[v2,SPI,for-next,0/3] DMA Support for SPI in PCI1xxxx

Message

Thangaraj Samynathan Feb. 6, 2024, 3:41 a.m. UTC

This series of patch is to add DMA Support that improves SPI Performance
in PCI1xxxx. With DMA Support in 20MHz clock, the performance is
improved from 6Mbps to 17Mbps.

v2:
-Added can_dma operation, so that the core can do all DMA mapping and
switch between DMA and PIO operation by itself.
-Added error messages for syslock acquire failure and DMA mask set
failures.

v1:
-Initial Submission


Thangaraj Samynathan (3):
  spi: mchp-pci1xxxx: Add support for DMA in SPI
  spi: mchp-pci1xxxx: DMA Read support for copying data into SPI Buf
  spi: mchp-pci1xxxx: DMA Write Support for copying data from SPI Buf

 drivers/spi/spi-pci1xxxx.c | 510 +++++++++++++++++++++++++++++++++++--
 1 file changed, 483 insertions(+), 27 deletions(-)