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Message-ID: <20250425132727.5160-9-linux.amoon@gmail.com>
Date: Fri, 25 Apr 2025 18:56:28 +0530
From: Anand Moon <linux.amoon@...il.com>
To: Chanwoo Choi <cw00.choi@...sung.com>,
Krzysztof Kozlowski <krzk@...nel.org>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>,
Rob Herring <robh@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Alim Akhtar <alim.akhtar@...sung.com>,
linux-kernel@...r.kernel.org (open list:MAXIM PMIC AND MUIC DRIVERS FOR EXYNOS BASED BO...),
linux-clk@...r.kernel.org (open list:COMMON CLK FRAMEWORK),
devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS),
linux-arm-kernel@...ts.infradead.org (moderated list:ARM/SAMSUNG S3C, S5P AND EXYNOS ARM ARCHITECTURES),
linux-samsung-soc@...r.kernel.org (open list:ARM/SAMSUNG S3C, S5P AND EXYNOS ARM ARCHITECTURES)
Cc: Anand Moon <linux.amoon@...il.com>
Subject: [PATCH v1 08/10] ARM: dts: exynos: Add proper regulator states for suspend-to-mem for Exyno5250 smdk5250
The MAX77686 PMCI is able to power down and up key core supplies and other
voltage rails via PWRREQ signal to enter / exit (deep) sleep mode.
PWRREQ status is ignored during initial power up and down processes.
All programming must be done before the AP enterns the sleep mode by
pulling PWRREQ low since the AP does not have programming capability
in (deep) sleep mode.
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 (stand by mode).
Regulators which can be turned off during system suspend:
-LDOn : 2, 6-8, 10-12, 14-16,
-BUCKn : 1-4.
Use standard regulator bindings for it ('regulator-off-in-suspend').
Signed-off-by: Anand Moon <linux.amoon@...il.com>
---
.../boot/dts/samsung/exynos5250-smdk5250.dts | 56 +++++++++++++++++++
1 file changed, 56 insertions(+)
diff --git a/arch/arm/boot/dts/samsung/exynos5250-smdk5250.dts b/arch/arm/boot/dts/samsung/exynos5250-smdk5250.dts
index d41409019671..866e56915a2a 100644
--- a/arch/arm/boot/dts/samsung/exynos5250-smdk5250.dts
+++ b/arch/arm/boot/dts/samsung/exynos5250-smdk5250.dts
@@ -165,6 +165,10 @@ ldo2_reg: LDO2 {
regulator-min-microvolt = <1200000>;
regulator-max-microvolt = <1200000>;
regulator-always-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};
ldo3_reg: LDO3 {
@@ -191,6 +195,10 @@ ldo6_reg: LDO6 {
regulator-min-microvolt = <1100000>;
regulator-max-microvolt = <1100000>;
regulator-always-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};
ldo7_reg: LDO7 {
@@ -198,12 +206,20 @@ ldo7_reg: LDO7 {
regulator-min-microvolt = <1100000>;
regulator-max-microvolt = <1100000>;
regulator-always-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};
ldo8_reg: LDO8 {
regulator-name = "P1.0V_LDO_OUT8";
regulator-min-microvolt = <1000000>;
regulator-max-microvolt = <1000000>;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};
ldo10_reg: LDO10 {
@@ -211,18 +227,30 @@ ldo10_reg: LDO10 {
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-always-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};
ldo11_reg: LDO11 {
regulator-name = "P1.8V_LDO_OUT11";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};
ldo12_reg: LDO12 {
regulator-name = "P3.0V_LDO_OUT12";
regulator-min-microvolt = <3000000>;
regulator-max-microvolt = <3000000>;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};
ldo13_reg: LDO13 {
@@ -235,18 +263,30 @@ ldo14_reg: LDO14 {
regulator-name = "P1.8V_LDO_OUT14";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};
ldo15_reg: LDO15 {
regulator-name = "P1.0V_LDO_OUT15";
regulator-min-microvolt = <1000000>;
regulator-max-microvolt = <1000000>;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};
ldo16_reg: LDO16 {
regulator-name = "P1.8V_LDO_OUT16";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};
buck1_reg: BUCK1 {
@@ -255,6 +295,10 @@ buck1_reg: BUCK1 {
regulator-max-microvolt = <1300000>;
regulator-always-on;
regulator-boot-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};
buck2_reg: BUCK2 {
@@ -263,6 +307,10 @@ buck2_reg: BUCK2 {
regulator-max-microvolt = <1350000>;
regulator-always-on;
regulator-boot-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};
buck3_reg: BUCK3 {
@@ -271,6 +319,10 @@ buck3_reg: BUCK3 {
regulator-max-microvolt = <1200000>;
regulator-always-on;
regulator-boot-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};
buck4_reg: BUCK4 {
@@ -279,6 +331,10 @@ buck4_reg: BUCK4 {
regulator-max-microvolt = <1300000>;
regulator-always-on;
regulator-boot-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};
buck5_reg: BUCK5 {
--
2.49.0
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