linux-kernel - [PATCH v2 0/5] dma: fsl/mcf-edma: Bug fixes and enhancements for ColdFire support

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Message-Id: <20251126-dma-coldfire-v2-0-5b1e4544d609@yoseli.org>
Date: Wed, 26 Nov 2025 09:36:01 +0100
From: Jean-Michel Hautbois via B4 Relay <devnull+jeanmichel.hautbois.yoseli.org@...nel.org>
To: Frank Li <Frank.Li@....com>, Vinod Koul <vkoul@...nel.org>, 
 Angelo Dureghello <angelo@...am.it>
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 v2 0/5] 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 the FSL_EDMA_DRV_MCF flag to fix byte-lane addressing for
MCF54418.

Patch 2 adds per-channel IRQ naming for easier debugging.

Patches 3-5 fix the interrupt and error handlers for all 64 DMA
channels:
- Patch 3 fixes the interrupt handler to process all 64 channels
- Patch 4 moves the error handler out of the header file for clarity
- Patch 5 fixes the error handler for all 64 channels with proper types

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

Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@...eli.org>
---
Changes in v2:
- Check devm_kasprintf() return value
- Keep request_irq on one line in naming patch
- Remove non needed memory barrier
- Remove the interleave patch for now
- Link to v1: https://lore.kernel.org/r/20251124-dma-coldfire-v1-0-dc8f93185464@yoseli.org

---
Jean-Michel Hautbois (5):
      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

 drivers/dma/fsl-edma-common.c |  5 +++
 drivers/dma/fsl-edma-common.h | 11 +++----
 drivers/dma/mcf-edma-main.c   | 72 +++++++++++++++++++++++++------------------
 3 files changed, 52 insertions(+), 36 deletions(-)
---
base-commit: ac3fd01e4c1efce8f2c054cdeb2ddd2fc0fb150d
change-id: 20251123-dma-coldfire-5f36aee143b3

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