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* rtc-cmos alarm acts as oneshotDavid Brownell2008-02-063-7/+35
| | | | | | | | | | | | | | | | | | | | | Start making the rtc-cmos alarm act more like a oneshot alarm by disabling that alarm after its IRQ fires. (ACPI hooks are also needed.) The Linux RTC framework has previously been a bit vague in this area, but any other behavior is problematic and not very portable. RTCs with full YYYY-MM-DD HH:MM[:SS] alarms won't have a problem here. Only ones with partial match criteria, with the most visible example being the PC RTC, get confused. (Because the criteria will match repeatedly.) Update comments relating to that oneshot behavior and timezone handling. (Timezones are another issue that's mostly visible with rtc-cmos. That's because PCs often dual-boot MS-Windows, which likes its RTC to match local wall-clock time instead of UTC.) 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>
* rtc: ds1302 rtc supportPaul Mundt2008-02-063-0/+269
| | | | | | | | | | | | | | | | | This adds a basic ds1302 RTC driver, which is basically a cleanup and move of the in-tree SH SecureEdge5410 code (which is currently located in arch/sh/board/snapgear/rtc.c) to drivers/rtc. This aims to be a building block that the M32R and CRIS code can be worked on top of, so we can get rid of drivers/char/ds1302.c and arch/cris/arch-v10/drivers/ds1302.c respectively, though more work is needed for this. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Paul Mundt <lethal@linux-sh.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>
* rtc-cmos: export nvram in sysfsDavid Brownell2008-02-061-12/+117
| | | | | | | | | | | | | | | | | | | | | | | | | | | This makes rtc-cmos export its NVRAM, like several other RTC drivers. It still works within the limits of the current CMOS_READ/CMOS_WRITE calls, which don't understand how to access multiple register banks. The primary impact of that limitation is that Linux can't access the uppermost 128 bytes of NVRAM on many systems. Note that this isn't aiming to be a drop-in replacement for the legacy /dev/nvram support. (Presumably that has real users, and isn't just getting carried forward automatically?) Userspace handles more work: - When userspace code updates NVRAM, that will need to include updating any platform-specific checksums that may apply. - No /proc/driver/nvram file will parse and display NVRAM data according to whichever boot firmware your board expects. Also minor pnp-related updates: update a comment, remove dead code. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc-s3c: Use is_power_of_2() macro for simplicity.Robert P. J. Day2008-02-061-3/+2
| | | | | | | | | | Use is_power_of_2() macro for simplicity. Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> 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>
* rtc-pcf8583: Don't abuse I2C_M_NOSTARTJean Delvare2008-02-061-17/+7
| | | | | | | | | | | | The rtc-pcf8583 driver is using the I2C_M_NOSTART flag but shouldn't. This flag is only meant for broken chips and the PCF8583 RTC chip is not one of these. Signed-off-by: Jean Delvare <khali@linux-fr.org> 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>
* Cosmetic fixes to RTC subsystem's KconfigAlessandro Zummo2008-02-061-26/+30
| | | | | | | | | | Add adds a warning if a potentially conflicting RTC option has been selected and makes some other cosmetic fixes to the Kconfig. 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>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6Linus Torvalds2008-01-292-12/+14
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (197 commits) sh: add spi header and r2d platform data V3 sh: update r7780rp interrupt code sh: remove consistent alloc stuff from the machine vector sh: use declared coherent memory for dreamcast pci ethernet adapter sh: declared coherent memory support V2 sh: Add support for SDK7780 board. sh: constify function pointer tables sh: Kill off -traditional for linker script. cdrom: Add support for Sega Dreamcast GD-ROM. sh: Kill off hs7751rvoip reference from arch/sh/Kconfig. sh: Drop r7780rp_defconfig, use r7780mp_defconfig as kbuild default. sh: Kill off dead HS771RVoIP board support. sh: r7785rp: Fix up DECLARE_INTC_DESC() arg mismatch. sh: r7785rp: Hook up the rest of the HL7785 FPGA IRQ vectors. sh: r2d - enable sm501 usb host function sh: remove voyagergx sh: r2d - add lcd planel timings to sm501 platform data sh: Add OHCI and UDC platform devices for SH7720. sh: intc - remove default interrupt priority tables sh: Correct pte size mismatch for X2 TLB. ...
