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| author |   Marco Felsch <m.felsch@pengutronix.de> | 2019-01-16 15:20:36 +0100 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-18 10:00:49 +0100 |
| commit | 5d6353fe6984e7c3c41dae47aa38ee9c8ddaebd8 (patch) | |
| tree | e7b32b85551509acbcce87410385e44b54f1a1c4 /Documentation/devicetree/bindings/usb | |
| parent | usb: renesas_usbhs: replace udelay() with usleep_range() (diff) | |
| download | linux-dev-5d6353fe6984e7c3c41dae47aa38ee9c8ddaebd8.tar.xz linux-dev-5d6353fe6984e7c3c41dae47aa38ee9c8ddaebd8.zip | |
dt-bindings: usb: usb251xb: add documentation for data lane swapping
Add optional binding to allow USB differential-pair (D+/D-) data lane
swapping. The swapping can be specified for each port separately,
default is no swapping.
Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Reviewed-by: Richard Leitner <richard.leitner@skidata.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/devicetree/bindings/usb')
| -rw-r--r-- | Documentation/devicetree/bindings/usb/usb251xb.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/usb/usb251xb.txt b/Documentation/devicetree/bindings/usb/usb251xb.txt index 168ff819e827..17915f64b8ee 100644 --- a/Documentation/devicetree/bindings/usb/usb251xb.txt +++ b/Documentation/devicetree/bindings/usb/usb251xb.txt @@ -64,6 +64,8 @@ Optional properties : - power-on-time-ms : Specifies the time it takes from the time the host initiates the power-on sequence to a port until the port has adequate power. The value is given in ms in a 0 - 510 range (default is 100ms). + - swap-dx-lanes : Specifies the ports which will swap the differential-pair + (D+/D-), default is not-swapped. Examples: usb2512b@2c { @@ -81,4 +83,6 @@ Examples: manufacturer = "Foo"; product = "Foo-Bar"; serial = "1234567890A"; + /* correct misplaced usb connectors on port 1,2 */ + swap-dx-lanes = <1 2>; }; |