[PATCH v3 00/17] spi: s3c64xx: straightforward cleanup

[Tudor Ambarus]

Straightforward patches that clean the driver. Just compiled tested.

Stands up just the patch that updates the driver to use the bitfield
access macros. The bit operations shall be identical after the patch.
Sam and Andi have some concerns on whether using the bitfield access
macros are just a matter of taste, or they are actually necessary.
I think they are necessary. Here are the concerns/discussions:
https://lore.kernel.org/linux-arm-kernel/ee4107c3-1141-45ab-874c-03474d8ec18d@xxxxxxxxxx/
https://lore.kernel.org/linux-arm-kernel/ri7gerw4ov4jnmmkhtumhhtgfgxtr6kpsopdxjlx6fylbqznna@3qgvejyhjirw/

Cheers,
ta

v3:
- reworked the bitfied access macros patch so that the bit operations
  are the same as before the patch. Fix S3C64XX_SPI_PSR_MASK value,
  drop S3C64XX_SPI_CS_NSC_CNT_MASK.
- add a new patches to explicitly remove a duplicated definition and to
  drop a superfluous bitwise NOT operation.
- collect R-b tags

v2:
https://lore.kernel.org/linux-arm-kernel/36a664b1-666d-4fc4-90d9-35b42e56973d@xxxxxxxxxx/

Tudor Ambarus (17):
  spi: s3c64xx: explicitly include <linux/io.h>
  spi: s3c64xx: explicitly include <linux/bits.h>
  spi: s3c64xx: avoid possible negative array index
  spi: s3c64xx: fix typo, s/configuartion/configuration
  spi: s3c64xx: sort headers alphabetically
  spi: s3c64xx: remove unneeded (void *) casts in of_match_table
  spi: s3c64xx: remove else after return
  spi: s3c64xx: move common code outside if else
  spi: s3c64xx: check return code of dmaengine_slave_config()
  spi: s3c64xx: propagate the dma_submit_error() error code
  spi: s3c64xx: rename prepare_dma() to s3c64xx_prepare_dma()
  spi: s3c64xx: return ETIMEDOUT for wait_for_completion_timeout()
  spi: s3c64xx: drop blank line between declarations
  spi: s3c64xx: downgrade dev_warn to dev_dbg for optional dt props
  spi: s3c64xx: remove duplicated definition
  spi: s3c64xx: drop a superfluous bitwise NOT operation
  spi: s3c64xx: use bitfield access macros

 drivers/spi/spi-s3c64xx.c | 298 ++++++++++++++++++++------------------
 1 file changed, 158 insertions(+), 140 deletions(-)

-- 
2.43.0.429.g432eaa2c6b-goog