Messages in this thread Patch in this message | | | From | Caesar Wang <> | Subject | [PATCH v3 2/3] ARM: rockchip: ensure CPU to enter WFI/WFE state | Date | Fri, 5 Jun 2015 23:11:43 +0800 |
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In idle mode, core1/2/3 of Cortex-A17 should be either power off or in WFI/WFE state. we can delay 1ms to ensure the CPU enter WFI/WFE state.
Signed-off-by: Caesar Wang <wxt@rock-chips.com> ---
arch/arm/mach-rockchip/platsmp.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/arm/mach-rockchip/platsmp.c b/arch/arm/mach-rockchip/platsmp.c index 25da16f..6672fdd 100644 --- a/arch/arm/mach-rockchip/platsmp.c +++ b/arch/arm/mach-rockchip/platsmp.c @@ -325,6 +325,9 @@ static void __init rockchip_smp_prepare_cpus(unsigned int max_cpus) #ifdef CONFIG_HOTPLUG_CPU static int rockchip_cpu_kill(unsigned int cpu) { + /* ensure CPU can enter the WFI/WFE state */ + mdelay(1); + pmu_set_power_domain(0 + cpu, false); return 1; } -- 1.9.1
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