BCM2708: Add core Device Tree support

Add the bare minimum needed to boot BCM2708 from a Device Tree. Signed-off-by: Noralf Tronnes <[email protected]> BCM2708: DT: change 'axi' nodename to 'soc' Change DT node named 'axi' to 'soc' so it matches ARCH_BCM2835. The VC4 bootloader fills in certain properties in the 'axi' subtree, but since this is part of an upstreaming effort, the name is changed. Signed-off-by: Noralf Tronnes [email protected] BCM2708_DT: Correct length of the peripheral space
raspberrypi · Aug 4, 2015 · 25f3e06 · 25f3e06
1 parent 996a96c
commit 25f3e06
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Showing 45 changed files with 3,316 additions and 54 deletions.
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
@@ -1,5 +1,21 @@
 ifeq ($(CONFIG_OF),y)
 
+dtb-$(CONFIG_BCM2708_DT) += bcm2708-rpi-b.dtb
+dtb-$(CONFIG_BCM2708_DT) += bcm2708-rpi-b-plus.dtb
+dtb-$(CONFIG_BCM2708_DT) += bcm2708-rpi-cm.dtb
+dtb-$(CONFIG_BCM2709_DT) += bcm2709-rpi-2-b.dtb
+
+# Raspberry Pi
+ifeq ($(CONFIG_BCM2708_DT),y)
+   RPI_DT_OVERLAYS=y
+endif
+ifeq ($(CONFIG_BCM2709_DT),y)
+   RPI_DT_OVERLAYS=y
+endif
+ifeq ($(CONFIG_ARCH_BCM2835),y)
+   RPI_DT_OVERLAYS=y
+endif
+
 dtb-$(CONFIG_ARCH_ALPINE) += \
 	alpine-db.dtb
 dtb-$(CONFIG_MACH_ASM9260) += \
@@ -660,7 +676,18 @@ dtb-$(CONFIG_ARCH_MEDIATEK) += \
 	mt6592-evb.dtb \
 	mt8127-moose.dtb \
 	mt8135-evbp1.dtb
+
+targets += dtbs dtbs_install
+targets += $(dtb-y)
+
 endif
 
