From: Stefan Agner Date: Wed, 10 Jan 2018 21:04:47 +0000 (+0100) Subject: ARM: imx: add timer stop flag to ARM power off state X-Git-Tag: v4.17-rc1~104^2~29^2~4 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=49a1a99c530c297aad4e40af8cffa3195f4e1b58;p=uclinux-h8%2Flinux.git 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 --- diff --git a/arch/arm/mach-imx/cpuidle-imx6sx.c b/arch/arm/mach-imx/cpuidle-imx6sx.c index c5a5c3a70ab1..d0f14b761ff7 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",