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Merge branch 'pm-cpufreq-thermal' into pm-cpufreq 

* pm-cpufreq-thermal:
  cpu_cooling: Remove static-power related documentation
  cpu_cooling: Drop static-power related stuff
  cpu_cooling: Keep only one of_cpufreq*cooling_register() helper
  cpu_cooling: Remove unused cpufreq_power_cooling_register()
  cpu_cooling: Make of_cpufreq_power_cooling_register() parse DT
hifive-unleashed-5.1
Rafael J. Wysocki 2018-01-18 02:52:42 +01:00
parent 343a8d17fa ac89c400eb
commit f06970f4b0
8 changed files with 67 additions and 422 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

115
Documentation/thermal/cpu-cooling-api.txt
View File

@ -26,39 +26,16 @@ the user. The registration APIs returns the cooling device pointer.
clip_cpus: cpumask of cpus where the frequency constraints will happen.
1.1.2 struct thermal_cooling_device *of_cpufreq_cooling_register(
struct device_node *np, const struct cpumask *clip_cpus)
struct cpufreq_policy *policy)
This interface function registers the cpufreq cooling device with
the name "thermal-cpufreq-%x" linking it with a device tree node, in
order to bind it via the thermal DT code. This api can support multiple
instances of cpufreq cooling devices.
np: pointer to the cooling device device tree node
clip_cpus: cpumask of cpus where the frequency constraints will happen.
policy: CPUFreq policy.
1.1.3 struct thermal_cooling_device *cpufreq_power_cooling_register(
const struct cpumask *clip_cpus, u32 capacitance,
get_static_t plat_static_func)
Similar to cpufreq_cooling_register, this function registers a cpufreq
cooling device. Using this function, the cooling device will
implement the power extensions by using a simple cpu power model. The
cpus must have registered their OPPs using the OPP library.
The additional parameters are needed for the power model (See 2. Power
models). "capacitance" is the dynamic power coefficient (See 2.1
Dynamic power). "plat_static_func" is a function to calculate the
static power consumed by these cpus (See 2.2 Static power).
1.1.4 struct thermal_cooling_device *of_cpufreq_power_cooling_register(
struct device_node *np, const struct cpumask *clip_cpus, u32 capacitance,
get_static_t plat_static_func)
Similar to cpufreq_power_cooling_register, this function register a
cpufreq cooling device with power extensions using the device tree
information supplied by the np parameter.
1.1.5 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
1.1.3 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
This interface function unregisters the "thermal-cpufreq-%x" cooling device.
@ -67,20 +44,14 @@ information supplied by the np parameter.
2. Power models
The power API registration functions provide a simple power model for
CPUs. The current power is calculated as dynamic + (optionally)
static power. This power model requires that the operating-points of
CPUs. The current power is calculated as dynamic power (static power isn't
supported currently). This power model requires that the operating-points of
the CPUs are registered using the kernel's opp library and the
`cpufreq_frequency_table` is assigned to the `struct device` of the
cpu. If you are using CONFIG_CPUFREQ_DT then the
`cpufreq_frequency_table` should already be assigned to the cpu
device.
The `plat_static_func` parameter of `cpufreq_power_cooling_register()`
and `of_cpufreq_power_cooling_register()` is optional. If you don't
provide it, only dynamic power will be considered.
2.1 Dynamic power
The dynamic power consumption of a processor depends on many factors.
For a given processor implementation the primary factors are:
@ -119,79 +90,3 @@ mW/MHz/uVolt^2. Typical values for mobile CPUs might lie in range
from 100 to 500. For reference, the approximate values for the SoC in
ARM's Juno Development Platform are 530 for the Cortex-A57 cluster and
140 for the Cortex-A53 cluster.
2.2 Static power
Static leakage power consumption depends on a number of factors. For a
given circuit implementation the primary factors are:
- Time the circuit spends in each 'power state'
- Temperature
- Operating voltage
- Process grade
The time the circuit spends in each 'power state' for a given
evaluation period at first order means OFF or ON. However,
'retention' states can also be supported that reduce power during
inactive periods without loss of context.
Note: The visibility of state entries to the OS can vary, according to
platform specifics, and this can then impact the accuracy of a model
based on OS state information alone. It might be possible in some
cases to extract more accurate information from system resources.
The temperature, operating voltage and process 'grade' (slow to fast)
of the circuit are all significant factors in static leakage power
consumption. All of these have complex relationships to static power.
Circuit implementation specific factors include the chosen silicon
process as well as the type, number and size of transistors in both
the logic gates and any RAM elements included.
The static power consumption modelling must take into account the
power managed regions that are implemented. Taking the example of an
ARM processor cluster, the modelling would take into account whether
each CPU can be powered OFF separately or if only a single power
region is implemented for the complete cluster.
In one view, there are others, a static power consumption model can
then start from a set of reference values for each power managed
region (e.g. CPU, Cluster/L2) in each state (e.g. ON, OFF) at an
arbitrary process grade, voltage and temperature point. These values
are then scaled for all of the following: the time in each state, the
process grade, the current temperature and the operating voltage.
However, since both implementation specific and complex relationships
dominate the estimate, the appropriate interface to the model from the
cpu cooling device is to provide a function callback that calculates
the static power in this platform. When registering the cpu cooling
device pass a function pointer that follows the `get_static_t`
prototype:
int plat_get_static(cpumask_t *cpumask, int interval,
unsigned long voltage, u32 &power);
`cpumask` is the cpumask of the cpus involved in the calculation.
`voltage` is the voltage at which they are operating. The function
should calculate the average static power for the last `interval`
milliseconds. It returns 0 on success, -E* on error. If it
succeeds, it should store the static power in `power`. Reading the
temperature of the cpus described by `cpumask` is left for
plat_get_static() to do as the platform knows best which thermal
sensor is closest to the cpu.
If `plat_static_func` is NULL, static power is considered to be
negligible for this platform and only dynamic power is considered.
The platform specific callback can then use any combination of tables
and/or equations to permute the estimated value. Process grade
information is not passed to the model since access to such data, from
on-chip measurement capability or manufacture time data, is platform
specific.
Note: the significance of static power for CPUs in comparison to
dynamic power is highly dependent on implementation. Given the
potential complexity in implementation, the importance and accuracy of
its inclusion when using cpu cooling devices should be assessed on a
case by case basis.

