Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-pm.txt

   1 BCM2835 PM (Power domains, watchdog)
   2
   3 The PM block controls power domains and some reset lines, and includes
   4 a watchdog timer.  This binding supersedes the brcm,bcm2835-pm-wdt
   5 binding which covered some of PM's register range and functionality.
   6
   7 Required properties:
   8
   9 - compatible:           Should be "brcm,bcm2835-pm"
  10 - reg:                  Specifies base physical address and size of the two
  11                           register ranges ("PM" and "ASYNC_BRIDGE" in that
  12                           order)
  13 - clocks:               a) v3d: The V3D clock from CPRMAN
  14                         b) peri_image: The PERI_IMAGE clock from CPRMAN
  15                         c) h264: The H264 clock from CPRMAN
  16                         d) isp: The ISP clock from CPRMAN
  17 - #reset-cells:         Should be 1.  This property follows the reset controller
  18                           bindings[1].
  19 - #power-domain-cells:  Should be 1.  This property follows the power domain
  20                           bindings[2].
  21
  22 Optional properties:
  23
  24 - timeout-sec:          Contains the watchdog timeout in seconds
  25 - system-power-controller: Whether the watchdog is controlling the
  26     system power.  This node follows the power controller bindings[3].
  27
  28 [1] Documentation/devicetree/bindings/reset/reset.txt
  29 [2] Documentation/devicetree/bindings/power/power-domain.yaml
  30 [3] Documentation/devicetree/bindings/power/power-controller.txt
  31
  32 Example:
  33
  34 pm {
  35         compatible = "brcm,bcm2835-pm", "brcm,bcm2835-pm-wdt";
  36         #power-domain-cells = <1>;
  37         #reset-cells = <1>;
  38         reg = <0x7e100000 0x114>,
  39               <0x7e00a000 0x24>;
  40         clocks = <&clocks BCM2835_CLOCK_V3D>,
  41                  <&clocks BCM2835_CLOCK_PERI_IMAGE>,
  42                  <&clocks BCM2835_CLOCK_H264>,
  43                  <&clocks BCM2835_CLOCK_ISP>;
  44         clock-names = "v3d", "peri_image", "h264", "isp";
  45         system-power-controller;
  46 };