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authorstigge@antcom.de <stigge@antcom.de>2011-01-20 20:42:55 +0300
committerGuenter Roeck <guenter.roeck@ericsson.com>2011-03-15 08:36:24 +0300
commita5b79d62f2e6d1b0d44bcdafce46f47bf355b9fe (patch)
treedc918d8203b45d5dd4cd98e82ebd5f30bad0c94b /Documentation/hwmon
parent521cb40b0c44418a4fd36dc633f575813d59a43d (diff)
downloadlinux-a5b79d62f2e6d1b0d44bcdafce46f47bf355b9fe.tar.xz
hwmon: Driver for Maxim MAX6639
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>
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+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