[PATCH v2 6/6] arm64: dts: rockchip: fix modem power supply on Photonicat

[Coia Prant]

The vcc3v4_rf regulator supplies the M.2 B-Key 5G modem. It was
incorrectly modeled as being supplied by vccin_5v (the external DC
input). As a result, the modem loses power when the board runs on
battery.

Per the schematic, VCC3V4_RF is actually derived from VCC_SYSON (the
main system power rail after the power switch) via a ferrite bead
(B1). Change the vin-supply of vcc3v4_rf to vcc_syson to match the
hardware topology. This ensures the modem remains powered in both DC
and battery modes.

Link: https://github.com/photonicat/photonicat-hardware/blob/main/Photonicat_rk3568_sch_20221116.pdf (Page 18)
Fixes: ba124e06ce7b ("arm64: dts: rockchip: add dts for Ariaboard Photonicat RK3568")
Signed-off-by: Coia Prant <coiaprant at gmail.com>
---
 arch/arm64/boot/dts/rockchip/rk3568-photonicat.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3568-photonicat.dts b/arch/arm64/boot/dts/rockchip/rk3568-photonicat.dts
index 11ac78acca3be..02d445d7968fe 100644
--- a/arch/arm64/boot/dts/rockchip/rk3568-photonicat.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3568-photonicat.dts
@@ -177,7 +177,7 @@ vcc3v4_rf: regulator-vcc3v4-rf {
 		regulator-name = "vcc3v4_rf";
 		regulator-min-microvolt = <3400000>;
 		regulator-max-microvolt = <3400000>;
-		vin-supply = <&vccin_5v>;
+		vin-supply = <&vcc_syson>;
 	};
 
 	vcc5v0_usb30_otg0: regulator-vcc5v0-usb30-otg0 {
-- 
2.47.3