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698ca47e8d
kernel-ark/drivers
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Clifford Wolf 698ca47e8d spi_mpc83xx.c underclocking hotfix 
The MPC83xx SPI controller clock divider can divide the system clock by not
more then 1024.  The spi_mpc83xx driver does not check this and silently
writes garbage to the SPI controller registers when asked to run at lower
frequencies.  I've tried to run the SPI on a 266MHz MPC8349E with 100kHz
for debugging a bus problem and suddenly was confronted with a 2nd problem
to debug..  ;-)

The patch adds an additional check which avoids writing garbage to the SPI
controller registers and warn the user about it.  This might help others to
avoid simmilar problems.

Cc: Kumar Gala <galak@gate.crashing.org>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17 10:23:04 -07:00
..
acorn
acpi
amba
ata
atm Introduce CONFIG_VIRT_TO_BUS 2007-07-16 09:05:42 -07:00
auxdisplay Use menuconfig objects II - auxdisplay 2007-07-16 09:05:40 -07:00
base dma: make dma pool to use kmalloc_node 2007-07-16 09:05:51 -07:00
block unregister_blkdev(): delete redundant message 2007-07-17 10:23:03 -07:00
bluetooth
cdrom bsg: add a request_queue argument to scsi_cmd_ioctl() 2007-07-16 08:52:45 +02:00
char Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
clocksource
connector Use menuconfig objects: connector 2007-07-16 09:05:40 -07:00
cpufreq [CPUFREQ] Restore previously used governor on a hot-replugged CPU 2007-07-13 01:29:51 -04:00
crypto Use menuconfig objects: crypto hw 2007-07-16 09:05:40 -07:00
dio
dma dma-mapping: prevent dma dependent code from linking on !HAS_DMA archs 2007-07-16 09:05:45 -07:00
edac Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
eisa
fc4
firewire
firmware edd: switch to pci_get based API 2007-07-16 09:05:42 -07:00
hid USB: add reset_resume method 2007-07-12 16:34:30 -07:00
hwmon SPI: add 3wire mode flag 2007-07-17 10:23:04 -07:00
i2c parse error, drivers/i2c/busses/i2c-pmcmsp.c 2007-07-17 10:22:59 -07:00
ide Slab allocators: Replace explicit zeroing with __GFP_ZERO 2007-07-17 10:23:02 -07:00
ieee1394 Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
infiniband Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2007-07-15 16:51:54 -07:00
input Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
isdn
kvm
leds
macintosh Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
mca
md unregister_blkdev() delete redundant messages in callers 2007-07-17 10:23:03 -07:00
media Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
message Introduce CONFIG_VIRT_TO_BUS 2007-07-16 09:05:42 -07:00
mfd Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
misc IBMASM: must depend on CONFIG_INPUT 2007-07-17 10:23:04 -07:00
mmc Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
mtd Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
net Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
nubus
oprofile
parisc
parport parport_pc: it887x fix 2007-07-16 09:05:50 -07:00
pci Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2007-07-16 17:58:08 -07:00
pcmcia powerpc: 8xx: fix whitespace and indentation 2007-07-17 10:23:02 -07:00
pnp Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
power Merge git://git.infradead.org/battery-2.6 2007-07-15 16:56:12 -07:00
ps3
rapidio
rtc Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2007-07-16 17:58:08 -07:00
s390 unregister_blkdev() delete redundant messages in callers 2007-07-17 10:23:03 -07:00
sbus unregister_blkdev() delete redundant messages in callers 2007-07-17 10:23:03 -07:00
scsi Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
serial sb1250-duart.c: SB1250 DUART serial support 2007-07-17 10:23:03 -07:00
sh
sn
spi spi_mpc83xx.c underclocking hotfix 2007-07-17 10:23:04 -07:00
tc
telephony Use menuconfig objects II - Telephony 2007-07-16 09:05:40 -07:00
usb Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
video Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
w1 Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
zorro
Kconfig
Makefile