Documentation/devicetree/bindings/power/fsl,imx-gpcv2.txt

   1 Freescale i.MX General Power Controller v2
   2 ==========================================
   3
   4 The i.MX7S/D General Power Control (GPC) block contains Power Gating
   5 Control (PGC) for various power domains.
   6
   7 Required properties:
   8
   9 - compatible: Should be one of:
  10         - "fsl,imx7d-gpc"
  11         - "fsl,imx8mq-gpc"
  12
  13 - reg: should be register base and length as documented in the
  14   datasheet
  15
  16 - interrupts: Should contain GPC interrupt request 1
  17
  18 Power domains contained within GPC node are generic power domain
  19 providers, documented in
  20 Documentation/devicetree/bindings/power/power_domain.txt, which are
  21 described as subnodes of the power gating controller 'pgc' node,
  22 which, in turn, is expected to contain the following:
  23
  24 Required properties:
  25
  26 - reg: Power domain index. Valid values are defined in
  27   include/dt-bindings/power/imx7-power.h for fsl,imx7d-gpc and
  28   include/dt-bindings/power/imx8m-power.h for fsl,imx8mq-gpc
  29
  30 - #power-domain-cells: Should be 0
  31
  32 Optional properties:
  33
  34 - power-supply: Power supply used to power the domain
  35
  36 Example:
  37
  38         gpc: gpc@303a0000 {
  39                 compatible = "fsl,imx7d-gpc";
  40                 reg = <0x303a0000 0x1000>;
  41                 interrupt-controller;
  42                 interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
  43                 #interrupt-cells = <3>;
  44                 interrupt-parent = <&intc>;
  45
  46                 pgc {
  47                         #address-cells = <1>;
  48                         #size-cells = <0>;
  49
  50                         pgc_pcie_phy: power-domain@1 {
  51                                 #power-domain-cells = <0>;
  52
  53                                 reg = <1>;
  54                                 power-supply = <&reg_1p0d>;
  55                         };
  56                 };
  57         };
  58
  59
  60 Specifying power domain for IP modules
  61 ======================================
  62
  63 IP cores belonging to a power domain should contain a 'power-domains'
  64 property that is a phandle for PGC node representing the domain.
  65
  66 Example of a device that is part of the PCIE_PHY power domain:
  67
  68         pcie: pcie@33800000 {
  69               reg = <0x33800000 0x4000>,
  70                     <0x4ff00000 0x80000>;
  71                 /* ... */
  72                 power-domains = <&pgc_pcie_phy>;
  73                 /* ... */
  74         };