From: Dong Aisheng <dongas86-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: Stefan Agner <stefan-XLVq0VzYD2Y@public.gmane.org>
Cc: shawnguo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
kernel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org,
fabio.estevam-3arQi8VN3Tc@public.gmane.org,
robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
mark.rutland-5wv7dgnIgG8@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Anson Huang <anson.huang-3arQi8VN3Tc@public.gmane.org>,
linux-imx-3arQi8VN3Tc@public.gmane.org
Subject: Re: [PATCH 1/7] ARM: imx: add timer stop flag to ARM power off state
Date: Tue, 9 Jan 2018 17:22:32 +0800 [thread overview]
Message-ID: <20180109092232.GA26312@b29396-OptiPlex-7040> (raw)
In-Reply-To: <20180102164223.15230-1-stefan-XLVq0VzYD2Y@public.gmane.org>
On Tue, Jan 02, 2018 at 05:42:17PM +0100, Stefan Agner wrote:
> 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.
>
> Cc: Anson Huang <anson.huang-3arQi8VN3Tc@public.gmane.org>
> Signed-off-by: Stefan Agner <stefan-XLVq0VzYD2Y@public.gmane.org>
It seems ok at my side.
Did you meet the real issue? If yes, how to reproduce?
Both mx6sx and mx6ul are using GPT which do not need that flag, suppose
we should remove it, right?
Anson can help confirm it.
Regards
Dong Aisheng
> ---
> 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 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",
> --
> 2.15.1
>
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next prev parent reply other threads:[~2018-01-09 9:22 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-02 16:42 [PATCH 1/7] ARM: imx: add timer stop flag to ARM power off state Stefan Agner
2018-01-02 16:42 ` [PATCH 2/7] ARM: dts: imx6ul: update i.MX 6UltraLite iomux headers Stefan Agner
2018-01-05 16:45 ` Rob Herring
2018-01-06 10:47 ` Stefan Agner
2018-01-08 1:37 ` Andy Duan
2018-01-09 9:24 ` Dong Aisheng
2018-01-02 16:42 ` [PATCH 3/7] ARM: dts: imx6ull: add additional pinfunc defines for i.MX 6ULL Stefan Agner
[not found] ` <20180102164223.15230-3-stefan-XLVq0VzYD2Y@public.gmane.org>
2018-01-05 16:49 ` Rob Herring
2018-01-07 9:52 ` Stefan Agner
[not found] ` <b183c2a38596cd3f3726777c79e027f9-XLVq0VzYD2Y@public.gmane.org>
2018-01-09 9:30 ` Dong Aisheng
2018-01-02 16:42 ` [PATCH 4/7] ARM: dts: imx6ul: add interrupt of virt-capable GIC Stefan Agner
2018-01-02 16:42 ` [PATCH 5/7] ARM: dts: imx6ul: add ARM architected timer Stefan Agner
[not found] ` <20180102164223.15230-5-stefan-XLVq0VzYD2Y@public.gmane.org>
2018-01-09 9:34 ` Dong Aisheng
2018-01-09 13:18 ` Stefan Agner
2018-01-02 16:42 ` [PATCH 6/7] ARM: dts: imx6ull: add IOMUXC SNVS instance Stefan Agner
2018-01-09 9:35 ` Dong Aisheng
[not found] ` <20180102164223.15230-1-stefan-XLVq0VzYD2Y@public.gmane.org>
2018-01-02 16:42 ` [PATCH 7/7] ARM: dts: imx6ull: add UART8 support Stefan Agner
2018-01-09 9:38 ` Dong Aisheng
2018-01-09 9:22 ` Dong Aisheng [this message]
2018-01-09 9:25 ` [PATCH 1/7] ARM: imx: add timer stop flag to ARM power off state Anson Huang
2018-01-09 10:13 ` Lucas Stach
[not found] ` <1515492803.12538.29.camel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
2018-01-09 13:37 ` Stefan Agner
2018-01-09 14:04 ` Lucas Stach
2018-01-09 22:21 ` Stefan Agner
2018-01-09 13:22 ` Stefan Agner
2018-01-10 17:48 ` Lucas Stach
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