[PATCH 4/4] arm64: dts: rockchip: force PMIC reset behavior to restart PMU on RK3588 Tiger

[Quentin Schulz]

From: Quentin Schulz <quentin.schulz at cherry.de>

The bootloader for RK3588 Tiger currently forces the PMIC reset behavior
(stored in RST_FUN bitfield in register SYS_CFG3 of the PMIC) to 0b1X
which is incorrect for our devices.

It is required to restart the PMU as otherwise the companion
microcontroller cannot detect the PMIC (and by extension the full
product and main SoC) being rebooted which is an issue as that is used
to reset a few things like the PWM beeper and watchdogs.

Let's add the new rockchip,rst-fun property to make sure the PMIC reset
behavior is the expected one.

Signed-off-by: Quentin Schulz <quentin.schulz at cherry.de>
---
 arch/arm64/boot/dts/rockchip/rk3588-tiger.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588-tiger.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-tiger.dtsi
index c4933a08dd1e3c92f3e0747135faf97c5eeca906..1bb6a3ee7579e30721bd5e36554b409c7a88dd04 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-tiger.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588-tiger.dtsi
@@ -440,6 +440,7 @@ pmic at 0 {
 		vcc13-supply = <&vcc_1v1_nldo_s3>;
 		vcc14-supply = <&vcc_1v1_nldo_s3>;
 		vcca-supply = <&vcc5v0_sys>;
+		rockchip,rst-fun = <0>;
 
 		rk806_dvs1_null: dvs1-null-pins {
 			pins = "gpio_pwrctrl1";

-- 
2.49.0