| Mauro Carvalho Chehab | 9b5db89 | 2019-06-28 18:23:13 -0300 | [diff] [blame] | 1 | ======================== |
| Darrick J. Wong | a412ae3 | 2008-11-12 13:27:04 -0800 | [diff] [blame] | 2 | Kernel driver ics932s401 |
| Mauro Carvalho Chehab | 9b5db89 | 2019-06-28 18:23:13 -0300 | [diff] [blame] | 3 | ======================== |
| Darrick J. Wong | a412ae3 | 2008-11-12 13:27:04 -0800 | [diff] [blame] | 4 | |
| 5 | Supported chips: |
| Mauro Carvalho Chehab | 9b5db89 | 2019-06-28 18:23:13 -0300 | [diff] [blame] | 6 | |
| Darrick J. Wong | a412ae3 | 2008-11-12 13:27:04 -0800 | [diff] [blame] | 7 | * IDT ICS932S401 |
| Mauro Carvalho Chehab | 9b5db89 | 2019-06-28 18:23:13 -0300 | [diff] [blame] | 8 | |
| Darrick J. Wong | a412ae3 | 2008-11-12 13:27:04 -0800 | [diff] [blame] | 9 | Prefix: 'ics932s401' |
| Mauro Carvalho Chehab | 9b5db89 | 2019-06-28 18:23:13 -0300 | [diff] [blame] | 10 | |
| Darrick J. Wong | a412ae3 | 2008-11-12 13:27:04 -0800 | [diff] [blame] | 11 | Addresses scanned: I2C 0x69 |
| Mauro Carvalho Chehab | 9b5db89 | 2019-06-28 18:23:13 -0300 | [diff] [blame] | 12 | |
| Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 13 | Datasheet: Publicly available at the IDT website |
| Darrick J. Wong | a412ae3 | 2008-11-12 13:27:04 -0800 | [diff] [blame] | 14 | |
| 15 | Author: Darrick J. Wong |
| 16 | |
| 17 | Description |
| 18 | ----------- |
| 19 | |
| 20 | This driver implements support for the IDT ICS932S401 chip family. |
| 21 | |
| 22 | This chip has 4 clock outputs--a base clock for the CPU (which is likely |
| 23 | multiplied to get the real CPU clock), a system clock, a PCI clock, a USB |
| 24 | clock, and a reference clock. The driver reports selected and actual |
| 25 | frequency. If spread spectrum mode is enabled, the driver also reports by what |
| 26 | percent the clock signal is being spread, which should be between 0 and -0.5%. |
| 27 | All frequencies are reported in KHz. |
| 28 | |
| 29 | The ICS932S401 monitors all inputs continuously. The driver will not read |
| 30 | the registers more often than once every other second. |
| 31 | |
| 32 | Special Features |
| 33 | ---------------- |
| 34 | |
| 35 | The clocks could be reprogrammed to increase system speed. I will not help you |
| 36 | do this, as you risk damaging your system! |