Add the driver and dt-binding document for Loongson1 APB DMA. Changes in v12: - Delete superfluous blank lines in the examples section. - Move the call to devm_request_irq() into ls1x_dma_alloc_chan_resources() to use dma_chan_name() as a parameter. - Move the call to devm_free_irq() into ls1x_dma_free_chan_resources() accordingly. - Rename ls1x_dma_alloc_llis() to ls1x_dma_prep_lli(). - Merge ls1x_dma_free_lli() into ls1x_dma_free_desc(). - Add ls1x_dma_synchronize(). - Fix the error handling of ls1x_dma_probe(). - Some minor fixes and improvements. - Link to v11: https://lore.kernel.org/r/20240802-loongson1-dma-v11-0-85392357d4e0@xxxxxxxxx Changes in v11: - Use guard notation to acquire the spinlock. - Fix the build error of LS1X_DMA_LLI_ALIGNMENT. - Some minor fixes. - Link to v10: https://lore.kernel.org/r/20240726-loongson1-dma-v10-0-31bf095a6fa6@xxxxxxxxx Changes in v10: - Implement the hwdescs by link list to eliminate the limitation of the desc number. - Add the prefix 'LS1X_' for all registers and their bits. - Drop the macros: chan_readl() and chan_writel(). - Use %pad for printing a dma_addr_t type. - Some minor fixes. - Link to v9: https://lore.kernel.org/r/20240613-loongson1-dma-v9-0-6181f2c7dece@xxxxxxxxx Changes in v9: - Fix all the errors and warnings when building with W=1 and C=1 - Link to v8: https://lore.kernel.org/r/20240607-loongson1-dma-v8-0-f9992d257250@xxxxxxxxx Changes in v8: - Change 'interrupts' property to an items list - Link to v7: https://lore.kernel.org/r/20240329-loongson1-dma-v7-0-37db58608de5@xxxxxxxxx Changes in v7: - Change the comptible to 'loongson,ls1*-apbdma' (suggested by Huacai Chen) - Update the title and description part accordingly - Rename the file to loongson,ls1b-apbdma.yaml - Add a compatible string for LS1A - Delete minItems of 'interrupts' - Change patterns of 'interrupt-names' to const - Rename the file to loongson1-apb-dma.c to keep the consistency - Update Kconfig and Makefile accordingly - Link to v6: https://lore.kernel.org/r/20240316-loongson1-dma-v6-0-90de2c3cc928@xxxxxxxxx Changes in v6: - Change the compatible to the fallback - Implement .device_prep_dma_cyclic for Loongson1 sound driver, as well as .device_pause and .device_resume. - Set the limitation LS1X_DMA_MAX_DESC and put all descriptors into one page to save memory - Move dma_pool_zalloc() into ls1x_dma_alloc_desc() - Drop dma_slave_config structure - Use .remove_new instead of .remove - Use KBUILD_MODNAME for the driver name - Improve the debug information - Some minor fixes Changes in v5: - Add the dt-binding document - Add DT support - Use DT information instead of platform data - Use chan_id of struct dma_chan instead of own id - Use of_dma_xlate_by_chan_id() instead of ls1x_dma_filter() - Update the author information to my official name Changes in v4: - Use dma_slave_map to find the proper channel. - Explicitly call devm_request_irq() and tasklet_kill(). - Fix namespace issue. - Some minor fixes and cleanups. Changes in v3: - Rename ls1x_dma_filter_fn to ls1x_dma_filter. Changes in v2: - Change the config from 'DMA_LOONGSON1' to 'LOONGSON1_DMA', - and rearrange it in alphabetical order in Kconfig and Makefile. - Fix comment style. --- Keguang Zhang (2): dt-bindings: dma: Add Loongson-1 APB DMA dmaengine: Loongson1: Add Loongson-1 APB DMA driver .../bindings/dma/loongson,ls1b-apbdma.yaml | 65 ++ drivers/dma/Kconfig | 9 + drivers/dma/Makefile | 1 + drivers/dma/loongson1-apb-dma.c | 660 +++++++++++++++++++++ 4 files changed, 735 insertions(+) --- base-commit: 61c01d2e181adfba02fe09764f9fca1de2be0dbe change-id: 20231120-loongson1-dma-163afe5708b9 Best regards, -- Keguang Zhang <keguang.zhang@xxxxxxxxx>
