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 <w...@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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