projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 731b4cac DG |
1 | Kernel driver max1668 |
| 2 | ===================== | |
| 3 | ||
| 4 | Supported chips: | |
| b04f2f7d | 5 | |
| 731b4cac | 6 | * Maxim MAX1668, MAX1805 and MAX1989 |
| b04f2f7d | 7 | |
| 731b4cac | 8 | Prefix: 'max1668' |
| b04f2f7d | 9 | |
| 731b4cac | 10 | Addresses scanned: I2C 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e |
| b04f2f7d | 11 | |
| 731b4cac DG |
12 | Datasheet: http://datasheets.maxim-ic.com/en/ds/MAX1668-MAX1989.pdf |
| 13 | ||
| 14 | Author: | |
| b04f2f7d | 15 | |
| 731b4cac DG |
16 | David George <david.george@ska.ac.za> |
| 17 | ||
| 18 | Description | |
| 19 | ----------- | |
| 20 | ||
| 21 | This driver implements support for the Maxim MAX1668, MAX1805 and MAX1989 | |
| 22 | chips. | |
| 23 | ||
| 24 | The three devices are very similar, but the MAX1805 has a reduced feature | |
| 76b5808e | 25 | set; only two remote temperature inputs vs the four available on the other |
| 731b4cac DG |
26 | two ICs. |
| 27 | ||
| 28 | The driver is able to distinguish between the devices and creates sysfs | |
| 29 | entries as follows: | |
| 30 | ||
| b04f2f7d | 31 | - MAX1805, MAX1668 and MAX1989: |
| 731b4cac | 32 | |
| b04f2f7d | 33 | =============== == ============================================================ |
| 731b4cac DG |
34 | temp1_input ro local (ambient) temperature |
| 35 | temp1_max rw local temperature maximum threshold for alarm | |
| 36 | temp1_max_alarm ro local temperature maximum threshold alarm | |
| 37 | temp1_min rw local temperature minimum threshold for alarm | |
| 38 | temp1_min_alarm ro local temperature minimum threshold alarm | |
| 39 | temp2_input ro remote temperature 1 | |
| 40 | temp2_max rw remote temperature 1 maximum threshold for alarm | |
| 41 | temp2_max_alarm ro remote temperature 1 maximum threshold alarm | |
| 42 | temp2_min rw remote temperature 1 minimum threshold for alarm | |
| 43 | temp2_min_alarm ro remote temperature 1 minimum threshold alarm | |
| 44 | temp3_input ro remote temperature 2 | |
| 45 | temp3_max rw remote temperature 2 maximum threshold for alarm | |
| 46 | temp3_max_alarm ro remote temperature 2 maximum threshold alarm | |
| 47 | temp3_min rw remote temperature 2 minimum threshold for alarm | |
| 48 | temp3_min_alarm ro remote temperature 2 minimum threshold alarm | |
| b04f2f7d MCC |
49 | =============== == ============================================================ |
| 50 | ||
| 51 | - MAX1668 and MAX1989 only: | |
| 731b4cac | 52 | |
| b04f2f7d | 53 | =============== == ============================================================ |
| 731b4cac DG |
54 | temp4_input ro remote temperature 3 |
| 55 | temp4_max rw remote temperature 3 maximum threshold for alarm | |
| 56 | temp4_max_alarm ro remote temperature 3 maximum threshold alarm | |
| 57 | temp4_min rw remote temperature 3 minimum threshold for alarm | |
| 58 | temp4_min_alarm ro remote temperature 3 minimum threshold alarm | |
| 59 | temp5_input ro remote temperature 4 | |
| 60 | temp5_max rw remote temperature 4 maximum threshold for alarm | |
| 61 | temp5_max_alarm ro remote temperature 4 maximum threshold alarm | |
| 62 | temp5_min rw remote temperature 4 minimum threshold for alarm | |
| 63 | temp5_min_alarm ro remote temperature 4 minimum threshold alarm | |
| b04f2f7d | 64 | =============== == ============================================================ |
| 731b4cac DG |
65 | |
| 66 | Module Parameters | |
| 67 | ----------------- | |
| 68 | ||
| 69 | * read_only: int | |
| 70 | Set to non-zero if you wish to prevent write access to alarm thresholds. |