| Message ID | 20190314200217.6002-1-krzk@kernel.org (mailing list archive) |
|---|---|
| State | Mainlined, archived |
| Commit | 5ab99cf7d5e96e3b727c30e7a8524c976bd3723d |
| Headers | show |
| Series | ARM: dts: exynos: Always enable necessary APIO_1V8 and ABB_1V8 regulators on Arndale Octa | expand |
diff --git a/arch/arm/boot/dts/exynos5420-arndale-octa.dts b/arch/arm/boot/dts/exynos5420-arndale-octa.dts index 3447160e1fbf..a0e27e1c0feb 100644 --- a/arch/arm/boot/dts/exynos5420-arndale-octa.dts +++ b/arch/arm/boot/dts/exynos5420-arndale-octa.dts @@ -107,6 +107,7 @@ regulator-name = "PVDD_APIO_1V8"; regulator-min-microvolt = <1800000>; regulator-max-microvolt = <1800000>; + regulator-always-on; }; ldo3_reg: LDO3 { @@ -145,6 +146,7 @@ regulator-name = "PVDD_ABB_1V8"; regulator-min-microvolt = <1800000>; regulator-max-microvolt = <1800000>; + regulator-always-on; }; ldo9_reg: LDO9 {
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> --- arch/arm/boot/dts/exynos5420-arndale-octa.dts | 2 ++ 1 file changed, 2 insertions(+)