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

Clément Le Goffic
2025-07-04T08:42:02Z

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@foss.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@foss.st.com>