1============================== 2Cirrus Logic EP93xx ADC driver 3============================== 4 51. Overview 6=========== 7 8The driver is intended to work on both low-end (EP9301, EP9302) devices with 95-channel ADC and high-end (EP9307, EP9312, EP9315) devices with 10-channel 10touchscreen/ADC module. 11 122. Channel numbering 13==================== 14 15Numbering scheme for channels 0..4 is defined in EP9301 and EP9302 datasheets. 16EP9307, EP9312 and EP9312 have 3 channels more (total 8), but the numbering is 17not defined. So the last three are numbered randomly, let's say. 18 19Assuming ep93xx_adc is IIO device0, you'd find the following entries under 20/sys/bus/iio/devices/iio:device0/: 21 22 +-----------------+---------------+ 23 | sysfs entry | ball/pin name | 24 +=================+===============+ 25 | in_voltage0_raw | YM | 26 +-----------------+---------------+ 27 | in_voltage1_raw | SXP | 28 +-----------------+---------------+ 29 | in_voltage2_raw | SXM | 30 +-----------------+---------------+ 31 | in_voltage3_raw | SYP | 32 +-----------------+---------------+ 33 | in_voltage4_raw | SYM | 34 +-----------------+---------------+ 35 | in_voltage5_raw | XP | 36 +-----------------+---------------+ 37 | in_voltage6_raw | XM | 38 +-----------------+---------------+ 39 | in_voltage7_raw | YP | 40 +-----------------+---------------+ 41