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path: root/drivers/spi/spi_butterfly.c
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* spi/bitbang: add support for SPI_MASTER_NO_{TX, RX} modesMarek Szyprowski2010-07-031-1/+1
| | | | | | | | | | | | | | | | This patch adds a new flags argument to bitbang_txrx_be_cpha0 and bitbang_txrx_be_cpha1 transfer functions. This enables support for SPI_MASTER_NO_{TX,RX} transfer modes. The change should have no impact on speed of the existing drivers. bitbank_txrx_* functions are usually inlined into the drivers. When the argument is equal to constant zero, the optimizer would be able to eliminate the dead code (flags checks) easily. Tested on ARM and GCC 4.4.x and in all cases the checks were eliminated in the inlined function. Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* spi: move bitbang txrx utility functions to private headerhartleys2010-05-251-2/+1
| | | | | | | | | | | | | | | | | | | | | | A number of files in drivers/spi fail checkincludes.pl due to the double include of <linux/spi/spi_bitbang.h>. The first include is needed to get the struct spi_bitbang definition and the spi_bitbang_* function prototypes. The second include happens after defining EXPAND_BITBANG_TXRX to get the inlined bitbang_txrx_* utility functions. The <linux/spi/spi_bitbang.h> header is also included by a number of other spi drivers, as well as some arch/ code, in order to use struct spi_bitbang and the associated functions. To fix the double include, and remove any potential confusion about it, move the inlined bitbang_txrx_* functions to a new private header in drivers/spi and also remove the need to define EXPAND_BITBANG_TXRX. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* spi: struct device - replace bus_id with dev_name(), dev_set_name()Kay Sievers2009-01-061-1/+1
| | | | | | Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* minor spi_butterfly cleanupDavid Brownell2007-05-081-58/+4
| | | | | | | | | | Simplify the spi_butterfly driver by removing incomplete/unused support for the second SPI bus, implemented by the USI controller. This should make this a clearer example of how to write a parport bitbang driver. 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>
* layered parport code uses parport->devDavid Brownell2007-05-081-17/+4
| | | | | | | | | | | | | | | | | | | Update some of the layered parport_driver code to use parport->dev: - i2c-parport (parent of i2c_adapter) - spi_butterfly (parent of spi_master, allowing cruft removal) - lp (creating class_device) - ppdev (parent of parportN device) - tipar (creating class_device) There are still drivers that should be updated, like some of the input drivers; but they won't be any worse off than they are today. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Greg KH <greg@kroah.com> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] spi: check platform_device_register_simple() errorAkinobu Mita2006-12-071-0/+2
| | | | | | | | | Check the return value of platform_device_register_simple(). Cc: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] severing fs.h, radix-tree.h -> sched.hAl Viro2006-12-041-0/+1
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Remove obsolete #include <linux/config.h>Jörn Engel2006-06-301-1/+0
| | | | | Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* [PATCH] S3C24XX: GPIO based SPI driverBen Dooks2006-05-211-0/+1
| | | | | | | | | | SPI driver for SPI by GPIO on the Samsung S3C24XX series of SoC processors. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Cc: Greg KH <greg@kroah.com> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] SPI: spi_butterfly, restore lost deltasDavid Brownell2006-02-061-19/+17
| | | | | | | | | | This resolves some minor version skew glitches that accumulated for the AVR Butterfly adapter driver, which caused among other things the existence of a duplicate Kconfig entry. Most of it boils down to comment updates, but in one case it removes some now-superfluous code that would be better if not copied into other controller-level drivers. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* [PATCH] SPI: add spi_butterfly driverDavid Brownell2006-01-131-0/+423
This adds a bitbanging parport based adaptor cable for AVR Butterfly, giving SPI links to its DataFlash chip and (eventually) firmware running in the card. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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