Documentation/devicetree/bindings/mfd/brcm,twd.yaml

   1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/mfd/brcm,twd.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Broadcom's Timer-Watchdog (aka TWD)
   8
   9 maintainers:
  10   - Rafał Miłecki <rafal@milecki.pl>
  11
  12 description: |
  13   Broadcom has a Timer-Watchdog block used in multiple SoCs (e.g., BCM4908,
  14   BCM63xx, BCM7038). There are few variants available (they differ slightly in
  15   registers layout). This block consists of: timers, watchdog and optionally a
  16   software reset handler.
  17
  18 properties:
  19   compatible:
  20     items:
  21       - enum:
  22           - brcm,bcm4908-twd
  23           - brcm,bcm7038-twd
  24       - const: simple-mfd
  25       - const: syscon
  26
  27   reg:
  28     maxItems: 1
  29
  30   ranges: true
  31
  32   "#address-cells":
  33     const: 1
  34
  35   "#size-cells":
  36     const: 1
  37
  38 patternProperties:
  39   '^timer@[a-f0-9]+$':
  40     $ref: /schemas/timer/brcm,bcmbca-timer.yaml
  41
  42   '^watchdog@[a-f0-9]+$':
  43     $ref: /schemas/watchdog/brcm,bcm7038-wdt.yaml
  44
  45 additionalProperties: false
  46
  47 required:
  48   - reg
  49
  50 examples:
  51   - |
  52     timer-mfd@ff800400 {
  53         compatible = "brcm,bcm4908-twd", "simple-mfd", "syscon";
  54         reg = <0xff800400 0x4c>;
  55         ranges = <0x00000000 0xff800400 0x4c>;
  56
  57         #address-cells = <1>;
  58         #size-cells = <1>;
  59
  60         timer@0 {
  61             compatible = "brcm,bcm63138-timer";
  62             reg = <0x0 0x28>;
  63         };
  64
  65         watchdog@28 {
  66             compatible = "brcm,bcm7038-wdt";
  67             reg = <0x28 0x8>;
  68         };
  69     };