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ARM: tegra: hook tegra_tear_down_cpu function in the PM suspend init function

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The tegra_tear_down_cpu was used to cut off the CPU rail for various Tegra
SoCs. Hooking it in the PM suspend init function and making the CPUidle
driver more generic.

Signed-off-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Joseph Lo 2013-06-04 18:47:33 +08:00 committed by Stephen Warren
parent e22dc2b256
commit bf91add4a0
3 changed files with 15 additions and 6 deletions
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3
arch/arm/mach-tegra/cpuidle-tegra20.c
View File

@ -214,8 +214,5 @@ static int tegra20_idle_lp2_coupled(struct cpuidle_device *dev,
int __init tegra20_cpuidle_init(void)
{
#ifdef CONFIG_PM_SLEEP
tegra_tear_down_cpu = tegra20_tear_down_cpu;
#endif
return cpuidle_register(&tegra_idle_driver, cpu_possible_mask);
}

3
arch/arm/mach-tegra/cpuidle-tegra30.c
View File

@ -146,8 +146,5 @@ static int tegra30_idle_lp2(struct cpuidle_device *dev,
int __init tegra30_cpuidle_init(void)
{
#ifdef CONFIG_PM_SLEEP
tegra_tear_down_cpu = tegra30_tear_down_cpu;
#endif
return cpuidle_register(&tegra_idle_driver, NULL);
}

15
arch/arm/mach-tegra/pm.c
View File

@ -44,6 +44,20 @@
static DEFINE_SPINLOCK(tegra_lp2_lock);
void (*tegra_tear_down_cpu)(void);
static void tegra_tear_down_cpu_init(void)
{
switch (tegra_chip_id) {
case TEGRA20:
if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC))
tegra_tear_down_cpu = tegra20_tear_down_cpu;
break;
case TEGRA30:
if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC))
tegra_tear_down_cpu = tegra30_tear_down_cpu;
break;
}
}
/*
* restore_cpu_complex
*
@ -224,6 +238,7 @@ void __init tegra_init_suspend(void)
if (tegra_pmc_get_suspend_mode() == TEGRA_SUSPEND_NONE)
return;
tegra_tear_down_cpu_init();
tegra_pmc_suspend_init();
suspend_set_ops(&tegra_suspend_ops);