[PATCH v8 0/5] spi: dw: DW SPI DMA Driver updates

[Joy Chakraborty <joychakr@google.com>]

This Patch series adds support for 32 bits per word trasfers using DMA
and some defensive checks around dma controller capabilities.
---
V1 Changes : Add support for AxSize=4 bytes to support 32bits/word.
---
V1->V2 Changes : Add dma capability check to make sure address widths
are supported.
---
V2->V3 Changes : Split changes , add DMA direction check and other
cosmetic chnages.
---
V3->V4 Changes : Fix Sparce Warning
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303270715.w9sMJhIh-lkp@intel.com/
---
V4->V5 Changes : Preserve reverse xmas Tree order, move direction
check before initalisation of further capabilities, remove zero
initialisations, remove error OR'ing.
---
V5->V6 Changes :
	-Remove case of n_bytes=3 using 4_bytes buswidth
	-Avoid forward decaration
	-Break capability check patch into 2
	-round n_bytes to power of 2 ( Bug Fix)
	-Add more explanation in commit text.
---
V6->V7 Changes : Remove extra spaces, refer to functions in commit as
func()
---

Joy Chakraborty (5):
  spi: dw: Add 32 bpw support to SPI DW DMA driver
  spi: dw: Move dw_spi_can_dma()
  spi: dw: Add DMA directional capability check
  spi: dw: Add DMA address widths capability check
  spi: dw: Round of n_bytes to power of 2

 drivers/spi/spi-dw-core.c |  2 +-
 drivers/spi/spi-dw-dma.c  | 76 +++++++++++++++++++++++++++++----------
 drivers/spi/spi-dw.h      |  1 +
 3 files changed, 60 insertions(+), 19 deletions(-)

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2.40.0.634.g4ca3ef3211-goog