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ARM: tegra: Add tegra_pm_park_secondary_cpu()
This function resembles tegra_cpu_die() of the hotplug code, but this variant is more suitable to be used for CPU PM because it's made specifically to be used by cpu_suspend(). In short this function puts secondary CPU offline, it will be used by the new CPUIDLE driver. Acked-by: Peter De Schrijver <pdeschrijver@nvidia.com> Tested-by: Peter Geis <pgwipeout@gmail.com> Tested-by: Jasper Korten <jja2000@gmail.com> Tested-by: David Heidelberg <david@ixit.cz> Tested-by: Nicolas Chauvet <kwizart@gmail.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
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@ -436,4 +436,18 @@ void __init tegra_init_suspend(void)
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suspend_set_ops(&tegra_suspend_ops);
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}
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int tegra_pm_park_secondary_cpu(unsigned long cpu)
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{
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if (cpu > 0) {
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tegra_disable_clean_inv_dcache(TEGRA_FLUSH_CACHE_LOUIS);
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if (tegra_get_chip_id() == TEGRA20)
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tegra20_hotplug_shutdown();
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else
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tegra30_hotplug_shutdown();
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}
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return -EINVAL;
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}
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#endif
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@ -31,8 +31,13 @@ extern void (*tegra_tear_down_cpu)(void);
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#ifdef CONFIG_PM_SLEEP
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void tegra_init_suspend(void);
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int tegra_pm_park_secondary_cpu(unsigned long cpu);
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#else
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static inline void tegra_init_suspend(void) {}
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static inline int tegra_pm_park_secondary_cpu(unsigned long cpu)
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{
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return -ENOTSUPP;
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}
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#endif
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#endif /* _MACH_TEGRA_PM_H_ */
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