| From 2ec60f0c58f46b410ad3191540a2c9e0713f7299 Mon Sep 17 00:00:00 2001 |
| From: Krzysztof Kozlowski <krzk@kernel.org> |
| Date: Thu, 14 Mar 2019 21:02:17 +0100 |
| Subject: [PATCH] ARM: dts: exynos: Always enable necessary APIO_1V8 and |
| ABB_1V8 regulators on Arndale Octa |
| |
| commit 5ab99cf7d5e96e3b727c30e7a8524c976bd3723d upstream. |
| |
| 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: Paul Gortmaker <paul.gortmaker@windriver.com> |
| |
| diff --git a/arch/arm/boot/dts/exynos5420-arndale-octa.dts b/arch/arm/boot/dts/exynos5420-arndale-octa.dts |
| index cdda614e417e..a370857beac0 100644 |
| --- a/arch/arm/boot/dts/exynos5420-arndale-octa.dts |
| +++ b/arch/arm/boot/dts/exynos5420-arndale-octa.dts |
| @@ -106,6 +106,7 @@ |
| regulator-name = "PVDD_APIO_1V8"; |
| regulator-min-microvolt = <1800000>; |
| regulator-max-microvolt = <1800000>; |
| + regulator-always-on; |
| }; |
| |
| ldo3_reg: LDO3 { |
| @@ -144,6 +145,7 @@ |
| regulator-name = "PVDD_ABB_1V8"; |
| regulator-min-microvolt = <1800000>; |
| regulator-max-microvolt = <1800000>; |
| + regulator-always-on; |
| }; |
| |
| ldo9_reg: LDO9 { |
| -- |
| 2.7.4 |
| |