23
drivers/cpufreq/arm_big_little.c
View File

@ -526,34 +526,13 @@ static int bL_cpufreq_exit(struct cpufreq_policy *policy)
static void bL_cpufreq_ready(struct cpufreq_policy *policy)
{
struct device *cpu_dev = get_cpu_device(policy->cpu);
int cur_cluster = cpu_to_cluster(policy->cpu);
struct device_node *np;
/* Do not register a cpu_cooling device if we are in IKS mode */
if (cur_cluster >= MAX_CLUSTERS)
return;
np = of_node_get(cpu_dev->of_node);
if (WARN_ON(!np))
return;
if (of_find_property(np, "#cooling-cells", NULL)) {
u32 power_coefficient = 0;
of_property_read_u32(np, "dynamic-power-coefficient",
&power_coefficient);
cdev[cur_cluster] = of_cpufreq_power_cooling_register(np,
policy, power_coefficient, NULL);
if (IS_ERR(cdev[cur_cluster])) {
dev_err(cpu_dev,
"running cpufreq without cooling device: %ld\n",
PTR_ERR(cdev[cur_cluster]));
cdev[cur_cluster] = NULL;
}
}
of_node_put(np);
cdev[cur_cluster] = of_cpufreq_cooling_register(policy);
}
static struct cpufreq_driver bL_cpufreq_driver = {

