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- ==============================
- 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 |
- +-----------------+---------------+
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