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: Thomas Gleixner <tglx@linutronix.de>,
Mark Rutland <mark.rutland@arm.com>,
Rob Herring <robh+dt@kernel.org>,
Russell King <linux@armlinux.org.uk>,
Caesar Wang <wxt@rock-chips.com>,
Huang Tao <huangtao@rock-chips.com>,
Alexander Kochetkov <al.kochet@gmail.com>
Subject: [PATCH v6 5/5] ARM: dts: rockchip: disable arm-global-timer for rk3188
Date: Tue, 31 Jan 2017 15:43:16 +0300 [thread overview]
Message-ID: <1485866596-32254-6-git-send-email-al.kochet@gmail.com> (raw)
In-Reply-To: <1485866596-32254-1-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>
---
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
WARNING: multiple messages have this Message-ID (diff)
From: Alexander Kochetkov <al.kochet-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: Daniel Lezcano
<daniel.lezcano-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Cc: Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Russell King <linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org>,
Caesar Wang <wxt-TNX95d0MmH7DzftRWevZcw@public.gmane.org>,
Huang Tao <huangtao-TNX95d0MmH7DzftRWevZcw@public.gmane.org>,
Alexander Kochetkov
<al.kochet-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: [PATCH v6 5/5] ARM: dts: rockchip: disable arm-global-timer for rk3188
Date: Tue, 31 Jan 2017 15:43:16 +0300 [thread overview]
Message-ID: <1485866596-32254-6-git-send-email-al.kochet@gmail.com> (raw)
In-Reply-To: <1485866596-32254-1-git-send-email-al.kochet-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
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-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
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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WARNING: multiple messages have this Message-ID (diff)
From: al.kochet@gmail.com (Alexander Kochetkov)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v6 5/5] ARM: dts: rockchip: disable arm-global-timer for rk3188
Date: Tue, 31 Jan 2017 15:43:16 +0300 [thread overview]
Message-ID: <1485866596-32254-6-git-send-email-al.kochet@gmail.com> (raw)
In-Reply-To: <1485866596-32254-1-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>
---
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
next prev parent reply other threads:[~2017-01-31 12:44 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-31 12:43 [PATCH v6 0/5] Implement clocksource for rockchip SoC using rockchip timer Alexander Kochetkov
2017-01-31 12:43 ` Alexander Kochetkov
2017-01-31 12:43 ` Alexander Kochetkov
2017-01-31 12:43 ` [PATCH v6 1/5] dt-bindings: clarify compatible property for rockchip timers Alexander Kochetkov
2017-01-31 12:43 ` Alexander Kochetkov
2017-02-01 9:33 ` Heiko Stuebner
2017-02-01 9:33 ` Heiko Stuebner
2017-02-01 9:33 ` Heiko Stuebner
2017-01-31 12:43 ` [PATCH v6 2/5] ARM: dts: rockchip: update compatible property for rk322x timer Alexander Kochetkov
2017-01-31 12:43 ` Alexander Kochetkov
2017-01-31 12:43 ` Alexander Kochetkov
2017-02-01 9:34 ` Heiko Stuebner
2017-02-01 9:34 ` Heiko Stuebner
2017-02-01 9:34 ` Heiko Stuebner
2017-01-31 12:43 ` [PATCH v6 3/5] clocksource/drivers/rockchip_timer: implement clocksource timer Alexander Kochetkov
2017-01-31 12:43 ` Alexander Kochetkov
2017-01-31 12:43 ` Alexander Kochetkov
2017-01-31 12:43 ` [PATCH v6 4/5] ARM: dts: rockchip: add timer entries to rk3188 SoC Alexander Kochetkov
2017-01-31 12:43 ` Alexander Kochetkov
2017-01-31 12:43 ` Alexander Kochetkov
2017-02-01 9:43 ` Heiko Stuebner
2017-02-01 9:43 ` Heiko Stuebner
2017-01-31 12:43 ` Alexander Kochetkov [this message]
2017-01-31 12:43 ` [PATCH v6 5/5] ARM: dts: rockchip: disable arm-global-timer for rk3188 Alexander Kochetkov
2017-01-31 12:43 ` Alexander Kochetkov
2017-02-01 9:48 ` Heiko Stuebner
2017-02-01 9:48 ` Heiko Stuebner
2017-02-01 9:48 ` Heiko Stuebner
2017-03-20 13:18 ` [PATCH v6 0/5] Implement clocksource for rockchip SoC using rockchip timer Alexander Kochetkov
2017-03-20 13:18 ` Alexander Kochetkov
2017-03-20 13:18 ` Alexander Kochetkov
2017-03-21 8:02 ` Daniel Lezcano
2017-03-21 8:02 ` Daniel Lezcano
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