linux-kernel - [PATCH 0/7] dma: fsl/mcf-edma: Bug fixes and enhancements for ColdFire support

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Message-Id: <20251124-dma-coldfire-v1-0-dc8f93185464@yoseli.org>
Date: Mon, 24 Nov 2025 13:50:21 +0100
From: Jean-Michel Hautbois <jeanmichel.hautbois@...eli.org>
To: Frank Li <Frank.Li@....com>, Vinod Koul <vkoul@...nel.org>
Cc: Greg Ungerer <gerg@...ux-m68k.org>, imx@...ts.linux.dev, 
 dmaengine@...r.kernel.org, linux-m68k@...ts.linux-m68k.org, 
 linux-kernel@...r.kernel.org, 
 Jean-Michel Hautbois <jeanmichel.hautbois@...eli.org>
Subject: [PATCH 0/7] dma: fsl/mcf-edma: Bug fixes and enhancements for
 ColdFire support

This series addresses several bugs in the fsl-edma and mcf-edma drivers
affecting MCF54418 ColdFire processors.

Patch 1 adds a write barrier after TCD descriptor fill to ensure proper
memory ordering.

Patch 2 adds the FSL_EDMA_DRV_MCF flag to fix byte-lane addressing for
MCF54418.

Patch 3 adds per-channel IRQ naming for easier debugging.

Patches 4-6 fix the interrupt and error handlers for all 64 DMA
channels:
- Patch 4 fixes the interrupt handler to process all 64 channels
- Patch 5 moves the error handler out of the header file for clarity
- Patch 6 fixes the error handler for all 64 channels with proper types

Patch 7 adds source stride support for interleaved DMA transfers,
enabling memory access patterns where source samples are not contiguous.

Tested on a custom MCF54418-based platform with slave DMA transfers.

Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@...eli.org>
---
Jean-Michel Hautbois (7):
      dma: fsl-edma: Add write barrier after TCD descriptor fill
      dma: fsl-edma: Add FSL_EDMA_DRV_MCF flag for ColdFire eDMA
      dma: mcf-edma: Add per-channel IRQ naming for debugging
      dma: mcf-edma: Fix interrupt handler for 64 DMA channels
      dma: fsl-edma: Move error handler out of header file
      dma: mcf-edma: Fix error handler for all 64 DMA channels
      dma: fsl-edma: Support source stride for interleaved DMA transfers

 drivers/dma/fsl-edma-common.c | 14 +++++++++
 drivers/dma/fsl-edma-common.h | 11 ++++----
 drivers/dma/mcf-edma-main.c   | 66 +++++++++++++++++++++++++------------------
 3 files changed, 57 insertions(+), 34 deletions(-)
---
base-commit: d13f3ac64efb868d09cb2726b1e84929afe90235
change-id: 20251123-dma-coldfire-5f36aee143b3

Best regards,
-- 
Jean-Michel Hautbois <jeanmichel.hautbois@...eli.org>