[PATCH v8 4/4] ARM: dts: add suspend voltage setting for RK808

[Chris Zhong <zyw@rock-chips.com>]

global_pwroff would be pull to high when RK3288 entering suspend,
this pin is a sleep signal for RK808, so RK808 could goto sleep
mode, and some regulators would be disable.

Signed-off-by: Chris Zhong <zyw@rock-chips.com>

---

Changes in v8:
- keep all except cpu&tp power rail on during suspend
- add regulator-on-in-suspend before set suspend voltage
- add a reference of ddrio_pwroff and ddr0_retention

Changes in v7:
- add regulator-state-mem sub node for suspend

Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2: None

 arch/arm/boot/dts/rk3288-evb-rk808.dts | 55 +++++++++++++++++++++++++++++++++-
 arch/arm/boot/dts/rk3288-evb.dtsi      | 12 ++++++++
 2 files changed, 66 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/rk3288-evb-rk808.dts b/arch/arm/boot/dts/rk3288-evb-rk808.dts
index d8c775e6..e4a8884 100644
--- a/arch/arm/boot/dts/rk3288-evb-rk808.dts
+++ b/arch/arm/boot/dts/rk3288-evb-rk808.dts
@@ -31,7 +31,7 @@
 		interrupt-parent = <&gpio0>;
 		interrupts = <4 IRQ_TYPE_LEVEL_LOW>;
 		pinctrl-names = "default";
-		pinctrl-0 = <&pmic_int>;
+		pinctrl-0 = <&pmic_int &global_pwroff>;
 		rockchip,system-power-controller;
 		wakeup-source;
 		#clock-cells = <1>;
@@ -50,6 +50,9 @@
 				regulator-min-microvolt = <750000>;
 				regulator-max-microvolt = <1350000>;
 				regulator-name = "vdd_arm";
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
 			};
 
 			vdd_gpu: DCDC_REG2 {
@@ -58,12 +61,20 @@
 				regulator-min-microvolt = <850000>;
 				regulator-max-microvolt = <1250000>;
 				regulator-name = "vdd_gpu";
+				regulator-state-mem {
+					regulator-on-in-suspend;
+					regulator-suspend-microvolt = <1000000>;
+				};
 			};
 
 			vcc_ddr: DCDC_REG3 {
 				regulator-always-on;
 				regulator-boot-on;
 				regulator-name = "vcc_ddr";
+				regulator-suspend-mem-enabled;
+				regulator-state-mem {
+					regulator-on-in-suspend;
+				};
 			};
 
 			vcc_io: DCDC_REG4 {
@@ -72,6 +83,10 @@
 				regulator-min-microvolt = <3300000>;
 				regulator-max-microvolt = <3300000>;
 				regulator-name = "vcc_io";
+				regulator-state-mem {
+					regulator-on-in-suspend;
+					regulator-suspend-microvolt = <3300000>;
+				};
 			};
 
 			vccio_pmu: LDO_REG1 {
@@ -80,6 +95,10 @@
 				regulator-min-microvolt = <3300000>;
 				regulator-max-microvolt = <3300000>;
 				regulator-name = "vccio_pmu";
+				regulator-state-mem {
+					regulator-on-in-suspend;
+					regulator-suspend-microvolt = <3300000>;
+				};
 			};
 
 			vcc_tp: LDO_REG2 {
@@ -88,6 +107,9 @@
 				regulator-min-microvolt = <3300000>;
 				regulator-max-microvolt = <3300000>;
 				regulator-name = "vcc_tp";
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
 			};
 
 			vdd_10: LDO_REG3 {
@@ -96,6 +118,10 @@
 				regulator-min-microvolt = <1000000>;
 				regulator-max-microvolt = <1000000>;
 				regulator-name = "vdd_10";
+				regulator-state-mem {
+					regulator-on-in-suspend;
+					regulator-suspend-microvolt = <1000000>;
+				};
 			};
 
 			vcc18_lcd: LDO_REG4 {
@@ -104,6 +130,10 @@
 				regulator-min-microvolt = <1800000>;
 				regulator-max-microvolt = <1800000>;
 				regulator-name = "vcc18_lcd";
+				regulator-state-mem {
+					regulator-on-in-suspend;
+					regulator-suspend-microvolt = <1800000>;
+				};
 			};
 
 			vccio_sd: LDO_REG5 {
@@ -112,6 +142,10 @@
 				regulator-min-microvolt = <1800000>;
 				regulator-max-microvolt = <3300000>;
 				regulator-name = "vccio_sd";
+				regulator-state-mem {
+					regulator-on-in-suspend;
+					regulator-suspend-microvolt = <3300000>;
+				};
 			};
 
 			vdd10_lcd: LDO_REG6 {
@@ -120,6 +154,10 @@
 				regulator-min-microvolt = <1000000>;
 				regulator-max-microvolt = <1000000>;
 				regulator-name = "vdd10_lcd";
+				regulator-state-mem {
+					regulator-on-in-suspend;
+					regulator-suspend-microvolt = <1000000>;
+				};
 			};
 
 			vcc_18: LDO_REG7 {
@@ -128,6 +166,11 @@
 				regulator-min-microvolt = <1800000>;
 				regulator-max-microvolt = <1800000>;
 				regulator-name = "vcc_18";
+				regulator-suspend-mem-microvolt = <1800000>;
+				regulator-state-mem {
+					regulator-on-in-suspend;
+					regulator-suspend-microvolt = <1800000>;
+				};
 			};
 
 			vcca_codec: LDO_REG8 {
@@ -136,18 +179,28 @@
 				regulator-min-microvolt = <3300000>;
 				regulator-max-microvolt = <3300000>;
 				regulator-name = "vcca_codec";
+				regulator-state-mem {
+					regulator-on-in-suspend;
+					regulator-suspend-microvolt = <3300000>;
+				};
 			};
 
 			vcc_wl: SWITCH_REG1 {
 				regulator-always-on;
 				regulator-boot-on;
 				regulator-name = "vcc_wl";
+				regulator-state-mem {
+					regulator-on-in-suspend;
+				};
 			};
 
 			vcc_lcd: SWITCH_REG2 {
 				regulator-always-on;
 				regulator-boot-on;
 				regulator-name = "vcc_lcd";
+				regulator-state-mem {
+					regulator-on-in-suspend;
+				};
 			};
 		};
 	};
diff --git a/arch/arm/boot/dts/rk3288-evb.dtsi b/arch/arm/boot/dts/rk3288-evb.dtsi
index cb83cea..8d90fab 100644
--- a/arch/arm/boot/dts/rk3288-evb.dtsi
+++ b/arch/arm/boot/dts/rk3288-evb.dtsi
@@ -149,6 +149,18 @@
 };
 
 &pinctrl {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <
+		/* Common for sleep and wake, but no owners */
+		&ddr0_retention
+		&ddrio_pwroff
+	>;
+	pinctrl-1 = <
+		/* Common for sleep and wake, but no owners */
+		&ddr0_retention
+		&ddrio_pwroff
+	>;
+
 	backlight {
 		bl_en: bl-en {
 			rockchip,pins = <7 2 RK_FUNC_GPIO &pcfg_pull_none>;
-- 
1.9.1