| Message ID | 1386131536-21066-1-git-send-email-swarren@wwwdotorg.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 12/03/2013 09:32 PM, Stephen Warren wrote: > 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". I've applied this to bcm2835's for-3.14/dt branch.
diff --git a/arch/arm/boot/dts/bcm2835-rpi-b.dts b/arch/arm/boot/dts/bcm2835-rpi-b.dts index 6e9deb7..2a3b1c1 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 aa537ed..b021c96 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 {
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> --- arch/arm/boot/dts/bcm2835-rpi-b.dts | 9 +++++++-- arch/arm/boot/dts/bcm2835.dtsi | 6 ++++++ 2 files changed, 13 insertions(+), 2 deletions(-)