The firmware running on the RPi VideoCore can be used to reset and initialize the board's xHCI controller. The reset controller is passed to the PCI device through the DT, hence this binding.
Signed-off-by: Nicolas Saenz Julienne <[email protected]> --- .../arm/bcm/raspberrypi,bcm2835-firmware.yaml | 21 +++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml b/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml index b48ed875eb8e..8f9d0986c28f 100644 --- a/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml +++ b/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml @@ -39,6 +39,22 @@ properties: - compatible - "#clock-cells" + usb-reset: + type: object + + properties: + compatible: + const: raspberrypi,firmware-usb-reset + + "#clock-cells": + const: 0 + description: > + There is only one reset line available, so no need for cell decoding. + + required: + - compatible + - "#reset-cells" + additionalProperties: false required: @@ -55,5 +71,10 @@ examples: compatible = "raspberrypi,firmware-clocks"; #clock-cells = <1>; }; + + usb_reset: usb-reset { + compatible = "raspberrypi,firmware-usb-reset"; + #reset-cells = <0>; + }; }; ... -- 2.26.2
