max1668.rst (2719B)
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.