diff options
Diffstat (limited to 'Documentation/hwmon/max6639.rst')
| -rw-r--r-- | Documentation/hwmon/max6639.rst | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/Documentation/hwmon/max6639.rst b/Documentation/hwmon/max6639.rst new file mode 100644 index 000000000..c85d285a3 --- /dev/null +++ b/Documentation/hwmon/max6639.rst @@ -0,0 +1,55 @@ +Kernel driver max6639 +===================== + +Supported chips: + + * Maxim MAX6639 + + Prefix: 'max6639' + + Addresses scanned: I2C 0x2c, 0x2e, 0x2f + + Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX6639-MAX6639F.pdf + +Authors: + - He Changqing <hechangqing@semptian.com> + - Roland Stigge <stigge@antcom.de> + +Description +----------- + +This driver implements support for the Maxim MAX6639. This chip is a 2-channel +temperature monitor with dual PWM fan speed controller. It can monitor its own +temperature and one external diode-connected transistor or two external +diode-connected transistors. + +The following device attributes are implemented via sysfs: + +====================== ==== =================================================== +Attribute R/W Contents +====================== ==== =================================================== +temp1_input R Temperature channel 1 input (0..150 C) +temp2_input R Temperature channel 2 input (0..150 C) +temp1_fault R Temperature channel 1 diode fault +temp2_fault R Temperature channel 2 diode fault +temp1_max RW Set THERM temperature for input 1 + (in C, see datasheet) +temp2_max RW Set THERM temperature for input 2 +temp1_crit RW Set ALERT temperature for input 1 +temp2_crit RW Set ALERT temperature for input 2 +temp1_emergency RW Set OT temperature for input 1 + (in C, see datasheet) +temp2_emergency RW Set OT temperature for input 2 +pwm1 RW Fan 1 target duty cycle (0..255) +pwm2 RW Fan 2 target duty cycle (0..255) +fan1_input R TACH1 fan tachometer input (in RPM) +fan2_input R TACH2 fan tachometer input (in RPM) +fan1_fault R Fan 1 fault +fan2_fault R Fan 2 fault +temp1_max_alarm R Alarm on THERM temperature on channel 1 +temp2_max_alarm R Alarm on THERM temperature on channel 2 +temp1_crit_alarm R Alarm on ALERT temperature on channel 1 +temp2_crit_alarm R Alarm on ALERT temperature on channel 2 +temp1_emergency_alarm R Alarm on OT temperature on channel 1 +temp2_emergency_alarm R Alarm on OT temperature on channel 2 +====================== ==== =================================================== |