On Thu, Aug 16, 2018 at 12:11 AM Arkadiusz Lis <areklis909@xxxxxxxxx> wrote: > What I learned > from Documentation/driver-api/gpio/board.rst is this string should be > equal to <function> prefix in <function>-gpios node in device tree. > For example: in file drivers/i2c/busses/i2c-gpio.c author gets gpio > descriptor with con_ids 'sda' and 'scl'. They are described in > Documentation/devicetree/bindings/i2c/i2c-gpio.txt as required > properties. You got it right. > In my case I didn't find bindings for emxx_udc driver and I don't know > what string should I insert: > gpiod = devm_gpiod_get(udc->dev, "DT_GPIOS_NAME", GPIOD_IN); // > "DT_GPIOS_NAME" is a placeholder This driver is not yet converted to use device tree so there is no way you can know this property name before bindings are established. You or someone else first need to define device tree bindings in Documention/devicetree/bindings/usb/* somwhere, then augment the driver to use these bindings, including the right name for the GPIO line, when using the devm_gpiod_get(). Pretty certainly the chosen GPIO name will be "vbus-gpios" in this case so you will pass "vbus" as name. But that needs to first be discussed by the DT bindings mailing list. I wonder how you're testing this though. Yours, Linus Walleij _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
