Kernel-4.18.0-80.el8_mxs-lradc

• Freescale MXS LRADC device driver

Required properties:

• compatible: Should be “fsl,imx23-lradc” for i.MX23 SoC and “fsl,imx28-lradc”

          for i.MX28 SoC
  

• reg: Address and length of the register set for the device
• interrupts: Should contain the LRADC interrupts

Optional properties:

• fsl,lradc-touchscreen-wires: Number of wires used to connect the touchscreen

                           to LRADC. Valid value is either 4 or 5. If this
                           property is not present, then the touchscreen is
                           disabled. 5 wires is valid for i.MX28 SoC only.
  

• fsl,ave-ctrl: number of samples per direction to calculate an average value.

            Allowed value is 1 ... 32, default is 4
  

• fsl,ave-delay: delay between consecutive samples. Allowed value is

             2 ... 2048. It is used if 'fsl,ave-ctrl' > 1, counts at
             2 kHz and its default is 2 (= 1 ms)
  

• fsl,settling: delay between plate switch to next sample. Allowed value is

            1 ... 2047. It counts at 2 kHz and its default is
            10 (= 5 ms)
  

Example for i.MX23 SoC:

lradc@80050000 {
    compatible = "fsl,imx23-lradc";
    reg = <0x80050000 0x2000>;
    interrupts = <36 37 38 39 40 41 42 43 44>;
    fsl,lradc-touchscreen-wires = <4>;
    fsl,ave-ctrl = <4>;
    fsl,ave-delay = <2>;
    fsl,settling = <10>;
};

Example for i.MX28 SoC:

lradc@80050000 {
    compatible = "fsl,imx28-lradc";
    reg = <0x80050000 0x2000>;
    interrupts = <10 14 15 16 17 18 19 20 21 22 23 24 25>;
    fsl,lradc-touchscreen-wires = <5>;
    fsl,ave-ctrl = <4>;
    fsl,ave-delay = <2>;
    fsl,settling = <10>;
};