Daniel Kurtz
0da2e7768b
i2c: s3c2410: do not generate STOP for QUIRK_HDMIPHY ...
The datasheet says that the STOP sequence should be:
1) I2CSTAT.5 = 0 - Clear BUSY (or 'generate STOP')
2) I2CCON.4 = 0 - Clear IRQPEND
3) Wait until the stop condition takes effect.
4*) I2CSTAT.4 = 0 - Clear TXRXEN
Where, step "4*" is only for buses with the "HDMIPHY" quirk.
However, after much experimentation, it appears that:
a) normal buses automatically clear BUSY and transition from
Master->Slave when they complete generating a STOP condition.
Therefore, step (3) can be done in doxfer() by polling I2CCON.4
after starting the STOP generation here.
b) HDMIPHY bus does neither, so there is no way to do step 3.
There is no indication when this bus has finished generating STOP.
In fact, we have found that as soon as the IRQPEND bit is cleared in
step 2, the HDMIPHY bus generates the STOP condition, and then immediately
starts transferring another data byte, even though the bus is supposedly
stopped. This is presumably because the bus is still in "Master" mode,
and its BUSY bit is still set.
To avoid these extra post-STOP transactions on HDMI phy devices, we just
disable Serial Output on the bus (I2CSTAT.4 = 0) directly, instead of
first generating a proper STOP condition. This should float SDA & SCK
terminating the transfer. Subsequent transfers start with a proper START
condition, and proceed normally.
The HDMIPHY bus is an internal bus that always has exactly two devices,
the host as Master and the HDMIPHY device as the slave. Skipping the STOP
condition has been tested on this bus and works.
Also, since we disable the bus directly from the isr, we can skip the bus
idle polling loop at the end of doxfer().
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
2012-11-16 13:08:55 +01:00
ACPI video: Ignore errors after _DOD evaluation.
2012-11-03 09:52:54 +08:00
Merge branch 'samsung_platform_data' into staging/for_v3.7
2012-10-05 22:32:05 -03:00
sections: fix section conflicts in drivers/atm
2012-10-06 03:04:40 +09:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
2012-11-10 21:58:34 +01:00
bcma: fix unregistration of cores
2012-10-15 14:45:51 -04:00
loop: Make explicit loop device destruction lazy
2012-10-30 08:37:31 +01:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2012-10-02 13:38:27 -07:00
drivers: bus: omap_l3: fixup merge conflict resolution
2012-10-01 19:39:48 -07:00
sonypi: suspend/resume callbacks should be conditionally compiled on CONFIG_PM_SLEEP
2012-10-25 12:05:50 -07:00
spi: Updates for v3.7
2012-10-02 17:26:42 -07:00
Power management updates for 3.7-rc1
2012-10-02 18:32:35 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2012-10-02 13:38:27 -07:00
cpufreq / powernow-k8: Change maintainer's email address
2012-10-31 21:02:57 +01:00
ACPI idle, CPU hotplug: Fix NULL pointer dereference during hotplug
2012-10-08 22:52:54 -04:00
ARM: soc: late platform updates
2012-10-07 20:55:16 +09:00
Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma
2012-10-26 14:59:01 -07:00
amd64_edac:__amd64_set_scrub_rate(): avoid overindexing scrubrates[]
2012-10-24 16:13:27 +02:00
extcon : register for cable interest by cable name
2012-10-23 16:32:18 +09:00
firewire: cdev: fix user memory corruption (i386 userland on amd64 kernel)
2012-10-09 18:26:28 +02:00
firmware/memmap: avoid type conflicts with the generic memmap_init()
2012-10-19 14:07:47 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
2012-11-10 21:58:34 +01:00
drm/vmwgfx: Fix a case where the code would BUG when trying to pin GMR memory
2012-11-09 20:49:06 +10:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
2012-11-09 06:56:23 +01:00
Drivers: hv: Cleanup error handling in vmbus_open()
2012-10-24 15:46:27 -07:00
hwmon: Fix chip feature table headers
2012-11-05 21:54:40 +01:00