27
drivers/cpufreq/cpufreq-dt.c
View File

@ -319,33 +319,8 @@ static int cpufreq_exit(struct cpufreq_policy *policy)
static void cpufreq_ready(struct cpufreq_policy *policy)
{
struct private_data *priv = policy->driver_data;
struct device_node *np = of_node_get(priv->cpu_dev->of_node);
if (WARN_ON(!np))
return;
/*
* For now, just loading the cooling device;
* thermal DT code takes care of matching them.
*/
if (of_find_property(np, "#cooling-cells", NULL)) {
u32 power_coefficient = 0;
of_property_read_u32(np, "dynamic-power-coefficient",
&power_coefficient);
priv->cdev = of_cpufreq_power_cooling_register(np,
policy, power_coefficient, NULL);
if (IS_ERR(priv->cdev)) {
dev_err(priv->cpu_dev,
"running cpufreq without cooling device: %ld\n",
PTR_ERR(priv->cdev));
priv->cdev = NULL;
}
}
of_node_put(np);
priv->cdev = of_cpufreq_cooling_register(policy);
}
static struct cpufreq_driver dt_cpufreq_driver = {

22
drivers/cpufreq/mediatek-cpufreq.c
View File

@ -310,28 +310,8 @@ static int mtk_cpufreq_set_target(struct cpufreq_policy *policy,
static void mtk_cpufreq_ready(struct cpufreq_policy *policy)
{
struct mtk_cpu_dvfs_info *info = policy->driver_data;
struct device_node *np = of_node_get(info->cpu_dev->of_node);
u32 capacitance = 0;
if (WARN_ON(!np))
return;
if (of_find_property(np, "#cooling-cells", NULL)) {
of_property_read_u32(np, DYNAMIC_POWER, &capacitance);
info->cdev = of_cpufreq_power_cooling_register(np,
policy, capacitance, NULL);
if (IS_ERR(info->cdev)) {
dev_err(info->cpu_dev,
"running cpufreq without cooling device: %ld\n",
PTR_ERR(info->cdev));
info->cdev = NULL;
}
}
of_node_put(np);
info->cdev = of_cpufreq_cooling_register(policy);
}
static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)

14
drivers/cpufreq/qoriq-cpufreq.c
View File

@ -275,20 +275,8 @@ static int qoriq_cpufreq_target(struct cpufreq_policy *policy,
static void qoriq_cpufreq_ready(struct cpufreq_policy *policy)
{
struct cpu_data *cpud = policy->driver_data;
struct device_node *np = of_get_cpu_node(policy->cpu, NULL);
if (of_find_property(np, "#cooling-cells", NULL)) {
cpud->cdev = of_cpufreq_cooling_register(np, policy);
if (IS_ERR(cpud->cdev) && PTR_ERR(cpud->cdev) != -ENOSYS) {
pr_err("cpu%d is not running as cooling device: %ld\n",
policy->cpu, PTR_ERR(cpud->cdev));
cpud->cdev = NULL;
}
}
of_node_put(np);
cpud->cdev = of_cpufreq_cooling_register(policy);
}
static struct cpufreq_driver qoriq_cpufreq_driver = {

