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ARM: tegra20: add CPU hotplug support

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Hotplug function put CPU in offline or online mode at runtime.
When the CPU been put into offline, it was been clock gated. The
offline CPU can be power gated, when the remaining CPU goes into
LP2.

Based on the worked by:
Colin Cross <ccross@android.com>
Gary King <gking@nvidia.com>

Signed-off-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Joseph Lo
2012-08-16 17:31:52 +08:00
committed by Stephen Warren
parent 59b0f6825c
commit 453689e407
5 changed files with 96 additions and 0 deletions
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8
arch/arm/mach-tegra/hotplug.c
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@@ -56,6 +56,14 @@ int platform_cpu_disable(unsigned int cpu)
return cpu == 0 ? -EPERM : 0;
}
#ifdef CONFIG_ARCH_TEGRA_2x_SOC
extern void tegra20_hotplug_shutdown(void);
void __init tegra20_hotplug_init(void)
{
tegra_hotplug_shutdown = tegra20_hotplug_shutdown;
}
#endif
#ifdef CONFIG_ARCH_TEGRA_3x_SOC
extern void tegra30_hotplug_shutdown(void);
void __init tegra30_hotplug_init(void)