[PATCH AUTOSEL for 4.9 124/219] ARM: dts: rockchip: disable arm-global-timer for rk3188

Sasha Levin
2018-03-03T22:34:56Z

From: Alexander Kochetkov <al.kochet@gmail.com>

[ Upstream commit 500d0aa918a2ea6bb918fee8adcf27dc2912bcd1 ]

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>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.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 31f81b265cef..73a200914f0b 100644
--- a/arch/arm/boot/dts/rk3188.dtsi
+++ b/arch/arm/boot/dts/rk3188.dtsi
@@ -530,6 +530,7 @@

&global_timer {
interrupts = <GIC_PPI 11 0xf04>;
+ status = "disabled";
};

&local_timer {
--
2.14.1