rockchip,px30-cru.yaml

  1# SPDX-License-Identifier: (GPL-2.0+ OR MIT)
  2%YAML 1.2
  3---
  4$id: http://devicetree.org/schemas/clock/rockchip,px30-cru.yaml#
  5$schema: http://devicetree.org/meta-schemas/core.yaml#
  6
  7title: Rockchip PX30 Clock and Reset Unit (CRU)
  8
  9maintainers:
 10  - Elaine Zhang <zhangqing@rock-chips.com>
 11  - Heiko Stuebner <heiko@sntech.de>
 12
 13description: |
 14  The PX30 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/px30-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    - "xin32k"     - rtc clock           - optional
 27    - "i2sx_clkin" - external I2S clock  - optional
 28    - "gmac_clkin" - external GMAC clock - optional
 29
 30properties:
 31  compatible:
 32    enum:
 33      - rockchip,px30-cru
 34      - rockchip,px30-pmucru
 35
 36  reg:
 37    maxItems: 1
 38
 39  "#clock-cells":
 40    const: 1
 41
 42  "#reset-cells":
 43    const: 1
 44
 45  clocks:
 46    minItems: 1
 47    items:
 48      - description: Clock for both PMUCRU and CRU
 49      - description: Clock for CRU (sourced from PMUCRU)
 50
 51  clock-names:
 52    minItems: 1
 53    items:
 54      - const: xin24m
 55      - const: gpll
 56
 57  rockchip,grf:
 58    $ref: /schemas/types.yaml#/definitions/phandle
 59    description:
 60      Phandle to the syscon managing the "general register files" (GRF),
 61      if missing pll rates are not changeable, due to the missing pll
 62      lock status.
 63
 64required:
 65  - compatible
 66  - reg
 67  - clocks
 68  - clock-names
 69  - "#clock-cells"
 70  - "#reset-cells"
 71
 72allOf:
 73  - if:
 74      properties:
 75        compatible:
 76          contains:
 77            const: rockchip,px30-cru
 78
 79    then:
 80      properties:
 81        clocks:
 82          minItems: 2
 83
 84        clock-names:
 85          minItems: 2
 86
 87    else:
 88      properties:
 89        clocks:
 90          maxItems: 1
 91
 92        clock-names:
 93          maxItems: 1
 94
 95additionalProperties: false
 96
 97examples:
 98  - |
 99    #include <dt-bindings/clock/px30-cru.h>
100
101    pmucru: clock-controller@ff2bc000 {
102      compatible = "rockchip,px30-pmucru";
103      reg = <0xff2bc000 0x1000>;
104      clocks = <&xin24m>;
105      clock-names = "xin24m";
106      rockchip,grf = <&grf>;
107      #clock-cells = <1>;
108      #reset-cells = <1>;
109    };
110
111    cru: clock-controller@ff2b0000 {
112      compatible = "rockchip,px30-cru";
113      reg = <0xff2b0000 0x1000>;
114      clocks = <&xin24m>, <&pmucru PLL_GPLL>;
115      clock-names = "xin24m", "gpll";
116      rockchip,grf = <&grf>;
117      #clock-cells = <1>;
118      #reset-cells = <1>;
119    };