mbox series

[v5,0/2] Add `devm_dma_request_chan()` to simplify probe path in atmel-quadspi.c

Message ID 20250505184936.312274-1-csokas.bence@prolan.hu
Headers show
Series Add `devm_dma_request_chan()` to simplify probe path in atmel-quadspi.c | expand

Message

Bence Csókás May 5, 2025, 6:49 p.m. UTC 
The probe function of the atmel-quadspi driver got quite convoluted,
especially since the addition of SAMA7G5 support, that was forward-ported
from an older vendor kernel. To alleivate this - and similar problems in
the future - an effort was made to migrate as many functions as possible,
to their devm_ managed counterparts. Patch 1/2 adds the new
`devm_dma_request_chan()` function. Patch 2/2 then uses this APIs to
simplify the probe() function.

Change in v4:
* split PM imbalance fix [1] and DMA cleanup [this series]

Patch 2/2 is to be applied after the PM imbalance fix [1]. Patch 1/2 can
(and should) be applied immediately, to a for-6.16 branch.

[1]
https://lore.kernel.org/lkml/20250327195928.680771-2-csokas.bence@prolan.hu/

Links to previous versions:
pre-series:
https://lore.kernel.org/linux-kernel/20241222141427.819222-1-csokas.bence@prolan.hu/
https://lore.kernel.org/linux-kernel/20250114222851.1023194-1-csokas.bence@prolan.hu/
v1:
https://lore.kernel.org/linux-kernel/20250115160244.1102881-1-csokas.bence@prolan.hu/
v2:
https://lore.kernel.org/linux-kernel/20250124085221.766303-8-csokas.bence@prolan.hu/
v3:
https://lore.kernel.org/linux-kernel/20250207124802.165408-1-csokas.bence@prolan.hu/
v4:
https://lore.kernel.org/lkml/20250317135340.382532-1-csokas.bence@prolan.hu/

Bence Csókás (2):
  dma: Add devm_dma_request_chan()
  spi: atmel-quadspi: Use `devm_dma_request_chan()`

 drivers/dma/dmaengine.c     | 30 +++++++++++++++++++++++++
 drivers/spi/atmel-quadspi.c | 44 ++++++++++---------------------------
 include/linux/dmaengine.h   |  7 ++++++
 3 files changed, 48 insertions(+), 33 deletions(-)


base-commit: 70cb3b9a371fe9ff4f50cd7889763abd4ab621dc
base-tree: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
prerequisite-patch-id: e698614397eaaf4da550babe05eea26b7ebbfe39