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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
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‎arch/arm/boot/dts/Makefile

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ifeq ($(CONFIG_OF),y)
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dtb-$(CONFIG_BCM2708_DT) += bcm2708-rpi-b.dtb
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dtb-$(CONFIG_BCM2708_DT) += bcm2708-rpi-b-plus.dtb
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dtb-$(CONFIG_BCM2708_DT) += bcm2708-rpi-cm.dtb
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dtb-$(CONFIG_BCM2709_DT) += bcm2709-rpi-2-b.dtb
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# Raspberry Pi
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ifeq ($(CONFIG_BCM2708_DT),y)
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RPI_DT_OVERLAYS=y
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endif
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ifeq ($(CONFIG_BCM2709_DT),y)
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RPI_DT_OVERLAYS=y
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endif
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ifeq ($(CONFIG_ARCH_BCM2835),y)
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RPI_DT_OVERLAYS=y
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endif
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dtb-$(CONFIG_ARCH_ALPINE) += \
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alpine-db.dtb
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dtb-$(CONFIG_MACH_ASM9260) += \
@@ -660,7 +676,18 @@ dtb-$(CONFIG_ARCH_MEDIATEK) += \
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mt6592-evb.dtb \
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mt8127-moose.dtb \
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mt8135-evbp1.dtb
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targets += dtbs dtbs_install
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targets += $(dtb-y)
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endif
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always := $(dtb-y)
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clean-files := *.dtb
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# Enable fixups to support overlays on BCM2708 platforms
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ifeq ($(RPI_DT_OVERLAYS),y)
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DTC_FLAGS ?= -@
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endif
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subdir-y += overlays

‎arch/arm/boot/dts/bcm2708-rpi-b-plus.dts

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/dts-v1/;
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/include/ "bcm2708.dtsi"
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/ {
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compatible = "brcm,bcm2708";
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model = "Raspberry Pi Model B+";
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aliases {
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soc = &soc;
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spi0 = &spi0;
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i2c0 = &i2c0;
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i2c1 = &i2c1;
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i2s = &i2s;
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gpio = &gpio;
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intc = &intc;
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leds = &leds;
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audio = &audio;
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sound = &sound;
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uart0 = &uart0;
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uart1 = &uart1;
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clocks = &clocks;
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};
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sound: sound {
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};
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};
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&gpio {
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spi0_pins: spi0_pins {
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brcm,pins = <7 8 9 10 11>;
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brcm,function = <4>; /* alt0 */
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};
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i2c0_pins: i2c0 {
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brcm,pins = <0 1>;
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brcm,function = <4>;
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};
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i2c1_pins: i2c1 {
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brcm,pins = <2 3>;
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brcm,function = <4>;
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};
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i2s_pins: i2s {
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brcm,pins = <18 19 20 21>;
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brcm,function = <4>; /* alt0 */
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};
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};
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&mmc {
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status = "okay";
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bus-width = <4>;
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};
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&fb {
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status = "okay";
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};
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&uart0 {
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status = "okay";
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};
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&spi0 {
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pinctrl-names = "default";
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pinctrl-0 = <&spi0_pins>;
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spidev@0{
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compatible = "spidev";
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reg = <0>; /* CE0 */
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#address-cells = <1>;
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#size-cells = <0>;
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spi-max-frequency = <500000>;
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};
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spidev@1{
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compatible = "spidev";
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reg = <1>; /* CE1 */
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#address-cells = <1>;
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#size-cells = <0>;
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spi-max-frequency = <500000>;
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};
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};
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&i2c0 {
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pinctrl-names = "default";
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pinctrl-0 = <&i2c0_pins>;
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clock-frequency = <100000>;
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};
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&i2c1 {
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pinctrl-names = "default";
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pinctrl-0 = <&i2c1_pins>;
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clock-frequency = <100000>;
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};
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&i2s {
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#sound-dai-cells = <0>;
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pinctrl-names = "default";
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pinctrl-0 = <&i2s_pins>;
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};
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&leds {
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act_led: act {
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label = "led0";
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linux,default-trigger = "mmc0";
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gpios = <&gpio 47 0>;
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};
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pwr_led: pwr {
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label = "led1";
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linux,default-trigger = "input";
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gpios = <&gpio 35 0>;
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};
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};
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/ {
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__overrides__ {
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uart0 = <&uart0>,"status";
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uart0_clkrate = <&clk_uart0>,"clock-frequency:0";
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i2s = <&i2s>,"status";
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spi = <&spi0>,"status";
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i2c0 = <&i2c0>,"status";
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i2c1 = <&i2c1>,"status";
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i2c0_baudrate = <&i2c0>,"clock-frequency:0";
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i2c1_baudrate = <&i2c1>,"clock-frequency:0";
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act_led_gpio = <&act_led>,"gpios:4";
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act_led_activelow = <&act_led>,"gpios:8";
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act_led_trigger = <&act_led>,"linux,default-trigger";
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pwr_led_gpio = <&pwr_led>,"gpios:4";
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pwr_led_activelow = <&pwr_led>,"gpios:8";
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pwr_led_trigger = <&pwr_led>,"linux,default-trigger";
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audio = <&audio>,"status";
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watchdog = <&watchdog>,"status";
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random = <&random>,"status";
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};
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};

