Documentation/iio/ep93xx_adc.txt

   1 Cirrus Logic EP93xx ADC driver.
   2
   3 1. Overview
   4
   5 The driver is intended to work on both low-end (EP9301, EP9302) devices with
   6 5-channel ADC and high-end (EP9307, EP9312, EP9315) devices with 10-channel
   7 touchscreen/ADC module.
   8
   9 2. Channel numbering
  10
  11 Numbering scheme for channels 0..4 is defined in EP9301 and EP9302 datasheets.
  12 EP9307, EP9312 and EP9312 have 3 channels more (total 8), but the numbering is
  13 not defined. So the last three are numbered randomly, let's say.
  14
  15 Assuming ep93xx_adc is IIO device0, you'd find the following entries under
  16 /sys/bus/iio/devices/iio:device0/:
  17
  18   +-----------------+---------------+
  19   | sysfs entry     | ball/pin name |
  20   +-----------------+---------------+
  21   | in_voltage0_raw | YM            |
  22   | in_voltage1_raw | SXP           |
  23   | in_voltage2_raw | SXM           |
  24   | in_voltage3_raw | SYP           |
  25   | in_voltage4_raw | SYM           |
  26   | in_voltage5_raw | XP            |
  27   | in_voltage6_raw | XM            |
  28   | in_voltage7_raw | YP            |
  29   +-----------------+---------------+