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

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Date:   Tue, 22 Nov 2016 10:44:22 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     tglx@...utronix.de
Cc:     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>,
        Heiko Stuebner <heiko@...ech.de>,
        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>,
        devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED
        DEVICE TREE BINDINGS),
        linux-arm-kernel@...ts.infradead.org (moderated list:ARM64 PORT
        (AARCH64 ARCHITECTURE)),
        linux-rockchip@...ts.infradead.org (open list:ARM/Rockchip SoC support)
Subject: [PATCH 2/4] arm64: dts: rockchip: Arch counter doesn't tick in system suspend

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>
---
 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 {
-- 
2.7.4