projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 12d36c83 TR |
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 | ============== ============================================================== |