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[v3,0/4] LoongArch: Introduce the Loongson-2K MMC host controller driver

Message ID cover.1750216134.git.zhoubinbin@loongson.cn
Headers show
Series LoongArch: Introduce the Loongson-2K MMC host controller driver | expand

Message

Binbin Zhou June 18, 2025, 8:07 a.m. UTC 
Hi all:

This patchset introduce the MMC host controller on Loongson-2K series
CPUs.

They are similar, except for the interface characteristics and the use of
DMA engine, specifically, the Loongson-2K0500/Loongson-2K1000 use an
externally shared APBDMA engine, while the Loongson-2K2000 uses an
internally exclusive DMA.

Based on this, I'm splitting the driver into two patches.

List of the patchset:
Patch1: bindings for Loongson-2K0500/Loongson-2K1000;
Patch2: driver for MMC controller using externally shared APBDMA engine;
Patch3: bindings for Loongson-2K2000;
Patch4: driver for MMC controller using internally exclusive DMA.

Thanks.

-------
V3:
- Rebase on linux-mmc/next branch.
patch(1/4):
 - Rename dt-binding file as loongson,ls2k0500-mmc.yaml.
patch(2/4):
 - Fix lkp error;
    https://lore.kernel.org/all/202505081845.0NQYX2nS-lkp@intel.com/
    https://lore.kernel.org/all/202505130918.uanOGxju-lkp@intel.com/
 - Add regulators support for ios ops;
 - Add ack_sdio_irq() callback;
 - Add MMC_CAP2_SDIO_IRQ_NOTHREAD flag;
patch(3/4):
 - Add Ack-by tag.
patch(4/4):
 - Update commit for fix_data_timeout().

Link to V2:
https://lore.kernel.org/all/cover.1746581751.git.zhoubinbin@loongson.cn/

V2:
patch(1/4):
 - Add reg define for each reg entry.

patch(2/4):
 - Put all code in the c-file;
 - Use mmc_from_priv() instead of host->mmc;
 - Use sdio_signal_irq() instead of mmc_signal_sdio_irq();
 - Use devm_mmc_alloc_host() instead of mmc_alloc_host();
 - Use mmc_regulator_get_supply();

patch(4/4):
 - Add fix_cmd_interrupt function which is needed by Loongson-2K2000.

Link to V1:
https://lore.kernel.org/linux-mmc/cover.1744273956.git.zhoubinbin@loongson.cn/

Binbin Zhou (4):
  dt-bindings: mmc: Add Loongson-2K SD/SDIO/eMMC controller binding
  mmc: loongson2: Add Loongson-2K SD/SDIO controller driver
  dt-bindings: mmc: loongson,ls2k0500-mmc: Add compatible for
    Loongson-2K2000
  mmc: loongson2: Add Loongson-2K2000 SD/SDIO/eMMC controller driver

 .../bindings/mmc/loongson,ls2k0500-mmc.yaml   |  112 ++
 MAINTAINERS                                   |    7 +
 drivers/mmc/host/Kconfig                      |   13 +
 drivers/mmc/host/Makefile                     |    1 +
 drivers/mmc/host/loongson2-mmc.c              | 1032 +++++++++++++++++
 5 files changed, 1165 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mmc/loongson,ls2k0500-mmc.yaml
 create mode 100644 drivers/mmc/host/loongson2-mmc.c


base-commit: 187715cfd12932a528ff3a3952648e2b55381d4c