Documentation/devicetree/bindings/arm/sp810.yaml

   1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/arm/sp810.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: ARM Versatile Express SP810 System Controller
   8
   9 maintainers:
  10   - Andre Przywara <andre.przywara@arm.com>
  11
  12 description:
  13   The Arm SP810 system controller provides clocks, timers and a watchdog.
  14
  15 # We need a select here so we don't match all nodes with 'arm,primecell'
  16 select:
  17   properties:
  18     compatible:
  19       contains:
  20         const: arm,sp810
  21   required:
  22     - compatible
  23
  24 properties:
  25   compatible:
  26     items:
  27       - const: arm,sp810
  28       - const: arm,primecell
  29
  30   reg:
  31     maxItems: 1
  32
  33   clock-names:
  34     items:
  35       - const: refclk
  36       - const: timclk
  37       - const: apb_pclk
  38
  39   clocks:
  40     items:
  41       - description: reference clock
  42       - description: timer clock
  43       - description: APB register access clock
  44
  45   "#clock-cells":
  46     const: 1
  47
  48   clock-output-names:
  49     maxItems: 4
  50
  51   assigned-clocks:
  52     maxItems: 4
  53
  54   assigned-clock-parents:
  55     maxItems: 4
  56
  57 additionalProperties: false
  58
  59 required:
  60   - compatible
  61   - reg
  62   - clocks
  63   - clock-names
  64   - "#clock-cells"
  65
  66 examples:
  67   - |
  68     sysctl@20000 {
  69         compatible = "arm,sp810", "arm,primecell";
  70         reg = <0x020000 0x1000>;
  71         clocks = <&v2m_refclk32khz>, <&v2m_refclk1mhz>, <&smbclk>;
  72         clock-names = "refclk", "timclk", "apb_pclk";
  73         #clock-cells = <1>;
  74         clock-output-names = "timerclken0", "timerclken1",
  75                              "timerclken2", "timerclken3";
  76         assigned-clocks = <&v2m_sysctl 0>, <&v2m_sysctl 1>,
  77                           <&v2m_sysctl 3>, <&v2m_sysctl 3>;
  78         assigned-clock-parents = <&v2m_refclk1mhz>, <&v2m_refclk1mhz>,
  79                                  <&v2m_refclk1mhz>, <&v2m_refclk1mhz>;
  80     };