dt-bindings: usb: usb251xb: add documentation for voltage supply

Add the optional voltage supply documentation. If not specified the
dummy-regulator is used.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Acked-by: Richard Leitner <richard.leitner@skidata.com>
Link: https://lore.kernel.org/r/20190917144449.32739-2-m.felsch@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Marco Felsch 2019-09-17 16:44:46 +02:00 • committed by Greg Kroah-Hartman
commit ad9480ae36