linux/Documentation/devicetree/bindings/powerpc/fsl/guts.txt
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   1* Global Utilities Block
   2
   3The global utilities block controls power management, I/O device
   4enabling, power-on-reset configuration monitoring, general-purpose
   5I/O signal configuration, alternate function selection for multiplexed
   6signals, and clock control.
   7
   8Required properties:
   9
  10 - compatible : Should define the compatible device type for
  11   global-utilities.
  12 - reg : Offset and length of the register set for the device.
  13
  14Recommended properties:
  15
  16 - fsl,has-rstcr : Indicates that the global utilities register set
  17   contains a functioning "reset control register" (i.e. the board
  18   is wired to reset upon setting the HRESET_REQ bit in this register).
  19
  20 - fsl,liodn-bits : Indicates the number of defined bits in the LIODN
  21   registers, for those SOCs that have a PAMU device.
  22
  23Examples:
  24        global-utilities@e0000 {        /* global utilities block */
  25                compatible = "fsl,mpc8548-guts";
  26                reg = <e0000 1000>;
  27                fsl,has-rstcr;
  28        };
  29
  30        guts: global-utilities@e0000 {
  31                compatible = "fsl,qoriq-device-config-1.0";
  32                reg = <0xe0000 0xe00>;
  33                fsl,has-rstcr;
  34                #sleep-cells = <1>;
  35                fsl,liodn-bits = <12>;
  36        };
  37