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Commit 8ae1702a authored by Hongtao Jia's avatar Hongtao Jia Committed by Rafael J. Wysocki
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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: default avatarJia Hongtao <hongtao.jia@freescale.com>
Reviewed-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 790d849b

drivers/cpufreq/qoriq-cpufreq.c

+24 −0
Original line number Original line Diff line number Diff line
@@ -12,6 +12,7 @@ 




#include <linux/clk.h>

#include <linux/clk.h>

#include <linux/cpufreq.h>

#include <linux/cpufreq.h>

#include <linux/cpu_cooling.h>

#include <linux/errno.h>

#include <linux/errno.h>

#include <linux/init.h>

#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/kernel.h>
@@ -33,6 +34,7 @@ 
struct cpu_data {

struct cpu_data {

	struct clk **pclk;

	struct clk **pclk;

	struct cpufreq_frequency_table *table;

	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);

	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 = {

static struct cpufreq_driver qoriq_cpufreq_driver = {

	.name		= "qoriq_cpufreq",

	.name		= "qoriq_cpufreq",

	.flags		= CPUFREQ_CONST_LOOPS,

	.flags		= CPUFREQ_CONST_LOOPS,
@@ -329,6 +352,7 @@ static struct cpufreq_driver qoriq_cpufreq_driver = { 
	.verify		= cpufreq_generic_frequency_table_verify,

	.verify		= cpufreq_generic_frequency_table_verify,

	.target_index	= qoriq_cpufreq_target,

	.target_index	= qoriq_cpufreq_target,

	.get		= cpufreq_generic_get,

	.get		= cpufreq_generic_get,

	.ready		= qoriq_cpufreq_ready,

	.attr		= cpufreq_generic_attr,

	.attr		= cpufreq_generic_attr,

};

};