diff options
Diffstat (limited to 'Documentation/misc-devices/ics932s401.rst')
| -rw-r--r-- | Documentation/misc-devices/ics932s401.rst | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/Documentation/misc-devices/ics932s401.rst b/Documentation/misc-devices/ics932s401.rst new file mode 100644 index 0000000000..613ee54a9c --- /dev/null +++ b/Documentation/misc-devices/ics932s401.rst @@ -0,0 +1,36 @@ +======================== +Kernel driver ics932s401 +======================== + +Supported chips: + + * IDT ICS932S401 + + Prefix: 'ics932s401' + + Addresses scanned: I2C 0x69 + + Datasheet: Publicly available at the IDT website + +Author: Darrick J. Wong + +Description +----------- + +This driver implements support for the IDT ICS932S401 chip family. + +This chip has 4 clock outputs--a base clock for the CPU (which is likely +multiplied to get the real CPU clock), a system clock, a PCI clock, a USB +clock, and a reference clock. The driver reports selected and actual +frequency. If spread spectrum mode is enabled, the driver also reports by what +percent the clock signal is being spread, which should be between 0 and -0.5%. +All frequencies are reported in KHz. + +The ICS932S401 monitors all inputs continuously. The driver will not read +the registers more often than once every other second. + +Special Features +---------------- + +The clocks could be reprogrammed to increase system speed. I will not help you +do this, as you risk damaging your system! |