Add support for power supplies

Requires updating the kernel with a driver for the power supplies. The
current linux tree can be found in cesnet/2021-05-14.

Depends-on: https://cesnet-gerrit-czechlight/c/CzechLight/velia/+/4188
Depends-on: https://gerrit.cesnet.cz/c/CzechLight/velia/+/4188
Change-Id: I57f426feaf48a72b5b95c961e45f90323777d685
diff --git a/board/czechlight/clearfog/sdn-roadm-clearfog.dtsi b/board/czechlight/clearfog/sdn-roadm-clearfog.dtsi
index 32255a3..6a8715a 100644
--- a/board/czechlight/clearfog/sdn-roadm-clearfog.dtsi
+++ b/board/czechlight/clearfog/sdn-roadm-clearfog.dtsi
@@ -22,7 +22,7 @@
 		};
 	};
 
-	gpio_i2c {
+	gpio_i2c: gpio_i2c {
 		compatible = "i2c-gpio";
 		sda-gpios = <&gpio0 25 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
 		scl-gpios = <&gpio0 24 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
@@ -34,6 +34,13 @@
 	};
 };
 
+&gpio_i2c {
+	pdu@25 {
+		compatible = "fsp,yh5151e";
+		reg = <0x25>;
+	};
+};
+
 &pinctrl {
 	uart1_pins_i2c_bb: uart1-pins-i2c-bb {
 		marvell,pins = "mpp24", "mpp25";