201
drivers/thermal/cpu_cooling.c
View File

@ -88,7 +88,6 @@ struct time_in_idle {
* @policy: cpufreq policy.
* @node: list_head to link all cpufreq_cooling_device together.
* @idle_time: idle time stats
* @plat_get_static_power: callback to calculate the static power
*
* This structure is required for keeping information of each registered
* cpufreq_cooling_device.
@ -104,7 +103,6 @@ struct cpufreq_cooling_device {
struct cpufreq_policy *policy;
struct list_head node;
struct time_in_idle *idle_time;
get_static_t plat_get_static_power;
};
static DEFINE_IDA(cpufreq_ida);
@ -318,60 +316,6 @@ static u32 get_load(struct cpufreq_cooling_device *cpufreq_cdev, int cpu,
return load;
}
/**
* get_static_power() - calculate the static power consumed by the cpus
* @cpufreq_cdev: struct &cpufreq_cooling_device for this cpu cdev
* @tz: thermal zone device in which we're operating
* @freq: frequency in KHz
* @power: pointer in which to store the calculated static power
*
* Calculate the static power consumed by the cpus described by
* @cpu_actor running at frequency @freq. This function relies on a
* platform specific function that should have been provided when the
* actor was registered. If it wasn't, the static power is assumed to
* be negligible. The calculated static power is stored in @power.
*
* Return: 0 on success, -E* on failure.
*/
static int get_static_power(struct cpufreq_cooling_device *cpufreq_cdev,
struct thermal_zone_device *tz, unsigned long freq,
u32 *power)
{
struct dev_pm_opp *opp;
unsigned long voltage;
struct cpufreq_policy *policy = cpufreq_cdev->policy;
struct cpumask *cpumask = policy->related_cpus;
unsigned long freq_hz = freq * 1000;
struct device *dev;
if (!cpufreq_cdev->plat_get_static_power) {
*power = 0;
return 0;
}
dev = get_cpu_device(policy->cpu);
WARN_ON(!dev);
opp = dev_pm_opp_find_freq_exact(dev, freq_hz, true);
if (IS_ERR(opp)) {
dev_warn_ratelimited(dev, "Failed to find OPP for frequency %lu: %ld\n",
freq_hz, PTR_ERR(opp));
return -EINVAL;
}
voltage = dev_pm_opp_get_voltage(opp);
dev_pm_opp_put(opp);
if (voltage == 0) {
dev_err_ratelimited(dev, "Failed to get voltage for frequency %lu\n",
freq_hz);
return -EINVAL;
}
return cpufreq_cdev->plat_get_static_power(cpumask, tz->passive_delay,
voltage, power);
}
/**
* get_dynamic_power() - calculate the dynamic power
* @cpufreq_cdev: &cpufreq_cooling_device for this cdev
@ -491,8 +435,8 @@ static int cpufreq_get_requested_power(struct thermal_cooling_device *cdev,
u32 *power)
{
unsigned long freq;
int i = 0, cpu, ret;
u32 static_power, dynamic_power, total_load = 0;
int i = 0, cpu;
u32 total_load = 0;
struct cpufreq_cooling_device *cpufreq_cdev = cdev->devdata;
struct cpufreq_policy *policy = cpufreq_cdev->policy;
u32 *load_cpu = NULL;
@ -522,22 +466,15 @@ static int cpufreq_get_requested_power(struct thermal_cooling_device *cdev,
cpufreq_cdev->last_load = total_load;
dynamic_power = get_dynamic_power(cpufreq_cdev, freq);
ret = get_static_power(cpufreq_cdev, tz, freq, &static_power);
if (ret) {
kfree(load_cpu);
return ret;
}
*power = get_dynamic_power(cpufreq_cdev, freq);
if (load_cpu) {
trace_thermal_power_cpu_get_power(policy->related_cpus, freq,
load_cpu, i, dynamic_power,
static_power);
load_cpu, i, *power);
kfree(load_cpu);
}
*power = static_power + dynamic_power;
return 0;
}
@ -561,8 +498,6 @@ static int cpufreq_state2power(struct thermal_cooling_device *cdev,
unsigned long state, u32 *power)
{
unsigned int freq, num_cpus;
u32 static_power, dynamic_power;
int ret;
struct cpufreq_cooling_device *cpufreq_cdev = cdev->devdata;
