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Commit | Line | Data |
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bb104d9e SL |
1 | From d0236dda0d91a6aa934ca709198ad49d339dd82e 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 9cc83c51c925..e664c33c3c64 100644 | |
32 | --- a/arch/arm/boot/dts/exynos5420-arndale-octa.dts | |
33 | +++ b/arch/arm/boot/dts/exynos5420-arndale-octa.dts | |
34 | @@ -110,6 +110,7 @@ | |
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 | @@ -148,6 +149,7 @@ | |
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 |