1 This describes the interface for the ADT7475 driver:
3 (there are 4 fans, numbered fan1 to fan4):
5 fanX_input Read the current speed of the fan (in RPMs)
6 fanX_min Read/write the minimum speed of the fan. Dropping
7 below this sets an alarm.
9 (there are three PWMs, numbered pwm1 to pwm3):
11 pwmX Read/write the current duty cycle of the PWM. Writes
12 only have effect when auto mode is turned off (see
13 below). Range is 0 - 255.
15 pwmX_enable Fan speed control method:
17 0 - No control (fan at full speed)
18 1 - Manual fan speed control (using pwm[1-*])
19 2 - Automatic fan speed control
21 pwmX_auto_channels_temp Select which channels affect this PWM
23 1 - TEMP1 controls PWM
24 2 - TEMP2 controls PWM
25 4 - TEMP3 controls PWM
26 6 - TEMP2 and TEMP3 control PWM
27 7 - All three inputs control PWM
29 pwmX_freq Read/write the PWM frequency in Hz. The number
30 should be one of the following:
41 pwmX_auto_point1_pwm Read/write the minimum PWM duty cycle in automatic mode
43 pwmX_auto_point2_pwm Read/write the maximum PWM duty cycle in automatic mode
45 (there are three temperature settings numbered temp1 to temp3):
47 tempX_input Read the current temperature. The value is in milli
50 tempX_max Read/write the upper temperature limit - exceeding this
53 tempX_min Read/write the lower temperature limit - exceeding this
56 tempX_offset Read/write the temperature adjustment offset
58 tempX_crit Read/write the THERM limit for remote1.
60 tempX_crit_hyst Set the temperature value below crit where the
61 fans will stay on - this helps drive the temperature
62 low enough so it doesn't stay near the edge and
63 cause THERM to keep tripping.
65 tempX_auto_point1_temp Read/write the minimum temperature where the fans will
66 turn on in automatic mode.
68 tempX_auto_point2_temp Read/write the maximum temperature over which the fans
69 will run in automatic mode. tempX_auto_point1_temp
70 and tempX_auto_point2_temp together define the
71 range of automatic control.
73 tempX_alarm Read a 1 if the max/min alarm is set
74 tempX_fault Read a 1 if either temp1 or temp3 diode has a fault
76 (There are two voltage settings, in1 and in2):
78 inX_input Read the current voltage on VCC. Value is in
81 inX_min read/write the minimum voltage limit.
82 Dropping below this causes an alarm.
84 inX_max read/write the maximum voltage limit.
85 Exceeding this causes an alarm.
87 inX_alarm Read a 1 if the max/min alarm is set.