Linux has a driver for gpio-usb-b-connector that uses a GPIO to determine host vs peripheral role. This can be useful for USB Type-B OTG connectors which have an ID pin that is grounded on OTG-to-host cables and floating on OTG-to-device cables as well as USB power switch controllers such as the TPS25821 which manages cc pins and has a SINK# output.
Both scenarios are used for various imx8mp-venice boards. This series addes support for usb controllers in otg mode (dr_mode="otg") which have a remote endpoint connector with compatible 'gpio-usb-b-connector' with an id-gpios property. The first patch adds this capability to the usb_get_dr_mode() function and the second disables the workarounds used for various imx8mp-venice boards to default the usb dual-role controllers to host mode. Tim Harvey (2): usb: common: allow dr_mode to come from gpio-id based usb-connector imx8mp-venice: enable USB device mode .../dts/imx8mp-venice-gw71xx-2x-u-boot.dtsi | 5 - .../dts/imx8mp-venice-gw72xx-2x-u-boot.dtsi | 5 - .../dts/imx8mp-venice-gw73xx-2x-u-boot.dtsi | 5 - arch/arm/dts/imx8mp-venice-gw74xx-u-boot.dtsi | 5 - configs/imx8mp_venice_defconfig | 7 ++ drivers/usb/common/common.c | 96 ++++++++++++++++++- 6 files changed, 102 insertions(+), 21 deletions(-) -- 2.25.1
