From: shawnguo@kernel.org (Shawn Guo)
To: linux-arm-kernel@lists.infradead.org
Subject: [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@agner.ch>
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@nxp.com>
> Signed-off-by: Stefan Agner <stefan@agner.ch>
> Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Applied all, thanks.
WARNING: multiple messages have this Message-ID (diff)
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.
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
WARNING: multiple messages have this Message-ID (diff)
From: Shawn Guo <shawnguo@kernel.org>
To: Stefan Agner <stefan@agner.ch>
Cc: kernel@pengutronix.de, fabio.estevam@nxp.com, robh+dt@kernel.org,
mark.rutland@arm.com, linux-arm-kernel@lists.infradead.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
Anson Huang <anson.huang@nxp.com>
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@agner.ch>
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@nxp.com>
> Signed-off-by: Stefan Agner <stefan@agner.ch>
> Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Applied all, thanks.
next prev parent reply other threads:[~2018-02-02 6:16 UTC|newest]
Thread overview: 21+ 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 ` 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 ` Stefan Agner
2018-01-10 21:04 ` 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 ` Stefan Agner
2018-01-10 21:04 ` 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 ` 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 ` Stefan Agner
2018-01-10 21:04 ` Stefan Agner
2018-01-10 21:04 ` [PATCH v2 6/7] ARM: dts: imx6ull: add IOMUXC SNVS instance Stefan Agner
2018-01-10 21:04 ` Stefan Agner
2018-01-10 21:04 ` [PATCH v2 7/7] ARM: dts: imx6ull: add UART8 support Stefan Agner
2018-01-10 21:04 ` Stefan Agner
2018-01-10 21:04 ` Stefan Agner
2018-02-02 6:16 ` Shawn Guo [this message]
2018-02-02 6:16 ` [PATCH v2 1/7] ARM: imx: add timer stop flag to ARM power off state Shawn Guo
2018-02-02 6:16 ` Shawn Guo
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180202061605.GL20833@dragon \
--to=shawnguo@kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.