drivers/char/rtc.c allowed RTC_PIE_ON ioctls for non-root users, as long as
the current interval (set via RTC_IRQP_SET) is <= max_user_freq. Allow
RTC_PIE_ON under the same conditions when /dev/rtc* is handled by the rtc
subsystem.
Signed-off-by: Bryan Kadzban <bryan@kdzbn.homelinux.net>
Acked-by: Alessandro Zummo <alessandro.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/char/rtc.c exposed a sysctl to change the maximum frequency at
which a non-root user could ask the RTC to generate interrupts (via the
RTC_IRQP_SET ioctl). This value is no longer available under the new RTC
subsystem, so add it to sysfs for each RTC device.
Works for me on x86_64 (both reads and writes), using rtc-cmos.
Signed-off-by: Bryan Kadzban <bryan@kdzbn.homelinux.net>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Some cleanups for the rtc-cmos probe logic:
- Claim i/o ports with request_region() not request_resource(),
for better coexistence betwen platform and pnp bus glues.
- Claim those ports earlier, to help work around procfs bugs
(it allows duplicate names, like /proc/driver/rtc).
- Fix some glitches in cleanup code, notably a cut'n'paste-o
where the i/o port region might not get released during
cleanup after a probe fault.
And some comment clarifications, including noting that this code
must work with PNPBIOS not just PNPACPI..
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix readback of RTC alarms on platforms which return -1 in
non-hardware-supported RTC alarm fields.
To fill in the missing (-1) values, we grab an RTC timestamp along with the
RTC alarm value, and use the timestamp fields to populate the missing alarm
fields.
To counter field-wrap races (since the timestamp and alarm are not read
together atomically), we read the RTC timestamp both before and after
reading the RTC alarm value, and then check for wrapped fields --> if any
have wrapped, we know we have a possible inconsistency, so we loop and
reread the timestamp and alarm again.
Wrapped fields in the RTC timestamps are an issue because rtc-cmos.c, for
example, also gets/uses an RTC timestamp internally while fetching the RTC
alarm. If our timestamp here wasn't the same (minutes and higher) as what
was used internally there, then we might end up populating the -1 fields
with inconsistent values.
This fixes readbacks from /sys/class/rtc/rtc?/wakealarm, as well as other
code paths which call rtc_read_alarm().
Signed-off-by: Mark Lord <mlord@pobox.com>
Cc: David Brownell <david-b@pacbell.net>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This patch adds an RTC class driver for the Maxim/Dallas 1374 RTC chip,
based on drivers/i2c/chips/ds1374.c. It supports alarm functionality.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Not all i2c adapters support I2C-level messaging. Check that the adapter
does before probing for a PCF8583 chip, as the driver makes use of
i2c_transfer and i2c_master_send.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The rtc-ds1742 platform driver name doesn't match its module name,
which might prevents it from properly hotplugging. There is only two
in-tree user of its driver, which are fixed by this patch too.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The rtc-ds1553 platform driver name doesn't match its module name, which
might prevent it from properly hotplugging. This driver has no in-tree
users.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
In rtc-dev.c, when a rtc device is opened, file->private_data is already
attached with the rtc device pointer, so there is no need to call
to_rtc_device() to convert file->private_data to a rtc device pointer.
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Mark Zhan <rongkai.zhan@windriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
RTC periodic IRQs are only defined to work for 2^N Hz values. This patch
moves that validity check into the infrastructure, so drivers don't need to
check it; and adds kerneldoc for the two interface functions related to
periodic IRQs. (One of which was quite mysterious until its first use was
recently checked in!)
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add kernel/kernel and kernel/user locking for the periodic irq feature of
the rtc class.
PIE ioctls are also supported.
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
All SH-4 parts have a 4-digit year, while the SH-3 parts typically
only use a 2-digit one. The SH7705, SH7710, and SH7712 SH-3 parts
however opted to extend it to 4-digit and still look and act like
an SH-3 RTC in all other ways.
This adds a capability flag (RTC_CAP_4_DIGIT_YEAR) that these
corner-case CPU subtypes can set in their platform data and cleans
up some of the ifdef mess in the driver as a result.
Reported-by: Markus Brunner <super.firetwister@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Currently the rtc driver, rtc-ds1552.c uses an unsigned long to store the
base mmio address of the NVRAM/RTC. This breaks on 32-bit systems with
larger physical addresses.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: David Brownell <david-b@pacbell.net>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Currently the rtc driver, rtc-ds1742.c uses an unsigned long to store the
base mmio address of the NVRAM/RTC. This breaks on systems like PowerPC
440, which is a 32-bit core with 36-bit physical addresses: IO on the
system, including the RTC, is typically above the 4GB point, and cannot fit
into an unsigned long.
