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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
parent 4aec2393f5
commit ad9480ae36
1 changed files with 1 additions and 0 deletions
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Documentation/devicetree/bindings/usb/usb251xb.txt
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@ -12,6 +12,7 @@ Required properties :
Optional properties :
- reset-gpios : Should specify the gpio for hub reset
- vdd-supply : Should specify the phandle to the regulator supplying vdd
- skip-config : Skip Hub configuration, but only send the USB-Attach command
- vendor-id : Set USB Vendor ID of the hub (16 bit, default is 0x0424)
- product-id : Set USB Product ID of the hub (16 bit, default depends on type)