| Jordan Crouse | 1c301fc | 2009-01-15 22:27:47 +0100 | [diff] [blame] | 1 | This describes the interface for the ADT7475 driver: |
| 2 | |
| 3 | (there are 4 fans, numbered fan1 to fan4): |
| 4 | |
| 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. |
| 8 | |
| 9 | (there are three PWMs, numbered pwm1 to pwm3): |
| 10 | |
| 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. |
| 14 | |
| 15 | pwmX_enable Fan speed control method: |
| 16 | |
| 17 | 0 - No control (fan at full speed) |
| 18 | 1 - Manual fan speed control (using pwm[1-*]) |
| 19 | 2 - Automatic fan speed control |
| 20 | |
| 21 | pwmX_auto_channels_temp Select which channels affect this PWM |
| 22 | |
| 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 |
| 28 | |
| 29 | pwmX_freq Read/write the PWM frequency in Hz. The number |
| 30 | should be one of the following: |
| 31 | |
| 32 | 11 Hz |
| 33 | 14 Hz |
| 34 | 22 Hz |
| 35 | 29 Hz |
| 36 | 35 Hz |
| 37 | 44 Hz |
| 38 | 58 Hz |
| 39 | 88 Hz |
| 40 | |
| 41 | pwmX_auto_point1_pwm Read/write the minimum PWM duty cycle in automatic mode |
| 42 | |
| 43 | pwmX_auto_point2_pwm Read/write the maximum PWM duty cycle in automatic mode |
| 44 | |
| 45 | (there are three temperature settings numbered temp1 to temp3): |
| 46 | |
| 47 | tempX_input Read the current temperature. The value is in milli |
| 48 | degrees of Celsius. |
| 49 | |
| 50 | tempX_max Read/write the upper temperature limit - exceeding this |
| 51 | will cause an alarm. |
| 52 | |
| 53 | tempX_min Read/write the lower temperature limit - exceeding this |
| 54 | will cause an alarm. |
| 55 | |
| 56 | tempX_offset Read/write the temperature adjustment offset |
| 57 | |
| 58 | tempX_crit Read/write the THERM limit for remote1. |
| 59 | |
| 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. |
| 64 | |
| 65 | tempX_auto_point1_temp Read/write the minimum temperature where the fans will |
| 66 | turn on in automatic mode. |
| 67 | |
| 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. |
| 72 | |
| 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 |
| 75 | |
| 76 | (There are two voltage settings, in1 and in2): |
| 77 | |
| 78 | inX_input Read the current voltage on VCC. Value is in |
| 79 | millivolts. |
| 80 | |
| 81 | inX_min read/write the minimum voltage limit. |
| 82 | Dropping below this causes an alarm. |
| 83 | |
| 84 | inX_max read/write the maximum voltage limit. |
| 85 | Exceeding this causes an alarm. |
| 86 | |
| 87 | inX_alarm Read a 1 if the max/min alarm is set. |