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Joonyoung Shim ff02c0444b rtc: s5m: fix to update ctrl register 
According to datasheet, the S2MPS13X and S2MPS14X should update write
buffer via setting WUDR bit to high after ctrl register is written.

If not, ALARM interrupt of rtc-s5m doesn't happen first time when i use
tools/testing/selftests/timers/rtctest.c test program and hour format is
used to 12 hour mode in Odroid-XU3 board.

One more issue is the RTC doesn't keep time on Odroid-XU3 board when i
turn on board after power off even if RTC battery is connected. It can
be solved as setting WUDR & RUDR bits to high at the same time after
RTC_CTRL register is written. It's same with condition of only writing
ALARM registers, so this is for only S2MPS14 and we should set WUDR &
A_UDR bits to high on S2MPS13.

I can't find any reasonable description about this like fix from
datasheet, but can find similar codes from rtc driver source of
hardkernel kernel and vendor kernel.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Cc: <stable@vger.kernel.org> # v3.16
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2015-09-05 19:37:19 +02:00
..
accessibility
acpi Power management and ACPI material for v4.3-rc1 2015-09-01 19:45:46 -07:00
amba
android
ata Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-09-03 16:55:55 -07:00
atm
auxdisplay
base sound updates for 4.3-rc1 2015-09-04 11:46:02 -07:00
bcma
block Merge branch 'for-4.3/drivers' of git://git.kernel.dk/linux-block 2015-09-02 13:14:58 -07:00
bluetooth Bluetooth: hci_bcm: Fix crash on suspend 2015-08-28 21:09:14 +02:00
bus MIPS: Remove "weak" from mips_cdmm_phys_base() declaration 2015-09-03 12:07:39 +02:00
cdrom
char Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2015-09-04 15:49:32 -07:00
clk This is the bulk of pin control changes for the v4.3 development 2015-09-04 10:22:09 -07:00
clocksource - New Device Support 2015-09-04 11:35:03 -07:00
connector
cpufreq Power management and ACPI material for v4.3-rc1 2015-09-01 19:45:46 -07:00
cpuidle Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2015-09-03 16:27:01 -07:00
crypto Merge branch 'for-4.3/sg' of git://git.kernel.dk/linux-block 2015-09-02 13:22:38 -07:00
dca
devfreq
dio
dma dmaengine updates for 4.3-rc1 2015-09-04 11:10:18 -07:00
dma-buf
edac Minor stuff: AMD MCE decoding correction and xgene_edac cleanup. 2015-09-01 18:34:22 -07:00
eisa
extcon regulator: Updates for v4.3 2015-08-31 15:49:19 -07:00
firewire
firmware Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2015-09-03 16:27:01 -07:00
fmc
gpio Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2015-09-04 15:49:32 -07:00
gpu Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2015-09-04 15:49:32 -07:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2015-09-04 12:02:11 -07:00
hsi
hv
hwmon hwmon: (fam15h_power) Add ratio of Tsample to the PTSC period 2015-08-27 07:53:19 -07:00
hwspinlock
hwtracing/coresight
i2c - New Device Support 2015-09-04 11:35:03 -07:00
ide
idle
iio This is the bulk of GPIO changes for the v4.3 kernel cycle: 2015-09-04 10:07:45 -07:00
infiniband
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2015-09-04 12:02:11 -07:00
iommu Merge branch 'for-4.3/sg' of git://git.kernel.dk/linux-block 2015-09-02 13:22:38 -07:00
ipack
irqchip Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-09-03 16:55:55 -07:00
isdn Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2015-09-03 08:08:17 -07:00
leds - Stop using LP855X Platform Data to control regulators 2015-09-04 11:40:40 -07:00
lguest
macintosh powerpc updates for 4.3 2015-09-03 16:41:38 -07:00
mailbox Power management and ACPI material for v4.3-rc1 2015-09-01 19:45:46 -07:00
mcb
md Merge tag 'dm-4.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm 2015-09-02 16:35:26 -07:00
media This is the bulk of GPIO changes for the v4.3 kernel cycle: 2015-09-04 10:07:45 -07:00
memory powerpc updates for 4.3 2015-09-03 16:41:38 -07:00
memstick
message mptfusion: prevent some memory corruption 2015-08-26 07:11:45 -07:00
mfd Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2015-09-04 15:49:32 -07:00
misc powerpc updates for 4.3 2015-09-03 16:41:38 -07:00
mmc Merge branch 'for-4.3/sg' of git://git.kernel.dk/linux-block 2015-09-02 13:22:38 -07:00
mtd powerpc updates for 4.3 2015-09-03 16:41:38 -07:00
net Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-09-03 16:55:55 -07:00
nfc This is the bulk of GPIO changes for the v4.3 kernel cycle: 2015-09-04 10:07:45 -07:00
ntb
nubus
nvdimm Merge branch 'for-4.3/core' of git://git.kernel.dk/linux-block 2015-09-02 13:10:25 -07:00
nvmem
of arm64 updates for 4.3: 2015-09-04 07:18:09 -07:00
oprofile
parisc Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-09-01 14:33:35 -07:00
parport
pci Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-09-01 14:33:35 -07:00
pcmcia pcmcia: soc_common: remove skt_dev_info's clk pointer 2015-09-03 16:01:03 +01:00
perf
phy This is the bulk of GPIO changes for the v4.3 kernel cycle: 2015-09-04 10:07:45 -07:00
pinctrl This is the bulk of pin control changes for the v4.3 development 2015-09-04 10:22:09 -07:00
platform Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2015-09-04 12:02:11 -07:00
pnp
power Power management and ACPI material for v4.3-rc1 2015-09-01 19:45:46 -07:00
powercap powercap / RAPL: disable the 2nd power limit properly 2015-08-29 01:46:40 +02:00
pps
ps3
ptp
pwm
rapidio
ras
regulator Merge remote-tracking branch 'regulator/topic/tps6586x' into regulator-next 2015-08-30 14:40:29 +01:00
remoteproc
reset
rpmsg
rtc rtc: s5m: fix to update ctrl register 2015-09-05 19:37:19 +02:00
s390 Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-09-03 15:46:07 -07:00
sbus
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2015-09-03 08:08:17 -07:00
sfi
sh
sn
soc ARM: SoC driver updates for v4.3 2015-09-01 13:00:04 -07:00
spi Merge remote-tracking branches 'spi/topic/ti-qspi', 'spi/topic/xcomm' and 'spi/topic/xlp' into spi-next 2015-08-31 14:45:45 +01:00
spmi Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-09-01 14:33:35 -07:00
ssb
staging Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-09-03 16:55:55 -07:00
target Merge branch 'for-4.3/sg' of git://git.kernel.dk/linux-block 2015-09-02 13:22:38 -07:00
tc
thermal Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-09-01 08:40:25 -07:00
thunderbolt
tty Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-09-03 16:55:55 -07:00
uio
usb Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2015-09-01 18:46:42 -07:00
uwb
vfio
vhost
video Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2015-09-04 15:49:32 -07:00
virt
virtio
vlynq
vme
w1 Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2015-09-01 18:46:42 -07:00
watchdog - New Device Support 2015-09-04 11:35:03 -07:00
xen Power management and ACPI material for v4.3-rc1 2015-09-01 19:45:46 -07:00
zorro
Kconfig Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2015-09-03 16:27:01 -07:00
Makefile This is the bulk of pin control changes for the v4.3 development 2015-09-04 10:22:09 -07:00