Commit Graph

12 Commits

Author SHA1 Message Date
Lorenzo Bianconi
304d34360b
spi: add flags parameter to txrx_word function pointers
Add the capability to specify the flag parameter used in
bitbang_txrx_be_cpha{0,1} through the txrx_word function pointers of
spi_bitbang data structure. That feature will be used to add spi-3wire
support to the spi-gpio controller

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-08-01 14:50:24 +01:00
Sudip Mukherjee
1d3029cc5f spi: butterfly: use new parport device model
Modify spi-butterfly driver to use the new parallel port device model.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-02 19:38:16 +00:00
Sudip Mukherjee
e71fec7352 spi: butterfly: correct alignment
checkpatch complains about the allignment with open parenthesis.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-02 19:38:16 +00:00
Sudip Mukherjee
b12fe7250c spi: butterfly: remove cast to void
checkpatch was complaining about space after cast. But the cast to void
is not required at that place.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-02 19:38:16 +00:00
Sudip Mukherjee
1bfa91e925 spi: butterfly: remove multiple blank lines
checkpatch complains about multiple blank lines.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-12-02 19:38:16 +00:00
Jarkko Nikula
2c658e212c spi: Remove FSF mailing addresses
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-22 15:32:42 +00:00
Axel Lin
d9721ae149 spi: bitbang: Make spi_bitbang_stop() return void
spi_bitbang_stop() never fails, so make it return void.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-29 11:09:26 +00:00
Mark Brown
1e8081da4d Merge remote-tracking branch 'spi/topic/butterfly' into spi-next 2013-10-25 09:51:23 +01:00
Jingoo Han
ac8ed236a9 spi: butterfly: Fix checkpatch issue
Fix the following checkpatch errors and warnings.

  ERROR: space required before the open brace '{'
  ERROR: space required after that close brace '}'
  ERROR: space required before the open parenthesis '('
  ERROR: do not use C99 // comments
  WARNING: sizeof *pp should be sizeof(*pp)

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2013-10-15 13:04:24 +01:00
Axel Lin
94c69f765f spi: bitbang: Let spi_bitbang_start() take a reference to master
Many drivers that use bitbang library have a leak on probe error paths.
This is because once a spi_master_get() call succeeds, we need an additional
spi_master_put() call to free the memory.

Fix this issue by moving the code taking a reference to master to
spi_bitbang_start(), so spi_bitbang_start() will take a reference to master on
success. With this change, the caller is responsible for calling
spi_bitbang_stop() to decrement the reference and spi_master_put() as
counterpart of spi_alloc_master() to prevent a memory leak.

So now we have below patten for drivers using bitbang library:

probe:
spi_alloc_master        -> Init reference count to 1
spi_bitbang_start       -> Increment reference count
remove:
spi_bitbang_stop        -> Decrement reference count
spi_master_put          -> Decrement reference count (reference count reaches 0)

Fixup all users accordingly.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Suggested-by: Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
Acked-by: Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-17 12:56:14 +01:00
Paul Gortmaker
d7614de422 spi: Add module.h to implicit users in drivers/spi
We are clipping down the presence of module.h, since it was
everywhere.  If you really need it, you better call it out,
as per this changeset.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-10-31 19:32:17 -04:00
Grant Likely
ca632f5566 spi: reorganize drivers
Sort the SPI makefile and enforce the naming convention spi_*.c for
spi drivers.

This change also rolls the contents of atmel_spi.h into the .c file
since there is only one user of that particular include file.

v2: - Use 'spi-' prefix instead of 'spi_' to match what seems to be
      be the predominant pattern for subsystem prefixes.
    - Clean up filenames in Kconfig and header comment blocks

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
2011-06-06 01:16:30 -06:00