| * rtc: rtc-sh: Split out the CPU defs to asm/cpu/.Paul Mundt2008-01-281-19/+1
| | | | | | | | | | | | | | | | | | | | | | With all of the different CPU types this was getting a but unwieldly. Since sh64 is now integrated, we don't have to worry about multiple architectures caring about the header definitions. Split out the defs for each asm/cpu/ to make rtc-sh slightly less visually offensive. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * rtc: rtc-sh: SH-2A support.Paul Mundt2008-01-282-3/+19
| | | | | | | | | | | | Trivial support for the SH-2A on-chip RTC. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * rtc: rtc-sh: SH-5 support.Paul Mundt2008-01-282-2/+6
| | | | | | | | | | | | Trivial support for the SH-5 (sh64) on-chip RTC. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* | Merge branch 'pxa-plat' into develRussell King2008-01-281-0/+31
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * pxa-plat: (53 commits) [ARM] 4762/1: Basic support for Toradex Colibri module [ARM] pxa: fix mci_init functions returning -1 [ARM] 4737/1: Refactor corgi_lcd to improve readability + bugfix [ARM] 4747/1: pcm027: support for pcm990 baseboard for phyCORE-PXA270 [ARM] 4746/1: pcm027: network support for phyCORE-PXA270 [ARM] 4745/1: pcm027: default configuration [ARM] 4744/1: pcm027: add support for phyCORE-PXA270 CPU module [NET] smc91x: Make smc91x use IRQ resource trigger flags [ARM] pxa: add default config for littleton [ARM] pxa: add basic support for Littleton (PXA3xx Form Factor Platform) [ARM] 4664/1: Add basic support for HTC Magician PDA phones [ARM] 4649/1: Base support for pxa-based Toshiba e-series PDAs. [ARM] pxa: skip registers saving/restoring if entering standby mode [ARM] pxa: fix PXA27x resume [ARM] pxa: Avoid fiddling with CKEN register on suspend [ARM] pxa: Add PXA3 standby code hooked into the IRQ wake scheme [ARM] pxa: Add zylonite MFP wakeup configurations [ARM] pxa: program MFPs for low power mode when suspending [ARM] pxa: make MFP configuration processor independent [ARM] pxa: remove un-used pxa3xx_mfp_set_xxx() functions ... Conflicts: arch/arm/mach-pxa/ssp.c Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] pxa/sa1100: replace wakeup supportRussell King2008-01-261-0/+31
| | | | | | | | | | | | | | | | | | Replace wakeup support using the alarm via the SA1100 RTC driver on SA1100 and PXA platforms. This allows RTC alarm wakeup to be enabled via sysfs using the conventional attributes. Acked-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | i2c: normal_i2c can be made const (rtc drivers)Jean Delvare2008-01-276-6/+6
|/ | | | | Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Alessandro Zummo <alessandro.zummo@towertech.it>
* rtc: use class iteration apiDave Young2008-01-241-10/+12
| | | | | | | | | | Convert to use the class iteration api. Signed-off-by: Dave Young <hidave.darkstar@gmail.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* rtc-at32ap700x: fix irq init oopsDavid Brownell2007-12-171-10/+10
| | | | | | | | | | | | Reorder at32_rtc_probe() so that it's safe (no oopsing) to fire the IRQ handler the instant that it's registered. (Bug noted via "Debug shared IRQ handlers" kernel debug option.) Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: <hcegtvedt@atmel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* spi: use simplified spi_sync() calling conventionMarc Pignat2007-12-051-9/+3
| | | | | | | | | | | Given the patch which simplifies the spi_sync calling convention, this one updates the callers of that routine which tried using it according to the previous specification. (Most didn't.) Signed-off-by: Marc Pignat <marc.pignat@hevs.ch> 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>
* RTC: assure proper memory ordering with respect to RTC_DEV_BUSY flagJiri Kosina2007-12-052-5/+5
| | | | | | | | | | | | | | | We must make sure that the RTC_DEV_BUSY flag has proper lock semantics, i.e. that the RTC_DEV_BUSY stores clearing the flag don't get reordered before the preceeding stores and loads and vice versa. Spotted by Nick Piggin. Signed-off-by: Jiri Kosina <jkosina@suse.cz> Cc: Nick Piggin <nickpiggin@yahoo.com.au> 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>
* RTC: convert mutex to bitfieldJiri Kosina2007-11-292-10/+6
| | | | | | | | | | | | | | RTC code is using mutex to assure exclusive access to /dev/rtc. This is however wrong usage, as it leaves the mutex locked when returning into userspace, which is unacceptable. Convert rtc->char_lock into bit operation. Signed-off-by: Jiri Kosina <jkosina@suse.cz> 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>
