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

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ARM: add infra-structure for BCM2835 and Raspberry Pi The BCM2835 is an ARM SoC from Broadcom. This patch adds very basic support for this SoC. http://www.broadcom.com/products/BCM2835 http://www.raspberrypi.org/wp-content/uploads/2012/02/BCM2835-ARM-Peripherals.pdf Note that the documentation in the latter .pdf assumes the MMU setup that's used on the "VideoCore" companion processor, and does not document physical peripheral addresses. Subtract 0x5e000000 to obtain the physical addresses. This is accounted for by the ranges property in the /soc node in the device tree. The BCM2835 SoC is used in the Raspberry Pi. This patch also adds a minimal device tree for this board; enough to see some very early kernel boot messages through earlyprintk. However, this patch does not yet provide a useful booting system. http://www.raspberrypi.org/. This patch was extracted from git://github.com/lp0/linux.git branch rpi-split from 3-4 months ago, and significantly stripped down and modified since. Signed-off-by: Chris Boot <bootc@bootc.net> Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Signed-off-by: Dom Cobley <popcornmix@gmail.com> Signed-off-by: Dom Cobley <dc4@broadcom.com> Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> Acked-by: Arnd Bergmann <arnd@arndb.de>
2012-05-26 15:04:43 +08:00
/dts-v1/;
/include/ "bcm2835.dtsi"
/ {
compatible = "raspberrypi,model-b", "brcm,bcm2835";
model = "Raspberry Pi Model B";
memory {
reg = <0 0x10000000>;
};
ARM: bcm2835: Add Raspberry Pi's ACT LED to DT The Raspberry Pi board has one GPIO-controlled LED labeled "ACT". Add it to the DT via the gpio-leds driver, so users can control it from userspace. If CONFIG_LEDS_TRIGGER_HEARTBEAT is set, the LED will also signal some sign of life. The GPIO circuitry is low-active. And as the bootloader may decide to switch the LED on at boot time, the default state is 'keep'. Signed-off-by: Daniel Mack <zonque@gmail.com> Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
2013-04-29 04:49:52 +08:00
leds {
compatible = "gpio-leds";
act {
label = "ACT";
gpios = <&gpio 16 1>;
default-state = "keep";
linux,default-trigger = "heartbeat";
};
};
ARM: add infra-structure for BCM2835 and Raspberry Pi The BCM2835 is an ARM SoC from Broadcom. This patch adds very basic support for this SoC. http://www.broadcom.com/products/BCM2835 http://www.raspberrypi.org/wp-content/uploads/2012/02/BCM2835-ARM-Peripherals.pdf Note that the documentation in the latter .pdf assumes the MMU setup that's used on the "VideoCore" companion processor, and does not document physical peripheral addresses. Subtract 0x5e000000 to obtain the physical addresses. This is accounted for by the ranges property in the /soc node in the device tree. The BCM2835 SoC is used in the Raspberry Pi. This patch also adds a minimal device tree for this board; enough to see some very early kernel boot messages through earlyprintk. However, this patch does not yet provide a useful booting system. http://www.raspberrypi.org/. This patch was extracted from git://github.com/lp0/linux.git branch rpi-split from 3-4 months ago, and significantly stripped down and modified since. Signed-off-by: Chris Boot <bootc@bootc.net> Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Signed-off-by: Dom Cobley <popcornmix@gmail.com> Signed-off-by: Dom Cobley <dc4@broadcom.com> Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> Acked-by: Arnd Bergmann <arnd@arndb.de>
2012-05-26 15:04:43 +08:00
};
ARM: bcm2835: enable GPIO/pinctrl Enable GPIO and pinctrl in Kconfig. Add required <mach/gpio.h> for gpiolib. Instantiate the BCM2835 GPIO module in bcm2835.dtsi. Add a pinctrl definition to bcm2835-rpi-b.dts that sets up all of the board's required pinmux configuration. GPIO aren't specified; that's left to gpio_request(). Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> Acked-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 11:54:21 +08:00
