[PATCH 4/4] arm64: dts: rockchip: put the PMIC into sleep mode in suspend on RK3588 Tiger

[Jakob Unterwurzacher]

From: Jakob Unterwurzacher <jakob.unterwurzacher at cherry.de>

The RK806's PWRCTRL1 pin is connected to the SoC's pmic_sleep1 output,
which the firmware (TF-A) asserts when the SoC enters suspend-to-ram.
It is configured for no function, though, so the PMIC ignores it: all
regulators stay on in suspend and the regulator-state-mem settings have
no effect.

Configure the pin for the sleep function instead, like other RK806
boards do.

Measured on RK3588 Tiger on Haikou, suspend-to-ram with the logic
domain powered off by the firmware, module supply current (5 V):

  PMIC pin with no function: 0.218 A (1.09 W)
  PMIC pin with sleep function: 0.086 A (0.43 W)
---
 arch/arm64/boot/dts/rockchip/rk3588-tiger.dtsi | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588-tiger.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-tiger.dtsi
index 161c89c62bcda..592a2d11b36b9 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-tiger.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588-tiger.dtsi
@@ -471,7 +471,7 @@ pmic at 0 {
 		gpio-controller;
 		#gpio-cells = <2>;
 		pinctrl-names = "default";
-		pinctrl-0 = <&pmic_pins>, <&rk806_dvs1_null>,
+		pinctrl-0 = <&pmic_pins>, <&rk806_dvs1_slp>,
 			    <&rk806_dvs2_null>, <&rk806_dvs3_null>;
 		spi-max-frequency = <1000000>;
 		system-power-controller;
@@ -492,9 +492,9 @@ pmic at 0 {
 		vcca-supply = <&vcc5v0_sys>;
 		rockchip,reset-mode = <RK806_RESTART>;
 
-		rk806_dvs1_null: dvs1-null-pins {
+		rk806_dvs1_slp: dvs1-slp-pins {
 			pins = "gpio_pwrctrl1";
-			function = "pin_fun0";
+			function = "pin_fun1";
 		};
 
 		rk806_dvs2_null: dvs2-null-pins {

-- 
2.47.3