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From: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Daniel Lezcano <daniel.lezcano-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Cc: tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Brian Norris
	<briannorris-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
	Marc Zyngier <marc.zyngier-5wv7dgnIgG8@public.gmane.org>,
	Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
	Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>,
	Douglas Anderson
	<dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
	Scott Wood <oss-fOR+EgIDQEHk1uMJSBkQmQ@public.gmane.org>,
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
	<devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	"moderated list:ARM ARCHITECTED TIMER DRIVER"
	<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>
Subject: Re: [PATCH 1/4] clocksource/drivers/arm_arch_timer: Don't assume clock runs in suspend
Date: Wed, 23 Nov 2016 17:07:25 -0600	[thread overview]
Message-ID: <20161123230725.c3euemhmfnm3qjtn@rob-hp-laptop> (raw)
In-Reply-To: <1479807866-6957-1-git-send-email-daniel.lezcano-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>

On Tue, Nov 22, 2016 at 10:44:21AM +0100, Daniel Lezcano wrote:
> From: Brian Norris <briannorris-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
> 
> The ARM specifies that the system counter "must be implemented in an
> always-on power domain," and so we try to use the counter as a source of
> timekeeping across suspend/resume. Unfortunately, some SoCs (e.g.,
> Rockchip's RK3399) do not keep the counter ticking properly when
> switched from their high-power clock to the lower-power clock used in
> system suspend. Support this quirk by adding a new device tree property.
> 
> Signed-off-by: Brian Norris <briannorris-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
> Reviewed-by: Douglas Anderson <dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
> Acked-by: Marc Zyngier <marc.zyngier-5wv7dgnIgG8@public.gmane.org>
> Signed-off-by: Daniel Lezcano <daniel.lezcano-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
> ---
>  Documentation/devicetree/bindings/arm/arch_timer.txt | 5 +++++

Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>

>  drivers/clocksource/arm_arch_timer.c                 | 9 ++++++++-
>  2 files changed, 13 insertions(+), 1 deletion(-)
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      parent reply	other threads:[~2016-11-23 23:07 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20161122094300.GA2017@mai>
2016-11-22  9:44 ` [PATCH 1/4] clocksource/drivers/arm_arch_timer: Don't assume clock runs in suspend Daniel Lezcano
     [not found]   ` <1479807866-6957-1-git-send-email-daniel.lezcano-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2016-11-22  9:44     ` [PATCH 2/4] arm64: dts: rockchip: Arch counter doesn't tick in system suspend Daniel Lezcano
     [not found]       ` <1479807866-6957-2-git-send-email-daniel.lezcano-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2016-11-22 15:02         ` Heiko Stübner
2016-11-23 23:07     ` Rob Herring [this message]

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