| Kernel driver sch5627 |
| ===================== |
| |
| Supported chips: |
| |
| * SMSC SCH5627 |
| |
| Prefix: 'sch5627' |
| |
| Addresses scanned: none, address read from Super I/O config space |
| |
| Datasheet: Application Note available upon request |
| |
| Author: Hans de Goede <hdegoede@redhat.com> |
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| |
| Description |
| ----------- |
| |
| SMSC SCH5627 Super I/O chips include complete hardware monitoring |
| capabilities. They can monitor up to 5 voltages, 4 fans and 8 temperatures. |
| |
| In addition, the SCH5627 exports data describing which temperature sensors |
| affect the speed of each fan. Setting pwmX_auto_channels_temp to 0 forces |
| the corresponding fan to full speed until another value is written. |
| |
| The SMSC SCH5627 hardware monitoring part also contains an integrated |
| watchdog. In order for this watchdog to function some motherboard specific |
| initialization most be done by the BIOS, so if the watchdog is not enabled |
| by the BIOS the sch5627 driver will not register a watchdog device. |
| |
| The hardware monitoring part of the SMSC SCH5627 is accessed by talking |
| through an embedded microcontroller. An application note describing the |
| protocol for communicating with the microcontroller is available upon |
| request. Please mail me if you want a copy. |
| |
| |
| Controlling fan speed |
| --------------------- |
| |
| The SCH5627 allows for partially controlling the fan speed. If a temperature |
| channel excedes tempX_max, all fans are forced to maximum speed. The same is not |
| true for tempX_crit, presumably some other measures to cool down the system are |
| take in this case. |
| In which way the value of fanX_min affects the fan speed is currently unknown. |
