renesas,rcar-usb2-clock-sel.yaml

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    1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
    2 %YAML 1.2
    3 ---
    4 $id: "http://devicetree.org/schemas/clock/renesas,rcar-usb2-clock-sel.yaml#"
    5 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
    6 
    7 title: Renesas R-Car USB 2.0 clock selector
    8 
    9 maintainers:
   10   - Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
   11 
   12 description: |
   13   If you connect an external clock to the USB_EXTAL pin only, you should set
   14   the clock rate to "usb_extal" node only.
   15   If you connect an oscillator to both the USB_XTAL and USB_EXTAL, this module
   16   is not needed because this is default setting. (Of course, you can set the
   17   clock rates to both "usb_extal" and "usb_xtal" nodes.
   18 
   19   Case 1: An external clock connects to R-Car SoC
   20     +----------+   +--- R-Car ---------------------+
   21     |External  |---|USB_EXTAL ---> all usb channels|
   22     |clock     |   |USB_XTAL                       |
   23     +----------+   +-------------------------------+
   24 
   25   In this case, we need this driver with "usb_extal" clock.
   26 
   27   Case 2: An oscillator connects to R-Car SoC
   28     +----------+   +--- R-Car ---------------------+
   29     |Oscillator|---|USB_EXTAL -+-> all usb channels|
   30     |          |---|USB_XTAL --+                   |
   31     +----------+   +-------------------------------+
   32   In this case, we don't need this selector.
   33 
   34 properties:
   35   compatible:
   36     items:
   37       - enum:
   38           - renesas,r8a774a1-rcar-usb2-clock-sel # RZ/G2M
   39           - renesas,r8a774b1-rcar-usb2-clock-sel # RZ/G2N
   40           - renesas,r8a774e1-rcar-usb2-clock-sel # RZ/G2H
   41           - renesas,r8a7795-rcar-usb2-clock-sel  # R-Car H3
   42           - renesas,r8a7796-rcar-usb2-clock-sel  # R-Car M3-W
   43           - renesas,r8a77961-rcar-usb2-clock-sel # R-Car M3-W+
   44       - const: renesas,rcar-gen3-usb2-clock-sel
   45 
   46   reg:
   47     maxItems: 1
   48 
   49   clocks:
   50     minItems: 4
   51     maxItems: 4
   52 
   53   clock-names:
   54     items:
   55       - const: ehci_ohci
   56       - const: hs-usb-if
   57       - const: usb_extal
   58       - const: usb_xtal
   59 
   60   '#clock-cells':
   61     const: 0
   62 
   63   power-domains:
   64     maxItems: 1
   65 
   66   resets:
   67     minItems: 2
   68     maxItems: 2
   69 
   70   reset-names:
   71     items:
   72       - const: ehci_ohci
   73       - const: hs-usb-if
   74 
   75 required:
   76   - compatible
   77   - reg
   78   - clocks
   79   - clock-names
   80   - '#clock-cells'
   81   - power-domains
   82   - resets
   83   - reset-names
   84 
   85 additionalProperties: false
   86 
   87 examples:
   88   - |
   89     #include <dt-bindings/clock/r8a7795-cpg-mssr.h>
   90     #include <dt-bindings/power/r8a7795-sysc.h>
   91 
   92     usb2_clksel: clock-controller@e6590630 {
   93         compatible = "renesas,r8a7795-rcar-usb2-clock-sel",
   94                      "renesas,rcar-gen3-usb2-clock-sel";
   95         reg = <0xe6590630 0x02>;
   96         clocks = <&cpg CPG_MOD 703>, <&cpg CPG_MOD 704>,
   97                  <&usb_extal>, <&usb_xtal>;
   98         clock-names = "ehci_ohci", "hs-usb-if", "usb_extal", "usb_xtal";
   99         #clock-cells = <0>;
  100         power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
  101         resets = <&cpg 703>, <&cpg 704>;
  102         reset-names = "ehci_ohci", "hs-usb-if";
  103     };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/clock/renesas,rcar-usb2-clock-sel.yaml

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/clock/renesas,rcar-usb2-clock-sel.yaml