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| author | Johannes Zink <j.zink@pengutronix.de> | 2023-05-16 18:20:19 +0200 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2023-05-19 19:50:30 +0200 |
| commit | b2e75563dc3926ff6ec7344ada456758340ef37b (patch) | |
| tree | 1aa5cb7ea6195b7dd48a8a438042af1475058d3a /Documentation | |
| parent | phy: qcom-qmp-combo: Introduce drm_bridge (diff) | |
| download | linux-b2e75563dc3926ff6ec7344ada456758340ef37b.tar.xz linux-b2e75563dc3926ff6ec7344ada456758340ef37b.zip | |
dt-bindings: phy: imx8mq-usb: add phy tuning properties
Add optional properties for tuning of usb phy.
Signed-off-by: Johannes Zink <j.zink@pengutronix.de>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230516-lustige-usb-phy-dinge-v2-1-3383a0de34ac@pengutronix.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml b/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml index e6f9f5540cc3..dc3a3f709fea 100644 --- a/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml +++ b/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml @@ -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 |