cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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renesas,rcar-usb2-clock-sel.yaml (2955B)

      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
      7title: Renesas R-Car USB 2.0 clock selector
      8
      9maintainers:
     10  - Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
     11
     12description: |
     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
     34properties:
     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
     75required:
     76  - compatible
     77  - reg
     78  - clocks
     79  - clock-names
     80  - '#clock-cells'
     81  - power-domains
     82  - resets
     83  - reset-names
     84
     85additionalProperties: false
     86
     87examples:
     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    };