Kernel-4.18.0-80.el8_fsl,imx-gpcv2

Freescale i.MX General Power Controller v2

The i.MX7S/D General Power Control (GPC) block contains Power Gating
Control (PGC) for various power domains.

Required properties:

• compatible: Should be “fsl,imx7d-gpc”

• reg: should be register base and length as documented in the
  datasheet

• interrupts: Should contain GPC interrupt request 1

Power domains contained within GPC node are generic power domain
providers, documented in
Documentation/devicetree/bindings/power/power_domain.txt, which are
described as subnodes of the power gating controller ‘pgc’ node,
which, in turn, is expected to contain the following:

Required properties:

• reg: Power domain index. Valid values are defined in
  include/dt-bindings/power/imx7-power.h

• #power-domain-cells: Should be 0

Optional properties:

• power-supply: Power supply used to power the domain

Example:

gpc: gpc@303a0000 {
    compatible = "fsl,imx7d-gpc";
    reg = <0x303a0000 0x1000>;
    interrupt-controller;
    interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
    #interrupt-cells = <3>;
    interrupt-parent = <&intc>;

    pgc {
        #address-cells = <1>;
        #size-cells = <0>;

        pgc_pcie_phy: power-domain@1 {
            #power-domain-cells = <0>;

            reg = <1>;
            power-supply = <&reg_1p0d>;
        };
    };
};

Specifying power domain for IP modules

IP cores belonging to a power domain should contain a ‘power-domains’
property that is a phandle for PGC node representing the domain.

Example of a device that is part of the PCIE_PHY power domain:

pcie: pcie@33800000 {
      reg = <0x33800000 0x4000>,
            <0x4ff00000 0x80000>;
    /* ... */
    power-domains = <&pgc_pcie_phy>;
    /* ... */
};