thermal zone to operate on
* @params: pointer to private data for this governor
*
* The power allocator governor works optimally with two trips points:
* a "switch on" trip point and a "maximum desired temperature". These
* are defined as the first and last passive trip points.
*
* If there is only one trip point, then that's considered to be the
* "maximum desired temperature" trip point and the governor is always
* on. If there are no passive or active trip points, then the
* governor won't do anything. In fact, its throttle function
* won't be called at all.
*/
static void get_governor_trips(struct thermal_zone_device *tz,
struct power_allocator_params *params)
{
int i, ret, last_passive;
int i, last_active, last_passive;
bool found_first_passive;
found_first_passive = false;
last_passive = -1;
ret = -EINVAL;
last_active = INVALID_TRIP;
last_passive = INVALID_TRIP;
for (i = 0; i < tz->trips; i++) {
enum thermal_trip_type type;
int ret;
ret = tz->ops->get_trip_type(tz, i, &type);
if (ret)
return ret;
if (ret) {
dev_warn(&tz->device,
"Failed to get trip point %d type: %d\n", i,
ret);
continue;
}
if (!found_first_passive) {
if (type == THERMAL_TRIP_PASSIVE) {
if (type == THERMAL_TRIP_PASSIVE) {
if (!found_first_passive) {
params->trip_switch_on = i;
found_first_passive = true;
} else {
last_passive = i;
}
} else if (type == THERMAL_TRIP_PASSIVE) {
last_passive = i;
} else if (type == THERMAL_TRIP_ACTIVE) {
last_active = i;
} else {
break;
}
}
if (last_passive != -1) {
if (last_passive != INVALID_TRIP) {
params->trip_max_desired_temperature = last_passive;
ret = 0;
} else if (found_first_passive) {
params->trip_max_desired_temperature = params->trip_switch_on;
params->trip_switch_on = INVALID_TRIP;
} else {
ret = -EINVAL;
params->trip_switch_on = INVALID_TRIP;
params->trip_max_desired_temperature = last_active;
}
return ret;
}
static void reset_pid_controller(struct power_allocator_params *params)
@ -405,60 +532,45 @@ static void allow_maximum_power(struct thermal_zone_device *tz)
* power_allocator_bind() - bind the power_allocator governor to a thermal zone
* @tz: thermal zone to bind it to
*
* Check that the thermal zone is valid for this governor, that is, it
* has two thermal trips. If so, initialize the PID controller
* parameters and bind it to the thermal zone.
* Initialize the PID controller parameters and bind it to the thermal
* zone.
*
* Return: 0 on success, -EINVAL if the trips were invalid or -ENOMEM
* if we ran out of memory.
* Return: 0 on success, or -ENOMEM if we ran out of memory.
*/
static int power_allocator_bind(struct thermal_zone_device *tz)
{
int ret;
struct power_allocator_params *params;
int switch_on_temp, control_temp;
u32 temperature_threshold;
if (!tz->tzp || !tz->tzp->sustainable_power) {
dev_err(&tz->device,
"power_allocator: missing sustainable_power\n");
return -EINVAL;
}
int control_temp;
params = kzalloc(sizeof(*params), GFP_KERNEL);
if (!params)
return -ENOMEM;
ret = get_governor_trips(tz, params);
if (ret) {
dev_err(&tz->device,
"thermal zone %s has wrong trip setup for power allocator\n",
tz->type);
goto free;
if (!tz->tzp) {
tz->tzp = kzalloc(sizeof(*tz->tzp), GFP_KERNEL);
if (!tz->tzp) {
ret = -ENOMEM;
goto free_params;
}
params->allocated_tzp = true;
}
ret = tz->ops->get_trip_temp(tz, params->trip_switch_on,
&switch_on_temp);
if (ret)
goto free;
if (!tz->tzp->sustainable_power)
dev_warn(&tz->device, "power_allocator: sustainable_power will be estimated\n");
ret = tz->ops->get_trip_temp(tz, params->trip_max_desired_temperature,
&control_temp);
if (ret)
goto free;
get_governor_trips(tz, params);
temperature_threshold = control_temp - switch_on_temp;
tz->tzp->k_po = tz->tzp->k_po ?:
int_to_frac(tz->tzp->sustainable_power) / temperature_threshold;
tz->tzp->k_pu = tz->tzp->k_pu ?:
int_to_frac(2 * tz->tzp->sustainable_power) /
temperature_threshold;
tz->tzp->k_i = tz->tzp->k_i ?: int_to_frac(10) / 1000;
/*
* The default for k_d and integral_cutoff is 0, so we can
* leave them as they are.
*/
if (tz->trips > 0) {
ret = tz->ops->get_trip_temp(tz,
params->trip_max_desired_temperature,
&control_temp);
if (!ret)
estimate_pid_constants(tz, tz->tzp->sustainable_power,
params->trip_switch_on,
control_temp, false);
}
reset_pid_controller(params);
@ -466,14 +578,23 @@ static int power_allocator_bind(struct thermal_zone_device *tz)
return 0;
free:
free_params:
kfree(params);
return ret;
}
static void power_allocator_unbind(struct thermal_zone_device *tz)
{
struct power_allocator_params *params = tz->governor_data;
dev_dbg(&tz->device, "Unbinding from thermal zone %d\n", tz->id);
if (params->allocated_tzp) {
kfree(tz->tzp);
tz->tzp = NULL;
}
kfree(tz->governor_data);
tz->governor_data = NULL;
}
@ -499,13 +620,7 @@ static int power_allocator_throttle(struct thermal_zone_device *tz, int trip)
ret = tz->ops->get_trip_temp(tz, params->trip_switch_on,
&switch_on_temp);
if (ret) {
dev_warn(&tz->device,
"Failed to get switch on temperature: %d\n", ret);
return ret;
}
if (current_temp < switch_on_temp) {
if (!ret && (current_temp < switch_on_temp)) {
tz->passive = 0;
reset_pid_controller(params);
allow_maximum_power(tz);

