From: Mark Rutland <mark.rutland@arm.com>
To: Kever Yang <ykai007@gmail.com>
Cc: "heiko@sntech.de" <heiko@sntech.de>,
"dianders@chromium.org" <dianders@chromium.org>,
"sonnyrao@chromium.org" <sonnyrao@chromium.org>,
"addy.ke@rock-chips.com" <addy.ke@rock-chips.com>,
"cf@rock-chips.com" <cf@rock-chips.com>,
"xjq@rock-chips.com" <xjq@rock-chips.com>,
"wulf@rock-chips.com" <wulf@rock-chips.com>,
"lyz@rock-chips.com" <lyz@rock-chips.com>,
"hj@rock-chips.com" <hj@rock-chips.com>,
"huangtao@rock-chips.com" <huangtao@rock-chips.com>,
Kever Yang <kever.yang@rock-chips.com>,
Rob Herring <robh+dt@kernel.org>, Pawel Moll <Pawel.Moll@arm.com>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Kumar Gala <galak@codeaurora.org>,
Russell King <linux@arm.linux.org.uk>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] ARM: dts: make arch-timer always on in rk3288 soc
Date: Wed, 27 Aug 2014 10:37:04 +0100 [thread overview]
Message-ID: <20140827093704.GA7295@leverpostej> (raw)
In-Reply-To: <1409104060-26294-1-git-send-email-kever.yang@rock-chips.com>
Hi,
On Wed, Aug 27, 2014 at 02:47:40AM +0100, Kever Yang wrote:
> We need use the hrtimer, which need the arch-timer to be 'always-on'
Just to check: it isn't possible to place CPUs in the rk3288 SoC into
low power states where their timers lose state and/or might not fire?
Mark.
> Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
> ---
>
> arch/arm/boot/dts/rk3288.dtsi | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm/boot/dts/rk3288.dtsi b/arch/arm/boot/dts/rk3288.dtsi
> index 5950b0a..698e6ea 100644
> --- a/arch/arm/boot/dts/rk3288.dtsi
> +++ b/arch/arm/boot/dts/rk3288.dtsi
> @@ -76,6 +76,7 @@
> <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
> <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
> clock-frequency = <24000000>;
> + always-on;
> };
>
> i2c1: i2c@ff140000 {
> --
> 1.9.1
>
> --
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prev parent reply other threads:[~2014-08-27 9:37 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-27 1:47 [PATCH] ARM: dts: make arch-timer always on in rk3288 soc Kever Yang
2014-08-27 9:37 ` Mark Rutland [this message]
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