| Kernel driver w83791d |
| ===================== |
| |
| Supported chips: |
| * Winbond W83791D |
| Prefix: 'w83791d' |
| Addresses scanned: I2C 0x2c - 0x2f |
| Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/W83791Da.pdf |
| |
| Author: Charles Spirakis <bezaur@gmail.com> |
| |
| This driver was derived from the w83781d.c and w83792d.c source files. |
| |
| Credits: |
| w83781d.c: |
| Frodo Looijaard <frodol@dds.nl>, |
| Philip Edelbrock <phil@netroedge.com>, |
| and Mark Studebaker <mdsxyz123@yahoo.com> |
| w83792d.c: |
| Chunhao Huang <DZShen@Winbond.com.tw>, |
| Rudolf Marek <r.marek@sh.cvut.cz> |
| |
| Module Parameters |
| ----------------- |
| |
| * init boolean |
| (default 0) |
| Use 'init=1' to have the driver do extra software initializations. |
| The default behavior is to do the minimum initialization possible |
| and depend on the BIOS to properly setup the chip. If you know you |
| have a w83791d and you're having problems, try init=1 before trying |
| reset=1. |
| |
| * reset boolean |
| (default 0) |
| Use 'reset=1' to reset the chip (via index 0x40, bit 7). The default |
| behavior is no chip reset to preserve BIOS settings. |
| |
| * force_subclients=bus,caddr,saddr,saddr |
| This is used to force the i2c addresses for subclients of |
| a certain chip. Example usage is `force_subclients=0,0x2f,0x4a,0x4b' |
| to force the subclients of chip 0x2f on bus 0 to i2c addresses |
| 0x4a and 0x4b. |
| |
| |
| Description |
| ----------- |
| |
| This driver implements support for the Winbond W83791D chip. |
| |
| Detection of the chip can sometimes be foiled because it can be in an |
| internal state that allows no clean access (Bank with ID register is not |
| currently selected). If you know the address of the chip, use a 'force' |
| parameter; this will put it into a more well-behaved state first. |
| |
| The driver implements three temperature sensors, five fan rotation speed |
| sensors, and ten voltage sensors. |
| |
| Temperatures are measured in degrees Celsius and measurement resolution is 1 |
| degC for temp1 and 0.5 degC for temp2 and temp3. An alarm is triggered when |
| the temperature gets higher than the Overtemperature Shutdown value; it stays |
| on until the temperature falls below the Hysteresis value. |
| |
| Fan rotation speeds are reported in RPM (rotations per minute). An alarm is |
| triggered if the rotation speed has dropped below a programmable limit. Fan |
| readings can be divided by a programmable divider (1, 2, 4, 8 for fan 1/2/3 |
| and 1, 2, 4, 8, 16, 32, 64 or 128 for fan 4/5) to give the readings more |
| range or accuracy. |
| |
| Voltage sensors (also known as IN sensors) report their values in millivolts. |
| An alarm is triggered if the voltage has crossed a programmable minimum |
| or maximum limit. |
| |
| Alarms are provided as output from a "realtime status register". The |
| following bits are defined: |
| |
| bit - alarm on: |
| 0 - Vcore |
| 1 - VINR0 |
| 2 - +3.3VIN |
| 3 - 5VDD |
| 4 - temp1 |
| 5 - temp2 |
| 6 - fan1 |
| 7 - fan2 |
| 8 - +12VIN |
| 9 - -12VIN |
| 10 - -5VIN |
| 11 - fan3 |
| 12 - chassis |
| 13 - temp3 |
| 14 - VINR1 |
| 15 - reserved |
| 16 - tart1 |
| 17 - tart2 |
| 18 - tart3 |
| 19 - VSB |
| 20 - VBAT |
| 21 - fan4 |
| 22 - fan5 |
| 23 - reserved |
| |
| When an alarm goes off, you can be warned by a beeping signal through your |
| computer speaker. It is possible to enable all beeping globally, or only |
| the beeping for some alarms. |
| |
| The driver only reads the chip values each 3 seconds; reading them more |
| often will do no harm, but will return 'old' values. |
| |
| W83791D TODO: |
| --------------- |
| Provide a patch for per-file alarms as discussed on the mailing list |
| Provide a patch for smart-fan control (still need appropriate motherboard/fans) |