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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. | ||