1 .. SPDX-License-Identifier: GPL-2.0-or-later
2
3 Kernel driver max127
4 ====================
5
6 Author:
7
8 * Tao Ren <rentao.bupt@gmail.com>
9
10 Supported chips:
11
12 * Maxim MAX127
13
14 Prefix: 'max127'
15
16 Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX127-MAX128.pdf
17
18 Description
19 -----------
20
21 The MAX127 is a multirange, 12-bit data acquisition system (DAS) providing
22 8 analog input channels that are independently software programmable for
23 a variety of ranges. The available ranges are {0,5V}, {0,10V}, {-5,5V}
24 and {-10,10V}.
25
26 The MAX127 features a 2-wire, I2C-compatible serial interface that allows
27 communication among multiple devices using SDA and SCL lines.
28
29 Sysfs interface
30 ---------------
31
32 ============== ==============================================================
33 in[0-7]_input The input voltage (in mV) of the corresponding channel.
34 RO
35
36 in[0-7]_min The lower input limit (in mV) for the corresponding channel.
37 ADC range and LSB will be updated when the limit is changed.
38 For the MAX127, it will be adjusted to -10000, -5000, or 0.
39 RW
40
41 in[0-7]_max The higher input limit (in mV) for the corresponding channel.
42 ADC range and LSB will be updated when the limit is changed.
43 For the MAX127, it will be adjusted to 0, 5000, or 10000.
44 RW
45 ============== ==============================================================
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