From 49a1a99c530c297aad4e40af8cffa3195f4e1b58 Mon Sep 17 00:00:00 2001 From: Stefan Agner Date: Wed, 10 Jan 2018 22:04:47 +0100 Subject: [PATCH] ARM: imx: add timer stop flag to ARM power off state When the CPU is in ARM power off state the ARM architected timers are stopped. The flag is already present in the higher power WAIT mode. This allows to use the ARM generic timer on i.MX 6UL/6ULL SoC. Without the flag the kernel freezes when the timer enters the first time ARM power off mode. Note: The default timer on i.MX6SX is the i.MX GPT timer which is not disabled during CPU idle. However, the timer is not affected by the CPUIDLE_FLAG_TIMER_STOP flag. The flag only affects CPU local timers. Cc: Anson Huang Signed-off-by: Stefan Agner Reviewed-by: Lucas Stach Signed-off-by: Shawn Guo --- arch/arm/mach-imx/cpuidle-imx6sx.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/mach-imx/cpuidle-imx6sx.c b/arch/arm/mach-imx/cpuidle-imx6sx.c index c5a5c3a..d0f14b7 100644 --- a/arch/arm/mach-imx/cpuidle-imx6sx.c +++ b/arch/arm/mach-imx/cpuidle-imx6sx.c @@ -89,6 +89,7 @@ static struct cpuidle_driver imx6sx_cpuidle_driver = { */ .exit_latency = 300, .target_residency = 500, + .flags = CPUIDLE_FLAG_TIMER_STOP, .enter = imx6sx_enter_wait, .name = "LOW-POWER-IDLE", .desc = "ARM power off", -- 2.7.4