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[PATCH v6 5/5] ARM: dts: rockchip: disable arm-global-timer for rk3188

From Alexander Kochetkov <al.kochet@gmail.com>
Newsgroups linux.kernel
Subject [PATCH v6 5/5] ARM: dts: rockchip: disable arm-global-timer for rk3188
Date 2017-01-31 13:50 +0100
Message-ID <t5G2K-Kr-27@gated-at.bofh.it> (permalink)
References <t5G2J-Kr-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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The clocksource and the sched_clock provided by the arm_global_timer
are quite unstable because their rates depend on the cpu frequency.

On the other side, the arm_global_timer has a higher rating than the
rockchip_timer, it will be selected by default by the time framework
while we want to use the stable rockchip clocksource.

Let's disable the arm_global_timer in order to have the rockchip
clocksource selected by default.

Signed-off-by: Alexander Kochetkov <al.kochet@gmail.com>
---
 arch/arm/boot/dts/rk3188.dtsi |    1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/rk3188.dtsi b/arch/arm/boot/dts/rk3188.dtsi
index 0dc52fe..44da3d42 100644
--- a/arch/arm/boot/dts/rk3188.dtsi
+++ b/arch/arm/boot/dts/rk3188.dtsi
@@ -546,6 +546,7 @@
 
 &global_timer {
 	interrupts = <GIC_PPI 11 0xf04>;
+	status = "disabled";
 };
 
 &local_timer {
-- 
1.7.9.5

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Thread

[PATCH v6 0/5] Implement clocksource for rockchip SoC using rockchip timer Alexander Kochetkov <al.kochet@gmail.com> - 2017-01-31 13:50 +0100
  [PATCH v6 4/5] ARM: dts: rockchip: add timer entries to rk3188 SoC Alexander Kochetkov <al.kochet@gmail.com> - 2017-01-31 13:50 +0100
    Re: [PATCH v6 4/5] ARM: dts: rockchip: add timer entries to rk3188 SoC Heiko Stuebner <heiko@sntech.de> - 2017-02-01 10:50 +0100
  [PATCH v6 3/5] clocksource/drivers/rockchip_timer: implement clocksource timer Alexander Kochetkov <al.kochet@gmail.com> - 2017-01-31 13:50 +0100
  [PATCH v6 5/5] ARM: dts: rockchip: disable arm-global-timer for rk3188 Alexander Kochetkov <al.kochet@gmail.com> - 2017-01-31 13:50 +0100
    Re: [PATCH v6 5/5] ARM: dts: rockchip: disable arm-global-timer for rk3188 Heiko Stuebner <heiko@sntech.de> - 2017-02-01 10:50 +0100

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