Subject: [RFC 1/2] ARM: dts: exynos: Add proper regulator states for suspend-to-mem for odroid-u3

From: Anand Moon <[email-masked]>
Date: Wed, 13 Feb 2019 21:40:51 +0000

Add suspend-to-mem node to regulator core to be enabled or disabled
during system suspend and also support changing the regulator operating
mode during runtime and when the system enter sleep mode.

Cc: Marek Szyprowski <[email-masked]>
Cc: Krzysztof Kozlowski <[email-masked]>
Cc: Chanwoo Choi <[email-masked]>
Signed-off-by: Anand Moon <[email-masked]>
---

Changes from previos patch
[0] https://patchwork.kernel.org/patch/10712549/

Set all the WAKEUP source regulator in suspend-on state.
LD04, LD012, LD015, LD020, LD022
Set all the non used regulator in suspend-odd state
LD02, LD03, LD05, LD06, LD07, LD011, LD013, LDO14, LD016

BUCK5, BUCK6, BUCK7 and not confirable as per driver max77686-regulator

Tested on microSD card and it resumes correcly after suspend.
eMMC is not able to resume after entering into suspend state,
which need to be investigated and how to debug more.
---
 .../boot/dts/exynos4412-odroid-common.dtsi    | 63 +++++++++++++++++++
 arch/arm/boot/dts/exynos4412-odroidu3.dts     |  3 +
 2 files changed, 66 insertions(+)

diff --git a/arch/arm/boot/dts/exynos4412-odroid-common.dtsi b/arch/arm/boot/dts/exynos4412-odroid-common.dtsi
index 08d3a0a7b4eb..e984461c37d9 100644
--- a/arch/arm/boot/dts/exynos4412-odroid-common.dtsi
+++ b/arch/arm/boot/dts/exynos4412-odroid-common.dtsi
@@ -288,6 +288,9 @@
 				regulator-min-microvolt = <1800000>;
 				regulator-max-microvolt = <1800000>;
 				regulator-always-on;
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
 			};
 
 			ldo3_reg: LDO3 {
@@ -295,6 +298,9 @@
 				regulator-min-microvolt = <1800000>;
 				regulator-max-microvolt = <1800000>;
 				regulator-always-on;
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
 			};
 
 			ldo4_reg: LDO4 {
@@ -302,6 +308,9 @@
 				regulator-min-microvolt = <2800000>;
 				regulator-max-microvolt = <2800000>;
 				regulator-boot-on;
+				regulator-state-mem {
+					regulator-on-in-suspend;
+				};
 			};
 
 			ldo5_reg: LDO5 {
@@ -310,6 +319,9 @@
 				regulator-max-microvolt = <1800000>;
 				regulator-always-on;
 				regulator-boot-on;
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
 			};
 
 			ldo6_reg: LDO6 {
@@ -317,6 +329,9 @@
 				regulator-min-microvolt = <1000000>;
 				regulator-max-microvolt = <1000000>;
 				regulator-always-on;
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
 			};
 
 			ldo7_reg: LDO7 {
@@ -324,18 +339,27 @@
 				regulator-min-microvolt = <1000000>;
 				regulator-max-microvolt = <1000000>;
 				regulator-always-on;
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
 			};
 
 			ldo8_reg: LDO8 {
 				regulator-name = "VDD10_HDMI_1.0V";
 				regulator-min-microvolt = <1000000>;
 				regulator-max-microvolt = <1000000>;
+				regulator-state-mem {
+					regulator-on-in-suspend;
+				};
 			};
 
 			ldo10_reg: LDO10 {
 				regulator-name = "VDDQ_MIPIHSI_1.8V";
 				regulator-min-microvolt = <1800000>;
 				regulator-max-microvolt = <1800000>;
+				regulator-state-mem {
+					regulator-on-in-suspend;
+				};
 			};
 
 			ldo11_reg: LDO11 {
@@ -343,6 +367,9 @@
 				regulator-min-microvolt = <1800000>;
 				regulator-max-microvolt = <1800000>;
 				regulator-always-on;
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
 			};
 
 			ldo12_reg: LDO12 {
@@ -351,6 +378,9 @@
 				regulator-max-microvolt = <3300000>;
 				regulator-always-on;
 				regulator-boot-on;
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
 			};
 
 			ldo13_reg: LDO13 {
@@ -359,6 +389,9 @@
 				regulator-max-microvolt = <1800000>;
 				regulator-always-on;
 				regulator-boot-on;
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
 			};
 
 			ldo14_reg: LDO14 {
@@ -367,6 +400,9 @@
 				regulator-max-microvolt = <1800000>;
 				regulator-always-on;
 				regulator-boot-on;
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
 			};
 
 			ldo15_reg: LDO15 {
@@ -375,6 +411,9 @@
 				regulator-max-microvolt = <1000000>;
 				regulator-always-on;
 				regulator-boot-on;
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
 			};
 
 			ldo16_reg: LDO16 {
@@ -383,6 +422,9 @@
 				regulator-max-microvolt = <1800000>;
 				regulator-always-on;
 				regulator-boot-on;
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
 			};
 
 			ldo20_reg: LDO20 {
@@ -396,6 +438,9 @@
 				regulator-min-microvolt = <2800000>;
 				regulator-max-microvolt = <2800000>;
 				regulator-boot-on;
+				regulator-state-mem {
+					regulator-on-in-suspend;
+				};
 			};
 
 			ldo22_reg: LDO22 {
@@ -405,6 +450,9 @@
 				 */
 				regulator-name = "LDO22";
 				regulator-boot-on;
+				regulator-state-mem {
+					regulator-on-in-suspend;
+				};
 			};
 
 			ldo25_reg: LDO25 {
@@ -413,6 +461,9 @@
 				regulator-max-microvolt = <1800000>;
 				regulator-always-on;
 				regulator-boot-on;
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
 			};
 
 			buck1_reg: BUCK1 {
@@ -421,6 +472,9 @@
 				regulator-max-microvolt = <1100000>;
 				regulator-always-on;
 				regulator-boot-on;
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
 			};
 
 			buck2_reg: BUCK2 {
@@ -429,6 +483,9 @@
 				regulator-max-microvolt = <1350000>;
 				regulator-always-on;
 				regulator-boot-on;
+				regulator-state-mem {
+					regulator-on-in-suspend;
+				};
 			};
 
 			buck3_reg: BUCK3 {
@@ -437,6 +494,9 @@
 				regulator-max-microvolt = <1050000>;
 				regulator-always-on;
 				regulator-boot-on;
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
 			};
 
 			buck4_reg: BUCK4 {
@@ -444,6 +504,9 @@
 				regulator-min-microvolt = <900000>;
 				regulator-max-microvolt = <1100000>;
 				regulator-microvolt-offset = <50000>;
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
 			};
 
 			buck5_reg: BUCK5 {
diff --git a/arch/arm/boot/dts/exynos4412-odroidu3.dts b/arch/arm/boot/dts/exynos4412-odroidu3.dts
index 2bdf899df436..4ebde09fc51d 100644
--- a/arch/arm/boot/dts/exynos4412-odroidu3.dts
+++ b/arch/arm/boot/dts/exynos4412-odroidu3.dts
@@ -82,6 +82,9 @@
 	regulator-name = "LDO22_VDDQ_MMC4_2.8V";
 	regulator-min-microvolt = <2800000>;
 	regulator-max-microvolt = <2800000>;
+	regulator-state-mem {
+		regulator-on-in-suspend;
+	};
 };
 
 &mshc_0 {
-- 
2.20.1

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