* Blackfin arch: punt CONFIG_BFIN -- we already have CONFIG_BLACKFINMike Frysinger2007-11-231-1/+1
| | | | | | Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* rtc-ds1307 exports NVRAMDavid Brownell2007-11-142-2/+95
| | | | | | | | | | Export the NVRAM on DS1307 and DS1338 chips, like several of the other drivers do for such combination RTC-and-NVRAM chips. 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>
* RTCs: handle NVRAM betterDavid Brownell2007-11-144-4/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Several of the RTC drivers are exporting binary "nvram" files in sysfs. Such NVRAM (or on many systems, EEPROM) data is often initialized during system manufacture to hold data about identity (serial numbers, Ethernet addresses, etc), configuration, calibration, and so forth. This patch improves integrity and security of those files: - Correctly initializes the size in one of the two cases where that was not yet being done. - Improves system security/integrity by making this state not be world-writable by default. Letting arbitrary userspace code mangle such state by default is at least Not A Good Thing; and it could sometimes be worse, depending on the particular data that might be corrupted. (I disregard the paranoiac "don't let anyone read it either" approach. Anyone storing passwords in such memory doesn't really care about security.) Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Cc: Torsten Ertbjerg Rasmussen <tr@newtec.dk> Cc: Mark Zhan <rongkai.zhan@windriver.com> Cc: Thomas Hommel <thomas.hommel@gefanuc.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>
* rtc_hctosys expects RTCs in UTC (doc)David Brownell2007-11-142-3/+5
| | | | | | | | | | | | | | The RTC "hctosys" mechanism expects that RTC clock will use UTC, not local time (e.g. PST). Say so in Kconfig and in the kernel message. (Strictly speaking, the RTC clock should be tracking the POSIX epoch. That's not worth going into here. Goofing timezones means clocks are wrong by many hours; the POSIX-v-UTC differences just cost seconds.) 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>
* rtc: rtc-sh: Zero out tm value for invalid rtc states.Paul Mundt2007-11-071-1/+3
| | | | | | | Follows the changes of some of the other RTC drivers. If the tm value is bogus, just zero it out. Adds some sanity for RTC_RD_TIME. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* rtc: sh-rtc: Handle rtc_device_register() failure properly.Paul Mundt2007-11-071-1/+1
| | | | | | | | | Currently if rtc_device_register() fails we have an IS_ERR() on the wrong pointer, which causes this to always be skipped. Fix this up to actually check the right pointer. The return value was always correct, even though the check was wrong. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* rtc: m48t59 fix section mismatch warningRandy Dunlap2007-11-051-3/+3
| | | | | | | | | | | | | Change the name of this data to use a name (suffix) that is whitelisted by MODPOST so that the section warning is fixed (not generated). WARNING: vmlinux.o(.data+0x1b140): Section mismatch: reference to .init.text:m48t59_rtc_probe (between 'm48t59_rtc_platdrv' and 'm48t59_nvram_attr') Signed-off-by: Randy Dunlap <randy.dunlap@oracle.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>
* rtc: ignore msb when reading back mday from alarmMark Lord2007-11-041-1/+2
| | | | | | | | | | | | | | | | | | | | I have a system here that actively relies upon RTC wake alarms, and it has been failing (again) for a few days when attempting to use the /sys/class/rtc/rtc?/wakealarm interface. The old (fixed by Linus) /proc/ interface still works, but I'd like to get it using the new one. This patch fixes rtc-cmos to ignore the two upper bits when reading the BCD mday (day of month) register from CMOS. Some systems (eg. mine) seem to have the top bit set to "1" for some reason. The older /proc/ interface ignores the upper bits, and so we should too. Signed-off-by: Mark Lord <mlord@pobox.com> Acked-by: David Brownell <david-b@pacbell.net> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* s3c-rtc: remove unused variableKrzysztof Helt2007-10-301-2/+0
| | | | | | | Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Acked-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* typo fixesMatt LaPlante2007-10-201-1/+1
| | | | | | | | | | | | Most of these fixes were already submitted for old kernel versions, and were approved, but for some reason they never made it into the releases. Because this is a consolidation of a couple old missed patches, it touches both Kconfigs and documentation texts. Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
