[PATCH v11 0/3] 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()
---
V7->V8 Changes : Minor commment updates in patch 4/5
---
V8->V9 Changes : Minor formatting changes in patch 5/5
---
V9->V10 Changes : Moving "return 0" at the end of dw_spi_dma_caps_init() from patch
[4/5] to patch [3/5] to solve :
spi-dw-dma.c: In function ‘dw_spi_dma_caps_init’:
spi-dw-dma.c:100:1: control reaches end of non-void function [-Werror=return-type]
---
V10->V11 : Resend patches [3/5] to [5/5] on top of :
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git
---

Joy Chakraborty (3):
  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 |  5 +++-
 drivers/spi/spi-dw-dma.c  | 56 ++++++++++++++++++++++++++++++++-------
 drivers/spi/spi-dw.h      |  1 +
 3 files changed, 51 insertions(+), 11 deletions(-)

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2.40.1.606.ga4b1b128d6-goog