mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-30 16:13:54 +08:00
a5b79d62f2
2-Channel Temperature Monitor with Dual PWM Fan-Speed Controller Signed-off-by: Roland Stigge <stigge@antcom.de> Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
50 lines
2.2 KiB
Plaintext
50 lines
2.2 KiB
Plaintext
Kernel driver max6639
|
|
=====================
|
|
|
|
Supported chips:
|
|
* Maxim MAX6639
|
|
Prefix: 'max6639'
|
|
Addresses scanned: I2C 0x2c, 0x2e, 0x2f
|
|
Datasheet: http://pdfserv.maxim-ic.com/en/ds/MAX6639.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
|