1 Kernel driver adt7410 1 Kernel driver adt7410
2 ===================== 2 =====================
3 3
4 Supported chips: 4 Supported chips:
5 5
6 * Analog Devices ADT7410 6 * Analog Devices ADT7410
7 7
8 Prefix: 'adt7410' 8 Prefix: 'adt7410'
9 9
10 Addresses scanned: None 10 Addresses scanned: None
11 11
12 Datasheet: Publicly available at the Analo 12 Datasheet: Publicly available at the Analog Devices website
13 13
14 https://www.analog.com/static/i 14 https://www.analog.com/static/imported-files/data_sheets/ADT7410.pdf
15 * Analog Devices ADT7420 15 * Analog Devices ADT7420
16 16
17 Prefix: 'adt7420' 17 Prefix: 'adt7420'
18 18
19 Addresses scanned: None 19 Addresses scanned: None
20 20
21 Datasheet: Publicly available at the Analo 21 Datasheet: Publicly available at the Analog Devices website
22 22
23 https://www.analog.com/static/i 23 https://www.analog.com/static/imported-files/data_sheets/ADT7420.pdf
24 24
25 * Analog Devices ADT7310 25 * Analog Devices ADT7310
26 26
27 Prefix: 'adt7310' 27 Prefix: 'adt7310'
28 28
29 Addresses scanned: None 29 Addresses scanned: None
30 30
31 Datasheet: Publicly available at the Analo 31 Datasheet: Publicly available at the Analog Devices website
32 32
33 https://www.analog.com/static/i 33 https://www.analog.com/static/imported-files/data_sheets/ADT7310.pdf
34 34
35 * Analog Devices ADT7320 35 * Analog Devices ADT7320
36 36
37 Prefix: 'adt7320' 37 Prefix: 'adt7320'
38 38
39 Addresses scanned: None 39 Addresses scanned: None
40 40
41 Datasheet: Publicly available at the Analo 41 Datasheet: Publicly available at the Analog Devices website
42 42
43 https://www.analog.com/static/i 43 https://www.analog.com/static/imported-files/data_sheets/ADT7320.pdf
44 44
45 Author: Hartmut Knaack <knaack.h@gmx.de> 45 Author: Hartmut Knaack <knaack.h@gmx.de>
46 46
47 Description 47 Description
48 ----------- 48 -----------
49 49
50 The ADT7310/ADT7410 is a temperature sensor wi 50 The ADT7310/ADT7410 is a temperature sensor with rated temperature range of
51 -55°C to +150°C. It has a high accuracy of + 51 -55°C to +150°C. It has a high accuracy of +/-0.5°C and can be operated at a
52 resolution of 13 bits (0.0625°C) or 16 bits ( 52 resolution of 13 bits (0.0625°C) or 16 bits (0.0078°C). The sensor provides an
53 INT pin to indicate that a minimum or maximum 53 INT pin to indicate that a minimum or maximum temperature set point has been
54 exceeded, as well as a critical temperature (C 54 exceeded, as well as a critical temperature (CT) pin to indicate that the
55 critical temperature set point has been exceed 55 critical temperature set point has been exceeded. Both pins can be set up with a
56 common hysteresis of 0°C - 15°C and a fault 56 common hysteresis of 0°C - 15°C and a fault queue, ranging from 1 to 4 events.
57 Both pins can individually set to be active-lo 57 Both pins can individually set to be active-low or active-high, while the whole
58 device can either run in comparator mode or in 58 device can either run in comparator mode or interrupt mode. The ADT7410 supports
59 continuous temperature sampling, as well as sa 59 continuous temperature sampling, as well as sampling one temperature value per
60 second or even just get one sample on demand f 60 second or even just get one sample on demand for power saving. Besides, it can
61 completely power down its ADC, if power manage 61 completely power down its ADC, if power management is required.
62 62
63 The ADT7320/ADT7420 is register compatible, th 63 The ADT7320/ADT7420 is register compatible, the only differences being the
64 package, a slightly narrower operating tempera 64 package, a slightly narrower operating temperature range (-40°C to +150°C), and
65 a better accuracy (0.25°C instead of 0.50°C. 65 a better accuracy (0.25°C instead of 0.50°C.)
66 66
67 The difference between the ADT7310/ADT7320 and 67 The difference between the ADT7310/ADT7320 and ADT7410/ADT7420 is the control
68 interface, the ADT7310 and ADT7320 use SPI whi 68 interface, the ADT7310 and ADT7320 use SPI while the ADT7410 and ADT7420 use
69 I2C. 69 I2C.
70 70
71 Configuration Notes 71 Configuration Notes
72 ------------------- 72 -------------------
73 73
74 Since the device uses one hysteresis value, wh 74 Since the device uses one hysteresis value, which is an offset to minimum,
75 maximum and critical temperature, it can only 75 maximum and critical temperature, it can only be set for temp#_max_hyst.
76 However, temp#_min_hyst and temp#_crit_hyst sh 76 However, temp#_min_hyst and temp#_crit_hyst show their corresponding
77 hysteresis. 77 hysteresis.
78 The device is set to 16 bit resolution and com 78 The device is set to 16 bit resolution and comparator mode.
79 79
80 sysfs-Interface 80 sysfs-Interface
81 --------------- 81 ---------------
82 82
83 ======================== ===================== 83 ======================== ====================================================
84 temp#_input temperature input 84 temp#_input temperature input
85 temp#_min temperature minimum s 85 temp#_min temperature minimum setpoint
86 temp#_max temperature maximum s 86 temp#_max temperature maximum setpoint
87 temp#_crit critical temperature 87 temp#_crit critical temperature setpoint
88 temp#_min_hyst hysteresis for temper 88 temp#_min_hyst hysteresis for temperature minimum (read-only)
89 temp#_max_hyst hysteresis for temper 89 temp#_max_hyst hysteresis for temperature maximum (read/write)
90 temp#_crit_hyst hysteresis for critic 90 temp#_crit_hyst hysteresis for critical temperature (read-only)
91 temp#_min_alarm temperature minimum a 91 temp#_min_alarm temperature minimum alarm flag
92 temp#_max_alarm temperature maximum a 92 temp#_max_alarm temperature maximum alarm flag
93 temp#_crit_alarm critical temperature 93 temp#_crit_alarm critical temperature alarm flag
94 ======================== ===================== 94 ======================== ====================================================
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