* 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>; };