[PATCH 3/3] ARM: bcm2835: Add the necessary firmware driver information to the DT

Eric Anholt eric at anholt.net
Wed Apr 29 09:29:26 PDT 2015

Stephen Warren <swarren at wwwdotorg.org> writes:

> On 04/27/2015 05:14 PM, Eric Anholt wrote:
>> This gets the USB power domain turned on so that DWC2 can probe, even
>> if the bootloader didn't turn it on for us (which is the case if you
>> use the RPi firmware without chainloading U-Boot).
>> diff --git a/arch/arm/boot/dts/bcm2835-rpi.dtsi b/arch/arm/boot/dts/bcm2835-rpi.dtsi
>> +&usb {
>> +	power-domains = <&firmware POWER_DOMAIN_USB>;
>> +};
> That property doesn't seem to be documented in
> Documentation/devicetree/bindings/usb/dwc2.txt (which defines compatible
> = "brcm,bcm2835-usb"). Is it implemented?

power-domains is a generic property that's parsed by
drivers/base/power/domain.c.  See also
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