u-boot.git/drivers/spi, branch v2010.09 Unnamed repository; edit this file 'description' to name the repository. Blackfin: bfin_spi: use same gpio cs define as Linux 2010-09-21T22:22:14+00:00 Mike Frysinger vapier@gentoo.org 2010-09-20T21:54:09+00:00 55fed6fd0b292b37df2a17aeca732194d99440a5 Linux uses an offset of 8 to switch from hardware cs to a gpio cs, so have u-boot use the same value. Also make sure it is public for boards to access. Signed-off-by: Mike Frysinger <vapier@gentoo.org> 
Linux uses an offset of 8 to switch from hardware cs to a gpio cs,
so have u-boot use the same value.  Also make sure it is public
for boards to access.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
AT91/AVR32: atmel_spi.c: flush RDR before next SPI transaction 2010-09-03T09:22:25+00:00 Reinhard Meyer u-boot@emk-elektronik.de 2010-08-09T11:37:59+00:00 f09d3b289689d452b456f77d745188a9e6e2e2ee Signed-off-by: Reinhard Meyer <u-boot@emk-elektronik.de> 
Signed-off-by: Reinhard Meyer <u-boot@emk-elektronik.de>
Merge branch 'master' of ../master 2010-07-15T20:48:46+00:00 Wolfgang Denk wd@denx.de 2010-07-15T20:48:46+00:00 93502a5e0adcfc0ce6cf8e3daa7eb9a4f4e53658 






Blackfin: bfin_spi: support gpios as chip selects
2010-07-13T21:50:50+00:00

Mike Frysinger
vapier@gentoo.org

2010-06-02T10:13:50+00:00

37a4b75d4c30a37bda2bf8ae0c192446425b6f28

Rather than only support the pins dedicated as chip selects, utilize the
gpio framework to support any gpio pin.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>





Rather than only support the pins dedicated as chip selects, utilize the
gpio framework to support any gpio pin.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>







Blackfin: bfin_spi: convert to portmux framework
2010-07-13T21:50:50+00:00

Mike Frysinger
vapier@gentoo.org

2010-06-02T10:12:47+00:00

f3732edf46e8587972041e89aa15336b49f72ffe

Rather than bang MMRs directly, use the new portmux framework to handle
the details.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>





Rather than bang MMRs directly, use the new portmux framework to handle
the details.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>







Davinci: SPI: add the missing v2 patch changes
2010-07-06T00:00:40+00:00

Nick Thompson
nick.thompson@ge.com

2010-07-06T00:00:40+00:00

dce6538f5d21a0def8a4df5328d536abed3e136a

Two Indentation fixes.

Catch requests for full-duplex transfers when driver configured for
half-duplex operation only.

Signed-off-by: Nick Thompson <nick.thompson@ge.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>





Two Indentation fixes.

Catch requests for full-duplex transfers when driver configured for
half-duplex operation only.

Signed-off-by: Nick Thompson <nick.thompson@ge.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>







Davinci: SPI performance enhancements
2010-06-22T15:06:01+00:00

Nick Thompson
nick.thompson@ge.com

2010-06-22T15:06:01+00:00

77436d6696127dcaa9049db47b000da7f2b8e85e

The following restructuring and optimisations increase the SPI
read performance from 1.3MiB/s (on da850) to 2.87MiB/s (on da830):

Remove continual revaluation of driver state from the core of the
copy loop. State can not change during the copy loop, so it is
possible to move these evaluations to before the copy loop.

Cost is more code space as loop variants are required for each set
of possible configurations. The loops are simpler however, so the
extra is only 128bytes on da830 with CONFIG_SPI_HALF_DUPLEX
defined.

Unrolling the first copy loop iteration allows the TX buffer to be
pre-loaded reducing SPI clock starvation.

Unrolling the last copy loop iteration removes testing for the
final loop iteration every time round the loop.

