Albrecht Dreß
0c2daaafcd
powerpc/5200/i2c: improve i2c bus error recovery ...
This patch improves the recovery of the MPC's I2C bus from errors like bus
hangs resulting in timeouts:
1. make the bus timeout configurable, as it depends on the bus clock and
the attached slave chip(s); default is still 1 second;
2. detect any of the cases indicated by the CF, BB and RXAK MSR flags if a
timeout occurs, and add a missing (required) MAL reset;
3. use a more reliable method to fixup the bus if a hang has been detected.
The sequence is sent 9 times which seems to be necessary if a slave
"misses" more than one clock cycle. For 400 kHz bus speed, the fixup is
also ~70us (81us vs. 150us) faster.
Tested on a custom Lite5200b derived board, with a Dallas RTC, AD sensors
and NXP IO expander chips attached to the i2c.
Changes vs. v1:
- use improved bus fixup sequence for all chips (not only the 5200)
- calculate real clock from defaults if no clock is given in the device tree
- better description (I hope) of the changes.
I didn't split the changes in this file into three parts as recommended by
Grant, as they actually belong together (i.e. they address one single
problem, just in three places of one single source file).
Signed-off-by: Albrecht Dreß <albrecht.dress@arcor.de>
[grant.likely@secretlab.ca: fixup for ->node to ->dev.of_node transition]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-08-01 17:06:44 -06:00
correct console log level when ERST ACPI table is not found
2010-07-01 18:40:29 -07:00
ata_generic: implement ATA_GEN_* flags and force enable DMA on MBP 7,1
2010-07-01 15:34:48 -04:00
cciss: set SCSI max cmd len to 16, as default is wrong
2010-06-15 08:12:34 +02:00
drivers: bluetooth: bluecard_cs.c: Fixed include error, changed to linux/io.h
2010-07-01 21:28:14 -07:00
sysrq,kdb: Use __handle_sysrq() for kdb's sysrq function
2010-07-21 19:27:07 -05:00
Andres has moved
2010-07-20 16:25:41 -07:00
sched: Cure nr_iowait_cpu() users
2010-07-01 09:39:48 +02:00
crypto: talitos - fix bug in sg_copy_end_to_buffer
2010-07-19 14:11:24 +08:00
of/dma: fix build breakage in ppc4xx adma driver
2010-07-02 15:46:17 -06:00
edac: mpc85xx: add support for MPC8569 EDAC controllers
2010-07-20 16:25:40 -07:00
Andres has moved
2010-07-20 16:25:41 -07:00
Merge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
2010-07-22 11:45:57 -07:00
HID: Send Report ID when numbered reports are sent over the control endpoint.
2010-07-11 23:13:15 +02:00
hwmon: (coretemp) Properly label the sensors
2010-07-09 16:22:51 +02:00
powerpc/5200/i2c: improve i2c bus error recovery
2010-08-01 17:06:44 -06:00
IB/qib: Use request_firmware() to load SD7220 firmware
2010-07-08 13:27:05 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2010-07-22 11:46:15 -07:00
ISDN: hysdn, fix potential NULL dereference
2010-06-26 22:12:02 -07:00
i2c: Remove all i2c_set_clientdata(client, NULL) in drivers
2010-06-03 11:33:58 +02:00
Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
2010-06-03 15:46:37 -07:00
md/raid5: don't include 'spare' drives when reshaping to fewer devices.
2010-06-24 13:36:04 +10:00
V4L/DVB: v4l: mem2mem_testdev: fix g_fmt NULL pointer dereference
2010-07-08 16:50:24 -03:00
i2c: Remove all i2c_set_clientdata(client, NULL) in drivers
2010-06-03 11:33:58 +02:00
Andres has moved
2010-07-20 16:25:41 -07:00
sdhci-s3c: add missing remove function
2010-07-20 16:25:41 -07:00
Merge git://git.infradead.org/~dwmw2/mtd-2.6.35
2010-06-07 17:10:06 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
2010-07-20 16:26:42 -07:00
PCI: fall back to original BIOS BAR addresses
2010-07-16 11:39:48 -07:00
pcmcia: fix 'driver ... did not release config properly' warning
2010-07-21 13:52:36 +02:00
intel_scu_ipc: Oops/crash fixes
2010-07-19 13:17:37 -07:00
Merge git://git.infradead.org/users/cbou/battery-2.6.35
2010-07-20 08:22:15 -07:00
i2c: Remove all i2c_set_clientdata(client, NULL) in drivers
2010-06-03 11:33:58 +02:00
rtc: fix ds1388 time corruption
2010-06-29 15:29:31 -07:00
[S390] cio: fix potential overflow in chpid descriptor
2010-07-19 09:22:50 +02:00
drivers/sbus: Remove unnecessary casts of private_data
2010-07-12 21:16:04 -07:00
Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev
2010-06-03 15:48:15 -07:00
powerpc/5200: improve uart baud rate calculation (reach high baud rates, better accuracy)
2010-07-24 18:27:57 -06:00
powerpc/cpm: Reintroduce global spi_pram struct (fixes build issue)
2010-07-11 11:03:22 -05:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6
2010-06-30 15:45:59 -07:00
Fix up trivial spelling errors ('taht' -> 'that')
2010-07-21 09:25:42 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
2010-07-20 16:26:42 -07:00
of/xilinxfb: update tft compatible versions
2010-08-01 17:06:44 -06:00
virtio-pci: disable msi at startup
2010-06-23 22:49:07 +09:30
watchdog: at32ap700x_wdt: register misc device last in probe() function
2010-06-17 09:56:57 +00:00
0c2daaafcd