28
drivers/thermal/thermal_core.c
View File

@ -1012,6 +1012,34 @@ int power_actor_get_max_power(struct thermal_cooling_device *cdev,
return cdev->ops->state2power(cdev, tz, 0, max_power);
}
/**
* power_actor_get_min_power() - get the mainimum power that a cdev can consume
* @cdev: pointer to &thermal_cooling_device
* @tz: a valid thermal zone device pointer
* @min_power: pointer in which to store the minimum power
*
* Calculate the minimum power consumption in milliwatts that the
* cooling device can currently consume and store it in @min_power.
*
* Return: 0 on success, -EINVAL if @cdev doesn't support the
* power_actor API or -E* on other error.
*/
int power_actor_get_min_power(struct thermal_cooling_device *cdev,
struct thermal_zone_device *tz, u32 *min_power)
{
unsigned long max_state;
int ret;
if (!cdev_is_power_actor(cdev))
return -EINVAL;
ret = cdev->ops->get_max_state(cdev, &max_state);
if (ret)
return ret;
return cdev->ops->state2power(cdev, tz, max_state, min_power);
}
/**
* power_actor_set_power() - limit the maximum power that a cooling device can consume
* @cdev: pointer to &thermal_cooling_device

8
drivers/thermal/ti-soc-thermal/Kconfig
View File

@ -1,7 +1,5 @@
config TI_SOC_THERMAL
tristate "Texas Instruments SoCs temperature sensor driver"
depends on THERMAL
depends on ARCH_HAS_BANDGAP
help
If you say yes here you get support for the Texas Instruments
OMAP4460+ on die bandgap temperature sensor support. The register
@ -24,7 +22,7 @@ config TI_THERMAL
config OMAP4_THERMAL
bool "Texas Instruments OMAP4 thermal support"
depends on TI_SOC_THERMAL
depends on ARCH_OMAP4
depends on ARCH_OMAP4 || COMPILE_TEST
help
If you say yes here you get thermal support for the Texas Instruments
OMAP4 SoC family. The current chip supported are:
@ -38,7 +36,7 @@ config OMAP4_THERMAL
config OMAP5_THERMAL
bool "Texas Instruments OMAP5 thermal support"
depends on TI_SOC_THERMAL
depends on SOC_OMAP5
depends on SOC_OMAP5 || COMPILE_TEST
help
If you say yes here you get thermal support for the Texas Instruments
OMAP5 SoC family. The current chip supported are:
@ -50,7 +48,7 @@ config OMAP5_THERMAL
config DRA752_THERMAL
bool "Texas Instruments DRA752 thermal support"
depends on TI_SOC_THERMAL
depends on SOC_DRA7XX
depends on SOC_DRA7XX || COMPILE_TEST
help
If you say yes here you get thermal support for the Texas Instruments
DRA752 SoC family. The current chip supported are:

8
include/linux/thermal.h
View File

@ -360,7 +360,7 @@ static inline struct thermal_zone_device *
thermal_zone_of_sensor_register(struct device *dev, int id, void *data,
const struct thermal_zone_of_device_ops *ops)
{
return NULL;
return ERR_PTR(-ENODEV);
}
static inline
@ -380,6 +380,8 @@ static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev)
int power_actor_get_max_power(struct thermal_cooling_device *,
struct thermal_zone_device *tz, u32 *max_power);
int power_actor_get_min_power(struct thermal_cooling_device *,
struct thermal_zone_device *tz, u32 *min_power);
int power_actor_set_power(struct thermal_cooling_device *,
struct thermal_instance *, u32);
struct thermal_zone_device *thermal_zone_device_register(const char *, int, int,
@ -415,6 +417,10 @@ static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev)
static inline int power_actor_get_max_power(struct thermal_cooling_device *cdev,
struct thermal_zone_device *tz, u32 *max_power)
{ return 0; }
static inline int power_actor_get_min_power(struct thermal_cooling_device *cdev,
struct thermal_zone_device *tz,
u32 *min_power)
{ return -ENODEV; }
static inline int power_actor_set_power(struct thermal_cooling_device *cdev,
struct thermal_instance *tz, u32 power)
{ return 0; }