Kernel-4.18.0-80.el8_bd9571mwv

• ROHM BD9571MWV Power Management Integrated Circuit (PMIC) bindings

Required properties:

• compatible : Should be “rohm,bd9571mwv”.
• reg : I2C slave address.
• interrupt-parent : Phandle to the parent interrupt controller.
• interrupts : The interrupt line the device is connected to.
• interrupt-controller : Marks the device node as an interrupt controller.
• #interrupt-cells : The number of cells to describe an IRQ, should be 2.

           The first cell is the IRQ number.
           The second cell is the flags, encoded as trigger
           masks from ../interrupt-controller/interrupts.txt.
  

• gpio-controller : Marks the device node as a GPIO Controller.
• #gpio-cells : Should be two. The first cell is the pin number and

                       the second cell is used to specify flags.
                       See ../gpio/gpio.txt for more information.
  

• regulators: : List of child nodes that specify the regulator

                       initialization data. Child nodes must be named
                       after their hardware counterparts:
            - vd09
            - vd18
            - vd25
            - vd33
            - dvfs
           Each child node is defined using the standard
           binding for regulators.
  

Optional properties:

• rohm,ddr-backup-power : Value to use for DDR-Backup Power (default 0).

          This is a bitmask that specifies which DDR power
          rails need to be kept powered when backup mode is
          entered, for system suspend:
            - bit 0: DDR0
            - bit 1: DDR1
            - bit 2: DDR0C
            - bit 3: DDR1C
          These bits match the KEEPON_DDR* bits in the
          documentation for the "BKUP Mode Cnt" register.
  

• rohm,rstbmode-level: The RSTB signal is configured for level mode, to

       accommodate a toggle power switch (the RSTBMODE pin is
       strapped low).
  

• rohm,rstbmode-pulse: The RSTB signal is configured for pulse mode, to

       accommodate a momentary power switch (the RSTBMODE pin
       is strapped high).
       The two properties above are mutually exclusive.
  

Example:

pmic: pmic@30 {
    compatible = "rohm,bd9571mwv";
    reg = <0x30>;
    interrupt-parent = <&gpio2>;
    interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
    interrupt-controller;
    #interrupt-cells = <2>;
    gpio-controller;
    #gpio-cells = <2>;
    rohm,ddr-backup-power = <0xf>;
    rohm,rstbmode-pulse;

    regulators {
        dvfs: dvfs {
            regulator-name = "dvfs";
            regulator-min-microvolt = <750000>;
            regulator-max-microvolt = <1030000>;
            regulator-boot-on;
            regulator-always-on;
        };
    };
};