Commit a412ae3f authored by Darrick J. Wong's avatar Darrick J. Wong Committed by Linus Torvalds

ics932s401: new clock generator chip driver

The ics932s401 is a clock generator chip.  This driver allows users to
read the current clock outputs.
Signed-off-by: default avatarDarrick J. Wong <djwong@us.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent c0b4e3ab
Kernel driver ics932s401
======================
Supported chips:
* IDT ICS932S401
Prefix: 'ics932s401'
Addresses scanned: I2C 0x69
Datasheet: Publically 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!
...@@ -227,6 +227,16 @@ config HP_WMI ...@@ -227,6 +227,16 @@ config HP_WMI
To compile this driver as a module, choose M here: the module will To compile this driver as a module, choose M here: the module will
be called hp-wmi. be called hp-wmi.
config ICS932S401
tristate "Integrated Circuits ICS932S401"
depends on I2C && EXPERIMENTAL
help
If you say yes here you get support for the Integrated Circuits
ICS932S401 clock control chips.
This driver can also be built as a module. If so, the module
will be called ics932s401.
config MSI_LAPTOP config MSI_LAPTOP
tristate "MSI Laptop Extras" tristate "MSI Laptop Extras"
depends on X86 depends on X86
......
...@@ -14,6 +14,7 @@ obj-$(CONFIG_ATMEL_PWM) += atmel_pwm.o ...@@ -14,6 +14,7 @@ obj-$(CONFIG_ATMEL_PWM) += atmel_pwm.o
obj-$(CONFIG_ATMEL_SSC) += atmel-ssc.o obj-$(CONFIG_ATMEL_SSC) += atmel-ssc.o
obj-$(CONFIG_ATMEL_TCLIB) += atmel_tclib.o obj-$(CONFIG_ATMEL_TCLIB) += atmel_tclib.o
obj-$(CONFIG_HP_WMI) += hp-wmi.o obj-$(CONFIG_HP_WMI) += hp-wmi.o
obj-$(CONFIG_ICS932S401) += ics932s401.o
obj-$(CONFIG_TC1100_WMI) += tc1100-wmi.o obj-$(CONFIG_TC1100_WMI) += tc1100-wmi.o
obj-$(CONFIG_LKDTM) += lkdtm.o obj-$(CONFIG_LKDTM) += lkdtm.o
obj-$(CONFIG_TIFM_CORE) += tifm_core.o obj-$(CONFIG_TIFM_CORE) += tifm_core.o
......
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