The patch titled
RTC class: Kconfig improvements
has been added to the -mm tree. Its filename is
rtc-class-kconfig-improvements.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: RTC class: Kconfig improvements
From: David Brownell <david-b@xxxxxxxxxxx>
Small updates to make the RTC class Kconfig text be more informative. This
should help folk used to the drivers/char/rtc.c support, or a single RTC, be
slightly less surprised by the differences.
Also, adds a new RTC_DEBUG option to predefine DEBUG in the framework and its
drivers, while debugging. That's getting to be a standard idiom, and it's
pretty useful.
Signed-off-by: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
Cc: Alessandro Zummo <a.zummo@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/rtc/Kconfig | 26 +++++++++++++++++++-------
drivers/rtc/Makefile | 4 ++++
2 files changed, 23 insertions(+), 7 deletions(-)
diff -puN drivers/rtc/Kconfig~rtc-class-kconfig-improvements drivers/rtc/Kconfig
--- a/drivers/rtc/Kconfig~rtc-class-kconfig-improvements
+++ a/drivers/rtc/Kconfig
@@ -37,6 +37,13 @@ config RTC_HCTOSYS_DEVICE
The RTC device that will be used as the source for
the system time, usually rtc0.
+config RTC_DEBUG
+ bool "RTC debug support"
+ depends on RTC_CLASS = y
+ help
+ Say yes here to enable debugging support in the RTC framework
+ and individual RTC drivers.
+
comment "RTC interfaces"
depends on RTC_CLASS
@@ -45,8 +52,8 @@ config RTC_INTF_SYSFS
depends on RTC_CLASS && SYSFS
default RTC_CLASS
help
- Say yes here if you want to use your RTC using the sysfs
- interface, /sys/class/rtc/rtcX .
+ Say yes here if you want to use your RTCs using sysfs interfaces,
+ /sys/class/rtc/rtc0 through /sys/.../rtcN.
This driver can also be built as a module. If so, the module
will be called rtc-sysfs.
@@ -56,8 +63,9 @@ config RTC_INTF_PROC
depends on RTC_CLASS && PROC_FS
default RTC_CLASS
help
- Say yes here if you want to use your RTC using the proc
- interface, /proc/driver/rtc .
+ Say yes here if you want to use your first RTC through the proc
+ interface, /proc/driver/rtc. Other RTCs will not be available
+ through that API.
This driver can also be built as a module. If so, the module
will be called rtc-proc.
@@ -67,8 +75,11 @@ config RTC_INTF_DEV
depends on RTC_CLASS
default RTC_CLASS
help
- Say yes here if you want to use your RTC using the dev
- interface, /dev/rtc .
+ Say yes here if you want to use your RTCs using the /dev
+ interfaces, which "udev" sets up as /dev/rtc0 through
+ /dev/rtcN. You may want to set up a symbolic link so one
+ of these can be accessed as /dev/rtc, which is a name
+ expected by "hwclock" and some other programs.
This driver can also be built as a module. If so, the module
will be called rtc-dev.
@@ -78,7 +89,8 @@ config RTC_INTF_DEV_UIE_EMUL
depends on RTC_INTF_DEV
help
Provides an emulation for RTC_UIE if the underlaying rtc chip
- driver did not provide RTC_UIE ioctls.
+ driver does not expose RTC_UIE ioctls. Those requests generate
+ once-per-second update interrupts, used for synchronization.
comment "RTC drivers"
depends on RTC_CLASS
diff -puN drivers/rtc/Makefile~rtc-class-kconfig-improvements drivers/rtc/Makefile
--- a/drivers/rtc/Makefile~rtc-class-kconfig-improvements
+++ a/drivers/rtc/Makefile
@@ -2,6 +2,10 @@
# Makefile for RTC class/drivers.
#
+ifeq ($(CONFIG_RTC_DEBUG),y)
+ EXTRA_CFLAGS += -DDEBUG
+endif
+
obj-$(CONFIG_RTC_LIB) += rtc-lib.o
obj-$(CONFIG_RTC_HCTOSYS) += hctosys.o
obj-$(CONFIG_RTC_CLASS) += rtc-core.o
_
Patches currently in -mm which might be from david-b@xxxxxxxxxxx are
origin.patch
i2c-tps65010-update-for-current-i2c-omap.patch
git-pcmcia.patch
rtc-class-kconfig-improvements.patch
rtc-class-uses-subsys_init.patch
rtc-class-error-checks.patch
constify-rtc_class_ops-update-drivers.patch
at91rm9200-rtc-can-issue-system-wakeup-events.patch
omap_cf-works-again-sync-with-linux-omap-tree.patch
ide-reprogram-disk-pio-timings-on-resume.patch
-
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