Commit 1239e812 authored by Emanuele Ghidoli's avatar Emanuele Ghidoli Committed by Greg Kroah-Hartman
Browse files

dt-bindings: usb: smsc,usb3503: Add usb3803 



Add support for usb3803, compared to usb3503 it uses a regular USB
connection to upstream instead of HSIC, it has an additional
low power mode (bypass) and an additional control signal (BYPASS_N).

In bypass mode the downstream port 3 is connected to the upstream port
with low switch resistance R_on.

Signed-off-by: default avatarEmanuele Ghidoli <emanuele.ghidoli@toradex.com>
Signed-off-by: default avatarFrancesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230313165039.255579-2-francesco@dolcini.it


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 34427557

Documentation/devicetree/bindings/usb/smsc,usb3503.yaml

+52 −2
Original line number Diff line number Diff line
@@ -14,6 +14,7 @@ properties: 
    enum:

      - smsc,usb3503

      - smsc,usb3503a

      - smsc,usb3803



  reg:

    maxItems: 1
@@ -33,6 +34,12 @@ properties: 
    description: >

      GPIO for reset



  bypass-gpios:

    maxItems: 1

    description: >

      GPIO for bypass.

      Control signal to select between HUB MODE and BYPASS MODE.



  disabled-ports:

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

    minItems: 1
@@ -46,9 +53,10 @@ properties: 


  initial-mode:

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

    enum: [1, 2]

    description: >

      Specifies initial mode. 1 for Hub mode, 2 for standby mode.

      Specifies initial mode. 1 for Hub mode, 2 for standby mode and 3 for bypass mode.

      In bypass mode the downstream port 3 is connected to the upstream port with low

      switch resistance R_on.



  clocks:

    maxItems: 1
@@ -71,6 +79,29 @@ properties: 
required:

  - compatible



allOf:

  - if:

      not:

        properties:

          compatible:

            enum:

              - smsc,usb3803

    then:

      properties:

        bypass-gpios: false



  - if:

      required:

        - bypass-gpios

    then:

      properties:

        initial-mode:

          enum: [1, 2, 3]

    else:

      properties:

        initial-mode:

          enum: [1, 2]



additionalProperties: false



examples:
@@ -92,6 +123,25 @@ examples: 
          };

      };



  - |

      i2c {

          #address-cells = <1>;

          #size-cells = <0>;



          usb-hub@8 {

              compatible = "smsc,usb3803";

              reg = <0x08>;

              connect-gpios = <&gpx3 0 1>;

              disabled-ports = <2 3>;

              intn-gpios = <&gpx3 4 1>;

              reset-gpios = <&gpx3 5 1>;

              bypass-gpios = <&gpx3 6 1>;

              initial-mode = <3>;

              clocks = <&clks 80>;

              clock-names = "refclk";

          };

      };



  - |

      #include <dt-bindings/gpio/gpio.h>