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[0/4] Add SMI clamp and reset

Message ID 20240821082845.11792-1-friday.yang@mediatek.com (mailing list archive)
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Series Add SMI clamp and reset | expand

Message

Friday Yang (杨阳) Aug. 21, 2024, 8:26 a.m. UTC 
Based on tag: next-20240821, linux-next/master

Refer to the discussion in the following link:
https://lore.kernel.org/all/CAFGrd9qZhObQXvm2_abqaX83xMLqxjQETB2=wXpobDWU1CnvkA@mail.gmail.com/
https://lore.kernel.org/all/CAPDyKFpokXV2gJDgowbixTvOH_5VL3B5H8eyhP+KJ5Fasm2rFg@mail.gmail.com/
SMI clamp and reset operations should be implemented in SMI driver
instead of PM driver.

When we enable/disable power domain, the SMI LARBs linked to this power
domain could be affected by the bus glitch. To avoid this issue, SMI
need to apply clamp and reset opereations.

These patches mainly add these functions:
1) Register genpd callback for SMI LARBs and handle this power domain
   status change into SMI driver.
2) Add SMI reset control driver to implement SMI reset opereations.
3) Add bindings for describing the reset control regmap and SMI Sub Common.

friday.yang (4):
  dt-bindings: memory: mediatek: Add mt8188 SMI reset control binding
  dt-bindings: memory: mediatek: Add smi-sub-common property for reset
  memory: mtk-smi: mt8188: Add SMI clamp function
  reset: mediatek: Add reset control driver for SMI

 .../mediatek,smi-common.yaml                  |   2 +
 .../memory-controllers/mediatek,smi-larb.yaml |  22 +++
 .../bindings/reset/mediatek,smi-reset.yaml    |  46 ++++++
 drivers/memory/mtk-smi.c                      | 148 ++++++++++++++++-
 drivers/reset/Kconfig                         |   9 ++
 drivers/reset/Makefile                        |   1 +
 drivers/reset/reset-mediatek-smi.c            | 152 ++++++++++++++++++
 include/dt-bindings/reset/mt8188-resets.h     |  11 ++
 8 files changed, 389 insertions(+), 2 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/reset/mediatek,smi-reset.yaml
 create mode 100644 drivers/reset/reset-mediatek-smi.c

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2.46.0