Kernel-4.18.0-80.el8_i2c-sunxi-p2wi

• Allwinner P2WI (Push/Pull 2 Wire Interface) controller

Required properties :

• reg : Offset and length of the register set for the device.
• compatible : Should one of the following:

                - "allwinner,sun6i-a31-p2wi"
  

• interrupts : The interrupt line connected to the P2WI peripheral.
• clocks : The gate clk connected to the P2WI peripheral.
• resets : The reset line connected to the P2WI peripheral.

Optional properties :

• clock-frequency : Desired P2WI bus clock frequency in Hz. If not set the
  default frequency is 100kHz

A P2WI may contain one child node encoding a P2WI slave device.

Slave device properties:
Required properties:

• reg : the I2C slave address used during the initialization

              process to switch from I2C to P2WI mode
  

Example:

p2wi@1f03400 {
    compatible = "allwinner,sun6i-a31-p2wi";
    reg = <0x01f03400 0x400>;
    interrupts = <0 39 4>;
    clocks = <&apb0_gates 3>;
    clock-frequency = <6000000>;
    resets = <&apb0_rst 3>;

    axp221: pmic@68 {
        compatible = "x-powers,axp221";
        reg = <0x68>;

        /* ... */
    };
};