Commit bfeda827 authored by Tomasz Figa's avatar Tomasz Figa Committed by Kukjin Kim

ARM: dts: Keep G3D regulator always on for exynos5250-arndale

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

346f372f 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: default avatarTomasz Figa <t.figa@samsung.com>
Acked-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
Cc: <stable@vger.kernel.org>        [v3.10+]
Tested-by: default avatarTushar Behera <tushar.behera@linaro.org>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
parent 469641ca
...@@ -287,6 +287,7 @@ buck4_reg: BUCK4 { ...@@ -287,6 +287,7 @@ buck4_reg: BUCK4 {
regulator-name = "vdd_g3d"; regulator-name = "vdd_g3d";
regulator-min-microvolt = <1000000>; regulator-min-microvolt = <1000000>;
regulator-max-microvolt = <1000000>; regulator-max-microvolt = <1000000>;
regulator-always-on;
regulator-boot-on; regulator-boot-on;
op_mode = <1>; op_mode = <1>;
}; };
......
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