1 ============================== 2 Cirrus Logic EP93xx ADC driver 3 ============================== 4 5 1. Overview 6 =========== 7 8 The driver is intended to work on both low-end (EP9301, EP9302) devices with 9 5-channel ADC and high-end (EP9307, EP9312, EP9315) devices with 10-channel 10 touchscreen/ADC module. 11 12 2. Channel numbering 13 ==================== 14 15 Numbering scheme for channels 0..4 is defined in EP9301 and EP9302 datasheets. 16 EP9307, EP9312 and EP9315 have 3 channels more (total 8), but the numbering is 17 not defined. So the last three are numbered randomly, let's say. 18 19 Assuming 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 +-----------------+---------------+
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