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.
Signed-off-by: Dmitry Osipenko <[email protected]> --- arch/arm/mach-tegra/pm.c | 14 ++++++++++++++ arch/arm/mach-tegra/pm.h | 5 +++++ 2 files changed, 19 insertions(+) diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c index 3cab81b82866..f5ff3dd1dd81 100644 --- a/arch/arm/mach-tegra/pm.c +++ b/arch/arm/mach-tegra/pm.c @@ -436,4 +436,18 @@ void __init tegra_init_suspend(void) suspend_set_ops(&tegra_suspend_ops); } + +int tegra_pm_park_secondary_cpu(unsigned long cpu) +{ + if (cpu > 0) { + tegra_disable_clean_inv_dcache(TEGRA_FLUSH_CACHE_LOUIS); + + if (tegra_get_chip_id() == TEGRA20) + tegra20_hotplug_shutdown(); + else + tegra30_hotplug_shutdown(); + } + + return -EINVAL; +} #endif diff --git a/arch/arm/mach-tegra/pm.h b/arch/arm/mach-tegra/pm.h index 569151b3edc0..9a790f00237f 100644 --- a/arch/arm/mach-tegra/pm.h +++ b/arch/arm/mach-tegra/pm.h @@ -31,8 +31,13 @@ extern void (*tegra_tear_down_cpu)(void); #ifdef CONFIG_PM_SLEEP void tegra_init_suspend(void); +int tegra_pm_park_secondary_cpu(unsigned long cpu); #else static inline void tegra_init_suspend(void) {} +static inline int tegra_pm_park_secondary_cpu(unsigned long cpu) +{ + return -ENOTSUPP; +} #endif #endif /* _MACH_TEGRA_PM_H_ */ -- 2.23.0