This patch fixes the problem by replacing the unsigned long with a
resource_size_t. Tested on Ebony (PPC440) (with additional patches to
instantiate the ds1742 platform device appropriately).
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The rtc-rs5c348 SPI driver name doesn't match its module name, which
prevents it from properly hotplugging. There is only one in-tree user
of its driver, which is fixed by this patch too.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Acked-by: David Brownell <david-b@pacbell.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Minor tweaks to rtc-max6902: make it hotplug correctly, and fix a few
space-before-tab whitespace botches. This driver has no current in-tree
users, so the hotplug fix changes the driver name.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The new rtc-m41t80 driver name doesn't match its module name, which
prevents it from properly hotplugging. Since it's new, no platforms yet
depend on that name ... so this patch fixes the driver name to match its
module name, rather than going the other way around with a MODULE_ALIAS().
NOTE: This sort of bug is a new thing to watch out for with new-style I2C
drivers; previously I2C couldn't hotplug.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Since irq in m48t59_private struct is defined as 'unsigned int', which will
make the following if sentence to be never true:
if (m48t59->irq < 0)
m48t59->irq = NO_IRQ;
And thus it will make the m48t59_rtc_probe() is failed when the driver is
working in a no irq mode:
Signed-off-by: Mark Zhan <rongkai.zhan@windriver.com>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Change Kconfig objects from "menu, config" into "menuconfig" so that the
user can disable the whole feature without having to enter the menu first.
Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Cc: David Brownell <david-b@pacbell.net>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The arm26 port has been in a state where it was far from even compiling
for quite some time.
Ian Molton agreed with the removal.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Cc: Ian Molton <spyro@f2s.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Prevent the RTC driver from returning ENOIOCTLCMD to userspace.
Signed-off-by: Thomas Hommel <thomas.hommel@gefanuc.com>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fixup the changes from moving around the arch support for s3c24xx based
systems.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Alphabetic reordering of the drivers in the rtc subsys makefile.
(akpm: merge this asap! Makefiles are the source of many patch conflicts..)
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix a typo turned up by a Coverity check: referring to the wrong register,
which could cause problems with DS1338 RTCs whose oscillators halted.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
struct bin_attribute * is needed in bin_attribute ->read()/->write()
now. Incidentally, could people please run the fscking compiler
before and after applying their patch and compare the build logs?
That (and many, many other) would be caught immediately.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Some SH-3 parts (SH7720 and SH7705 at least) need to have the
start bit explicitly cleared, as the reset is not enough. This
is safe across all parts, so simply clear the start bit in
the sh_rtc_set_time() path.
Signed-off-by: Markus Brunner <super.firetwister@gmail.com>
Signed-off by: Mark Jonas <toertel@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This avoids use of the kernel-internal "xtime" variable directly outside
of the actual time-related functions. Instead, use the helper functions
that we already have available to us.
This doesn't actually change any behaviour, but this will allow us to
fix the fact that "xtime" isn't updated very often with CONFIG_NO_HZ
(because much of the realtime information is maintained as separate
offsets to 'xtime'), which has caused interfaces that use xtime directly
to get a time that is out of sync with the real-time clock by up to a
third of a second or so.
Signed-off-by: John Stultz <johnstul@us.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This patch adds support for the Simtek STK17TA8 timekeeping chip.
The STK17TA8 is quite similar to the DS1553, but differs in register layout
and in various control bits in the registers. I chose to make this a new
driver to avoid confusion in the code and to not get lost in #ifdefs.
Signed-off-by: Thomas Hommel <thomas.hommel@gefanuc.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We now read and write the century byte in the max6900 chip. We probably
don't need to do so on Linux-only system, but it's necessary when the chip
is shared by another OS that uses the century byte.
Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Various people have expressed surprise that their modular RTC drivers don't
seem to work for initializing the system time at boot. To help avoid such
unpleasantness, make the Kconfig text point out that the driver probably
needs to be statically linked.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Both shwdt and rtc-sh are only supported on SH-3 and SH-4 at
the moment, don't allow them to break the SH-2 and SH-5 (sh64)
builds.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Adds support for periodic irq enabling in rtc-cmos. This could be used by
the ALSA driver and is already being tested with the zaptel ztdummy module.
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add Texas Instruments TWL92330/Menelaus Power Management chip driver. This
includes voltage regulators, Dual slot memory card tranceivers and
real-time clock(RTC).
