From 5631e7f4e29b1ebf3d856614c0b5876463857da6 Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Thu, 26 Dec 2013 19:43:10 -0700 Subject: [PATCH] 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 Signed-off-by: Olof Johansson --- arch/arm/boot/dts/bcm2835-rpi-b.dts | 9 +++++++-- arch/arm/boot/dts/bcm2835.dtsi | 6 ++++++ 2 files changed, 13 insertions(+), 2 deletions(-) diff --git a/arch/arm/boot/dts/bcm2835-rpi-b.dts b/arch/arm/boot/dts/bcm2835-rpi-b.dts index 6e9deb786a7d..2a3b1c1313a0 100644 --- a/arch/arm/boot/dts/bcm2835-rpi-b.dts +++ b/arch/arm/boot/dts/bcm2835-rpi-b.dts @@ -23,10 +23,15 @@ &gpio { pinctrl-names = "default"; - pinctrl-0 = <&alt0 &alt3>; + pinctrl-0 = <&gpioout &alt0 &alt3>; + + gpioout: gpioout { + brcm,pins = <6>; + brcm,function = <1>; /* GPIO out */ + }; alt0: alt0 { - brcm,pins = <0 1 2 3 4 5 6 7 8 9 10 11 14 15 40 45>; + brcm,pins = <0 1 2 3 4 5 7 8 9 10 11 14 15 40 45>; brcm,function = <4>; /* alt0 */ }; diff --git a/arch/arm/boot/dts/bcm2835.dtsi b/arch/arm/boot/dts/bcm2835.dtsi index aa537ed13f0a..b021c96d3ba1 100644 --- a/arch/arm/boot/dts/bcm2835.dtsi +++ b/arch/arm/boot/dts/bcm2835.dtsi @@ -107,6 +107,12 @@ clocks = <&clk_mmc>; status = "disabled"; }; + + usb { + compatible = "brcm,bcm2835-usb"; + reg = <0x7e980000 0x10000>; + interrupts = <1 9>; + }; }; clocks { -- 2.39.5