diff options
| author | Xu Yang <xu.yang_2@nxp.com> | 2023-06-27 19:21:25 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-07-25 18:21:52 +0200 |
| commit | 8d2c452c9ee982ed26c742b9faab0f3202370f7d (patch) | |
| tree | 522bdc89e4622154303adb197154f4a3599debc2 /Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml | |
| parent | 36668515d56bf73f06765c71e08c8f7465f1e5c4 (diff) | |
dt-bindings: usb: ci-hdrc-usb2: add fsl,picophy-rise-fall-time-adjust property
The fsl,picophy-rise-fall-time-adjust property can help to adjust the
rise/fall times of the high-speed transmitter waveform. The value can be
0~3. It has no unit. According to the description of USBNC_n_PHY_CFG1
register, the rise/fall time will be increased or decreased by a certain
percentage relative to design default time if a value is given to this
property.
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Peter Chen <peter.chen@kernel.org>
Link: https://lore.kernel.org/r/20230627112126.1882666-2-xu.yang_2@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml')
| -rw-r--r-- | Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml index 782402800d4a..532d6464c8b3 100644 --- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml @@ -292,6 +292,18 @@ properties: minimum: 0x0 maximum: 0xf + fsl,picophy-rise-fall-time-adjust: + description: + HS Transmitter Rise/Fall Time Adjustment. Adjust the rise/fall times + of the high-speed transmitter waveform. It has no unit. The rise/fall + time will be increased or decreased by a certain percentage relative + to design default time. (0:-10%; 1:design default; 2:+15%; 3:+20%) + Details can refer to TXRISETUNE0 bit of USBNC_n_PHY_CFG1. + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 0 + maximum: 3 + default: 1 + usb-phy: description: phandle for the PHY device. Use "phys" instead. $ref: /schemas/types.yaml#/definitions/phandle |