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>
49 lines
2.2 KiB
Text
49 lines
2.2 KiB
Text
Kernel driver max6639
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=====================
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Supported chips:
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* Maxim MAX6639
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Prefix: 'max6639'
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Addresses scanned: I2C 0x2c, 0x2e, 0x2f
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Datasheet: http://pdfserv.maxim-ic.com/en/ds/MAX6639.pdf
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Authors:
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He Changqing <hechangqing@semptian.com>
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Roland Stigge <stigge@antcom.de>
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Description
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-----------
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This driver implements support for the Maxim MAX6639. This chip is a 2-channel
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temperature monitor with dual PWM fan speed controller. It can monitor its own
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temperature and one external diode-connected transistor or two external
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diode-connected transistors.
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The following device attributes are implemented via sysfs:
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Attribute R/W Contents
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----------------------------------------------------------------------------
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temp1_input R Temperature channel 1 input (0..150 C)
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temp2_input R Temperature channel 2 input (0..150 C)
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temp1_fault R Temperature channel 1 diode fault
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temp2_fault R Temperature channel 2 diode fault
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temp1_max RW Set THERM temperature for input 1
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(in C, see datasheet)
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temp2_max RW Set THERM temperature for input 2
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temp1_crit RW Set ALERT temperature for input 1
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temp2_crit RW Set ALERT temperature for input 2
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temp1_emergency RW Set OT temperature for input 1
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(in C, see datasheet)
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temp2_emergency RW Set OT temperature for input 2
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pwm1 RW Fan 1 target duty cycle (0..255)
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pwm2 RW Fan 2 target duty cycle (0..255)
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fan1_input R TACH1 fan tachometer input (in RPM)
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fan2_input R TACH2 fan tachometer input (in RPM)
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fan1_fault R Fan 1 fault
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fan2_fault R Fan 2 fault
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temp1_max_alarm R Alarm on THERM temperature on channel 1
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temp2_max_alarm R Alarm on THERM temperature on channel 2
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temp1_crit_alarm R Alarm on ALERT temperature on channel 1
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temp2_crit_alarm R Alarm on ALERT temperature on channel 2
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temp1_emergency_alarm R Alarm on OT temperature on channel 1
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temp2_emergency_alarm R Alarm on OT temperature on channel 2
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