From: Xu Yang Date: Tue, 27 Jun 2023 11:21:25 +0000 (+0800) Subject: dt-bindings: usb: ci-hdrc-usb2: add fsl,picophy-rise-fall-time-adjust property X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=8d2c452c9ee982ed26c742b9faab0f3202370f7d;p=linux.git 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 Reviewed-by: Krzysztof Kozlowski Acked-by: Peter Chen Link: https://lore.kernel.org/r/20230627112126.1882666-2-xu.yang_2@nxp.com Signed-off-by: Greg Kroah-Hartman --- diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml index 782402800d4ab..532d6464c8b33 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