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Diffstat (limited to 'Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml')
-rw-r--r-- | Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml | 103 |
1 files changed, 103 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 new file mode 100644 index 0000000000..dc3a3f709f --- /dev/null +++ b/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml @@ -0,0 +1,103 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/phy/fsl,imx8mq-usb-phy.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Freescale i.MX8MQ USB3 PHY + +maintainers: + - Li Jun <jun.li@nxp.com> + +properties: + compatible: + enum: + - fsl,imx8mq-usb-phy + - fsl,imx8mp-usb-phy + + reg: + maxItems: 1 + + "#phy-cells": + const: 0 + + clocks: + maxItems: 1 + + clock-names: + items: + - const: phy + + power-domains: + maxItems: 1 + + vbus-supply: + 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 + - "#phy-cells" + - clocks + - clock-names + +additionalProperties: false + +examples: + - | + #include <dt-bindings/clock/imx8mq-clock.h> + usb3_phy0: phy@381f0040 { + compatible = "fsl,imx8mq-usb-phy"; + reg = <0x381f0040 0x40>; + clocks = <&clk IMX8MQ_CLK_USB1_PHY_ROOT>; + clock-names = "phy"; + #phy-cells = <0>; + }; |