1Kernel driver max1668
 2=====================
 3
 4Supported chips:
 5
 6  * Maxim MAX1668, MAX1805 and MAX1989
 7
 8    Prefix: 'max1668'
 9
10    Addresses scanned: I2C 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e
11
12    Datasheet: http://datasheets.maxim-ic.com/en/ds/MAX1668-MAX1989.pdf
13
14Author:
15
16    David George <david.george@ska.ac.za>
17
18Description
19-----------
20
21This driver implements support for the Maxim MAX1668, MAX1805 and MAX1989
22chips.
23
24The three devices are very similar, but the MAX1805 has a reduced feature
25set; only two remote temperature inputs vs the four available on the other
26two ICs.
27
28The driver is able to distinguish between the devices and creates sysfs
29entries as follows:
30
31- MAX1805, MAX1668 and MAX1989:
32
33=============== == ============================================================
34temp1_input     ro local (ambient) temperature
35temp1_max       rw local temperature maximum threshold for alarm
36temp1_max_alarm ro local temperature maximum threshold alarm
37temp1_min       rw local temperature minimum threshold for alarm
38temp1_min_alarm ro local temperature minimum threshold alarm
39temp2_input     ro remote temperature 1
40temp2_max       rw remote temperature 1 maximum threshold for alarm
41temp2_max_alarm ro remote temperature 1 maximum threshold alarm
42temp2_min       rw remote temperature 1 minimum threshold for alarm
43temp2_min_alarm ro remote temperature 1 minimum threshold alarm
44temp3_input     ro remote temperature 2
45temp3_max       rw remote temperature 2 maximum threshold for alarm
46temp3_max_alarm ro remote temperature 2 maximum threshold alarm
47temp3_min       rw remote temperature 2 minimum threshold for alarm
48temp3_min_alarm ro remote temperature 2 minimum threshold alarm
49=============== == ============================================================
50
51- MAX1668 and MAX1989 only:
52
53=============== == ============================================================
54temp4_input     ro remote temperature 3
55temp4_max       rw remote temperature 3 maximum threshold for alarm
56temp4_max_alarm ro remote temperature 3 maximum threshold alarm
57temp4_min       rw remote temperature 3 minimum threshold for alarm
58temp4_min_alarm ro remote temperature 3 minimum threshold alarm
59temp5_input     ro remote temperature 4
60temp5_max       rw remote temperature 4 maximum threshold for alarm
61temp5_max_alarm ro remote temperature 4 maximum threshold alarm
62temp5_min       rw remote temperature 4 minimum threshold for alarm
63temp5_min_alarm ro remote temperature 4 minimum threshold alarm
64=============== == ============================================================
65
66Module Parameters
67-----------------
68
69* read_only: int
70  Set to non-zero if you wish to prevent write access to alarm thresholds.