1 Kernel driver emc1403
2 =====================
3
4 Supported chips:
5
6 * SMSC / Microchip EMC1402, EMC1412
7
8 Addresses scanned: I2C 0x18, 0x1c, 0x29, 0
9
10 Prefix: 'emc1402'
11
12 Datasheets:
13
14 - http://ww1.microchip.com/downloads/e
15 - https://ww1.microchip.com/downloads/
16
17 * SMSC / Microchip EMC1403, EMC1404, EMC1413
18
19 Addresses scanned: I2C 0x18, 0x29, 0x4c, 0
20
21 Prefix: 'emc1403', 'emc1404'
22
23 Datasheets:
24
25 - http://ww1.microchip.com/downloads/e
26 - http://ww1.microchip.com/downloads/e
27
28 * SMSC / Microchip EMC1422
29
30 Addresses scanned: I2C 0x4c
31
32 Prefix: 'emc1422'
33
34 Datasheet:
35
36 - https://ww1.microchip.com/downloads/
37
38 * SMSC / Microchip EMC1423, EMC1424
39
40 Addresses scanned: I2C 0x4c
41
42 Prefix: 'emc1423', 'emc1424'
43
44 Datasheet:
45
46 - https://ww1.microchip.com/downloads/
47
48 * SMSC / Microchip EMC1428, EMC1438
49
50 Addresses scanned: I2C 0x18, 0x4c, 0x4d
51
52 Prefix: 'emc1428', 'emc1438'
53
54 Datasheets:
55
56 - https://ww1.microchip.com/downloads/
57 - https://ww1.microchip.com/downloads/
58
59 Author:
60 Kalhan Trisal <kalhan.trisal@intel.com
61
62
63 Description
64 -----------
65
66 The Standard Microsystems Corporation (SMSC) /
67 contain up to eight temperature sensors. EMC14
68 (one internal, one external). EMC14x3 support
69 two external), EMC14x4 support four sensors (o
70 and EMC14x8 support eight sensors (one interna
71
72 The chips implement three limits for each sens
73 (tempX_max) and critical (tempX_crit.) The chi
74 hysteresis mechanism which applies to all limi
75 is stored in a single register on the chip, wh
76 difference between the limit and its hysteresi
77 all three limits.
78
79 This implementation detail implies the followi
80
81 * When setting a limit, its hysteresis will au
82 difference staying unchanged. For example, i
83 was 80 degrees C, and the hysteresis was 75
84 the critical limit to 90 degrees C, then the
85 automatically change to 85 degrees C.
86 * The hysteresis values can't be set independe
87 only temp1_crit_hyst writable, while all oth
88 are read-only. Setting temp1_crit_hyst write
89 temp1_crit_hyst and temp1_crit into the chip
90 hysteresis applies automatically to all othe
91 * The limits should be set before the hysteres
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