| David George | 731b4ca | 2011-06-02 08:43:45 -0700 | [diff] [blame] | 1 | Kernel driver max1668 |
| 2 | ===================== |
| 3 | |
| 4 | Supported chips: |
| 5 | * Maxim MAX1668, MAX1805 and MAX1989 |
| 6 | Prefix: 'max1668' |
| 7 | Addresses scanned: I2C 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e |
| 8 | Datasheet: http://datasheets.maxim-ic.com/en/ds/MAX1668-MAX1989.pdf |
| 9 | |
| 10 | Author: |
| 11 | David George <david.george@ska.ac.za> |
| 12 | |
| 13 | Description |
| 14 | ----------- |
| 15 | |
| 16 | This driver implements support for the Maxim MAX1668, MAX1805 and MAX1989 |
| 17 | chips. |
| 18 | |
| 19 | The three devices are very similar, but the MAX1805 has a reduced feature |
| 20 | set; only two remote temperature inputs vs the four avaible on the other |
| 21 | two ICs. |
| 22 | |
| 23 | The driver is able to distinguish between the devices and creates sysfs |
| 24 | entries as follows: |
| 25 | |
| 26 | MAX1805, MAX1668 and MAX1989: |
| 27 | |
| 28 | temp1_input ro local (ambient) temperature |
| 29 | temp1_max rw local temperature maximum threshold for alarm |
| 30 | temp1_max_alarm ro local temperature maximum threshold alarm |
| 31 | temp1_min rw local temperature minimum threshold for alarm |
| 32 | temp1_min_alarm ro local temperature minimum threshold alarm |
| 33 | temp2_input ro remote temperature 1 |
| 34 | temp2_max rw remote temperature 1 maximum threshold for alarm |
| 35 | temp2_max_alarm ro remote temperature 1 maximum threshold alarm |
| 36 | temp2_min rw remote temperature 1 minimum threshold for alarm |
| 37 | temp2_min_alarm ro remote temperature 1 minimum threshold alarm |
| 38 | temp3_input ro remote temperature 2 |
| 39 | temp3_max rw remote temperature 2 maximum threshold for alarm |
| 40 | temp3_max_alarm ro remote temperature 2 maximum threshold alarm |
| 41 | temp3_min rw remote temperature 2 minimum threshold for alarm |
| 42 | temp3_min_alarm ro remote temperature 2 minimum threshold alarm |
| 43 | |
| 44 | MAX1668 and MAX1989 only: |
| 45 | temp4_input ro remote temperature 3 |
| 46 | temp4_max rw remote temperature 3 maximum threshold for alarm |
| 47 | temp4_max_alarm ro remote temperature 3 maximum threshold alarm |
| 48 | temp4_min rw remote temperature 3 minimum threshold for alarm |
| 49 | temp4_min_alarm ro remote temperature 3 minimum threshold alarm |
| 50 | temp5_input ro remote temperature 4 |
| 51 | temp5_max rw remote temperature 4 maximum threshold for alarm |
| 52 | temp5_max_alarm ro remote temperature 4 maximum threshold alarm |
| 53 | temp5_min rw remote temperature 4 minimum threshold for alarm |
| 54 | temp5_min_alarm ro remote temperature 4 minimum threshold alarm |
| 55 | |
| 56 | Module Parameters |
| 57 | ----------------- |
| 58 | |
| 59 | * read_only: int |
| 60 | Set to non-zero if you wish to prevent write access to alarm thresholds. |