12V DCIN regulator is root source supply for the rest of regulators
in Rock960 power diagram.

Add support for it and attach same to supply vcc5v0_sys.

Signed-off-by: Jagan Teki <ja...@amarulasolutions.com>
Signed-off-by: Akash Gajjar <ak...@openedev.com>
---
 arch/arm64/boot/dts/rockchip/rk3399-rock960.dtsi | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rock960.dtsi 
b/arch/arm64/boot/dts/rockchip/rk3399-rock960.dtsi
index a268ec9f6b5e..68ca3bf9ea2f 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-rock960.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-rock960.dtsi
@@ -18,6 +18,15 @@
                reset-gpios = <&gpio0 RK_PB2 GPIO_ACTIVE_LOW>;
        };
 
+       vcc12v_dcin: vcc12v-dcin {
+               compatible = "regulator-fixed";
+               regulator-name = "vcc12v_dcin";
+               regulator-min-microvolt = <12000000>;
+               regulator-max-microvolt = <12000000>;
+               regulator-always-on;
+               regulator-boot-on;
+       };
+
        vcc1v8_s0: vcc1v8-s0 {
                compatible = "regulator-fixed";
                regulator-name = "vcc1v8_s0";
@@ -32,6 +41,7 @@
                regulator-min-microvolt = <5000000>;
                regulator-max-microvolt = <5000000>;
                regulator-always-on;
+               vin-supply = <&vcc12v_dcin>;
        };
 
        vcc3v3_sys: vcc3v3-sys {
-- 
2.18.0.321.gffc6fa0e3

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