[v3,0/2] Add an interface to get current DDR data rate

Message

Crystal Guo (郭晶) March 26, 2025, 6:30 a.m. UTC

This series is based on linux-next, tag: next-20250324.

Vcore DVFS feature need know the current DDR data rate.
Add MediaTek DRAMC driver to provide an interface that can
obtain current DDR data rate.

---
Changes in v3:
- Move register offset, register mask and other SoC-dependent variables
  to the platform data;
- Correct the spelling error.

---
Changes in v2:
- Remove pr_info and pr_err, use dev_err or dev_err_probe to print
  error message;
- Replace module_init by module_platform_driver;
- Remove unnecessary global variables;
- Change fmeter-verison to platform data;
- Remove mtk-dramc.h;
- Refine compatible to "mediatek,mt8196-dramc";
- Refine CONFIG name to MEDIATEK_MC;
- Fix yaml build errors, remove unnecessary properties on yaml file.

Link to v2:
https://patchwork.kernel.org/patch/13964208

Crystal Guo (2):
  dt-bindings: memory-controllers: Add MediaTek DRAM controller
    interface
  memory/mediatek: Add an interface to get current DDR data rate

 .../memory-controllers/mediatek,dramc.yaml    |  44 ++++
 drivers/memory/Kconfig                        |   1 +
 drivers/memory/Makefile                       |   1 +
 drivers/memory/mediatek/Kconfig               |  21 ++
 drivers/memory/mediatek/Makefile              |   2 +
 drivers/memory/mediatek/mtk-dramc.c           | 232 ++++++++++++++++++
 6 files changed, 301 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/memory-controllers/mediatek,dramc.yaml
 create mode 100644 drivers/memory/mediatek/Kconfig
 create mode 100644 drivers/memory/mediatek/Makefile
 create mode 100644 drivers/memory/mediatek/mtk-dramc.c