diff options
| author | Krzysztof Kozlowski <krzk@kernel.org> | 2019-03-14 21:02:17 +0100 |
|---|---|---|
| committer | Krzysztof Kozlowski <krzk@kernel.org> | 2019-03-19 22:08:02 +0100 |
| commit | 5ab99cf7d5e96e3b727c30e7a8524c976bd3723d (patch) | |
| tree | 74abeceef5e1a6baaf4f89e597b3f79c366f4b2b /arch/arm/boot/dts/exynos5420-arndale-octa.dts | |
| parent | 9a435fb2291d583ae012d4e853bd9987b367bba1 (diff) | |
ARM: dts: exynos: Always enable necessary APIO_1V8 and ABB_1V8 regulators on Arndale Octa
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>
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 74184c6ce3bf..dbf0306896f6 100644 --- a/arch/arm/boot/dts/exynos5420-arndale-octa.dts +++ b/arch/arm/boot/dts/exynos5420-arndale-octa.dts @@ -372,6 +372,7 @@ regulator-name = "PVDD_APIO_1V8"; regulator-min-microvolt = <1800000>; regulator-max-microvolt = <1800000>; + regulator-always-on; }; ldo3_reg: LDO3 { @@ -416,6 +417,7 @@ regulator-name = "PVDD_ABB_1V8"; regulator-min-microvolt = <1800000>; regulator-max-microvolt = <1800000>; + regulator-always-on; }; ldo9_reg: LDO9 { |