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Subject[PATCH v3] ARM: dts: exynos: Add regulator suspend configuration to Odroid XU3/XU4/HC1 family
Date
Add the PMIC regulator suspend configuration to entire Odroid
XU3/XU4/HC1 family of boards to reduce power usage during suspend. The
configuration is based on vendor (Hardkernel) reference kernel with
additional buck9 suspend configuration (for USB hub suspend and proper
reset).

Energy consumption measurements from Marek Szyprowski during suspend to
RAM:
- all at 5 V power supply,
- before: next-20190620,
- after: next-20190620 + this patch + suspend configuration for s2mps11
regulator driver,

Board | before [mA] | after [mA] |
Odroid HC1 | 120 | 7-10 |
Odroid XU4, sdcard | 88 | 6-9 |
Odroid XU4, eMMC | 100 | 6-9 |

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Anand Moon <linux.amoon@gmail.com>

---

Tested on XU3 and HC1 with SD card.

---

Changes since v2:
1. Suspend also buck9, as suggested by Anand.
2. Add Anand's tag.

Changes since v1:
1. Add Marek's tag.
---
arch/arm/boot/dts/exynos5422-odroid-core.dtsi | 96 +++++++++++++++++++
1 file changed, 96 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5422-odroid-core.dtsi b/arch/arm/boot/dts/exynos5422-odroid-core.dtsi
index 0f967259ad29..9843d21d6924 100644
--- a/arch/arm/boot/dts/exynos5422-odroid-core.dtsi
+++ b/arch/arm/boot/dts/exynos5422-odroid-core.dtsi
@@ -177,6 +177,10 @@
regulator-name = "vdd_adc";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

ldo5_reg: LDO5 {
@@ -184,6 +188,10 @@
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-always-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

ldo6_reg: LDO6 {
@@ -191,6 +199,10 @@
regulator-min-microvolt = <1000000>;
regulator-max-microvolt = <1000000>;
regulator-always-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

ldo7_reg: LDO7 {
@@ -198,6 +210,10 @@
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-always-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

ldo8_reg: LDO8 {
@@ -205,6 +221,10 @@
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-always-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

ldo9_reg: LDO9 {
@@ -212,6 +232,10 @@
regulator-min-microvolt = <3000000>;
regulator-max-microvolt = <3000000>;
regulator-always-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

ldo10_reg: LDO10 {
@@ -219,6 +243,10 @@
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-always-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

ldo11_reg: LDO11 {
@@ -226,6 +254,10 @@
regulator-min-microvolt = <1000000>;
regulator-max-microvolt = <1000000>;
regulator-always-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

ldo12_reg: LDO12 {
@@ -239,6 +271,10 @@
regulator-name = "vddq_mmc2";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <2800000>;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

ldo14_reg: LDO14 {
@@ -253,6 +289,10 @@
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

ldo16_reg: LDO16 {
@@ -267,18 +307,30 @@
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

ldo18_reg: LDO18 {
regulator-name = "vdd_emmc_1V8";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

ldo19_reg: LDO19 {
regulator-name = "vdd_sd";
regulator-min-microvolt = <2800000>;
regulator-max-microvolt = <2800000>;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

ldo20_reg: LDO20 {
@@ -307,6 +359,10 @@
regulator-min-microvolt = <1100000>;
regulator-max-microvolt = <1100000>;
regulator-always-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

ldo24_reg: LDO24 {
@@ -328,6 +384,10 @@
regulator-name = "vdd_ldo26";
regulator-min-microvolt = <800000>;
regulator-max-microvolt = <3950000>;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

ldo27_reg: LDO27 {
@@ -335,6 +395,10 @@
regulator-min-microvolt = <1000000>;
regulator-max-microvolt = <1000000>;
regulator-always-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

ldo28_reg: LDO28 {
@@ -342,6 +406,10 @@
regulator-name = "vdd_ldo28";
regulator-min-microvolt = <800000>;
regulator-max-microvolt = <3950000>;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

ldo29_reg: LDO29 {
@@ -420,6 +488,10 @@
regulator-max-microvolt = <1300000>;
regulator-always-on;
regulator-boot-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

buck2_reg: BUCK2 {
@@ -428,6 +500,10 @@
regulator-max-microvolt = <1500000>;
regulator-always-on;
regulator-boot-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

buck3_reg: BUCK3 {
@@ -436,6 +512,10 @@
regulator-max-microvolt = <1400000>;
regulator-always-on;
regulator-boot-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

buck4_reg: BUCK4 {
@@ -444,6 +524,10 @@
regulator-max-microvolt = <1400000>;
regulator-always-on;
regulator-boot-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

buck5_reg: BUCK5 {
@@ -460,6 +544,10 @@
regulator-max-microvolt = <1500000>;
regulator-always-on;
regulator-boot-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

buck7_reg: BUCK7 {
@@ -484,12 +572,20 @@
regulator-max-microvolt = <3750000>;
regulator-always-on;
regulator-boot-on;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};

buck10_reg: BUCK10 {
regulator-name = "vdd_vmem";
regulator-min-microvolt = <2850000>;
regulator-max-microvolt = <2850000>;
+
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
};
};
};
--
2.17.1
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