Commit b2e75563 authored by Johannes Zink's avatar Johannes Zink Committed by Vinod Koul
Browse files

dt-bindings: phy: imx8mq-usb: add phy tuning properties 



Add optional properties for tuning of usb phy.

Signed-off-by: default avatarJohannes Zink <j.zink@pengutronix.de>
Reviewed-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230516-lustige-usb-phy-dinge-v2-1-3383a0de34ac@pengutronix.de


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 1904c3f5

Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml

+47 −0
Original line number Diff line number Diff line
@@ -35,6 +35,53 @@ properties: 
    description:

      A phandle to the regulator for USB VBUS.



  fsl,phy-tx-vref-tune-percent:

    description:

      Tunes the HS DC level relative to the nominal level

    minimum: 94

    maximum: 124



  fsl,phy-tx-rise-tune-percent:

    description:

      Adjusts the rise/fall time duration of the HS waveform relative to

      its nominal value

    minimum: 97

    maximum: 103



  fsl,phy-tx-preemp-amp-tune-microamp:

    description:

      Adjust amount of current sourced to DPn and DMn after a J-to-K

      or K-to-J transition. Default is 0 (disabled).

    minimum: 0

    maximum: 1800



  fsl,phy-tx-vboost-level-microvolt:

    description:

      Adjust the boosted transmit launch pk-pk differential amplitude

    minimum: 880

    maximum: 1120



  fsl,phy-comp-dis-tune-percent:

    description:

      Adjust the voltage level used to detect a disconnect event at the host

      relative to the nominal value

    minimum: 91

    maximum: 115



  fsl,phy-pcs-tx-deemph-3p5db-attenuation-db:

    description:

      Adjust TX de-emphasis attenuation in dB at nominal

      3.5dB point as per USB specification

    $ref: /schemas/types.yaml#/definitions/uint32

    minimum: 0

    maximum: 36



  fsl,phy-pcs-tx-swing-full-percent:

    description:

      Scaling of the voltage defined by fsl,phy-tx-vboost-level-microvolt

    minimum: 0

    maximum: 100



required:

  - compatible

  - reg