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     1 # SPDX-License-Identifier: GPL-2.0
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/clock/rockchip,rv1108-cru.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: Rockchip RV1108 Clock and Reset Unit (CRU)
    8 
    9 maintainers:
   10   - Elaine Zhang <zhangqing@rock-chips.com>
   11   - Heiko Stuebner <heiko@sntech.de>
   12 
   13 description: |
   14   The RV1108 clock controller generates and supplies clocks to various
   15   controllers within the SoC and also implements a reset controller for SoC
   16   peripherals.
   17   Each clock is assigned an identifier and client nodes can use this identifier
   18   to specify the clock which they consume. All available clocks are defined as
   19   preprocessor macros in the dt-bindings/clock/rv1108-cru.h headers and can be
   20   used in device tree sources. Similar macros exist for the reset sources in
   21   these files.
   22   There are several clocks that are generated outside the SoC. It is expected
   23   that they are defined using standard clock bindings with following
   24   clock-output-names:
   25     - "xin24m"   - crystal input                              - required
   26     - "ext_vip"  - external VIP clock                         - optional
   27     - "ext_i2s"  - external I2S clock                         - optional
   28     - "ext_gmac" - external GMAC clock                        - optional
   29     - "hdmiphy"  - external clock input derived from HDMI PHY - optional
   30     - "usbphy"   - external clock input derived from USB PHY  - optional
   31 
   32 properties:
   33   compatible:
   34     enum:
   35       - rockchip,rv1108-cru
   36 
   37   reg:
   38     maxItems: 1
   39 
   40   "#clock-cells":
   41     const: 1
   42 
   43   "#reset-cells":
   44     const: 1
   45 
   46   clocks:
   47     maxItems: 1
   48 
   49   clock-names:
   50     const: xin24m
   51 
   52   rockchip,grf:
   53     $ref: /schemas/types.yaml#/definitions/phandle
   54     description:
   55       Phandle to the syscon managing the "general register files" (GRF),
   56       if missing pll rates are not changeable, due to the missing pll
   57       lock status.
   58 
   59 required:
   60   - compatible
   61   - reg
   62   - "#clock-cells"
   63   - "#reset-cells"
   64 
   65 additionalProperties: false
   66 
   67 examples:
   68   - |
   69     cru: clock-controller@20200000 {
   70       compatible = "rockchip,rv1108-cru";
   71       reg = <0x20200000 0x1000>;
   72       rockchip,grf = <&grf>;
   73       #clock-cells = <1>;
   74       #reset-cells = <1>;
   75     };
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