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