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Commit | Line | Data |
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8614206a AS |
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 | +-----------------+---------------+ |