mbox series

[0/7] dmaengine: pl330: Updates and new quirks for peripheral usecases

Message ID 20230504145737.286444-1-joychakr@google.com
Headers
Series dmaengine: pl330: Updates and new quirks for peripheral usecases |

Message

Joy Chakraborty May 4, 2023, 2:57 p.m. UTC 
  This patch series makes some initial minor and cosmetic changes:
    -Add variables and logic to handle separate source and destination
    AxSize and AxLen.
    -Use __ffs to calculate AxSize for consistency in the driver
    -Use switch-case in prep_slave_sg() for consistency
    -Change args get_burst_len() to remove redundant "len" and add
    burst_size so that it can be used in multiple places.

to majorly enable addition of 2 quirks in the last 2 patches:
    -Addition of a quirk to allow transactions towards memory to use the
    maximum possible bus width (AxSize) during a memory to peripheral
    dma usage or vise-versa.
    -Addition of a quirk which makes PL330 copy left over data after
    executing bursts to the peripheral in singles instead of bursts.
    -Update dt-bindings to represent the quirks
Quirks are explained further in the commit text.
---

Joy Chakraborty (7):
  dmaengine: pl330: Separate SRC and DST burst size and len
  dmaengine: pl330: Use FFS to calculate burst size
  dmaengine: pl330: Change if-else to switch-case for consistency
  dmaengine: pl330: Change unused arg "len" from get_burst_len()
  dmaengine: pl330: Quirk to optimize AxSize for peripheral usecases
  dmaengine: pl330: Quirk to use DMA singles for peripheral _dregs
  dt-bindings: dmaengine: pl330: Add new quirks

 .../devicetree/bindings/dma/arm,pl330.yaml    |   8 +
 drivers/dma/pl330.c                           | 245 +++++++++++++++---
 2 files changed, 213 insertions(+), 40 deletions(-)