forked from Minki/linux
cpufreq: qoriq: Register cooling device based on device tree
Register the qoriq cpufreq driver as a cooling device, based on the thermal device tree framework. When temperature crosses the passive trip point cpufreq is used to throttle CPUs. Signed-off-by: Jia Hongtao <hongtao.jia@freescale.com> Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
parent
790d849bf8
commit
8ae1702a0d
@ -12,6 +12,7 @@
|
||||
|
||||
#include <linux/clk.h>
|
||||
#include <linux/cpufreq.h>
|
||||
#include <linux/cpu_cooling.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/kernel.h>
|
||||
@ -33,6 +34,7 @@
|
||||
struct cpu_data {
|
||||
struct clk **pclk;
|
||||
struct cpufreq_frequency_table *table;
|
||||
struct thermal_cooling_device *cdev;
|
||||
};
|
||||
|
||||
/**
|
||||
@ -321,6 +323,27 @@ static int qoriq_cpufreq_target(struct cpufreq_policy *policy,
|
||||
return clk_set_parent(policy->clk, parent);
|
||||
}
|
||||
|
||||
|
||||
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->related_cpus);
|
||||
|
||||
if (IS_ERR(cpud->cdev)) {
|
||||
pr_err("Failed to register cooling device cpu%d: %ld\n",
|
||||
policy->cpu, PTR_ERR(cpud->cdev));
|
||||
|
||||
cpud->cdev = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
of_node_put(np);
|
||||
}
|
||||
|
||||
static struct cpufreq_driver qoriq_cpufreq_driver = {
|
||||
.name = "qoriq_cpufreq",
|
||||
.flags = CPUFREQ_CONST_LOOPS,
|
||||
@ -329,6 +352,7 @@ static struct cpufreq_driver qoriq_cpufreq_driver = {
|
||||
.verify = cpufreq_generic_frequency_table_verify,
|
||||
.target_index = qoriq_cpufreq_target,
|
||||
.get = cpufreq_generic_get,
|
||||
.ready = qoriq_cpufreq_ready,
|
||||
.attr = cpufreq_generic_attr,
|
||||
};
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user