i2c: s3c2410: do not generate STOP for QUIRK_HDMIPHY
2012-11-16 13:08:55 +01:00
sections: fix section conflicts in drivers/ide
2012-10-06 03:04:41 +09:00
iio: Remove duplicates for light/ in Kconfig and Makefile
2012-10-19 19:44:06 +01:00
Merge branches 'cxgb4' and 'mlx4' into for-next
2012-10-23 09:03:49 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2012-11-02 16:11:15 -07:00
iommu/tegra: smmu: Fix deadly typo
2012-10-24 16:58:53 +02:00
isdn: Make CONFIG_ISDN depend on CONFIG_NETDEVICES
2012-11-07 18:59:26 -05:00
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds
2012-10-10 20:14:07 +09:00
Merge branch 'virtio-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
2012-10-07 21:04:56 +09:00
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
2012-10-06 03:16:12 +09:00
MD RAID10: Fix oops when creating RAID10 arrays via dm-raid.c
2012-10-31 11:42:30 +11:00
[media] Kconfig: Fix dependencies for driver autoselect options
2012-10-17 16:45:56 -03:00
1. New drivers:
2012-10-07 17:29:24 +09:00
pwm: Changes for v3.7-rc1
2012-10-10 20:15:24 +09:00
mmc: sdhci-s3c: fix the card detection in runtime-pm
2012-11-07 15:40:52 -05:00
mtd: Disable mtdchar mmap on MMU systems
2012-10-09 15:08:42 +01:00
gianfar: ethernet vanishes after restoring from hibernation
2012-11-09 17:08:36 -05:00
of/platform: sparse fix
2012-10-17 15:53:03 -05:00
mm: use mm->exe_file instead of first VM_EXECUTABLE vma->vm_file
2012-10-09 16:22:18 +09:00
Xtensa patchset for 3.7
2012-10-09 16:11:46 +09:00
PCI/portdrv: Don't create hotplug slots unless port supports hotplug
2012-11-05 16:59:59 -07:00
Merge branch 'testing/driver-warnings' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc into fixes
2012-10-19 15:40:18 -07:00
pinctrl: samsung and exynos need to depend on OF && GPIOLIB
2012-11-06 10:02:14 +01:00
Merge branches 'fixes-for-37', 'ec' and 'thermal' into release
2012-10-09 01:47:35 -04:00
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
2012-10-13 11:27:59 +09:00
idr: rename MAX_LEVEL to MAX_IDR_LEVEL
2012-10-06 03:04:56 +09:00
pwm: Changes for v3.7-rc1
2012-10-10 20:15:24 +09:00
rapidio: update for destination ID allocation
2012-10-11 08:50:15 +09:00
MFD bits for the 3.7 merge window.
2012-10-05 12:01:30 +09:00
Merge branch 'virtio-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
2012-10-07 21:04:56 +09:00
Merge branch 'virtio-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
2012-10-07 21:04:56 +09:00
drivers/rtc/rtc-imxdi.c: add missing spin lock initialization
2012-10-25 14:37:53 -07:00
s390/cio: fix length calculation in idset.c
2012-11-06 22:39:54 +01:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
2012-11-10 21:58:34 +01:00
sh: Fix up more fallout from pointless ARM __iomem churn.
2012-10-15 14:08:48 +09:00
spi: Some minor MXS fixes
2012-10-28 11:13:54 -07:00
Staging driver fixes for 3.7-rc3
2012-10-26 10:25:31 -07:00
target: Fix incorrect usage of nested IRQ spinlocks in ABORT_TASK path
2012-11-01 00:38:45 -07:00
exynos4_tmu_driver_ids should be exynos_tmu_driver_ids.
2012-11-03 09:52:55 +08:00
Revert "serial: omap: fix software flow control"
2012-10-24 11:57:21 -07:00
mm: kill vma flag VM_RESERVED and mm->reserved_vm counter
2012-10-09 16:22:19 +09:00
usb: gadget: g_ether: fix frame size check for 802.1Q
2012-11-07 21:12:26 -05:00
vfio: Fix PCI INTx disable consistency
2012-10-10 09:10:32 -06:00
vhost: fix mergeable bufs on BE hosts
2012-10-24 23:19:30 -04:00
Bug-fixes:
2012-11-02 13:26:11 -07:00
virtio: Don't access index after unregister.
2012-11-09 14:54:24 +10:30
char/misc driver merge for 3.7-rc1
2012-10-01 12:09:59 -07:00
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu
2012-10-07 21:06:10 +09:00
Bug-fixes:
2012-11-10 06:56:21 +01:00
ARM: soc: driver specific changes
2012-10-01 18:46:13 -07:00
IPMI: Change link order
2012-10-16 18:07:12 -07:00
0da2e7768b