releases/4.19.51/arm-dts-exynos-always-enable-necessary-apio_1v8-and-.patch

   1 From 6fed5b28e9dc4ffbea609c6051e201abc155b3a4 Mon Sep 17 00:00:00 2001
   2 From: Krzysztof Kozlowski <krzk@kernel.org>
   3 Date: Thu, 14 Mar 2019 21:02:17 +0100
   4 Subject: ARM: dts: exynos: Always enable necessary APIO_1V8 and ABB_1V8
   5  regulators on Arndale Octa
   6
   7 [ Upstream commit 5ab99cf7d5e96e3b727c30e7a8524c976bd3723d ]
   8
   9 The PVDD_APIO_1V8 (LDO2) and PVDD_ABB_1V8 (LDO8) regulators were turned
  10 off by Linux kernel as unused.  However they supply critical parts of
  11 SoC so they should be always on:
  12
  13 1. PVDD_APIO_1V8 supplies SYS pins (gpx[0-3], PSHOLD), HDMI level shift,
  14    RTC, VDD1_12 (DRAM internal 1.8 V logic), pull-up for PMIC interrupt
  15    lines, TTL/UARTR level shift, reset pins and SW-TACT1 button.
  16    It also supplies unused blocks like VDDQ_SRAM (for SROM controller) and
  17    VDDQ_GPIO (gpm7, gpy7).
  18    The LDO2 cannot be turned off (S2MPS11 keeps it on anyway) so
  19    marking it "always-on" only reflects its real status.
  20
  21 2. PVDD_ABB_1V8 supplies Adaptive Body Bias Generator for ARM cores,
  22    memory and Mali (G3D).
  23
  24 Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
  25 Signed-off-by: Sasha Levin <sashal@kernel.org>
  26 ---
  27  arch/arm/boot/dts/exynos5420-arndale-octa.dts | 2 ++
  28  1 file changed, 2 insertions(+)
  29
  30 diff --git a/arch/arm/boot/dts/exynos5420-arndale-octa.dts b/arch/arm/boot/dts/exynos5420-arndale-octa.dts
  31 index cdda614e417e..a370857beac0 100644
  32 --- a/arch/arm/boot/dts/exynos5420-arndale-octa.dts
  33 +++ b/arch/arm/boot/dts/exynos5420-arndale-octa.dts
  34 @@ -106,6 +106,7 @@
  35                                 regulator-name = "PVDD_APIO_1V8";
  36                                 regulator-min-microvolt = <1800000>;
  37                                 regulator-max-microvolt = <1800000>;
  38 +                               regulator-always-on;
  39                         };
  40
  41                         ldo3_reg: LDO3 {
  42 @@ -144,6 +145,7 @@
  43                                 regulator-name = "PVDD_ABB_1V8";
  44                                 regulator-min-microvolt = <1800000>;
  45                                 regulator-max-microvolt = <1800000>;
  46 +                               regulator-always-on;
  47                         };
  48
  49                         ldo9_reg: LDO9 {
  50 --
  51 2.20.1
  52