The support for RTC is integrated with this driver only; it is not separate
module. Passes 'rtctest' on OMAP H4 EVM, other than lack of "periodic"
(1/N second) IRQs. System wakeup alarms (from suspend-to-RAM) work too.
The battery keeps the RTC active over power off, so once you set clock
(rdate/ntpdate/etc, then "hwclock -w") then RTC_HCTOSYS at boot time will
behave as expected.
Cc: "Jean Delvare" <khali@linux-fr.org>
Cc: "Tony Lindgren" <tony@atomide.com>
Cc: "David Brownell" <david-b@pacbell.net>
Signed-off-by: Trilok Soni <soni.trilok@gmail.com>
Acked-by: Alessandro Zummo <alessandro.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Convert the rtc-ds1307 driver into a "new style" driver.
Also improve probe() checks: be more correct about switching out of
AM/PM mode, and issue a (debug) diagnostic when failing due to bogus
register values.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Andrew Victor <andrew@sanpeople.com>
Cc: Bill Gatliff <bgat@billgatliff.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Kumar Gala <galak@gate.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
When we find a ds1337 or ds1339 with the oscillator powered off, turn it
on. If the oscillator fault flag was set, clear it and warn that the clock
needs to be set.
David Brownell: Bugfixes; provide corresponding update for ds1338, and the
core of the fix for ds1340. Use a common warning message ("SET TIME!")
whenever the clock needs to be set after oscillator fault (or oscillator
enable, if fault is not a separate status).
Signed-off-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add a watchdog driver interface to rtc-m41t80 driver. This is derived from
works by Alexander Bigga <ab@mycable.de>
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Alexander Bigga <ab@mycable.de>
Cc: David Brownell <david-b@pacbell.net>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This is a new-style i2c driver for ST M41T80 series RTC chip, derived from
works by Alexander Bigga <ab@mycable.de> who wrote the original
rtc-m41txx.c based on drivers/i2c/chips/m41t00.c driver.
This driver supports M41T8[0-4] and M41ST8[457]. The old m41t00 driver
supports M41T00, M41T81 and M41T85(M41ST85). While the M41T00 chip is now
supported by rtc-ds1307 driver, this driver does not include support for
the chip.
[akpm@linux-foundation.org: remove bogus `static']
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Alexander Bigga <ab@mycable.de>
Acked-by: Mark A. Greer <mgreer@mvista.com>
Cc: David Brownell <david-b@pacbell.net>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Minor fix to the Kconfig for RTCs: don't display section headers for I2C or
SPI unless they're configured. And depend on SPI_MASTER; having slave
support wouldn't help.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Tested on the AT32AP7000/ATSTK1000. Driver does only suport time, wake up
and a very simple alarm, because of hardware limitations.
Hardware documentation can be found in the AT32AP7000 data sheet, which can
be downloaded from
http://www.atmel.com/dyn/products/datasheets.asp?family_id=682
From: David Brownell <david-b@pacbell.net>
- Strike some alarm setup code that's no longer needed.
(This patch seems to have gotten lost somewhere...)
- Make the driver name (and its module alias) match what
the platform setup code uses, so the driver can bind
and hotplug.
[akpm@linux-foundation.org: fix several checkpatch.pl warnings]
Signed-off-by: Hans-Christian Egtvedt <hcegtvedt@atmel.com>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Convert rtc-rs5c372 to be a "new style" I2C driver, and update the
Kconfig text to be more complete..
Verified on an OMAP H4 development platform, along with a board
init patch to declare its rv5c387a device.
Only one defconfig -- powerpc/linkstation -- uses this driver; but
several other platforms use it, just without defconfig support.
Such platforms need to be converted so (a) their I2C adapter driver
supports new-style drivers, and (b) board init code declares this
I2C device.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Voipio Riku <Riku.Voipio@movial.fi>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Martin Michlmayr <tbm@cyrius.com>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This updates the rtc-ds1307 driver so that converting it to a "new style"
driver (driver model, not legacy i2c model) will involve fewer changes.
- Use pointer to i2c_client almost everywhere, so that it's easy
to let the i2c core create that object;
- Avoid using i2c_client.adapter, since that field is redundant and
thus may go away (same object as i2c_client.dev.parent).
- Extend type enum to include various RTCs this is expected to
work with, and include register support for them.
It also cleans up the support for multiple chip types, and fixes a
glitch that could appear with an un-initialized RTC.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The x1205 driver moved to the RTC subsystem and was significantly
modified since then, so just delete the outdated documentation.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Alessandro Zummo <alessandro.zummo@towertech.it>
Bryan Kadzban