1 Kernel driver adt7411 1 Kernel driver adt7411
2 ===================== 2 =====================
3 3
4 Supported chips: 4 Supported chips:
5 5
6 * Analog Devices ADT7411 6 * Analog Devices ADT7411
7 7
8 Prefix: 'adt7411' 8 Prefix: 'adt7411'
9 9
10 Addresses scanned: 0x48, 0x4a, 0x4b 10 Addresses scanned: 0x48, 0x4a, 0x4b
11 11
12 Datasheet: Publicly available at the Analo 12 Datasheet: Publicly available at the Analog Devices website
13 13
14 Author: Wolfram Sang (based on adt7470 by Darr 14 Author: Wolfram Sang (based on adt7470 by Darrick J. Wong)
15 15
16 Description 16 Description
17 ----------- 17 -----------
18 18
19 This driver implements support for the Analog 19 This driver implements support for the Analog Devices ADT7411 chip. There may
20 be other chips that implement this interface. 20 be other chips that implement this interface.
21 21
22 The ADT7411 can use an I2C/SMBus compatible 2- 22 The ADT7411 can use an I2C/SMBus compatible 2-wire interface or an
23 SPI-compatible 4-wire interface. It provides a 23 SPI-compatible 4-wire interface. It provides a 10-bit analog to digital
24 converter which measures 1 temperature, vdd an 24 converter which measures 1 temperature, vdd and 8 input voltages. It has an
25 internal temperature sensor, but an external o 25 internal temperature sensor, but an external one can also be connected (one
26 loses 2 inputs then). There are high- and low- 26 loses 2 inputs then). There are high- and low-limit registers for all inputs.
27 27
28 Check the datasheet for details. 28 Check the datasheet for details.
29 29
30 sysfs-Interface 30 sysfs-Interface
31 --------------- 31 ---------------
32 32
33 ================ ================= 33 ================ =================
34 in0_input vdd voltage input 34 in0_input vdd voltage input
35 in[1-8]_input analog 1-8 input 35 in[1-8]_input analog 1-8 input
36 temp1_input temperature input 36 temp1_input temperature input
37 ================ ================= 37 ================ =================
38 38
39 Besides standard interfaces, this driver adds 39 Besides standard interfaces, this driver adds (0 = off, 1 = on):
40 40
41 ============== ============================= 41 ============== =======================================================
42 adc_ref_vdd Use vdd as reference instead 42 adc_ref_vdd Use vdd as reference instead of 2.25 V
43 fast_sampling Sample at 22.5 kHz instead of 43 fast_sampling Sample at 22.5 kHz instead of 1.4 kHz, but drop filters
44 no_average Turn off averaging over 16 sa 44 no_average Turn off averaging over 16 samples
45 ============== ============================= 45 ============== =======================================================
46 46
47 Notes 47 Notes
48 ----- 48 -----
49 49
50 SPI, external temperature sensor and limit reg 50 SPI, external temperature sensor and limit registers are not supported yet.
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