From: Alexander Kochetkov <al.kochet@gmail.com>
To: Daniel Lezcano <daniel.lezcano@linaro.org>,
Heiko Stuebner <heiko@sntech.de>,
linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-rockchip@lists.infradead.org
Cc: Mark Rutland <mark.rutland@arm.com>,
Huang Tao <huangtao@rock-chips.com>,
Alexander Kochetkov <al.kochet@gmail.com>,
Russell King <linux@armlinux.org.uk>,
Rob Herring <robh+dt@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Caesar Wang <wxt@rock-chips.com>
Subject: [PATCH v7 7/7] ARM: dts: rockchip: disable arm-global-timer for rk3188
Date: Wed, 22 Mar 2017 18:48:34 +0300 [thread overview]
Message-ID: <1490197714-25415-8-git-send-email-al.kochet@gmail.com> (raw)
In-Reply-To: <1490197714-25415-1-git-send-email-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>
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 a20d501..c316468 100644
--- a/arch/arm/boot/dts/rk3188.dtsi
+++ b/arch/arm/boot/dts/rk3188.dtsi
@@ -548,6 +548,7 @@
&global_timer {
interrupts = <GIC_PPI 11 0xf04>;
+ status = "disabled";
};
&local_timer {
--
1.7.9.5
next prev parent reply other threads:[~2017-03-22 15:48 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-22 15:48 [PATCH v7 0/7] Implement clocksource for rockchip SoC using rockchip timer Alexander Kochetkov
2017-03-22 15:48 ` [PATCH v7 1/7] clocksource/drivers/clksrc-evt-probe: Describe with the DT both the clocksource and the clockevent Alexander Kochetkov
2017-03-29 1:51 ` Rob Herring
2017-03-29 9:22 ` Daniel Lezcano
2017-03-29 10:49 ` Mark Rutland
2017-03-29 12:36 ` Daniel Lezcano
2017-03-29 12:57 ` Mark Rutland
2017-03-29 13:41 ` Daniel Lezcano
2017-03-29 14:34 ` Mark Rutland
2017-03-22 15:48 ` [PATCH v7 4/7] ARM: dts: rockchip: add clockevent attribute to rockchip timers Alexander Kochetkov
2017-03-22 15:48 ` [PATCH v7 5/7] clocksource/drivers/rockchip_timer: implement clocksource timer Alexander Kochetkov
[not found] ` <1490197714-25415-6-git-send-email-al.kochet-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-03-24 8:29 ` kbuild test robot
2017-03-24 8:41 ` Alexander Kochetkov
[not found] ` <B771814D-541A-4D89-AC8A-5FFF84DE2E66-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-03-24 8:55 ` Daniel Lezcano
[not found] ` <1490197714-25415-1-git-send-email-al.kochet-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-03-22 15:48 ` [PATCH v7 2/7] dt-bindings: clarify compatible property for rockchip timers Alexander Kochetkov
2017-03-22 15:48 ` [PATCH v7 3/7] ARM: dts: rockchip: update compatible property for rk322x timer Alexander Kochetkov
2017-03-22 15:48 ` [PATCH v7 6/7] ARM: dts: rockchip: add timer entries to rk3188 SoC Alexander Kochetkov
2017-03-22 15:48 ` Alexander Kochetkov [this message]
2017-03-29 13:22 ` [PATCH v7 0/7] Implement clocksource for rockchip SoC using rockchip timer Alexander Kochetkov
[not found] ` <DAFDD95C-3244-4217-B3A4-E9FB176AE989-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-03-30 9:26 ` Daniel Lezcano
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