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Commit 1530b996 authored by Viresh Kumar's avatar Viresh Kumar Committed by Rafael J. Wysocki
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cpufreq: dt: Identify cpu-sharing for platforms without operating-points-v2 



Existing platforms, which do not support operating-points-v2, can
explicitly tell the opp core that some of the CPUs share opp tables,
with help of dev_pm_opp_set_sharing_cpus().

For such platforms, explicitly ask the opp core to provide list of CPUs
sharing the opp table with current cpu device, before falling back to
platform data.

Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 29c5e7b2

drivers/cpufreq/cpufreq-dt.c

+9 −7
Original line number Diff line number Diff line
@@ -147,7 +147,7 @@ static int cpufreq_init(struct cpufreq_policy *policy) 
	struct clk *cpu_clk;

	struct dev_pm_opp *suspend_opp;

	unsigned int transition_latency;

	bool opp_v1 = false;

	bool fallback = false;

	const char *name;

	int ret;
@@ -167,14 +167,16 @@ static int cpufreq_init(struct cpufreq_policy *policy) 
	/* Get OPP-sharing information from "operating-points-v2" bindings */

	ret = dev_pm_opp_of_get_sharing_cpus(cpu_dev, policy->cpus);

	if (ret) {

		if (ret != -ENOENT)

			goto out_put_clk;



		/*

		 * operating-points-v2 not supported, fallback to old method of

		 * finding shared-OPPs for backward compatibility.

		 * finding shared-OPPs for backward compatibility if the

		 * platform hasn't set sharing CPUs.

		 */

		if (ret == -ENOENT)

			opp_v1 = true;

		else

			goto out_put_clk;

		if (dev_pm_opp_get_sharing_cpus(cpu_dev, policy->cpus))

			fallback = true;

	}



	/*
@@ -214,7 +216,7 @@ static int cpufreq_init(struct cpufreq_policy *policy) 
		goto out_free_opp;

	}



	if (opp_v1) {

	if (fallback) {

		struct cpufreq_dt_platform_data *pd = cpufreq_get_driver_data();



		if (!pd || !pd->independent_clocks)