Documentation/iio/ep93xx_adc.rst
The driver is intended to work on both low-end (EP9301, EP9302) devices with 5-channel ADC and high-end (EP9307, EP9312, EP9315) devices with 10-channel touchscreen/ADC module.
Numbering scheme for channels 0..4 is defined in EP9301 and EP9302 datasheets. EP9307, EP9312 and EP9315 have 3 channels more (total 8), but the numbering is not defined. So the last three are numbered randomly, let's say.
Assuming ep93xx_adc is IIO device0, you'd find the following entries under /sys/bus/iio/devices/iio:device0/:
+-----------------+---------------+ | sysfs entry | ball/pin name | +=================+===============+ | in_voltage0_raw | YM | +-----------------+---------------+ | in_voltage1_raw | SXP | +-----------------+---------------+ | in_voltage2_raw | SXM | +-----------------+---------------+ | in_voltage3_raw | SYP | +-----------------+---------------+ | in_voltage4_raw | SYM | +-----------------+---------------+ | in_voltage5_raw | XP | +-----------------+---------------+ | in_voltage6_raw | XM | +-----------------+---------------+ | in_voltage7_raw | YP | +-----------------+---------------+