/* Request state should be less than max_level */
@ -572,13 +507,9 @@ static int cpufreq_state2power(struct thermal_cooling_device *cdev,
num_cpus = cpumask_weight(cpufreq_cdev->policy->cpus);
freq = cpufreq_cdev->freq_table[state].frequency;
dynamic_power = cpu_freq_to_power(cpufreq_cdev, freq) * num_cpus;
ret = get_static_power(cpufreq_cdev, tz, freq, &static_power);
if (ret)
return ret;
*power = cpu_freq_to_power(cpufreq_cdev, freq) * num_cpus;
*power = static_power + dynamic_power;
return ret;
return 0;
}
/**
@ -606,21 +537,14 @@ static int cpufreq_power2state(struct thermal_cooling_device *cdev,
unsigned long *state)
{
unsigned int cur_freq, target_freq;
int ret;
s32 dyn_power;
u32 last_load, normalised_power, static_power;
u32 last_load, normalised_power;
struct cpufreq_cooling_device *cpufreq_cdev = cdev->devdata;
struct cpufreq_policy *policy = cpufreq_cdev->policy;
cur_freq = cpufreq_quick_get(policy->cpu);
ret = get_static_power(cpufreq_cdev, tz, cur_freq, &static_power);
if (ret)
return ret;
dyn_power = power - static_power;
dyn_power = dyn_power > 0 ? dyn_power : 0;
power = power > 0 ? power : 0;
last_load = cpufreq_cdev->last_load ?: 1;
normalised_power = (dyn_power * 100) / last_load;
normalised_power = (power * 100) / last_load;
target_freq = cpu_power_to_freq(cpufreq_cdev, normalised_power);
*state = get_level(cpufreq_cdev, target_freq);
@ -671,8 +595,6 @@ static unsigned int find_next_max(struct cpufreq_frequency_table *table,
* @policy: cpufreq policy
* Normally this should be same as cpufreq policy->related_cpus.
* @capacitance: dynamic power coefficient for these cpus
* @plat_static_func: function to calculate the static power consumed by these
* cpus (optional)
*
* This interface function registers the cpufreq cooling device with the name
* "thermal-cpufreq-%x". This api can support multiple instances of cpufreq
@ -684,8 +606,7 @@ static unsigned int find_next_max(struct cpufreq_frequency_table *table,
*/
static struct thermal_cooling_device *
__cpufreq_cooling_register(struct device_node *np,
struct cpufreq_policy *policy, u32 capacitance,
get_static_t plat_static_func)
struct cpufreq_policy *policy, u32 capacitance)
{
struct thermal_cooling_device *cdev;
struct cpufreq_cooling_device *cpufreq_cdev;
@ -755,8 +676,6 @@ __cpufreq_cooling_register(struct device_node *np,
}
if (capacitance) {
cpufreq_cdev->plat_get_static_power = plat_static_func;
ret = update_freq_table(cpufreq_cdev, capacitance);
if (ret) {
cdev = ERR_PTR(ret);
@ -813,13 +732,12 @@ free_cdev:
struct thermal_cooling_device *
cpufreq_cooling_register(struct cpufreq_policy *policy)
{
return __cpufreq_cooling_register(NULL, policy, 0, NULL);
return __cpufreq_cooling_register(NULL, policy, 0);
}
EXPORT_SYMBOL_GPL(cpufreq_cooling_register);
/**
* of_cpufreq_cooling_register - function to create cpufreq cooling device.
* @np: a valid struct device_node to the cooling device device tree node
* @policy: cpufreq policy
*
* This interface function registers the cpufreq cooling device with the name
@ -827,86 +745,45 @@ EXPORT_SYMBOL_GPL(cpufreq_cooling_register);
* cooling devices. Using this API, the cpufreq cooling device will be
* linked to the device tree node provided.
*
* Return: a valid struct thermal_cooling_device pointer on success,
* on failure, it returns a corresponding ERR_PTR().
*/
struct thermal_cooling_device *
of_cpufreq_cooling_register(struct device_node *np,
struct cpufreq_policy *policy)
{
if (!np)
return ERR_PTR(-EINVAL);
return __cpufreq_cooling_register(np, policy, 0, NULL);
}
EXPORT_SYMBOL_GPL(of_cpufreq_cooling_register);
