Bindings/phy/fsl,imx8mq-usb-phy.yaml

   1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/phy/fsl,imx8mq-usb-phy.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Freescale i.MX8MQ USB3 PHY
   8
   9 maintainers:
  10   - Li Jun <jun.li@nxp.com>
  11
  12 properties:
  13   compatible:
  14     enum:
  15       - fsl,imx8mq-usb-phy
  16       - fsl,imx8mp-usb-phy
  17
  18   reg:
  19     maxItems: 1
  20
  21   "#phy-cells":
  22     const: 0
  23
  24   clocks:
  25     maxItems: 1
  26
  27   clock-names:
  28     items:
  29       - const: phy
  30
  31   power-domains:
  32     maxItems: 1
  33
  34   vbus-supply:
  35     description:
  36       A phandle to the regulator for USB VBUS.
  37
  38   fsl,phy-tx-vref-tune-percent:
  39     description:
  40       Tunes the HS DC level relative to the nominal level
  41     minimum: 94
  42     maximum: 124
  43
  44   fsl,phy-tx-rise-tune-percent:
  45     description:
  46       Adjusts the rise/fall time duration of the HS waveform relative to
  47       its nominal value
  48     minimum: 97
  49     maximum: 103
  50
  51   fsl,phy-tx-preemp-amp-tune-microamp:
  52     description:
  53       Adjust amount of current sourced to DPn and DMn after a J-to-K
  54       or K-to-J transition. Default is 0 (disabled).
  55     minimum: 0
  56     maximum: 1800
  57
  58   fsl,phy-tx-vboost-level-microvolt:
  59     description:
  60       Adjust the boosted transmit launch pk-pk differential amplitude
  61     minimum: 880
  62     maximum: 1120
  63
  64   fsl,phy-comp-dis-tune-percent:
  65     description:
  66       Adjust the voltage level used to detect a disconnect event at the host
  67       relative to the nominal value
  68     minimum: 91
  69     maximum: 115
  70
  71   fsl,phy-pcs-tx-deemph-3p5db-attenuation-db:
  72     description:
  73       Adjust TX de-emphasis attenuation in dB at nominal
  74       3.5dB point as per USB specification
  75     $ref: /schemas/types.yaml#/definitions/uint32
  76     minimum: 0
  77     maximum: 36
  78
  79   fsl,phy-pcs-tx-swing-full-percent:
  80     description:
  81       Scaling of the voltage defined by fsl,phy-tx-vboost-level-microvolt
  82     minimum: 0
  83     maximum: 100
  84
  85 required:
  86   - compatible
  87   - reg
  88   - "#phy-cells"
  89   - clocks
  90   - clock-names
  91
  92 additionalProperties: false
  93
  94 examples:
  95   - |
  96     #include <dt-bindings/clock/imx8mq-clock.h>
  97     usb3_phy0: phy@381f0040 {
  98         compatible = "fsl,imx8mq-usb-phy";
  99         reg = <0x381f0040 0x40>;
 100         clocks = <&clk IMX8MQ_CLK_USB1_PHY_ROOT>;
 101         clock-names = "phy";
 102         #phy-cells = <0>;
 103     };