ARM: dts: meson8: add power domain controller

The Meson8 SoCs have a power domain controller which can turn on/off
various register areas (such as: Ethernet, VPU, etc.).
Add the main "pwrc" controller and configure the Ethernet power domain.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://lore.kernel.org/r/20200620161010.23171-2-martin.blumenstingl@googlemail.com

arch/arm/boot/dts/meson8.dtsi

@@ -6,6 +6,7 @@
 #include <dt-bindings/clock/meson8-ddr-clkc.h>
 #include <dt-bindings/clock/meson8b-clkc.h>
 #include <dt-bindings/gpio/meson8-gpio.h>
+#include <dt-bindings/power/meson8-power.h>
 #include <dt-bindings/reset/amlogic,meson8b-clkc-reset.h>
 #include <dt-bindings/reset/amlogic,meson8b-reset.h>
 #include "meson.dtsi"
@@ -454,6 +455,8 @@
 &ethmac {
 	clocks = <&clkc CLKID_ETH>;
 	clock-names = "stmmaceth";
+
+	power-domains = <&pwrc PWRC_MESON8_ETHERNET_MEM_ID>;
 };
 
 &gpio_intc {
@@ -469,6 +472,16 @@
 		#clock-cells = <1>;
 		#reset-cells = <1>;
 	};
+
+	pwrc: power-controller {
+		compatible = "amlogic,meson8-pwrc";
+		#power-domain-cells = <1>;
+		amlogic,ao-sysctrl = <&pmu>;
+		clocks = <&clkc CLKID_VPU>;
+		clock-names = "vpu";
+		assigned-clocks = <&clkc CLKID_VPU>;
+		assigned-clock-rates = <364285714>;
+	};
 };
 
 &hwrng {