‎arch/arm/boot/dts/bcm2708-rpi-b.dts

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/dts-v1/;
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/include/ "bcm2708.dtsi"
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/ {
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compatible = "brcm,bcm2708";
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model = "Raspberry Pi Model B";
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aliases {
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soc = &soc;
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spi0 = &spi0;
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i2c0 = &i2c0;
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i2c1 = &i2c1;
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i2s = &i2s;
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gpio = &gpio;
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intc = &intc;
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leds = &leds;
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audio = &audio;
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sound = &sound;
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uart0 = &uart0;
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uart1 = &uart1;
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clocks = &clocks;
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};
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sound: sound {
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};
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};
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&gpio {
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spi0_pins: spi0_pins {
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brcm,pins = <7 8 9 10 11>;
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brcm,function = <4>; /* alt0 */
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};
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i2c0_pins: i2c0 {
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brcm,pins = <0 1>;
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brcm,function = <4>;
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};
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i2c1_pins: i2c1 {
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brcm,pins = <2 3>;
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brcm,function = <4>;
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};
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i2s_pins: i2s {
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brcm,pins = <28 29 30 31>;
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brcm,function = <4>; /* alt0 */
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};
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};
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&mmc {
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status = "okay";
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bus-width = <4>;
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};
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&fb {
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status = "okay";
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};
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&uart0 {
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status = "okay";
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};
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&spi0 {
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pinctrl-names = "default";
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pinctrl-0 = <&spi0_pins>;
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spidev@0{
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compatible = "spidev";
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reg = <0>; /* CE0 */
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#address-cells = <1>;
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#size-cells = <0>;
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spi-max-frequency = <500000>;
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};
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spidev@1{
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compatible = "spidev";
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reg = <1>; /* CE1 */
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#address-cells = <1>;
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#size-cells = <0>;
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spi-max-frequency = <500000>;
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};
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};
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&i2c0 {
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pinctrl-names = "default";
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pinctrl-0 = <&i2c0_pins>;
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clock-frequency = <100000>;
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};
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&i2c1 {
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pinctrl-names = "default";
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pinctrl-0 = <&i2c1_pins>;
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clock-frequency = <100000>;
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};
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&i2s {
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#sound-dai-cells = <0>;
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pinctrl-names = "default";
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pinctrl-0 = <&i2s_pins>;
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};
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&leds {
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act_led: act {
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label = "led0";
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linux,default-trigger = "mmc0";
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gpios = <&gpio 16 1>;
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};
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};
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/ {
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__overrides__ {
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uart0 = <&uart0>,"status";
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uart0_clkrate = <&clk_uart0>,"clock-frequency:0";
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i2s = <&i2s>,"status";
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spi = <&spi0>,"status";
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i2c0 = <&i2c0>,"status";
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i2c1 = <&i2c1>,"status";
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i2c0_baudrate = <&i2c0>,"clock-frequency:0";
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i2c1_baudrate = <&i2c1>,"clock-frequency:0";
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act_led_gpio = <&act_led>,"gpios:4";
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act_led_activelow = <&act_led>,"gpios:8";
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act_led_trigger = <&act_led>,"linux,default-trigger";
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audio = <&audio>,"status";
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watchdog = <&watchdog>,"status";
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random = <&random>,"status";
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};
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};

‎arch/arm/boot/dts/bcm2708-rpi-cm.dts

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/dts-v1/;
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/include/ "bcm2708-rpi-cm.dtsi"
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/ {
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model = "Raspberry Pi Compute Module";
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};
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&uart0 {
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status = "okay";
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};
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/ {
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__overrides__ {
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uart0 = <&uart0>,"status";
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uart0_clkrate = <&clk_uart0>,"clock-frequency:0";
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};
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};

‎arch/arm/boot/dts/bcm2708-rpi-cm.dtsi

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/include/ "bcm2708.dtsi"
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/ {
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aliases {
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soc = &soc;
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spi0 = &spi0;
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i2c0 = &i2c0;
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i2c1 = &i2c1;
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i2s = &i2s;
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gpio = &gpio;
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intc = &intc;
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leds = &leds;
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audio = &audio;
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sound = &sound;
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uart0 = &uart0;
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uart1 = &uart1;
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clocks = &clocks;
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};
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sound: sound {
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};
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};
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&leds {
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act_led: act {
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label = "led0";
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linux,default-trigger = "mmc0";
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gpios = <&gpio 47 0>;
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};
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};
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&mmc {
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status = "okay";
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bus-width = <4>;
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};
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&fb {
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status = "okay";
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};
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&audio {
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status = "okay";
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};
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/ {
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__overrides__ {
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act_led_gpio = <&act_led>,"gpios:4";
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act_led_activelow = <&act_led>,"gpios:8";
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act_led_trigger = <&act_led>,"linux,default-trigger";
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};
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};

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