Using the RX buffer empty flag as a transfer throttle allows the
assumption that it is always safe to write to the TX buffer, so
polling of TX buffer full flag can be removed.

Signed-off-by: Nick Thompson <nick.thompson@ge.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>





The following restructuring and optimisations increase the SPI
read performance from 1.3MiB/s (on da850) to 2.87MiB/s (on da830):

Remove continual revaluation of driver state from the core of the
copy loop. State can not change during the copy loop, so it is
possible to move these evaluations to before the copy loop.

Cost is more code space as loop variants are required for each set
of possible configurations. The loops are simpler however, so the
extra is only 128bytes on da830 with CONFIG_SPI_HALF_DUPLEX
defined.

Unrolling the first copy loop iteration allows the TX buffer to be
pre-loaded reducing SPI clock starvation.

Unrolling the last copy loop iteration removes testing for the
final loop iteration every time round the loop.

Using the RX buffer empty flag as a transfer throttle allows the
assumption that it is always safe to write to the TX buffer, so
polling of TX buffer full flag can be removed.

Signed-off-by: Nick Thompson <nick.thompson@ge.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>







Merge branch 'master' of git://git.denx.de/u-boot-arm
2010-06-17T19:06:16+00:00

Wolfgang Denk
wd@denx.de

2010-06-17T19:06:16+00:00

399b09331f313d57b16b583f453387231d217f15












DaVinci: Improve DaVinci SPI speed.
2010-06-08T15:07:19+00:00

Delio Brignoli
dbrignoli@audioscience.com

2010-06-07T21:16:13+00:00

9268236529161312c877e638a14c011fd3c883e1

I have updated this patch based on the comments [1] by Wolfgang Denk and
removed unused variables.
[1][http://lists.denx.de/pipermail/u-boot/2010-May/071728.html]

Reduce the number of reads per byte transferred on the BUF register from 2 to 1 and
take advantage of the TX buffer in the SPI module. On LogicPD OMAP-L138 EVM,
SPI read throughput goes up from ~0.8Mbyte/s to ~1.3Mbyte/s. Tested with a 2Mbyte image file.
Remove unused variables in the spi_xfer() function.

Signed-off-by: Delio Brignoli <dbrignoli@audioscience.com>
Tested-by: Ben Gardiner <bengardiner@nanometrics.ca>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>





I have updated this patch based on the comments [1] by Wolfgang Denk and
removed unused variables.
[1][http://lists.denx.de/pipermail/u-boot/2010-May/071728.html]

Reduce the number of reads per byte transferred on the BUF register from 2 to 1 and
take advantage of the TX buffer in the SPI module. On LogicPD OMAP-L138 EVM,
SPI read throughput goes up from ~0.8Mbyte/s to ~1.3Mbyte/s. Tested with a 2Mbyte image file.
Remove unused variables in the spi_xfer() function.

Signed-off-by: Delio Brignoli <dbrignoli@audioscience.com>
Tested-by: Ben Gardiner <bengardiner@nanometrics.ca>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>







spi: add altera spi controller support
2010-05-28T14:56:03+00:00

Thomas Chou
thomas@wytron.com.tw

2010-04-30T03:34:16+00:00

661ba14051db6766932fcb50ba1ec7c67f230054

This patch adds the driver of altera spi controller, which is
used as epcs/spi flash controller. It also works with mmc_spi
driver.

This driver support more than one spi bus, with base list declared
#define CONFIG_SYS_ALTERA_SPI_LIST { BASE_0,BASE_1,... }

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Tested-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Scott McNutt <smcnutt@psyent.com>





This patch adds the driver of altera spi controller, which is
used as epcs/spi flash controller. It also works with mmc_spi
driver.

This driver support more than one spi bus, with base list declared
#define CONFIG_SYS_ALTERA_SPI_LIST { BASE_0,BASE_1,... }

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Tested-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Scott McNutt <smcnutt@psyent.com>