diff options
| author | Krzysztof Kozlowski <krzk@kernel.org> | 2019-03-14 21:02:17 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-15 11:54:59 +0200 |
| commit | ab6ada3c6a0debe6ddb024119680d89680715c53 (patch) | |
| tree | 5605d690b982056940ef2b3453f75395476dc9f9 /arch/arm/boot/dts/exynos5420-arndale-octa.dts | |
| parent | f3013a8ddd1f6c55389bf34b7d67beafa2365061 (diff) | |
ARM: dts: exynos: Always enable necessary APIO_1V8 and ABB_1V8 regulators on Arndale Octa
[ Upstream commit 5ab99cf7d5e96e3b727c30e7a8524c976bd3723d ]
The PVDD_APIO_1V8 (LDO2) and PVDD_ABB_1V8 (LDO8) regulators were turned
off by Linux kernel as unused. However they supply critical parts of
SoC so they should be always on:
1. PVDD_APIO_1V8 supplies SYS pins (gpx[0-3], PSHOLD), HDMI level shift,
RTC, VDD1_12 (DRAM internal 1.8 V logic), pull-up for PMIC interrupt
lines, TTL/UARTR level shift, reset pins and SW-TACT1 button.
It also supplies unused blocks like VDDQ_SRAM (for SROM controller) and
VDDQ_GPIO (gpm7, gpy7).
The LDO2 cannot be turned off (S2MPS11 keeps it on anyway) so
marking it "always-on" only reflects its real status.
2. PVDD_ABB_1V8 supplies Adaptive Body Bias Generator for ARM cores,
memory and Mali (G3D).
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/arm/boot/dts/exynos5420-arndale-octa.dts')
| -rw-r--r-- | arch/arm/boot/dts/exynos5420-arndale-octa.dts | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/exynos5420-arndale-octa.dts b/arch/arm/boot/dts/exynos5420-arndale-octa.dts index ee1bb9b8b366..38538211a967 100644 --- a/arch/arm/boot/dts/exynos5420-arndale-octa.dts +++ b/arch/arm/boot/dts/exynos5420-arndale-octa.dts @@ -109,6 +109,7 @@ regulator-name = "PVDD_APIO_1V8"; regulator-min-microvolt = <1800000>; regulator-max-microvolt = <1800000>; + regulator-always-on; }; ldo3_reg: LDO3 { @@ -147,6 +148,7 @@ regulator-name = "PVDD_ABB_1V8"; regulator-min-microvolt = <1800000>; regulator-max-microvolt = <1800000>; + regulator-always-on; }; ldo9_reg: LDO9 { |