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Commit ac5b7607 authored by Ram Chandrasekar's avatar Ram Chandrasekar Committed by Manaf Meethalavalappu Pallikunhi
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qcom-cpufreq: Register cooling device in ready callback 



Thermal cooling device has to be registered when the policy for a CPU is
ready. Cpufreq will get a callback when a cpufreq policy is ready and
register CPU cooling device as a part of this callback, so that the CPU
can be mitigated immediately if needed.

Ignore cpu cooling device registration when there is platform cooling
device available.

Change-Id: I7cfb8598aa8ead4091a617da3faddf86ff0fe6a8
Signed-off-by: default avatarRam Chandrasekar <rkumbako@codeaurora.org>
Signed-off-by: default avatarManaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>
parent 296c1f72

drivers/cpufreq/qcom-cpufreq.c

+48 −0
Original line number Diff line number Diff line
@@ -27,10 +27,13 @@ 
#include <linux/err.h>

#include <linux/platform_device.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/cpu_cooling.h>

#include <trace/events/power.h>



static DEFINE_MUTEX(l2bw_lock);



static struct thermal_cooling_device *cdev[NR_CPUS];

static struct clk *cpu_clk[NR_CPUS];

static struct clk *l2_clk;

static DEFINE_PER_CPU(struct cpufreq_frequency_table *, freq_table);
@@ -306,6 +309,50 @@ static struct freq_attr *msm_freq_attr[] = { 
	NULL,

};



static void msm_cpufreq_ready(struct cpufreq_policy *policy)

{

	struct device_node *np, *lmh_node;

	unsigned int cpu = 0;



	if (cdev[policy->cpu])

		return;



	np = of_cpu_device_node_get(policy->cpu);

	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)) {

		lmh_node = of_parse_phandle(np, "qcom,lmh-dcvs", 0);

		if (lmh_node) {

			of_node_put(lmh_node);

			goto ready_exit;

		}



		for_each_cpu(cpu, policy->related_cpus) {



			of_node_put(np);

			np = of_cpu_device_node_get(cpu);

			if (WARN_ON(!np))

				return;



			cdev[cpu] = of_cpufreq_cooling_register(np, policy);

			if (IS_ERR(cdev[cpu])) {

				pr_err(

				"running cpufreq for CPU%d without cooling dev: %ld\n",

				cpu, PTR_ERR(cdev[cpu]));

				cdev[cpu] = NULL;

			}

		}

	}



ready_exit:

	of_node_put(np);

}



static struct cpufreq_driver msm_cpufreq_driver = {

	/* lps calculations are handled here. */

	.flags		= CPUFREQ_STICKY | CPUFREQ_CONST_LOOPS |
@@ -317,6 +364,7 @@ static struct cpufreq_driver msm_cpufreq_driver = { 
	.get		= msm_cpufreq_get_freq,

	.name		= "msm",

	.attr		= msm_freq_attr,

	.ready		= msm_cpufreq_ready,

};



static struct cpufreq_frequency_table *cpufreq_parse_dt(struct device *dev,