From: Shawn Guo <shawnguo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Stefan Agner <stefan-XLVq0VzYD2Y@public.gmane.org>
Cc: 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>
Subject: Re: [PATCH v2 1/7] ARM: imx: add timer stop flag to ARM power off state
Date: Fri, 2 Feb 2018 14:16:41 +0800 [thread overview]
Message-ID: <20180202061605.GL20833@dragon> (raw)
In-Reply-To: <20180110210453.19264-1-stefan-XLVq0VzYD2Y@public.gmane.org>
On Wed, Jan 10, 2018 at 10:04:47PM +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.
>
> 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 <anson.huang-3arQi8VN3Tc@public.gmane.org>
> Signed-off-by: Stefan Agner <stefan-XLVq0VzYD2Y@public.gmane.org>
> Reviewed-by: Lucas Stach <l.stach-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
Applied all, thanks.
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prev parent reply other threads:[~2018-02-02 6:16 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-10 21:04 [PATCH v2 1/7] ARM: imx: add timer stop flag to ARM power off state Stefan Agner
2018-01-10 21:04 ` [PATCH v2 2/7] ARM: dts: imx6ul: update i.MX 6UltraLite iomux headers Stefan Agner
2018-01-10 21:04 ` [PATCH v2 3/7] ARM: dts: imx6ull: add additional pinfunc defines for i.MX 6ULL Stefan Agner
2018-01-10 21:04 ` [PATCH v2 4/7] ARM: dts: imx6ul: add interrupt of virt-capable GIC Stefan Agner
2018-01-10 21:04 ` [PATCH v2 5/7] ARM: dts: imx6ul: add ARM architected timer Stefan Agner
2018-01-10 21:04 ` [PATCH v2 6/7] ARM: dts: imx6ull: add IOMUXC SNVS instance Stefan Agner
[not found] ` <20180110210453.19264-1-stefan-XLVq0VzYD2Y@public.gmane.org>
2018-01-10 21:04 ` [PATCH v2 7/7] ARM: dts: imx6ull: add UART8 support Stefan Agner
2018-02-02 6:16 ` Shawn Guo [this message]
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