 always		:= $(dtb-y)
 clean-files	:= *.dtb
+
+# Enable fixups to support overlays on BCM2708 platforms
+ifeq ($(RPI_DT_OVERLAYS),y)
+	DTC_FLAGS ?= -@
+endif
+
+subdir-y  += overlays
diff --git a/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts b/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts
@@ -0,0 +1,140 @@
+/dts-v1/;
+
+/include/ "bcm2708.dtsi"
+
+/ {
+	compatible = "brcm,bcm2708";
+	model = "Raspberry Pi Model B+";
+
+	aliases {
+		soc = &soc;
+		spi0 = &spi0;
+		i2c0 = &i2c0;
+		i2c1 = &i2c1;
+		i2s  = &i2s;
+		gpio = &gpio;
+		intc = &intc;
+		leds = &leds;
+		audio = &audio;
+		sound = &sound;
+		uart0 = &uart0;
+		uart1 = &uart1;
+		clocks = &clocks;
+	};
+
+	sound: sound {
+	};
+};
+
+&gpio {
+	spi0_pins: spi0_pins {
+		brcm,pins = <7 8 9 10 11>;
+		brcm,function = <4>; /* alt0 */
+	};
+
+	i2c0_pins: i2c0 {
+		brcm,pins = <0 1>;
+		brcm,function = <4>;
+	};
+
+	i2c1_pins: i2c1 {
+		brcm,pins = <2 3>;
+		brcm,function = <4>;
+	};
+
+	i2s_pins: i2s {
+		brcm,pins = <18 19 20 21>;
+		brcm,function = <4>; /* alt0 */
+	};
+};
+
+&mmc {
+	status = "okay";
+	bus-width = <4>;
+};
+
+&fb {
+	status = "okay";
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&spi0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi0_pins>;
+
+	spidev@0{
+		compatible = "spidev";
+		reg = <0>;	/* CE0 */
+		#address-cells = <1>;
+		#size-cells = <0>;
+		spi-max-frequency = <500000>;
+	};
+
+	spidev@1{
+		compatible = "spidev";
+		reg = <1>;	/* CE1 */
+		#address-cells = <1>;
+		#size-cells = <0>;
+		spi-max-frequency = <500000>;
+	};
+};
+
+&i2c0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c0_pins>;
+	clock-frequency = <100000>;
+};
+
+&i2c1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c1_pins>;
+	clock-frequency = <100000>;
+};
+
+&i2s {
+	#sound-dai-cells = <0>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2s_pins>;
+};
+
+&leds {
+	act_led: act {
+		label = "led0";
+		linux,default-trigger = "mmc0";
+		gpios = <&gpio 47 0>;
+	};
+
+	pwr_led: pwr {
+		label = "led1";
+		linux,default-trigger = "input";
+		gpios = <&gpio 35 0>;
+	};
+};
+
+/ {
+	__overrides__ {
+		uart0 = <&uart0>,"status";
+		uart0_clkrate = <&clk_uart0>,"clock-frequency:0";
+		i2s = <&i2s>,"status";
+		spi = <&spi0>,"status";
+		i2c0 = <&i2c0>,"status";
+		i2c1 = <&i2c1>,"status";
+		i2c0_baudrate = <&i2c0>,"clock-frequency:0";
+		i2c1_baudrate = <&i2c1>,"clock-frequency:0";
+
+		act_led_gpio = <&act_led>,"gpios:4";
+		act_led_activelow = <&act_led>,"gpios:8";
+		act_led_trigger = <&act_led>,"linux,default-trigger";
+
+		pwr_led_gpio = <&pwr_led>,"gpios:4";
+		pwr_led_activelow = <&pwr_led>,"gpios:8";
+		pwr_led_trigger = <&pwr_led>,"linux,default-trigger";
+
+		audio = <&audio>,"status";
+		watchdog = <&watchdog>,"status";
+		random = <&random>,"status";
+	};
+};
diff --git a/arch/arm/boot/dts/bcm2708-rpi-b.dts b/arch/arm/boot/dts/bcm2708-rpi-b.dts
@@ -0,0 +1,130 @@
+/dts-v1/;
+
+/include/ "bcm2708.dtsi"
+
+/ {
+	compatible = "brcm,bcm2708";
+	model = "Raspberry Pi Model B";
+
+	aliases {
+		soc = &soc;
+		spi0 = &spi0;
+		i2c0 = &i2c0;
+		i2c1 = &i2c1;
+		i2s  = &i2s;
+		gpio = &gpio;
+		intc = &intc;
+		leds = &leds;
+		audio = &audio;
+		sound = &sound;
+		uart0 = &uart0;
+		uart1 = &uart1;
+		clocks = &clocks;
+	};
+
+	sound: sound {
+	};
+};
+
+&gpio {
+	spi0_pins: spi0_pins {
+		brcm,pins = <7 8 9 10 11>;
+		brcm,function = <4>; /* alt0 */
+	};
+
+	i2c0_pins: i2c0 {
+		brcm,pins = <0 1>;
+		brcm,function = <4>;
+	};
+
+	i2c1_pins: i2c1 {
+		brcm,pins = <2 3>;
+		brcm,function = <4>;
+	};
+
+	i2s_pins: i2s {
+		brcm,pins = <28 29 30 31>;
+		brcm,function = <4>; /* alt0 */
+	};
+};
+
+&mmc {
+	status = "okay";
+	bus-width = <4>;
+};
+
+&fb {
+	status = "okay";
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&spi0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi0_pins>;
+
+	spidev@0{
+		compatible = "spidev";
+		reg = <0>;	/* CE0 */
+		#address-cells = <1>;
+		#size-cells = <0>;
+		spi-max-frequency = <500000>;
+	};
+
+	spidev@1{
+		compatible = "spidev";
+		reg = <1>;	/* CE1 */
+		#address-cells = <1>;
+		#size-cells = <0>;
+		spi-max-frequency = <500000>;
+	};
+};
+
+&i2c0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c0_pins>;
+	clock-frequency = <100000>;
+};
+
+&i2c1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c1_pins>;
+	clock-frequency = <100000>;
+};
+
+&i2s {
+	#sound-dai-cells = <0>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2s_pins>;
+};
+
+&leds {
+	act_led: act {
+		label = "led0";
+		linux,default-trigger = "mmc0";
+		gpios = <&gpio 16 1>;
+	};
+};
+
+/ {
+	__overrides__ {
+		uart0 = <&uart0>,"status";
+		uart0_clkrate = <&clk_uart0>,"clock-frequency:0";
+		i2s = <&i2s>,"status";
+		spi = <&spi0>,"status";
+		i2c0 = <&i2c0>,"status";
+		i2c1 = <&i2c1>,"status";
+		i2c0_baudrate = <&i2c0>,"clock-frequency:0";
+		i2c1_baudrate = <&i2c1>,"clock-frequency:0";
+
+		act_led_gpio = <&act_led>,"gpios:4";
+		act_led_activelow = <&act_led>,"gpios:8";
+		act_led_trigger = <&act_led>,"linux,default-trigger";
+
+		audio = <&audio>,"status";
+		watchdog = <&watchdog>,"status";
+		random = <&random>,"status";
+	};
+};
diff --git a/arch/arm/boot/dts/bcm2708-rpi-cm.dts b/arch/arm/boot/dts/bcm2708-rpi-cm.dts
@@ -0,0 +1,18 @@
+/dts-v1/;
+
+/include/ "bcm2708-rpi-cm.dtsi"
+
+/ {
+	model = "Raspberry Pi Compute Module";
+};
+
+&uart0 {
+	status = "okay";
+};
+
+/ {
+	__overrides__ {
+		uart0 = <&uart0>,"status";
+		uart0_clkrate = <&clk_uart0>,"clock-frequency:0";
+	};
+};
diff --git a/arch/arm/boot/dts/bcm2708-rpi-cm.dtsi b/arch/arm/boot/dts/bcm2708-rpi-cm.dtsi
@@ -0,0 +1,51 @@
+/include/ "bcm2708.dtsi"
+
+/ {
+	aliases {
+		soc = &soc;
+		spi0 = &spi0;
+		i2c0 = &i2c0;
+		i2c1 = &i2c1;
+		i2s  = &i2s;
+		gpio = &gpio;
+		intc = &intc;
+		leds = &leds;
+		audio = &audio;
+		sound = &sound;
+		uart0 = &uart0;
+		uart1 = &uart1;
+		clocks = &clocks;
+	};
+
+	sound: sound {
+	};
+};
+
+&leds {
+	act_led: act {
+		label = "led0";
+		linux,default-trigger = "mmc0";
+		gpios = <&gpio 47 0>;
+	};
+};
+
+&mmc {
+	status = "okay";
+	bus-width = <4>;
+};
+
+&fb {
+	status = "okay";
+};
+
+&audio {
+	status = "okay";
+};
+
+/ {
+	__overrides__ {
+		act_led_gpio = <&act_led>,"gpios:4";
+		act_led_activelow = <&act_led>,"gpios:8";
+		act_led_trigger = <&act_led>,"linux,default-trigger";
+	};
+};