1*4882a593Smuzhiyun* Freescale MXS LRADC device driver 2*4882a593Smuzhiyun 3*4882a593SmuzhiyunRequired properties: 4*4882a593Smuzhiyun- compatible: Should be "fsl,imx23-lradc" for i.MX23 SoC and "fsl,imx28-lradc" 5*4882a593Smuzhiyun for i.MX28 SoC 6*4882a593Smuzhiyun- reg: Address and length of the register set for the device 7*4882a593Smuzhiyun- interrupts: Should contain the LRADC interrupts 8*4882a593Smuzhiyun 9*4882a593SmuzhiyunOptional properties: 10*4882a593Smuzhiyun- fsl,lradc-touchscreen-wires: Number of wires used to connect the touchscreen 11*4882a593Smuzhiyun to LRADC. Valid value is either 4 or 5. If this 12*4882a593Smuzhiyun property is not present, then the touchscreen is 13*4882a593Smuzhiyun disabled. 5 wires is valid for i.MX28 SoC only. 14*4882a593Smuzhiyun- fsl,ave-ctrl: number of samples per direction to calculate an average value. 15*4882a593Smuzhiyun Allowed value is 1 ... 32, default is 4 16*4882a593Smuzhiyun- fsl,ave-delay: delay between consecutive samples. Allowed value is 17*4882a593Smuzhiyun 2 ... 2048. It is used if 'fsl,ave-ctrl' > 1, counts at 18*4882a593Smuzhiyun 2 kHz and its default is 2 (= 1 ms) 19*4882a593Smuzhiyun- fsl,settling: delay between plate switch to next sample. Allowed value is 20*4882a593Smuzhiyun 1 ... 2047. It counts at 2 kHz and its default is 21*4882a593Smuzhiyun 10 (= 5 ms) 22*4882a593Smuzhiyun 23*4882a593SmuzhiyunExample for i.MX23 SoC: 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun lradc@80050000 { 26*4882a593Smuzhiyun compatible = "fsl,imx23-lradc"; 27*4882a593Smuzhiyun reg = <0x80050000 0x2000>; 28*4882a593Smuzhiyun interrupts = <36 37 38 39 40 41 42 43 44>; 29*4882a593Smuzhiyun fsl,lradc-touchscreen-wires = <4>; 30*4882a593Smuzhiyun fsl,ave-ctrl = <4>; 31*4882a593Smuzhiyun fsl,ave-delay = <2>; 32*4882a593Smuzhiyun fsl,settling = <10>; 33*4882a593Smuzhiyun }; 34*4882a593Smuzhiyun 35*4882a593SmuzhiyunExample for i.MX28 SoC: 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun lradc@80050000 { 38*4882a593Smuzhiyun compatible = "fsl,imx28-lradc"; 39*4882a593Smuzhiyun reg = <0x80050000 0x2000>; 40*4882a593Smuzhiyun interrupts = <10 14 15 16 17 18 19 20 21 22 23 24 25>; 41*4882a593Smuzhiyun fsl,lradc-touchscreen-wires = <5>; 42*4882a593Smuzhiyun fsl,ave-ctrl = <4>; 43*4882a593Smuzhiyun fsl,ave-delay = <2>; 44*4882a593Smuzhiyun fsl,settling = <10>; 45*4882a593Smuzhiyun }; 46