/**
* cpufreq_power_cooling_register() - create cpufreq cooling device with power extensions
* @policy: cpufreq policy
* @capacitance: dynamic power coefficient for these cpus
* @plat_static_func: function to calculate the static power consumed by these
* cpus (optional)
*
* This interface function registers the cpufreq cooling device with
* the name "thermal-cpufreq-%x". This api can support multiple
* instances of cpufreq cooling devices. Using this function, the
* cooling device will implement the power extensions by using a
* simple cpu power model. The cpus must have registered their OPPs
* using the OPP library.
*
* An optional @plat_static_func may be provided to calculate the
* static power consumed by these cpus. If the platform's static
* power consumption is unknown or negligible, make it NULL.
*
* Return: a valid struct thermal_cooling_device pointer on success,
* on failure, it returns a corresponding ERR_PTR().
*/
struct thermal_cooling_device *
cpufreq_power_cooling_register(struct cpufreq_policy *policy, u32 capacitance,
get_static_t plat_static_func)
{
return __cpufreq_cooling_register(NULL, policy, capacitance,
plat_static_func);
}
EXPORT_SYMBOL(cpufreq_power_cooling_register);
/**
* of_cpufreq_power_cooling_register() - create cpufreq cooling device with power extensions
* @np: a valid struct device_node to the cooling device device tree node
* @policy: cpufreq policy
* @capacitance: dynamic power coefficient for these cpus
* @plat_static_func: function to calculate the static power consumed by these
* cpus (optional)
*
* This interface function registers the cpufreq cooling device with
* the name "thermal-cpufreq-%x". This api can support multiple
* instances of cpufreq cooling devices. Using this API, the cpufreq
* cooling device will be linked to the device tree node provided.
* Using this function, the cooling device will implement the power
* extensions by using a simple cpu power model. The cpus must have
* registered their OPPs using the OPP library.
*
* An optional @plat_static_func may be provided to calculate the
* static power consumed by these cpus. If the platform's static
* power consumption is unknown or negligible, make it NULL.
* It also takes into account, if property present in policy CPU node, the
* static power consumed by the cpu.
*
* Return: a valid struct thermal_cooling_device pointer on success,
* on failure, it returns a corresponding ERR_PTR().
* and NULL on failure.
*/
struct thermal_cooling_device *
of_cpufreq_power_cooling_register(struct device_node *np,
struct cpufreq_policy *policy,
u32 capacitance,
get_static_t plat_static_func)
of_cpufreq_cooling_register(struct cpufreq_policy *policy)
{
if (!np)
return ERR_PTR(-EINVAL);
struct device_node *np = of_get_cpu_node(policy->cpu, NULL);
struct thermal_cooling_device *cdev = NULL;
u32 capacitance = 0;
return __cpufreq_cooling_register(np, policy, capacitance,
plat_static_func);
if (!np) {
pr_err("cpu_cooling: OF node not available for cpu%d\n",
policy->cpu);
return NULL;
}
if (of_find_property(np, "#cooling-cells", NULL)) {
of_property_read_u32(np, "dynamic-power-coefficient",
&capacitance);
cdev = __cpufreq_cooling_register(np, policy, capacitance);
if (IS_ERR(cdev)) {
pr_err("cpu_cooling: cpu%d is not running as cooling device: %ld\n",
policy->cpu, PTR_ERR(cdev));
cdev = NULL;
}
}
of_node_put(np);
return cdev;
}
EXPORT_SYMBOL(of_cpufreq_power_cooling_register);
EXPORT_SYMBOL_GPL(of_cpufreq_cooling_register);
/**
* cpufreq_cooling_unregister - function to remove cpufreq cooling device.

