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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | ============================== Cirrus Logic EP93xx ADC driver ============================== 1. Overview =========== 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. 2. Channel numbering ==================== 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 | +-----------------+---------------+ |