| ============================== |
| 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 EP9312 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 | |
| +-----------------+---------------+ |