* remove asm/bitops.h includesJiri Slaby2007-10-192-2/+2
| | | | | | | | | | | | | remove asm/bitops.h includes including asm/bitops directly may cause compile errors. don't include it and include linux/bitops instead. next patch will deny including asm header directly. Cc: Adrian Bunk <bunk@kernel.org> Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Add missing newlines to some uses of dev_<level> messagesJoe Perches2007-10-181-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Found these while looking at printk uses. Add missing newlines to dev_<level> uses Add missing KERN_<level> prefixes to multiline dev_<level>s Fixed a wierd->weird spelling typo Added a newline to a printk Signed-off-by: Joe Perches <joe@perches.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Mark M. Hoffman <mhoffman@lightlink.com> Cc: Roland Dreier <rolandd@cisco.com> Cc: Tilman Schmidt <tilman@imap.cc> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Jeff Garzik <jeff@garzik.org> Cc: Stephen Hemminger <shemminger@linux-foundation.org> Cc: Greg KH <greg@kroah.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Cc: James Smart <James.Smart@Emulex.Com> Cc: Andrew Vasquez <andrew.vasquez@qlogic.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Jaroslav Kysela <perex@suse.cz> Cc: Takashi Iwai <tiwai@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: allow validated RTC_PIE_ON for non-rootBryan Kadzban2007-10-161-1/+2
| | | | | | | | | | | | | 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>
* rtc: add max_user_freq to sysfsBryan Kadzban2007-10-161-0/+24
| | | | | | | | | | | | | | | 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>
* rtc-cmos probe() cleanupDavid Brownell2007-10-161-25/+31
| | | | | | | | | | | | | | | | | | | | | | | | 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>
* rtc: fix readback from /sys/class/rtc/rtc?/wakealarmMark Lord2007-10-161-1/+82
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* rtc: RTC class driver for the ds1374Scott Wood2007-10-163-0/+461
| | | | | | | | | | | 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>
* rtc-pcf8583: Check for i2c adapter functionalityJean Delvare2007-10-161-0/+3
| | | | | | | | | | | 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>
* rtc: make rtc-ds1742 driver hotplug-awareAtsushi Nemoto2007-10-161-1/+1
| | | | | | | | | | | | | 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>
* rtc: make rtc-ds1553 driver hotplug-awareAtsushi Nemoto2007-10-161-1/+1
| | | | | | | | | | | | 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>
* rtc-dev: no need to convert file->private_data to rtc deviceMark Zhan2007-10-161-4/+4
| | | | | | | | | | | 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_irq_set_freq() requires power-of-two and associated kerneldocDavid Brownell2007-10-162-5/+27
| | | | | | | | | | | | | 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>
* RTC: periodic irq fixAlessandro Zummo2007-10-163-25/+24
| | | | | | | | | | | | 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>
* rtc: rtc-sh: Support 4-digit year on SH7705/SH7710/SH7712.Paul Mundt2007-09-211-18/+33
| | | | | | | | | | | | | | 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>
* rtc: rtc-ds1553.c should use resource_size_t for base addressAtsushi Nemoto2007-09-191-1/+1
| | | | | | | | | | | | 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>
* rtc-ds1742.c should use resource_size_t for base addressDavid Gibson2007-09-191-1/+1
| | | | | | | | | | | | | | | | | | | 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>
* RTC v3020 fixesMike Rapoport2007-09-111-2/+7
| | | | | | | | | | | | Fix off-by-one in month calculations Add delay for bus accesses to satisfy Tw > 500ns Signed-off-by: Mike Rapoport <mike@compulab.co.il> Acked-by: Raphael Assenat <raph@8d.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>
* [PATCH] rtc: Make rtc-rs5c348 driver hotplug-awareAtsushi Nemoto2007-08-271-1/+1
| | | | | | | | | | 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>
* rtc-max6902 minor fixesDavid Brownell2007-08-221-3/+3
| | | | | | | | | | | 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>
* correct name for rtc-m41t80David Brownell2007-08-221-1/+1
| | | | | | | | | | | | | | | 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>
* rtc-m48t59 driver NO_IRQ mode fixupMark Zhan2007-07-311-1/+1
| | | | | | | | | | | | | | | | 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>
* Use menuconfig objects: RTCJan Engelhardt2007-07-311-47/+31
| | | | | | | | | | | 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>
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