projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| a412ae3f DW |
1 | Kernel driver ics932s401 |
| 2 | ====================== | |
| 3 | ||
| 4 | Supported chips: | |
| 5 | * IDT ICS932S401 | |
| 6 | Prefix: 'ics932s401' | |
| 7 | Addresses scanned: I2C 0x69 | |
| 25985edc | 8 | Datasheet: Publicly available at the IDT website |
| a412ae3f DW |
9 | |
| 10 | Author: Darrick J. Wong | |
| 11 | ||
| 12 | Description | |
| 13 | ----------- | |
| 14 | ||
| 15 | This driver implements support for the IDT ICS932S401 chip family. | |
| 16 | ||
| 17 | This chip has 4 clock outputs--a base clock for the CPU (which is likely | |
| 18 | multiplied to get the real CPU clock), a system clock, a PCI clock, a USB | |
| 19 | clock, and a reference clock. The driver reports selected and actual | |
| 20 | frequency. If spread spectrum mode is enabled, the driver also reports by what | |
| 21 | percent the clock signal is being spread, which should be between 0 and -0.5%. | |
| 22 | All frequencies are reported in KHz. | |
| 23 | ||
| 24 | The ICS932S401 monitors all inputs continuously. The driver will not read | |
| 25 | the registers more often than once every other second. | |
| 26 | ||
| 27 | Special Features | |
| 28 | ---------------- | |
| 29 | ||
| 30 | The clocks could be reprogrammed to increase system speed. I will not help you | |
| 31 | do this, as you risk damaging your system! |