&gpio {
pinctrl-names = "default";
ARM: bcm2835: add USB controller to device tree The BCM2835 SoC contains a DWC2 USB controller. Add this to the DT. Set up the pin controller to fully enable the USB controller on the Raspberry Pi. The GPIO setup works because the default output value for GPIO 6 (LAN_RUN/n_reset) just happens to be 1, which enables the USB/LAN chip. Note that you'll need a U-Boot which enables power to the USB controller; search for U-Boot patch "ARM: rpi_b: power on SDHCI and USB HW modules". Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Olof Johansson <olof@lixom.net>
2013-12-27 10:43:10 +08:00
pinctrl-0 = <&gpioout &alt0 &alt3>;
gpioout: gpioout {
brcm,pins = <6>;
brcm,function = <1>; /* GPIO out */
};
ARM: bcm2835: enable GPIO/pinctrl Enable GPIO and pinctrl in Kconfig. Add required <mach/gpio.h> for gpiolib. Instantiate the BCM2835 GPIO module in bcm2835.dtsi. Add a pinctrl definition to bcm2835-rpi-b.dts that sets up all of the board's required pinmux configuration. GPIO aren't specified; that's left to gpio_request(). Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> Acked-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 11:54:21 +08:00
alt0: alt0 {
ARM: bcm2835: add USB controller to device tree The BCM2835 SoC contains a DWC2 USB controller. Add this to the DT. Set up the pin controller to fully enable the USB controller on the Raspberry Pi. The GPIO setup works because the default output value for GPIO 6 (LAN_RUN/n_reset) just happens to be 1, which enables the USB/LAN chip. Note that you'll need a U-Boot which enables power to the USB controller; search for U-Boot patch "ARM: rpi_b: power on SDHCI and USB HW modules". Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Olof Johansson <olof@lixom.net>
2013-12-27 10:43:10 +08:00
brcm,pins = <0 1 2 3 4 5 7 8 9 10 11 14 15 40 45>;
ARM: bcm2835: enable GPIO/pinctrl Enable GPIO and pinctrl in Kconfig. Add required <mach/gpio.h> for gpiolib. Instantiate the BCM2835 GPIO module in bcm2835.dtsi. Add a pinctrl definition to bcm2835-rpi-b.dts that sets up all of the board's required pinmux configuration. GPIO aren't specified; that's left to gpio_request(). Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> Acked-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 11:54:21 +08:00
brcm,function = <4>; /* alt0 */
};
alt3: alt3 {
brcm,pins = <48 49 50 51 52 53>;
brcm,function = <7>; /* alt3 */
};
};
ARM: bcm2835: add SDHCI node to DT Add the SDHCI device node to the SoC DT file. Add a dummy fixed-clock to satisfy the SDHCI driver's clock lookup; eventually this should be replaced by a real clock implementation. Add board specific properties to the Raspberry Pi board file. Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
2012-12-25 12:58:56 +08:00
ARM: bcm2835: add I2C controllers to DT The BCM2835 has 3 identical I2C controllers. Instantiate them all in the SoC .dtsi file, and enable the relevant two in the Raspberry Pi board .dts file. Note that on the Raspberry Pi Model B revision 1, I2C0 is connected to the general-purpose expansion header, and I2C1 is connected to the camera connector. Revision 2 of the board swaps these assignments:-( Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
2013-01-01 14:26:45 +08:00
&i2c0 {
status = "okay";
clock-frequency = <100000>;
};
&i2c1 {
status = "okay";
clock-frequency = <100000>;
};
ARM: bcm2835: add SDHCI node to DT Add the SDHCI device node to the SoC DT file. Add a dummy fixed-clock to satisfy the SDHCI driver's clock lookup; eventually this should be replaced by a real clock implementation. Add board specific properties to the Raspberry Pi board file. Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
2012-12-25 12:58:56 +08:00
&sdhci {
status = "okay";
bus-width = <4>;
};