This is a note to let you know that I've just added the patch titled
ARM: dts: Keep G3D regulator always on for exynos5250-arndale
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-dts-keep-g3d-regulator-always-on-for-exynos5250-arndale.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From bfeda827278f09f4db35877e5f1ca9c149ca2890 Mon Sep 17 00:00:00 2001
From: Tomasz Figa <t.figa@xxxxxxxxxxx>
Date: Fri, 14 Feb 2014 07:43:54 +0900
Subject: ARM: dts: Keep G3D regulator always on for exynos5250-arndale
From: Tomasz Figa <t.figa@xxxxxxxxxxx>
commit bfeda827278f09f4db35877e5f1ca9c149ca2890 upstream.
Apparently, if G3D regulator is powered off, the SoC cannot enter low
power modes and just hangs. This patch fixes this by keeping the
regulator always on when the system is running, as suggested by Exynos 4
User's Manual in case of Exynos4210/4x12 SoCs (Exynos5250 UM does not
have such note, but observed behavior seems to confirm that it is true
for this SoC as well).
This fixes an issue preventing Arndale board from entering sleep mode
observed since commit
346f372f7b72a0 clk: exynos5250: Add CLK_IGNORE_UNUSED flag for pmu clock
that landed in kernel 3.10, which has fixed the clock driver to make the
SoC actually try to enter the sleep mode.
Signed-off-by: Tomasz Figa <t.figa@xxxxxxxxxxx>
Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
Tested-by: Tushar Behera <tushar.behera@xxxxxxxxxx>
Signed-off-by: Kukjin Kim <kgene.kim@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/boot/dts/exynos5250-arndale.dts | 1 +
1 file changed, 1 insertion(+)
--- a/arch/arm/boot/dts/exynos5250-arndale.dts
+++ b/arch/arm/boot/dts/exynos5250-arndale.dts
@@ -287,6 +287,7 @@
regulator-name = "vdd_g3d";
regulator-min-microvolt = <1000000>;
regulator-max-microvolt = <1000000>;
+ regulator-always-on;
regulator-boot-on;
op_mode = <1>;
};
Patches currently in stable-queue which might be from t.figa@xxxxxxxxxxx are
queue-3.14/arm-dts-keep-g3d-regulator-always-on-for-exynos5250-arndale.patch
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