ARM: bcm283x: Define UART pinmuxing on board level

Until RPI 3 and Zero W the pl011 (uart0) was always on pin 14/15. So in
order to take care of them and other boards in the future,
we need to define UART pinmuxing on board level.

This work based on Eric Anholt's patch "ARM: bcm2385: Don't force pl011
onto pins 14/15." and Fabian Vogt's patch "ARM64: dts: bcm2837: assign
uart0 to BT and uart1 to pin headers".
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Eric Anholt <eric@anholt.net>

arch/arm/boot/dts/bcm2835-rpi-a-plus.dts

@@ -99,3 +99,9 @@ i2s_alt0: i2s_alt0 {
 &hdmi {
 	hpd-gpios = <&gpio 46 GPIO_ACTIVE_LOW>;
 };
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_gpio14>;
+	status = "okay";
+};

arch/arm/boot/dts/bcm2835-rpi-a.dts

@@ -94,3 +94,9 @@ i2s_alt2: i2s_alt2 {
 &hdmi {
 	hpd-gpios = <&gpio 46 GPIO_ACTIVE_HIGH>;
 };
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_gpio14>;
+	status = "okay";
+};

arch/arm/boot/dts/bcm2835-rpi-b-plus.dts

@@ -101,3 +101,9 @@ i2s_alt0: i2s_alt0 {
 &hdmi {
 	hpd-gpios = <&gpio 46 GPIO_ACTIVE_LOW>;
 };
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_gpio14>;
+	status = "okay";
+};

arch/arm/boot/dts/bcm2835-rpi-b-rev2.dts

@@ -94,3 +94,9 @@ i2s_alt2: i2s_alt2 {
 &hdmi {
 	hpd-gpios = <&gpio 46 GPIO_ACTIVE_LOW>;
 };
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_gpio14>;
+	status = "okay";
+};

arch/arm/boot/dts/bcm2835-rpi-b.dts

@@ -89,3 +89,9 @@ &gpio {
 &hdmi {
 	hpd-gpios = <&gpio 46 GPIO_ACTIVE_HIGH>;
 };
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_gpio14>;
+	status = "okay";
+};

arch/arm/boot/dts/bcm2835-rpi-zero.dts

@@ -103,3 +103,9 @@ i2s_alt0: i2s_alt0 {
 &hdmi {
 	hpd-gpios = <&gpio 46 GPIO_ACTIVE_LOW>;
 };
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_gpio14>;
+	status = "okay";
+};

arch/arm/boot/dts/bcm2835-rpi.dtsi

@@ -39,7 +39,7 @@ gpioout: gpioout {
 	};
 
 	alt0: alt0 {
-		brcm,pins = <4 5 7 8 9 10 11 14 15>;
+		brcm,pins = <4 5 7 8 9 10 11>;
 		brcm,function = <BCM2835_FSEL_ALT0>;
 	};
 };

arch/arm/boot/dts/bcm2836-rpi-2-b.dts

@@ -39,3 +39,9 @@ i2s_alt0: i2s_alt0 {
 &hdmi {
 	hpd-gpios = <&gpio 46 GPIO_ACTIVE_LOW>;
 };
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_gpio14>;
+	status = "okay";
+};

arch/arm/boot/dts/bcm2837-rpi-3-b.dts

@@ -19,7 +19,17 @@ act {
 	};
 };
 
+/* uart0 communicates with the BT module */
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_gpio32 &gpclk2_gpio43>;
+	status = "okay";
+};
+
+/* uart1 is mapped to the pin header */
 &uart1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart1_gpio14>;
 	status = "okay";
 };