fix(stm32): Optimize SDMMC timeout handling and clock divider

[wdfk-prog]

为什么提交这份PR (why to submit this PR)

STM32 SDMMC driver still has several issues in data transfer and clock configuration:

1. Data transfer completion waits by loop count, which is not robust for different transfer sizes and clock settings, and may lead to timeout or unstable behavior.
2. Cache maintenance uses global clean/invalidate operations, which is inefficient and may introduce unnecessary overhead.
3. Clock divider handling is not clear enough in different timing modes, and the initialization / normal-speed / high-speed switching logic needs improvement.
4. Some error logs are malformed and do not provide valid diagnostic information.
5. The default clock getter is not assigned when clk_get is not provided.

This PR improves the SDMMC driver behavior and makes the logic more robust and maintainable.

你的解决方案是什么 (what is your solution)

This PR mainly includes the following changes:

1. Add a default SDMMC clock getter (stm32_sdio_clk_get) and use it when board-specific clk_get is not provided.
2. Replace the fixed loop-based data transfer wait with a tick-based timeout calculation (stm32_sdmmc_calc_timeout) based on transfer size, improving timeout robustness.
3. Replace global D-Cache clean/invalidate operations with range-based cache operations to improve execution efficiency.
4. Refine SDMMC power-mode handling in rthw_sdio_iocfg() and avoid unnecessary reconfiguration when the controller should remain stopped.
5. Optimize clock divider selection logic for initialization, legacy mode, normal speed, and high speed timing.
6. Remove redundant checks and unused global object definitions.
7. Fix malformed log messages and improve code readability.
8. Update related header definitions so frequency-related macros are more consistent.

请提供验证的bsp和config (provide the config and bsp)

• BSP:

  • bsp/stm32/[please fill in your verified board path]

• .config:

  • CONFIG_BSP_USING_SDIO
  • CONFIG_RT_USING_SDIO
  • [please fill in other changed configs if applicable]

• action:

  • [please provide your fork action link]

[github-actions]

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[github-actions]

📌 Code Review Assignment

🏷️ Tag: bsp_stm32

Reviewers: @Liang1795 @hamburger-os @wdfk-prog

Changed Files (Click to expand)

• bsp/stm32/libraries/HAL_Drivers/drivers/drv_sdmmc.c
• bsp/stm32/libraries/HAL_Drivers/drivers/drv_sdmmc.h

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📊 Current Review Status (Last Updated: 2026-03-14 10:34 CST)

• ⌛ @Liang1795 Pending Review
• ⌛ @hamburger-os Pending Review
• ⌛ @wdfk-prog Pending Review

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[wdfk-prog]

• [stm32][sdmmc]Optimize execution efficiency and find the right clock division #9276