linux-kernel - [PATCH v12 0/2] Add support for Loongson1 APB DMA

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Message-Id: <20240809-loongson1-dma-v12-0-d9469a4a6b85@gmail.com>
Date: Fri, 09 Aug 2024 18:30:57 +0800
From: Keguang Zhang via B4 Relay <devnull+keguang.zhang.gmail.com@...nel.org>
To: Keguang Zhang <keguang.zhang@...il.com>, Vinod Koul <vkoul@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-mips@...r.kernel.org, dmaengine@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Conor Dooley <conor.dooley@...rochip.com>, 
 Jiaxun Yang <jiaxun.yang@...goat.com>
Subject: [PATCH v12 0/2] Add support for Loongson1 APB DMA

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@gmail.com

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@gmail.com

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@gmail.com

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@gmail.com

Changes in v8:
- Change 'interrupts' property to an items list
- Link to v7: https://lore.kernel.org/r/20240329-loongson1-dma-v7-0-37db58608de5@gmail.com

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@gmail.com

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@...il.com>