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Dirk Eibach 763d9c046a i2c: fix broken ds1337 initialization 
On a custom board with ds1337 RTC I found that upgrade from 2.6.15 to
2.6.18 broke RTC support.

The main problem are changes to ds1337_init_client().
When a ds1337 recognizes a problem (e.g. power or clock failure) bit 7
in status register is set. This has to be reset by writing 0 to status
register. But since there are only 16 byte written to the chip and the
first byte is interpreted as an address, the status register (which is
the 16th) is never written.
The other problem is, that initializing all registers to zero is not
valid for day, date and month register. Funny enough this is checked by
ds1337_detect(), which depends on this values not being zero. So then
treated by ds1337_init_client() the ds1337 is not detected anymore,
whereas the failure bit in the status register is still set.

Signed-off-by: Dirk Stieler <stieler@gdsys.de>
Signed-off-by: Dirk Eibach <eibach@gdsys.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2006-12-10 21:21:31 +01:00
..
acorn IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
acpi Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2006-12-05 17:01:28 +00:00
amba [ARM] Fix __must_check warnings in drivers/bus/amba.c 2006-11-30 14:04:49 +00:00
ata [PATCH] libata: Incorrect timing computation for PIO5/6 2006-12-07 07:37:07 -05:00
atm [PATCH] atm/ambassador: use bitrev8 2006-12-08 08:28:40 -08:00
base Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6 2006-12-07 08:59:11 -08:00
block [PATCH] struct path: convert nbd 2006-12-08 08:28:47 -08:00
bluetooth [PATCH] lockdep: annotate bcsp driver 2006-12-07 08:39:34 -08:00
cdrom [PATCH] drivers/cdrom/*: trivial vsnprintf() conversion 2006-12-07 08:39:35 -08:00
char Merge branch 'drm-patches' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2006-12-09 12:26:37 -08:00
clocksource [PATCH] time: re-add verify_pmtmr_rate 2006-12-08 08:28:37 -08:00
connector WorkStruct: make allyesconfig 2006-11-22 14:57:56 +00:00
cpufreq [PATCH] hotplug CPU: clean up hotcpu_notifier() use 2006-12-07 08:39:39 -08:00
crypto [CRYPTO] geode: Make needlessly global geode_aes_crypt() static 2006-12-06 18:38:53 -08:00
dio
dma [PATCH] slab: remove SLAB_KERNEL 2006-12-07 08:39:24 -08:00
edac [PATCH] Add include/linux/freezer.h and move definitions from sched.h 2006-12-07 08:39:27 -08:00
eisa [PATCH] EISA: handle sysfs errors 2006-10-11 11:14:25 -07:00
fc4 [SCSI] fc4: Conversion to struct scsi_cmnd in fc4 2006-10-25 15:12:45 -07:00
firmware [PATCH] dell_rbu: fix error check 2006-11-16 11:43:38 -08:00
hid [PATCH] Generic HID layer - build 2006-12-08 10:43:20 -08:00
hwmon [PATCH] severing fs.h, radix-tree.h -> sched.h 2006-12-04 02:00:24 -05:00
i2c i2c: fix broken ds1337 initialization 2006-12-10 21:21:31 +01:00
ide [PATCH] sl82c105: straighten up IDE control/status register caching 2006-12-08 08:29:03 -08:00
ieee1394 [PATCH] struct path: convert ieee1394 2006-12-08 08:28:46 -08:00
infiniband [PATCH] LOG2: Implement a general integer log2 facility in the kernel 2006-12-08 08:28:51 -08:00
input [PATCH] Generic HID layer - build 2006-12-08 10:43:20 -08:00
isdn [PATCH] ISDN: fix warnings 2006-12-08 08:29:01 -08:00
leds [PATCH] PCEngines WRAP LED Support 2006-12-07 08:39:36 -08:00
macintosh Merge rsync://rsync.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2006-12-08 01:07:56 -05:00
mca [PATCH] drivers/mca: handle sysfs errors 2006-10-11 11:14:25 -07:00
md [PATCH] make drivers/md/dm-snap.c:ksnapd static 2006-12-08 08:29:09 -08:00
media [PATCH] struct path: convert v4l 2006-12-08 08:28:50 -08:00
message [PATCH] kernel-doc: fix fusion and i2o docs 2006-12-07 08:39:40 -08:00
mfd [PATCH] Add include/linux/freezer.h and move definitions from sched.h 2006-12-07 08:39:27 -08:00
misc [PATCH] tifm: fix NULL ptr and style 2006-12-07 08:39:33 -08:00
mmc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc 2006-12-08 08:47:07 -08:00
mtd [PATCH] slab: remove SLAB_KERNEL 2006-12-07 08:39:24 -08:00
net [PATCH] Amiga PCMCIA NE2000 Ethernet dev->irq init 2006-12-09 09:41:18 -08:00
nubus
oprofile [PATCH] struct path: convert oprofile 2006-12-08 08:28:48 -08:00
parisc Fix misc .c/.h comment typos 2006-11-30 05:24:39 +01:00
parport [PATCH] parport: section mismatches with HOTPLUG=n 2006-12-07 08:39:40 -08:00
pci [PATCH] struct path: convert pci 2006-12-08 08:28:48 -08:00
pcmcia [PATCH] struct path: convert pcmcia 2006-12-08 08:28:48 -08:00
pnp [PATCH] struct path: convert isapnp 2006-12-08 08:28:46 -08:00
ps3 [POWERPC] ps3: multiplatform build fixes 2006-12-04 20:41:16 +11:00
rapidio Fix several typos in drivers/ 2006-10-03 22:31:37 +02:00
rtc [PATCH] rtc: ds1743 support 2006-12-07 08:39:43 -08:00
s390 Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6 2006-12-08 11:21:55 -08:00
sbus [PATCH] struct path: convert sbus 2006-12-08 08:28:49 -08:00
scsi [PATCH] Sun3 SCSI: Make sun3 scsi drivers compile/work again 2006-12-09 09:41:18 -08:00
serial [PATCH] tty: switch to ktermios 2006-12-08 08:28:57 -08:00
sh
sn [PATCH] ioc4: Enable build on non-SN2 2006-10-17 08:18:42 -07:00
spi [PATCH] spi: check platform_device_register_simple() error 2006-12-07 08:39:42 -08:00
tc [PATCH] tty: switch to ktermios 2006-12-08 08:28:57 -08:00
telephony [PATCH] struct path: convert ixj 2006-12-08 08:28:46 -08:00
usb [PATCH] Generic HID layer - build 2006-12-08 10:43:20 -08:00
video [PATCH] video: neofb stray bracket fix 2006-12-08 08:29:08 -08:00
w1 [PATCH] better CONFIG_W1_SLAVE_DS2433_CRC handling 2006-12-07 08:39:43 -08:00
zorro [PATCH] struct path: convert zorro 2006-12-08 08:28:50 -08:00
Kconfig [PATCH] Generic HID layer - build 2006-12-08 10:43:20 -08:00
Makefile [PATCH] Generic HID layer - build 2006-12-08 10:43:20 -08:00