ARM: dts: BCM5301X: Describe Northstar pins mux controller

This describes hardware & will allow referencing pin functions. The
first usage is UART1 which allows supporting devices using it.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

arch/arm/boot/dts/bcm5301x.dtsi

@@ -37,6 +37,8 @@ uart1: serial@400 {
 			reg = <0x0400 0x100>;
 			interrupts = <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&iprocslow>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinmux_uart1>;
 			status = "disabled";
 		};
 	};
@@ -391,6 +393,48 @@ i2c0: i2c@18009000 {
 		status = "disabled";
 	};
 
+	dmu@1800c000 {
+		compatible = "simple-bus";
+		ranges = <0 0x1800c000 0x1000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		cru@100 {
+			compatible = "simple-bus";
+			reg = <0x100 0x1a4>;
+			ranges;
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			pin-controller@1c0 {
+				compatible = "brcm,bcm4708-pinmux";
+				reg = <0x1c0 0x24>;
+				reg-names = "cru_gpio_control";
+
+				spi-pins {
+					groups = "spi_grp";
+					function = "spi";
+				};
+
+				i2c {
+					groups = "i2c_grp";
+					function = "i2c";
+				};
+
+				pwm {
+					groups = "pwm0_grp", "pwm1_grp",
+						 "pwm2_grp", "pwm3_grp";
+					function = "pwm";
+				};
+
+				pinmux_uart1: uart1 {
+					groups = "uart1_grp";
+					function = "uart1";
+				};
+			};
+		};
+	};
+
 	lcpll0: lcpll0@1800c100 {
 		#clock-cells = <1>;
 		compatible = "brcm,nsp-lcpll0";