1 Kernel driver max1668 1 Kernel driver max1668
2 ===================== 2 =====================
3 3
4 Supported chips: 4 Supported chips:
5 5
6 * Maxim MAX1668, MAX1805 and MAX1989 6 * Maxim MAX1668, MAX1805 and MAX1989
7 7
8 Prefix: 'max1668' 8 Prefix: 'max1668'
9 9
10 Addresses scanned: I2C 0x18, 0x19, 0x1a, 0 10 Addresses scanned: I2C 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e
11 11
12 Datasheet: http://datasheets.maxim-ic.com/ 12 Datasheet: http://datasheets.maxim-ic.com/en/ds/MAX1668-MAX1989.pdf
13 13
14 Author: 14 Author:
15 15
16 David George <david.george@ska.ac.za> 16 David George <david.george@ska.ac.za>
17 17
18 Description 18 Description
19 ----------- 19 -----------
20 20
21 This driver implements support for the Maxim M 21 This driver implements support for the Maxim MAX1668, MAX1805 and MAX1989
22 chips. 22 chips.
23 23
24 The three devices are very similar, but the MA 24 The three devices are very similar, but the MAX1805 has a reduced feature
25 set; only two remote temperature inputs vs the 25 set; only two remote temperature inputs vs the four available on the other
26 two ICs. 26 two ICs.
27 27
28 The driver is able to distinguish between the 28 The driver is able to distinguish between the devices and creates sysfs
29 entries as follows: 29 entries as follows:
30 30
31 - MAX1805, MAX1668 and MAX1989: 31 - MAX1805, MAX1668 and MAX1989:
32 32
33 =============== == =========================== 33 =============== == ============================================================
34 temp1_input ro local (ambient) temperature 34 temp1_input ro local (ambient) temperature
35 temp1_max rw local temperature maximum t 35 temp1_max rw local temperature maximum threshold for alarm
36 temp1_max_alarm ro local temperature maximum t 36 temp1_max_alarm ro local temperature maximum threshold alarm
37 temp1_min rw local temperature minimum t 37 temp1_min rw local temperature minimum threshold for alarm
38 temp1_min_alarm ro local temperature minimum t 38 temp1_min_alarm ro local temperature minimum threshold alarm
39 temp2_input ro remote temperature 1 39 temp2_input ro remote temperature 1
40 temp2_max rw remote temperature 1 maximu 40 temp2_max rw remote temperature 1 maximum threshold for alarm
41 temp2_max_alarm ro remote temperature 1 maximu 41 temp2_max_alarm ro remote temperature 1 maximum threshold alarm
42 temp2_min rw remote temperature 1 minimu 42 temp2_min rw remote temperature 1 minimum threshold for alarm
43 temp2_min_alarm ro remote temperature 1 minimu 43 temp2_min_alarm ro remote temperature 1 minimum threshold alarm
44 temp3_input ro remote temperature 2 44 temp3_input ro remote temperature 2
45 temp3_max rw remote temperature 2 maximu 45 temp3_max rw remote temperature 2 maximum threshold for alarm
46 temp3_max_alarm ro remote temperature 2 maximu 46 temp3_max_alarm ro remote temperature 2 maximum threshold alarm
47 temp3_min rw remote temperature 2 minimu 47 temp3_min rw remote temperature 2 minimum threshold for alarm
48 temp3_min_alarm ro remote temperature 2 minimu 48 temp3_min_alarm ro remote temperature 2 minimum threshold alarm
49 =============== == =========================== 49 =============== == ============================================================
50 50
51 - MAX1668 and MAX1989 only: 51 - MAX1668 and MAX1989 only:
52 52
53 =============== == =========================== 53 =============== == ============================================================
54 temp4_input ro remote temperature 3 54 temp4_input ro remote temperature 3
55 temp4_max rw remote temperature 3 maximu 55 temp4_max rw remote temperature 3 maximum threshold for alarm
56 temp4_max_alarm ro remote temperature 3 maximu 56 temp4_max_alarm ro remote temperature 3 maximum threshold alarm
57 temp4_min rw remote temperature 3 minimu 57 temp4_min rw remote temperature 3 minimum threshold for alarm
58 temp4_min_alarm ro remote temperature 3 minimu 58 temp4_min_alarm ro remote temperature 3 minimum threshold alarm
59 temp5_input ro remote temperature 4 59 temp5_input ro remote temperature 4
60 temp5_max rw remote temperature 4 maximu 60 temp5_max rw remote temperature 4 maximum threshold for alarm
61 temp5_max_alarm ro remote temperature 4 maximu 61 temp5_max_alarm ro remote temperature 4 maximum threshold alarm
62 temp5_min rw remote temperature 4 minimu 62 temp5_min rw remote temperature 4 minimum threshold for alarm
63 temp5_min_alarm ro remote temperature 4 minimu 63 temp5_min_alarm ro remote temperature 4 minimum threshold alarm
64 =============== == =========================== 64 =============== == ============================================================
65 65
66 Module Parameters 66 Module Parameters
67 ----------------- 67 -----------------
68 68
69 * read_only: int 69 * read_only: int
70 Set to non-zero if you wish to prevent write 70 Set to non-zero if you wish to prevent write access to alarm thresholds.
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