linux-kernel - [PATCH v2 0/2] dmaengine: dw-axi-dmac: PM cleanup and reset control support

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Message-ID: <20251013150234.3200627-1-a.shimko.dev@gmail.com>
Date: Mon, 13 Oct 2025 18:02:31 +0300
From: Artem Shimko <a.shimko.dev@...il.com>
To: Vinod Koul <vkoul@...nel.org>,
	Philipp Zabel <p.zabel@...gutronix.de>
Cc: Artem Shimko <a.shimko.dev@...il.com>,
	linux-kernel@...r.kernel.org,
	dmaengine@...r.kernel.org,
	Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>
Subject: [PATCH v2 0/2] dmaengine: dw-axi-dmac: PM cleanup and reset control support

This patch series improves the dw-axi-dmac driver in two areas:

Patch 1 simplifies the power management code by using modern kernel
macros and removing redundant wrapper functions, making the code more
maintainable and aligned with current kernel practices.

Patch 2 adds proper reset control support to ensure reliable
initialization and power management, handling resets during probe,
remove, and suspend/resume operations.

ChangeLog:
  v1:
    * https://lore.kernel.org/all/20251012100002.2959213-1-a.shimko.dev@gmail.com/T/#t
  v2:
    * Remove has_resets flag and use reset_control_assert/deassert() unconditionally,
    as these functions handle NULL pointers internally
    * Replace devm_reset_control_array_get_exclusive() with
    devm_reset_control_array_get_optional_exclusive() to handle platforms
    without reset controls gracefully
    * Simplify error handling by removing redundant flag checks
    * Remove has_resets field from struct axi_dma_chip as it's no longer needed

Artem Shimko (2):
  dmaengine: dw-axi-dmac: simplify PM functions and use modern macros
  dmaengine: dw-axi-dmac: add reset control support

 .../dma/dw-axi-dmac/dw-axi-dmac-platform.c    | 66 ++++++++-----------
 drivers/dma/dw-axi-dmac/dw-axi-dmac.h         |  1 +
 2 files changed, 30 insertions(+), 37 deletions(-)

-- 
2.43.0