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https://github.com/torvalds/linux
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88 lines
2.5 KiB
Text
88 lines
2.5 KiB
Text
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This describes the interface for the ADT7475 driver:
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(there are 4 fans, numbered fan1 to fan4):
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fanX_input Read the current speed of the fan (in RPMs)
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fanX_min Read/write the minimum speed of the fan. Dropping
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below this sets an alarm.
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(there are three PWMs, numbered pwm1 to pwm3):
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pwmX Read/write the current duty cycle of the PWM. Writes
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only have effect when auto mode is turned off (see
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below). Range is 0 - 255.
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pwmX_enable Fan speed control method:
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0 - No control (fan at full speed)
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1 - Manual fan speed control (using pwm[1-*])
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2 - Automatic fan speed control
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pwmX_auto_channels_temp Select which channels affect this PWM
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1 - TEMP1 controls PWM
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2 - TEMP2 controls PWM
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4 - TEMP3 controls PWM
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6 - TEMP2 and TEMP3 control PWM
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7 - All three inputs control PWM
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pwmX_freq Read/write the PWM frequency in Hz. The number
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should be one of the following:
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11 Hz
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14 Hz
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22 Hz
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29 Hz
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35 Hz
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44 Hz
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58 Hz
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88 Hz
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pwmX_auto_point1_pwm Read/write the minimum PWM duty cycle in automatic mode
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pwmX_auto_point2_pwm Read/write the maximum PWM duty cycle in automatic mode
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(there are three temperature settings numbered temp1 to temp3):
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tempX_input Read the current temperature. The value is in milli
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degrees of Celsius.
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tempX_max Read/write the upper temperature limit - exceeding this
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will cause an alarm.
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tempX_min Read/write the lower temperature limit - exceeding this
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will cause an alarm.
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tempX_offset Read/write the temperature adjustment offset
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tempX_crit Read/write the THERM limit for remote1.
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tempX_crit_hyst Set the temperature value below crit where the
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fans will stay on - this helps drive the temperature
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low enough so it doesn't stay near the edge and
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cause THERM to keep tripping.
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tempX_auto_point1_temp Read/write the minimum temperature where the fans will
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turn on in automatic mode.
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tempX_auto_point2_temp Read/write the maximum temperature over which the fans
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will run in automatic mode. tempX_auto_point1_temp
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and tempX_auto_point2_temp together define the
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range of automatic control.
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tempX_alarm Read a 1 if the max/min alarm is set
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tempX_fault Read a 1 if either temp1 or temp3 diode has a fault
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(There are two voltage settings, in1 and in2):
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inX_input Read the current voltage on VCC. Value is in
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millivolts.
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inX_min read/write the minimum voltage limit.
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Dropping below this causes an alarm.
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inX_max read/write the maximum voltage limit.
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Exceeding this causes an alarm.
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inX_alarm Read a 1 if the max/min alarm is set.
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