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Mark Brown 35c86bf66d rtc: Add support for RTCs on Wolfson WM831x devices 
The WM831x series of PMICs contain RTC functionality. The hardware
provides a 32 bit counter incrementing at 1Hz together with a per
tick interrupt and an alarm value. For simplicity the driver chooses
to define the epoch for the counter as the Unix epoch - if required
platform data can be used in future to customise this.

When powered on from a completely cold state the RTC reports that it
has not been configured - when this happens an error is returned
when attempting to read the RTC in order to avoid use of values we
know to be invalid.

The hardware also provides security features which mean that it can
ignore attempts to set the RTC time in certain circumstances, most
notably if the RTC is written to too often. These errors are detected
by verifying the written RTC value.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
 		2009-09-17 09:47:13 +02:00
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accessibility
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acpi Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 2009-09-16 07:49:54 -07:00
amba Merge branches 'arm', 'at91', 'bcmring', 'ep93xx', 'mach-types', 'misc' and 'w90x900' into devel 2009-09-12 12:01:34 +01:00
ata pata_rz1000: use printk_once 2009-09-11 02:33:59 -04:00
atm drivers/atm: Use DIV_ROUND_CLOSEST 2009-08-02 12:54:22 -07:00
auxdisplay
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base Driver Core: devtmpfs - kernel-maintained tmpfs-based /dev 2009-09-15 09:50:49 -07:00
block Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2009-09-16 08:27:10 -07:00
bluetooth pcmcia: dtl1_cs: fix pcmcia_loop_config logic 2009-09-15 10:17:16 -07:00
cdrom
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char Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2009-09-16 08:27:10 -07:00
clocksource sh: CMT suspend/resume 2009-08-15 12:58:45 +09:00
connector Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-07-23 19:03:51 -07:00
cpufreq Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2009-09-15 09:39:44 -07:00
cpuidle
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crypto crypto: talitos - add support for 36 bit addressing 2009-08-13 11:51:51 +10:00
dca
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dio
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dma at_hdmac: Rework suspend_late()/resume_early() 2009-09-14 20:27:00 +02:00
edac EDAC, AMD: decode FR MCEs 2009-09-14 19:01:37 +02:00
eisa
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firewire driver model: constify attribute groups 2009-09-15 09:50:47 -07:00
firmware driver model: constify attribute groups 2009-09-15 09:50:47 -07:00
gpio gpio: Add WM831X GPIO driver 2009-09-17 09:47:01 +02:00
gpu PCI/vgaarb: cleanup some warnings + cleanup some comments. 2009-09-09 13:29:41 -07:00
hid Merge branches 'upstream', 'upstream-fixes' and 'debugfs' into for-linus 2009-09-13 20:09:41 +02:00
hwmon hwmon: WM831x PMIC hardware monitoring driver 2009-09-17 09:47:02 +02:00
i2c Merge branch 'master' into for-linus 2009-08-23 00:03:00 +02:00
ide Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide-next-2.6 2009-09-15 10:01:16 -07:00
idle
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ieee1394 drivers: Kill now superfluous ->last_rx stores 2009-09-02 23:07:36 -07:00
ieee802154 netdev: convert bulk of drivers to netdev_tx_t 2009-09-01 01:14:07 -07:00
infiniband driver model: constify attribute groups 2009-09-15 09:50:47 -07:00
input input: PCAP2 misc input driver 2009-09-17 09:47:12 +02:00
isdn isdn: convert to netdev_tx_t 2009-09-01 01:13:16 -07:00
leds leds: after setting inverted attribute, we must update the LED 2009-08-26 20:06:53 -07:00
lguest lguest and virtio: cleanup struct definitions to Linux style. 2009-07-30 16:03:46 +09:30
macintosh Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2009-09-15 09:51:09 -07:00
mca
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md Merge branch 'for-2.6.32' of git://git.kernel.dk/linux-2.6-block 2009-09-14 17:55:15 -07:00
media Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 2009-09-15 09:22:18 -07:00
memstick
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message Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2009-09-14 17:53:36 -07:00
mfd mfd: Hook WM831x into build system 2009-09-17 09:47:00 +02:00
misc hpilo: add poll f_op 2009-09-15 09:50:48 -07:00
mmc driver model: constify attribute groups 2009-09-15 09:50:47 -07:00
mtd Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2009-09-16 08:27:10 -07:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2009-09-16 08:27:10 -07:00
nubus
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of of/mdio: Add support function for Ethernet fixed-link property 2009-07-22 09:27:18 -07:00
oprofile oprofile: Adding switch counter to oprofile statistic variables 2009-07-20 16:43:21 +02:00
parisc parisc: hppb.c - fix printk format strings 2009-08-02 15:42:39 +02:00
parport
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pci Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 2009-09-16 07:49:54 -07:00
pcmcia Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/pcmcia-2.6 2009-09-16 08:11:23 -07:00
platform hp-wmi: Switch driver to dev_pm_ops 2009-09-14 20:26:59 +02:00
pnp x86: Introduce GDT_ENTRY_INIT(), initialize bad_bios_desc statically 2009-08-10 11:10:52 +02:00
power Merge git://git.infradead.org/users/cbou/battery-2.6.31 2009-07-30 16:45:53 -07:00
pps pps: fix incorrect verdict check 2009-08-26 20:06:52 -07:00
ps3 powerpc/ps3: Workaround for flash memory I/O error 2009-09-11 11:28:00 +10:00
rapidio
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regulator regulator: get pcap data from the parent device 2009-09-17 09:47:13 +02:00
rtc rtc: Add support for RTCs on Wolfson WM831x devices 2009-09-17 09:47:13 +02:00
s390 driver model: constify attribute groups 2009-09-15 09:50:47 -07:00
sbus sparc: Fix cleanup crash in bbc_envctrl_cleanup() 2009-07-17 10:28:19 -07:00
scsi driver model: constify attribute groups 2009-09-15 09:50:47 -07:00
serial Merge branch 'master' into devel 2009-09-12 12:04:37 +01:00
sh
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sn
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spi Merge branch 'master' into devel 2009-09-12 12:04:37 +01:00
ssb ssb: Implement SDIO host bus support 2009-09-09 11:19:00 -04:00
staging Staging: remove sxg driver 2009-09-15 12:02:35 -07:00
tc
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telephony headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
thermal thermal_sys: check get_temp return value 2009-08-26 20:06:52 -07:00
uio uio: add generic driver for PCI 2.3 devices 2009-09-15 09:50:48 -07:00
usb debugfs: Modified default dir of debugfs for debugging UHCI. 2009-09-15 09:50:49 -07:00
uwb driver model: constify attribute groups 2009-09-15 09:50:47 -07:00
video Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 2009-09-16 07:49:54 -07:00
virtio virtio: refactor find_vqs 2009-07-30 16:03:45 +09:30
vlynq
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w1 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-08-12 17:44:53 -07:00
watchdog [WATCHDOG] ar7_wdt: fix path to ar7-specific headers 2009-08-15 13:05:01 +00:00
xen Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2009-09-15 09:39:44 -07:00
zorro
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Kconfig
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Makefile
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