[PATCH] RTC subsystem: class

Add the basic RTC subsystem infrastructure to the kernel.

rtc/class.c - registration facilities for RTC drivers
rtc/interface.c - kernel/rtc interface functions
rtc/hctosys.c - snippet of code that copies hw clock to sw clock
		at bootup, if configured to do so.

Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 42 insertions, 2 deletions

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 15df7c130fa6..a256f67b78e4 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -1,6 +1,46 @@
-#
+\#
 # RTC class/drivers configuration
 #
 
+menu "Real Time Clock"
+
 config RTC_LIB
-        tristate
\ No newline at end of file
+        tristate
+
+config RTC_CLASS
+        tristate "RTC class"
+        depends on EXPERIMENTAL
+        default n
+        select RTC_LIB
+        help
+          Generic RTC class support. If you say yes here, you will
+          be allowed to plug one or more RTCs to your system. You will
+          probably want to enable one of more of the interfaces below.
+
+          This driver can also be built as a module. If so, the module
+          will be called rtc-class.
+
+config RTC_HCTOSYS
+        bool "Set system time from RTC on startup"
+        depends on RTC_CLASS = y
+        default y
+        help
+          If you say yes here, the system time will be set using
+          the value read from the specified RTC device. This is useful
+          in order to avoid unnecessary fschk runs.
+
+config RTC_HCTOSYS_DEVICE
+        string "The RTC to read the time from"
+        depends on RTC_HCTOSYS = y
+        default "rtc0"
+        help
+          The RTC device that will be used as the source for
+          the system time, usually rtc0.
+
+comment "RTC interfaces"
+        depends on RTC_CLASS
+
+comment "RTC drivers"
+        depends on RTC_CLASS
+
+endmenu