linux/drivers/rtc
David Brownell 7be2c7c96a [PATCH] RTC framework driver for CMOS RTCs
This is an "RTC framework" driver for the "CMOS" RTCs which are standard on
PCs and some other platforms.  That's MC146818 compatible silicon.
Advantages of this vs.  drivers/char/rtc.c (use one _or_ the other, only
one will be able to claim the RTC irq) include:

 - This leverages both the new RTC framework and the driver model; both
   PNPACPI and platform device modes are supported.  (A separate patch
   creates a platform device on PCs where PNPACPI isn't configured.)

 - It supports common extensions like longer alarms.  (A separate patch
   exports that information from ACPI through platform_data.)

 - Likewise, system wakeup events use "real driver model support", with
   policy control via sysfs "wakeup" attributes and and using normal rtc
   ioctls to manage wakeup.  (Patch in the works.  The ACPI hooks are
   known; /proc/acpi/alarm can vanish.  Making it work with EFI will
   be a minor challenge to someone with e.g. a MiniMac.)

It's not yet been tested on non-x86 systems, without ACPI, or with HPET.
And the RTC framework will surely have teething pains on "mainstream"
PC-based systems (though must embedded Linux systems use it heavily), not
limited to sorting out the "/dev/rtc0" issue (udev easily tweaked).  Also,
the ALSA rtctimer code doesn't use the new RTC API.

Otherwise, this should be a no-known-regressions replacement for the old
drivers/char/rtc.c driver, and should help the non-embedded distros (and
the new timekeeping code) start to switch to the framework.

Note also that any systems using "rtc-m48t86" are candidates to switch over
to this more functional driver; the platform data is different, and the way
bytes are read is different, but otherwise those chips should be compatible.

[akpm@osdl.org: sparc32 fix]
[akpm@osdl.org: sparc64 fix]
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Woody Suwalski <woodys@xandros.com>
Cc: Alessandro Zummo <alessandro.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-11 10:51:32 -08:00
..
class.c [PATCH] constify rtc_class_ops: update drivers 2006-10-01 00:39:25 -07:00
hctosys.c [PATCH] RTC subsystem: class 2006-03-27 08:44:51 -08:00
interface.c [PATCH] rtc class locking bugfixes 2006-11-25 13:28:33 -08:00
Kconfig [PATCH] RTC framework driver for CMOS RTCs 2007-02-11 10:51:32 -08:00
Makefile [PATCH] RTC framework driver for CMOS RTCs 2007-02-11 10:51:32 -08:00
rtc-at91rm9200.c [PATCH] rtc-at91rm9200 build fix 2007-01-05 23:55:22 -08:00
rtc-cmos.c [PATCH] RTC framework driver for CMOS RTCs 2007-02-11 10:51:32 -08:00
rtc-dev.c [PATCH] trivial __user annotations - rtc-dev 2007-02-09 09:14:06 -08:00
rtc-ds1307.c [PATCH] RTC: build fixes 2006-10-04 08:15:14 -07:00
rtc-ds1553.c [PATCH] rtc class locking bugfixes 2006-11-25 13:28:33 -08:00
rtc-ds1672.c [PATCH] RTCs don't use i2c_adapter.dev 2006-12-10 09:55:40 -08:00
rtc-ds1742.c [PATCH] rtc: ds1743 support 2006-12-07 08:39:43 -08:00
rtc-ep93xx.c [PATCH] constify rtc_class_ops: update drivers 2006-10-01 00:39:25 -07:00
rtc-isl1208.c [PATCH] constify rtc_class_ops: update drivers 2006-10-01 00:39:25 -07:00
rtc-lib.c [PATCH] rtc: Add rtc_merge_alarm() 2006-12-10 09:55:40 -08:00
rtc-m48t86.c [PATCH] constify rtc_class_ops: update drivers 2006-10-01 00:39:25 -07:00
rtc-max6902.c [PATCH] rtc-max6902: month conversion fix 2006-10-17 08:18:44 -07:00
rtc-omap.c [PATCH] rtc framewok: rtc_wkalrm.enabled reporting updates 2006-12-13 09:05:52 -08:00
rtc-pcf8563.c [PATCH] rtc-pcf8563: detect polarity of century bit automatically 2007-02-09 09:25:46 -08:00
rtc-pcf8583.c [PATCH] constify rtc_class_ops: update drivers 2006-10-01 00:39:25 -07:00
rtc-pl031.c IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
rtc-proc.c [PATCH] rtc framewok: rtc_wkalrm.enabled reporting updates 2006-12-13 09:05:52 -08:00
rtc-rs5c348.c [PATCH] constify rtc_class_ops: update drivers 2006-10-01 00:39:25 -07:00
rtc-rs5c372.c [PATCH] Update the rtc-rs5c372 driver 2007-01-05 23:55:23 -08:00
rtc-s3c.c [PATCH] rtc framewok: rtc_wkalrm.enabled reporting updates 2006-12-13 09:05:52 -08:00
rtc-sa1100.c [PATCH] rtc framewok: rtc_wkalrm.enabled reporting updates 2006-12-13 09:05:52 -08:00
rtc-sh.c [PATCH] rtc-sh: act on rtc_wkalrm.enabled when setting an alarm 2007-01-23 07:52:06 -08:00
rtc-sysfs.c [PATCH] remove __devinit markings from rtc_sysfs_add_device() 2007-01-26 13:51:00 -08:00
rtc-test.c [PATCH] RTC: handle sysfs errors 2006-12-07 08:39:31 -08:00
rtc-v3020.c [PATCH] rtc: fix printk of 64-bit res on 32-bit platform 2006-10-17 08:18:47 -07:00
rtc-vr41xx.c IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
rtc-x1205.c [PATCH] RTCs don't use i2c_adapter.dev 2006-12-10 09:55:40 -08:00