diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/hwmon/w83791d | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/Documentation/hwmon/w83791d b/Documentation/hwmon/w83791d index a67d3b7a7098..49c0e94a118c 100644 --- a/Documentation/hwmon/w83791d +++ b/Documentation/hwmon/w83791d | |||
| @@ -58,29 +58,32 @@ internal state that allows no clean access (Bank with ID register is not | |||
| 58 | currently selected). If you know the address of the chip, use a 'force' | 58 | currently selected). If you know the address of the chip, use a 'force' |
| 59 | parameter; this will put it into a more well-behaved state first. | 59 | parameter; this will put it into a more well-behaved state first. |
| 60 | 60 | ||
| 61 | The driver implements three temperature sensors, five fan rotation speed | 61 | The driver implements three temperature sensors, ten voltage sensors, |
| 62 | sensors, and ten voltage sensors. | 62 | five fan rotation speed sensors and manual PWM control of each fan. |
| 63 | 63 | ||
| 64 | Temperatures are measured in degrees Celsius and measurement resolution is 1 | 64 | Temperatures are measured in degrees Celsius and measurement resolution is 1 |
| 65 | degC for temp1 and 0.5 degC for temp2 and temp3. An alarm is triggered when | 65 | degC for temp1 and 0.5 degC for temp2 and temp3. An alarm is triggered when |
| 66 | the temperature gets higher than the Overtemperature Shutdown value; it stays | 66 | the temperature gets higher than the Overtemperature Shutdown value; it stays |
| 67 | on until the temperature falls below the Hysteresis value. | 67 | on until the temperature falls below the Hysteresis value. |
| 68 | 68 | ||
| 69 | Voltage sensors (also known as IN sensors) report their values in millivolts. | ||
| 70 | An alarm is triggered if the voltage has crossed a programmable minimum | ||
| 71 | or maximum limit. | ||
| 72 | |||
| 69 | Fan rotation speeds are reported in RPM (rotations per minute). An alarm is | 73 | Fan rotation speeds are reported in RPM (rotations per minute). An alarm is |
| 70 | triggered if the rotation speed has dropped below a programmable limit. Fan | 74 | triggered if the rotation speed has dropped below a programmable limit. Fan |
| 71 | readings can be divided by a programmable divider (1, 2, 4, 8, 16, | 75 | readings can be divided by a programmable divider (1, 2, 4, 8, 16, |
| 72 | 32, 64 or 128 for all fans) to give the readings more range or accuracy. | 76 | 32, 64 or 128 for all fans) to give the readings more range or accuracy. |
| 73 | 77 | ||
| 74 | Voltage sensors (also known as IN sensors) report their values in millivolts. | 78 | Each fan controlled is controlled by PWM. The PWM duty cycle can be read and |
| 75 | An alarm is triggered if the voltage has crossed a programmable minimum | 79 | set for each fan separately. Valid values range from 0 (stop) to 255 (full). |
| 76 | or maximum limit. | ||
| 77 | 80 | ||
| 78 | The w83791d has a global bit used to enable beeping from the speaker when an | 81 | The w83791d has a global bit used to enable beeping from the speaker when an |
| 79 | alarm is triggered as well as a bitmask to enable or disable the beep for | 82 | alarm is triggered as well as a bitmask to enable or disable the beep for |
| 80 | specific alarms. You need both the global beep enable bit and the | 83 | specific alarms. You need both the global beep enable bit and the |
| 81 | corresponding beep bit to be on for a triggered alarm to sound a beep. | 84 | corresponding beep bit to be on for a triggered alarm to sound a beep. |
| 82 | 85 | ||
| 83 | The sysfs interface to the gloabal enable is via the sysfs beep_enable file. | 86 | The sysfs interface to the global enable is via the sysfs beep_enable file. |
| 84 | This file is used for both legacy and new code. | 87 | This file is used for both legacy and new code. |
| 85 | 88 | ||
| 86 | The sysfs interface to the beep bitmask has migrated from the original legacy | 89 | The sysfs interface to the beep bitmask has migrated from the original legacy |