1* TI - TSC ADC (Touschscreen and analog digital converter) 2~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 3 4Required properties: 5- child "tsc" 6 ti,wires: Wires refer to application modes i.e. 4/5/8 wire touchscreen 7 support on the platform. 8 ti,x-plate-resistance: X plate resistance 9 ti,coordiante-readouts: The sequencer supports a total of 16 10 programmable steps each step is used to 11 read a single coordinate. A single 12 readout is enough but multiple reads can 13 increase the quality. 14 A value of 5 means, 5 reads for X, 5 for 15 Y and 2 for Z (always). This utilises 12 16 of the 16 software steps available. The 17 remaining 4 can be used by the ADC. 18 ti,wire-config: Different boards could have a different order for 19 connecting wires on touchscreen. We need to provide an 20 8 bit number where in the 1st four bits represent the 21 analog lines and the next 4 bits represent positive/ 22 negative terminal on that input line. Notations to 23 represent the input lines and terminals resoectively 24 is as follows: 25 AIN0 = 0, AIN1 = 1 and so on till AIN7 = 7. 26 XP = 0, XN = 1, YP = 2, YN = 3. 27- child "adc" 28 ti,adc-channels: List of analog inputs available for ADC. 29 AIN0 = 0, AIN1 = 1 and so on till AIN7 = 7. 30 31Example: 32 tscadc: tscadc@44e0d000 { 33 compatible = "ti,am3359-tscadc"; 34 tsc { 35 ti,wires = <4>; 36 ti,x-plate-resistance = <200>; 37 ti,coordiante-readouts = <5>; 38 ti,wire-config = <0x00 0x11 0x22 0x33>; 39 }; 40 41 adc { 42 ti,adc-channels = <4 5 6 7>; 43 }; 44 } 45