cs5535: add a generic MFGPT driver
This is based on the old code on arch/x86/kernel/mfgpt_32.c, except it's
not x86 specific, it's modular, and it makes use of a PCI BAR rather than
a random MSR. Currently module unloading is not supported; it's uncertain
whether or not it can be made work with the hardware.
[akpm@linux-foundation.org: add X86 dependency]
Signed-off-by: Andres Salomon <dilinger@collabora.co.uk>
Cc: Jordan Crouse <jordan@cosmicpenguin.net>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Chris Ball <cjb@laptop.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 724d118..d6d6d84 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -187,6 +187,30 @@
this feature will allow for direct communication between SSIs
based on a network adapter and DMA messaging.
+config CS5535_MFGPT
+ tristate "CS5535/CS5536 Geode Multi-Function General Purpose Timer (MFGPT) support"
+ depends on PCI && !MGEODE_LX
+ depends on X86
+ default n
+ help
+ This driver provides access to MFGPT functionality for other
+ drivers that need timers. MFGPTs are available in the CS5535 and
+ CS5536 companion chips that are found in AMD Geode and several
+ other platforms. They have a better resolution and max interval
+ than the generic PIT, and are suitable for use as high-res timers.
+ You probably don't want to enable this manually; other drivers that
+ make use of it should enable it.
+
+config CS5535_MFGPT_DEFAULT_IRQ
+ int
+ default 7
+ help
+ MFGPTs on the CS5535 require an interrupt. The selected IRQ
+ can be overridden as a module option as well as by driver that
+ use the cs5535_mfgpt_ API; however, different architectures might
+ want to use a different IRQ by default. This is here for
+ architectures to set as necessary.
+
config HP_ILO
tristate "Channel interface driver for HP iLO/iLO2 processor"
depends on PCI