linux-kernel - Re: [PATCH 2/4] arm64: dts: rockchip: Arch counter doesn't tick in system suspend

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Date:   Tue, 22 Nov 2016 16:02:41 +0100
From:   Heiko Stübner <heiko@...ech.de>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     tglx@...utronix.de, linux-kernel@...r.kernel.org,
        Brian Norris <briannorris@...omium.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Douglas Anderson <dianders@...omium.org>,
        Caesar Wang <wxt@...k-chips.com>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        Xing Zheng <zhengxing@...k-chips.com>,
        Jianqun Xu <jay.xu@...k-chips.com>,
        Elaine Zhang <zhangqing@...k-chips.com>,
        David Wu <david.wu@...k-chips.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "moderated list:ARM64 PORT (AARCH64 ARCHITECTURE)" 
        <linux-arm-kernel@...ts.infradead.org>,
        "open list:ARM/Rockchip SoC support" 
        <linux-rockchip@...ts.infradead.org>
Subject: Re: [PATCH 2/4] arm64: dts: rockchip: Arch counter doesn't tick in system suspend

Am Dienstag, 22. November 2016, 10:44:22 schrieb Daniel Lezcano:
> From: Brian Norris <briannorris@...omium.org>
> 
> The "arm,no-tick-in-suspend" property was introduced to note
> implementations where the system counter does not quite follow the ARM
> specification that it "must be implemented in an always-on power
> domain".
> 
> Particularly, RK3399's counter stops ticking when we switch from the
> 24MHz clock to the 32KHz clock in low-power suspend, so let's mark it as
> such.
> 
> Signed-off-by: Brian Norris <briannorris@...omium.org>
> Reviewed-by: Douglas Anderson <dianders@...omium.org>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>

not sure if needed, but anyway
Acked-by: Heiko Stuebner <heiko@...ech.de>

> ---
>  arch/arm64/boot/dts/rockchip/rk3399.dtsi | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
> b/arch/arm64/boot/dts/rockchip/rk3399.dtsi index b65c193..d85b651 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
> +++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
> @@ -174,6 +174,7 @@
>  			     <GIC_PPI 14 IRQ_TYPE_LEVEL_LOW 0>,
>  			     <GIC_PPI 11 IRQ_TYPE_LEVEL_LOW 0>,
>  			     <GIC_PPI 10 IRQ_TYPE_LEVEL_LOW 0>;
> +		arm,no-tick-in-suspend;
>  	};
> 
>  	xin24m: xin24m {