Commit 6e63900b authored by Krzysztof Kozlowski's avatar Krzysztof Kozlowski Committed by Greg Kroah-Hartman

ARM: dts: exynos: Always enable necessary APIO_1V8 and ABB_1V8 regulators on Arndale Octa

[ Upstream commit 5ab99cf7 ]

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: default avatarKrzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 4effefce
...@@ -107,6 +107,7 @@ ldo2_reg: LDO2 { ...@@ -107,6 +107,7 @@ ldo2_reg: LDO2 {
regulator-name = "PVDD_APIO_1V8"; regulator-name = "PVDD_APIO_1V8";
regulator-min-microvolt = <1800000>; regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>; regulator-max-microvolt = <1800000>;
regulator-always-on;
}; };
ldo3_reg: LDO3 { ldo3_reg: LDO3 {
...@@ -145,6 +146,7 @@ ldo8_reg: LDO8 { ...@@ -145,6 +146,7 @@ ldo8_reg: LDO8 {
regulator-name = "PVDD_ABB_1V8"; regulator-name = "PVDD_ABB_1V8";
regulator-min-microvolt = <1800000>; regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>; regulator-max-microvolt = <1800000>;
regulator-always-on;
}; };
ldo9_reg: LDO9 { ldo9_reg: LDO9 {
......
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