linux-kernel - [PATCH v4 0/3] Fix STM32 I2C dma operations

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Message-ID: <20250704-i2c-upstream-v4-0-84a095a2c728@foss.st.com>
Date: Fri, 4 Jul 2025 10:39:13 +0200
From: Clément Le Goffic <clement.legoffic@...s.st.com>
To: Pierre-Yves MORDRET <pierre-yves.mordret@...s.st.com>,
        Alain Volmat
	<alain.volmat@...s.st.com>,
        Andi Shyti <andi.shyti@...nel.org>,
        "Maxime
 Coquelin" <mcoquelin.stm32@...il.com>,
        Alexandre Torgue
	<alexandre.torgue@...s.st.com>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Christian König <christian.koenig@....com>,
        "M'boumba Cedric
 Madianga" <cedric.madianga@...il.com>,
        Wolfram Sang <wsa@...nel.org>
CC: Pierre-Yves MORDRET <pierre-yves.mordret@...com>,
        <linux-i2c@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <linux-media@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <linaro-mm-sig@...ts.linaro.org>,
        Clément Le Goffic
	<clement.legoffic@...s.st.com>
Subject: [PATCH v4 0/3] Fix STM32 I2C dma operations

This patch series aims to fix some issues inside the driver's DMA
handling.
It also uses newer I2C DMA API.

Signed-off-by: Clément Le Goffic <clement.legoffic@...s.st.com>
---
Changes in v4:
- Patch[1]: Remove all `chan_dev` variable occurrencies
- Patch[2]:
    - Refine commit message
    - Use the dma_callback to factorize the code
- Patch[3]: Refine commit message
- Link to v3: https://lore.kernel.org/r/20250630-i2c-upstream-v3-0-7a23ab26683a@foss.st.com

Changes in v3:
- Add Alain Volmat's "Acked-by" on patch 1 and 2
- Link to v2: https://lore.kernel.org/r/20250627-i2c-upstream-v2-0-8c14523481dc@foss.st.com

Changes in v2:
- Fix the dev used in dma_unmap also in the error path of
  `stm32_i2c_prep_dma_xfer`
- Add a dma_unmap_single also in the ITs error handler
- Add Alain Volmat's "Acked-by" on patch 3
- Link to v1: https://lore.kernel.org/r/20250616-i2c-upstream-v1-0-42d3d5374e65@foss.st.com

---
Clément Le Goffic (3):
      i2c: stm32: fix the device used for the DMA map
      i2c: stm32f7: unmap DMA mapped buffer
      i2c: stm32f7: support i2c_*_dma_safe_msg_buf APIs

 drivers/i2c/busses/i2c-stm32.c   |  8 +++---
 drivers/i2c/busses/i2c-stm32f7.c | 56 +++++++++++++++++++++-------------------
 2 files changed, 33 insertions(+), 31 deletions(-)
---
base-commit: d0b3b7b22dfa1f4b515fd3a295b3fd958f9e81af
change-id: 20250527-i2c-upstream-e5b69501359a

Best regards,
--  
Clément Le Goffic <clement.legoffic@...s.st.com>