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Haavard Skinnemoen 1eed29df47 atmel_spi throughput improvement 
Don't insert (undesirable) delays between consecutive words (DLYBCT) or when
activating chipselects (DLYBS).

Removing the between-word delays improves the performance of bulk transfers
(such as mtd_dataflash, m25p80, mmc_spi) significantly.  In one test, the
improvement was a factor of more than eight!

(The large DLYBCT value came from the legacy at91 SPI driver, and it's not
clear why it used such a huge value.)

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06 10:41:10 -08:00
..
acorn/char
…
acpi
latency.c: use QoS infrastructure
2008-02-05 09:44:22 -08:00
amba
…
ata
iommu sg merging: sata_inic162x: use pci_set_dma_max_seg_size
2008-02-05 09:44:11 -08:00
atm
…
auxdisplay
…
base
register_cpu __devinit or __cpuinit
2008-02-06 10:41:01 -08:00
block
Atari floppy: Rename disk_type to atari_disk_type
2008-02-06 10:41:10 -08:00
bluetooth
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
2008-02-05 10:09:07 -08:00
cdrom
drivers/cdrom/cdrom.c: simplify logic in cdrom_release()
2008-02-06 10:41:10 -08:00
char
tpm: infineon section mismatch
2008-02-06 10:41:10 -08:00
clocksource
…
connector
[NETNS]: Consolidate kernel netlink socket destruction.
2008-01-28 15:08:07 -08:00
cpufreq
cpufreq: fix obvious condition statement error
2008-01-30 13:33:34 +01:00
cpuidle
pm qos infrastructure and interface
2008-02-05 09:44:22 -08:00
crypto
…
dca
…
dio
dio: ARRAY_SIZE() cleanup
2008-02-05 09:44:23 -08:00
dma
…
edac
drivers/edac/: Spelling fixes
2008-02-03 17:12:34 +02:00
eisa
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firewire
firewire: fw-sbp2: Use sbp2 device-provided mgt orb timeout for logins
2008-01-30 22:22:29 +01:00
firmware
dcdbas: add DMI-based module autloading
2008-02-06 10:41:01 -08:00
gpio
gpiolib: pca9539 i2c gpio expander support
2008-02-05 09:44:13 -08:00
hid
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hwmon
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i2c
deprecate obsolete pca9539 driver
2008-02-05 09:44:13 -08:00
ide
cleanup after APUS removal
2008-02-06 10:41:01 -08:00
ieee1394
ieee1394: sbp2: fix bogus s/g access change
2008-02-02 13:48:16 +01:00
infiniband
RDMA/nes: Add a driver for NetEffect RNICs
2008-02-04 20:20:45 -08:00
input
Remove pointless casts from void pointers
2008-02-06 10:41:01 -08:00
isdn
drivers/isdn/i4l/isdn_tty.c: remove write_sem
2008-02-06 10:41:07 -08:00
leds
leds: add possibility to remove leds classdevs during suspend/resume
2008-02-05 09:44:23 -08:00
lguest
virtio: reset function
2008-02-04 23:50:03 +11:00
macintosh
ppc: fix #ifdef-s in mediabay driver (take 2)
2008-02-06 02:57:50 +01:00
mca
…
md
…
media
scheduled OSS driver removal
2008-02-06 10:41:02 -08:00
message
drivers/message/: Spelling fixes
2008-02-03 17:21:01 +02:00
mfd
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misc
phantom: don't grab other devices
2008-02-06 10:41:10 -08:00
mmc
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mtd
Claim maintainership for block2mtd and update email addresses
2008-02-06 10:41:09 -08:00
net
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
2008-02-05 10:09:07 -08:00
nubus
nubus: kill drivers/nubus/nubus_syms.c
2008-02-05 09:44:23 -08:00
of
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oprofile
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parisc
iommu sg merging: parisc: make iommu respect the segment size limits
2008-02-05 09:44:10 -08:00
parport
parport_pc: detection for SuperIO IT87XX POST
2008-02-06 10:41:08 -08:00
pci
Genericizing iova.[ch]
2008-02-06 10:41:01 -08:00
pcmcia
drivers/pcmcia: add missing pci_dev_get
2008-02-05 09:44:09 -08:00
pnp
git-x86: drivers/pnp/pnpbios/bioscalls.c build fix
2008-01-30 13:32:31 +01:00
power
apm_power: check I.intval for zero value, we use it as the divisor
2008-02-02 02:44:34 +03:00
ps3
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rapidio
Merge branch 'linux-2.6'
2008-01-31 11:25:51 +11:00
rtc
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s390
calibrate_delay() must be __cpuinit
2008-02-06 10:41:08 -08:00
sbus
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scsi
cleanup after APUS removal
2008-02-06 10:41:01 -08:00
serial
SC26XX: New serial driver for SC2681 uarts
2008-02-06 10:41:06 -08:00
sh
…
sn
…
spi
atmel_spi throughput improvement
2008-02-06 10:41:10 -08:00
ssb
drivers/ssb/: Spelling fixes
2008-02-03 17:30:25 +02:00
tc
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telephony
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uio
uio: nopage
2008-02-06 10:41:07 -08:00
usb
Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/pci-2.6
2008-02-02 14:29:33 +11:00
video
cleanup after APUS removal
2008-02-06 10:41:01 -08:00
virtio
virtio: balloon driver
2008-02-04 23:50:13 +11:00
w1
W1: w1_therm.c standardize units to millidegrees C
2008-02-06 10:41:10 -08:00
watchdog
drivers/watchdog/: Spelling fixes
2008-02-03 17:32:52 +02:00
xen
…
zorro
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Kconfig
gpiolib: add drivers/gpio directory
2008-02-05 09:44:12 -08:00
Makefile
gpiolib: add drivers/gpio directory
2008-02-05 09:44:12 -08:00