Define the system 5V fixed regulator (vcc5v0_sys) supplied by the
DC input. As per the schematics, vcc5v0_sys is the input power source
for the VCC5V0_HUB and 5V_VBUS reglators. Update these regulators
to correctly reference vcc5v0_sys as their parent (vin-supply).

Cc: Han Gao <gaohan@iscas.ac.cn>
Cc: Ze Huang <huang.ze@linux.dev>
Cc: Chukun Pan <amadeus@jmu.edu.cn>
Signed-off-by: Anand Moon <linux.amoon@gmail.com>
---
 arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
index 5790d927b93d..9727ecdd9f6b 100644
--- a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
@@ -50,6 +50,16 @@ reg_dc_in: regulator-dc-in-12v {
 		regulator-always-on;
 	};
 
+	reg_vcc5v0_sys: regulator-vcc5v0-sys {
+		compatible = "regulator-fixed";
+		regulator-name = "vcc5v0_sys";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-boot-on;
+		regulator-always-on;
+		vin-supply = <&reg_dc_in>;
+	};
+
 	reg_vcc_4v: regulator-vcc-4v {
 		compatible = "regulator-fixed";
 		regulator-name = "vcc_4v";
@@ -66,6 +76,7 @@ regulator-usb3-vbus-5v {
 		regulator-min-microvolt = <5000000>;
 		regulator-max-microvolt = <5000000>;
 		regulator-always-on;
+		vin-supply = <&reg_vcc5v0_sys>;
 		gpio = <&gpio K1_GPIO(97) GPIO_ACTIVE_HIGH>;
 		enable-active-high;
 	};
@@ -75,6 +86,7 @@ usb3_hub_5v: regulator-usb3-hub-5v {
 		regulator-name = "USB30_HUB";
 		regulator-min-microvolt = <5000000>;
 		regulator-max-microvolt = <5000000>;
+		vin-supply = <&reg_vcc5v0_sys>;
 		gpio = <&gpio K1_GPIO(123) GPIO_ACTIVE_HIGH>;
 		enable-active-high;
 	};
-- 
2.53.0