1* Freescale MXS LRADC device driver
2
3Required properties:
4- compatible: Should be "fsl,imx23-lradc" for i.MX23 SoC and "fsl,imx28-lradc"
5              for i.MX28 SoC
6- reg: Address and length of the register set for the device
7- interrupts: Should contain the LRADC interrupts
8
9Optional properties:
10- fsl,lradc-touchscreen-wires: Number of wires used to connect the touchscreen
11                               to LRADC. Valid value is either 4 or 5. If this
12                               property is not present, then the touchscreen is
13                               disabled. 5 wires is valid for i.MX28 SoC only.
14- fsl,ave-ctrl: number of samples per direction to calculate an average value.
15                Allowed value is 1 ... 32, default is 4
16- fsl,ave-delay: delay between consecutive samples. Allowed value is
17                 2 ... 2048. It is used if 'fsl,ave-ctrl' > 1, counts at
18                 2 kHz and its default is 2 (= 1 ms)
19- fsl,settling: delay between plate switch to next sample. Allowed value is
20                1 ... 2047. It counts at 2 kHz and its default is
21                10 (= 5 ms)
22
23Example for i.MX23 SoC:
24
25	lradc@80050000 {
26		compatible = "fsl,imx23-lradc";
27		reg = <0x80050000 0x2000>;
28		interrupts = <36 37 38 39 40 41 42 43 44>;
29		fsl,lradc-touchscreen-wires = <4>;
30		fsl,ave-ctrl = <4>;
31		fsl,ave-delay = <2>;
32		fsl,settling = <10>;
33	};
34
35Example for i.MX28 SoC:
36
37	lradc@80050000 {
38		compatible = "fsl,imx28-lradc";
39		reg = <0x80050000 0x2000>;
40		interrupts = <10 14 15 16 17 18 19 20 21 22 23 24 25>;
41		fsl,lradc-touchscreen-wires = <5>;
42		fsl,ave-ctrl = <4>;
43		fsl,ave-delay = <2>;
44		fsl,settling = <10>;
45	};
46