From: Daniel Lezcano <daniel.lezcano@linaro.org>
To: tglx@linutronix.de
Cc: linux-kernel@vger.kernel.org,
Alexander Kochetkov <al.kochet@gmail.com>,
Heiko Stuebner <heiko@sntech.de>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Russell King <linux@armlinux.org.uk>,
"moderated list:ARM/Rockchip SoC support"
<linux-arm-kernel@lists.infradead.org>,
"open list:ARM/Rockchip SoC support"
<linux-rockchip@lists.infradead.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>
Subject: [PATCH 26/29] ARM: dts: rockchip: disable arm-global-timer for rk3188
Date: Sun, 16 Apr 2017 22:27:16 +0200 [thread overview]
Message-ID: <1492374441-23336-26-git-send-email-daniel.lezcano@linaro.org> (raw)
In-Reply-To: <1492374441-23336-1-git-send-email-daniel.lezcano@linaro.org>
From: Alexander Kochetkov <al.kochet@gmail.com>
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>
---
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 8428fae..1aff4ad2 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 {
--
2.7.4
prev parent reply other threads:[~2017-04-16 20:27 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20170416202542.GV2078@mai>
[not found] ` <1492374441-23336-1-git-send-email-daniel.lezcano@linaro.org>
2017-04-16 20:27 ` [PATCH 22/29] dt-bindings: Clarify compatible property for rockchip timers Daniel Lezcano
[not found] ` <1492374441-23336-22-git-send-email-daniel.lezcano-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2017-04-20 14:12 ` Rob Herring
2017-04-16 20:27 ` [PATCH 23/29] ARM: dts: rockchip: Update compatible property for rk322x timer Daniel Lezcano
2017-04-16 20:27 ` [PATCH 24/29] clocksource/drivers/rockchip_timer: Implement clocksource timer Daniel Lezcano
2017-04-16 20:27 ` [PATCH 25/29] ARM: dts: rockchip: Add timer entries to rk3188 SoC Daniel Lezcano
2017-04-16 20:27 ` Daniel Lezcano [this message]
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