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Commit fc2cac41 authored by Chander Kashyap's avatar Chander Kashyap Committed by Kukjin Kim
Browse files

ARM: EXYNOS: populate suspend and powered_up callbacks for mcpm 



In order to support cpuidle through mcpm, suspend and powered-up
callbacks are required in mcpm platform code.
Hence populate the same callbacks.

Signed-off-by: default avatarChander Kashyap <chander.kashyap@linaro.org>
Signed-off-by: default avatarChander Kashyap <k.chander@samsung.com>
Reviewed-by: default avatarTomasz Figa <t.figa@samsung.com>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
parent b5a296cd

arch/arm/mach-exynos/mcpm-exynos.c

+36 −0
Original line number Diff line number Diff line
@@ -257,10 +257,46 @@ static int exynos_wait_for_powerdown(unsigned int cpu, unsigned int cluster) 
	return -ETIMEDOUT; /* timeout */

}



static void exynos_powered_up(void)

{

	unsigned int mpidr, cpu, cluster;



	mpidr = read_cpuid_mpidr();

	cpu = MPIDR_AFFINITY_LEVEL(mpidr, 0);

	cluster = MPIDR_AFFINITY_LEVEL(mpidr, 1);



	arch_spin_lock(&exynos_mcpm_lock);

	if (cpu_use_count[cpu][cluster] == 0)

		cpu_use_count[cpu][cluster] = 1;

	arch_spin_unlock(&exynos_mcpm_lock);

}



static void exynos_suspend(u64 residency)

{

	unsigned int mpidr, cpunr;



	exynos_power_down();



	/*

	 * Execution reaches here only if cpu did not power down.

	 * Hence roll back the changes done in exynos_power_down function.

	 *

	 * CAUTION: "This function requires the stack data to be visible through

	 * power down and can only be executed on processors like A15 and A7

	 * that hit the cache with the C bit clear in the SCTLR register."

	*/

	mpidr = read_cpuid_mpidr();

	cpunr = exynos_pmu_cpunr(mpidr);



	exynos_cpu_power_up(cpunr);

}



static const struct mcpm_platform_ops exynos_power_ops = {

	.power_up		= exynos_power_up,

	.power_down		= exynos_power_down,

	.wait_for_powerdown	= exynos_wait_for_powerdown,

	.suspend		= exynos_suspend,

	.powered_up		= exynos_powered_up,

};



static void __init exynos_mcpm_usage_count_init(void)