This series introduces improvements and helper functions for channel
and driver management.
It enables proper unloading of the stm32_dma3 module, replacing the
previous subsys_initcall() mechanism with module_plaform_driver().
It introduces helper functions to take and release the channel semaphore,
and restores the semaphore state on resume, considering the possible
reset of CxSEMCR register during suspend.
It also adds a helper to retrieve the device pointer from the dma_device
structure contained in stm32_dma3_ddata, simplifying the code.
Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
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Changes in v2:
- Refine PATCH 4/4 commit description and remove unintended blank line
- Collect Reviewed-by tag
- Link to v1: https://lore.kernel.org/r/20251103-dma3_improv-v1-0-57f048bf2877@foss.st.com
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Amelie Delaunay (4):
dmaengine: stm32-dma3: use module_platform_driver
dmaengine: stm32-dma3: introduce channel semaphore helpers
dmaengine: stm32-dma3: restore channel semaphore status after suspend
dmaengine: stm32-dma3: introduce ddata2dev helper
drivers/dma/stm32/stm32-dma3.c | 165 +++++++++++++++++++++++++++++++++--------
1 file changed, 136 insertions(+), 29 deletions(-)
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base-commit: 398035178503bf662281bbffb4bebce1460a4bc5
change-id: 20251103-dma3_improv-b4b36ee231e4
Best regards,
--
Amelie Delaunay <amelie.delaunay@foss.st.com>