| Wolfram Sang | d84ca5b | 2010-03-05 22:17:23 +0100 | [diff] [blame] | 1 | Kernel driver adt7411 |
| 2 | ===================== |
| 3 | |
| 4 | Supported chips: |
| 5 | * Analog Devices ADT7411 |
| 6 | Prefix: 'adt7411' |
| 7 | Addresses scanned: 0x48, 0x4a, 0x4b |
| 8 | Datasheet: Publicly available at the Analog Devices website |
| 9 | |
| 10 | Author: Wolfram Sang (based on adt7470 by Darrick J. Wong) |
| 11 | |
| 12 | Description |
| 13 | ----------- |
| 14 | |
| 15 | This driver implements support for the Analog Devices ADT7411 chip. There may |
| 16 | be other chips that implement this interface. |
| 17 | |
| 18 | The ADT7411 can use an I2C/SMBus compatible 2-wire interface or an |
| 19 | SPI-compatible 4-wire interface. It provides a 10-bit analog to digital |
| 20 | converter which measures 1 temperature, vdd and 8 input voltages. It has an |
| 21 | internal temperature sensor, but an external one can also be connected (one |
| 22 | loses 2 inputs then). There are high- and low-limit registers for all inputs. |
| 23 | |
| 24 | Check the datasheet for details. |
| 25 | |
| 26 | sysfs-Interface |
| 27 | --------------- |
| 28 | |
| 29 | in0_input - vdd voltage input |
| 30 | in[1-8]_input - analog 1-8 input |
| 31 | temp1_input - temperature input |
| 32 | |
| 33 | Besides standard interfaces, this driver adds (0 = off, 1 = on): |
| 34 | |
| 35 | adc_ref_vdd - Use vdd as reference instead of 2.25 V |
| 36 | fast_sampling - Sample at 22.5 kHz instead of 1.4 kHz, but drop filters |
| 37 | no_average - Turn off averaging over 16 samples |
| 38 | |
| 39 | Notes |
| 40 | ----- |
| 41 | |
| 42 | SPI, external temperature sensor and limit registers are not supported yet. |