projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| a5b79d62 | 1 | Kernel driver max6639 |
| 2 | ===================== | |
| 3 | ||
| 4 | Supported chips: | |
| b04f2f7d | 5 | |
| a5b79d62 | 6 | * Maxim MAX6639 |
| b04f2f7d | 7 | |
| a5b79d62 | 8 | Prefix: 'max6639' |
| b04f2f7d | 9 | |
| a5b79d62 | 10 | Addresses scanned: I2C 0x2c, 0x2e, 0x2f |
| b04f2f7d | 11 | |
| a5b79d62 | 12 | Datasheet: http://pdfserv.maxim-ic.com/en/ds/MAX6639.pdf |
| 13 | ||
| 14 | Authors: | |
| b04f2f7d MCC |
15 | - He Changqing <hechangqing@semptian.com> |
| 16 | - Roland Stigge <stigge@antcom.de> | |
| a5b79d62 | 17 | |
| 18 | Description | |
| 19 | ----------- | |
| 20 | ||
| 21 | This driver implements support for the Maxim MAX6639. This chip is a 2-channel | |
| 22 | temperature monitor with dual PWM fan speed controller. It can monitor its own | |
| 23 | temperature and one external diode-connected transistor or two external | |
| 24 | diode-connected transistors. | |
| 25 | ||
| 26 | The following device attributes are implemented via sysfs: | |
| 27 | ||
| b04f2f7d | 28 | ====================== ==== =================================================== |
| a5b79d62 | 29 | Attribute R/W Contents |
| b04f2f7d | 30 | ====================== ==== =================================================== |
| a5b79d62 | 31 | temp1_input R Temperature channel 1 input (0..150 C) |
| 32 | temp2_input R Temperature channel 2 input (0..150 C) | |
| 33 | temp1_fault R Temperature channel 1 diode fault | |
| 34 | temp2_fault R Temperature channel 2 diode fault | |
| 35 | temp1_max RW Set THERM temperature for input 1 | |
| b04f2f7d | 36 | (in C, see datasheet) |
| a5b79d62 | 37 | temp2_max RW Set THERM temperature for input 2 |
| 38 | temp1_crit RW Set ALERT temperature for input 1 | |
| 39 | temp2_crit RW Set ALERT temperature for input 2 | |
| 40 | temp1_emergency RW Set OT temperature for input 1 | |
| b04f2f7d | 41 | (in C, see datasheet) |
| a5b79d62 | 42 | temp2_emergency RW Set OT temperature for input 2 |
| 43 | pwm1 RW Fan 1 target duty cycle (0..255) | |
| 44 | pwm2 RW Fan 2 target duty cycle (0..255) | |
| 45 | fan1_input R TACH1 fan tachometer input (in RPM) | |
| 46 | fan2_input R TACH2 fan tachometer input (in RPM) | |
| 47 | fan1_fault R Fan 1 fault | |
| 48 | fan2_fault R Fan 2 fault | |
| 49 | temp1_max_alarm R Alarm on THERM temperature on channel 1 | |
| 50 | temp2_max_alarm R Alarm on THERM temperature on channel 2 | |
| 51 | temp1_crit_alarm R Alarm on ALERT temperature on channel 1 | |
| 52 | temp2_crit_alarm R Alarm on ALERT temperature on channel 2 | |
| 53 | temp1_emergency_alarm R Alarm on OT temperature on channel 1 | |
| 54 | temp2_emergency_alarm R Alarm on OT temperature on channel 2 | |
| b04f2f7d | 55 | ====================== ==== =================================================== |