77
include/linux/cpu_cooling.h
View File

@ -30,9 +30,6 @@
struct cpufreq_policy;
typedef int (*get_static_t)(cpumask_t *cpumask, int interval,
unsigned long voltage, u32 *power);
#ifdef CONFIG_CPU_THERMAL
/**
* cpufreq_cooling_register - function to create cpufreq cooling device.
@ -41,43 +38,6 @@ typedef int (*get_static_t)(cpumask_t *cpumask, int interval,
struct thermal_cooling_device *
cpufreq_cooling_register(struct cpufreq_policy *policy);
struct thermal_cooling_device *
cpufreq_power_cooling_register(struct cpufreq_policy *policy,
u32 capacitance, get_static_t plat_static_func);
/**
* of_cpufreq_cooling_register - create cpufreq cooling device based on DT.
* @np: a valid struct device_node to the cooling device device tree node.
* @policy: cpufreq policy.
*/
#ifdef CONFIG_THERMAL_OF
struct thermal_cooling_device *
of_cpufreq_cooling_register(struct device_node *np,
struct cpufreq_policy *policy);
struct thermal_cooling_device *
of_cpufreq_power_cooling_register(struct device_node *np,
struct cpufreq_policy *policy,
u32 capacitance,
get_static_t plat_static_func);
#else
static inline struct thermal_cooling_device *
of_cpufreq_cooling_register(struct device_node *np,
struct cpufreq_policy *policy)
{
return ERR_PTR(-ENOSYS);
}
static inline struct thermal_cooling_device *
of_cpufreq_power_cooling_register(struct device_node *np,
struct cpufreq_policy *policy,
u32 capacitance,
get_static_t plat_static_func)
{
return NULL;
}
#endif
/**
* cpufreq_cooling_unregister - function to remove cpufreq cooling device.
* @cdev: thermal cooling device pointer.
@ -90,28 +50,6 @@ cpufreq_cooling_register(struct cpufreq_policy *policy)
{
return ERR_PTR(-ENOSYS);
}
static inline struct thermal_cooling_device *
cpufreq_power_cooling_register(struct cpufreq_policy *policy,
u32 capacitance, get_static_t plat_static_func)
{
return NULL;
}
static inline struct thermal_cooling_device *
of_cpufreq_cooling_register(struct device_node *np,
struct cpufreq_policy *policy)
{
return ERR_PTR(-ENOSYS);
}
static inline struct thermal_cooling_device *
of_cpufreq_power_cooling_register(struct device_node *np,
struct cpufreq_policy *policy,
u32 capacitance,
get_static_t plat_static_func)
{
return NULL;
}
static inline
void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
@ -120,4 +58,19 @@ void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
}
#endif /* CONFIG_CPU_THERMAL */
#if defined(CONFIG_THERMAL_OF) && defined(CONFIG_CPU_THERMAL)
/**
* of_cpufreq_cooling_register - create cpufreq cooling device based on DT.
* @policy: cpufreq policy.
*/
struct thermal_cooling_device *
of_cpufreq_cooling_register(struct cpufreq_policy *policy);
#else
static inline struct thermal_cooling_device *
of_cpufreq_cooling_register(struct cpufreq_policy *policy)
{
return NULL;
}
#endif /* defined(CONFIG_THERMAL_OF) && defined(CONFIG_CPU_THERMAL) */
#endif /* __CPU_COOLING_H__ */

10
include/trace/events/thermal.h
View File

@ -94,9 +94,9 @@ TRACE_EVENT(thermal_zone_trip,
#ifdef CONFIG_CPU_THERMAL
TRACE_EVENT(thermal_power_cpu_get_power,
TP_PROTO(const struct cpumask *cpus, unsigned long freq, u32 *load,
size_t load_len, u32 dynamic_power, u32 static_power),
size_t load_len, u32 dynamic_power),
TP_ARGS(cpus, freq, load, load_len, dynamic_power, static_power),
TP_ARGS(cpus, freq, load, load_len, dynamic_power),
TP_STRUCT__entry(
__bitmask(cpumask, num_possible_cpus())
@ -104,7 +104,6 @@ TRACE_EVENT(thermal_power_cpu_get_power,
__dynamic_array(u32, load, load_len)
__field(size_t, load_len )
__field(u32, dynamic_power )
__field(u32, static_power )
),
TP_fast_assign(
@ -115,13 +114,12 @@ TRACE_EVENT(thermal_power_cpu_get_power,
load_len * sizeof(*load));
__entry->load_len = load_len;
__entry->dynamic_power = dynamic_power;
__entry->static_power = static_power;
),
TP_printk("cpus=%s freq=%lu load={%s} dynamic_power=%d static_power=%d",
TP_printk("cpus=%s freq=%lu load={%s} dynamic_power=%d",
__get_bitmask(cpumask), __entry->freq,
__print_array(__get_dynamic_array(load), __entry->load_len, 4),
__entry->dynamic_power, __entry->static_power)
__entry->dynamic_power)
);
TRACE_EVENT(thermal_power_cpu_limit,