[bsp/renesas][drivers] Fix SPI configuration faults

[CYFS3]

拉取/合并请求描述：(PR description)

[

为什么提交这份PR (why to submit this PR)

Renesas SPI 和 SCI SPI 驱动在配置软件片选时没有检查 RT_SPI_NO_CS 和 PIN_NONE。无片选设备通过 rt_spi_bus_attach_device() 挂载后，无效引脚号会被 RA GPIO 驱动当作 PFS 索引使用，从而触发总线异常。

此外，SPI 驱动将 FSP 生成的 const 扩展配置强制转换为可写指针，并让波特率计算函数直接写入该配置。在 RA8P1 M85 上，该配置位于 Flash，写入时会触发 IMPRECISERR。SPI 控制器已经打开后也无法直接应用下一档时钟配置，导致时钟矩阵测试不能连续运行。

你的解决方案是什么 (what is your solution)

分别修改 bsp/renesas/libraries/HAL_Drivers/drivers/drv_sci.c 和 drv_spi.c：

• 当配置为 RT_SPI_NO_CS 或 cs_pin == PIN_NONE 时跳过 CS 引脚写操作；
• 对有效 CS，根据 RT_SPI_CS_HIGH 设置正确的空闲电平；
• 为每个 SPI 总线保存可写的 FSP 基础配置和扩展配置副本，在副本中计算运行时波特率，避免修改 Flash 中的生成配置；
• SPI 配置变化且 FSP 实例已经打开时，关闭并使用新配置重新打开控制器。

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

• BSP: bsp/renesas/ra8d1-vision-board

  • 使用 sci2s，MOSI/MISO 回环，最大时钟 1 MHz，components.drivers.spi.loopback 测试通过。

• BSP: bsp/renesas/ra8p1-titan-board/m85

  • 使用 spi0，MOSI/MISO 回环，时钟矩阵最大 10 MHz，components.drivers.spi.loopback 测试通过。

• .config:

  • RA8D1: CONFIG_BSP_USING_SCI2=y、CONFIG_BSP_USING_SCI2_SPI=y、CONFIG_RT_UTEST_SPI_LOOPBACK=y、CONFIG_RT_UTEST_SPI_LOOPBACK_BUS_NAME="sci2s"、CONFIG_RT_UTEST_SPI_LOOPBACK_MAX_HZ=1000000
  • RA8P1 M85: CONFIG_BSP_USING_SPI0=y、CONFIG_RT_UTEST_SPI_LOOPBACK=y、CONFIG_RT_UTEST_SPI_LOOPBACK_BUS_NAME="spi0"、CONFIG_RT_UTEST_SPI_LOOPBACK_MAX_HZ=10000000

• action:

]

当前拉取/合并请求的状态 Intent for your PR

必须选择一项 Choose one (Mandatory):

• 本拉取/合并请求是一个草稿版本 This PR is for a code-review and is intended to get feedback
• 本拉取/合并请求是一个成熟版本 This PR is mature, and ready to be integrated into the repo

代码质量 Code Quality：

我在这个拉取/合并请求中已经考虑了 As part of this pull request, I've considered the following:

• 已经仔细查看过代码改动的对比 Already check the difference between PR and old code
• 代码风格正确，包括缩进空格，命名及其他风格 Style guide is adhered to, including spacing, naming and other styles
• 没有垃圾代码，代码尽量精简，不包含#if 0代码，不包含已经被注释了的代码 All redundant code is removed and cleaned up
• 所有变更均有原因及合理的，并且不会影响到其他软件组件代码或BSP All modifications are justified and not affect other components or BSP
• 对难懂代码均提供对应的注释 I've commented appropriately where code is tricky
• 代码是高质量的 Code in this PR is of high quality
• 已经使用clang-format 源码格式化工具确保格式符合RT-Thread代码规范 This PR has been formatted with clang-format and complies with RT-Thread code specification
• 如果是新增bsp, 已经添加ci检查到.github/ALL_BSP_COMPILE.json 详细请参考链接BSP自查

[github-actions]

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If you have any questions, feel free to reach out. Thanks again for your contribution!

[github-actions]

📌 Code Review Assignment

🏷️ Tag: bsp_renesas

Reviewers: @kurisaW

Changed Files (Click to expand)

• bsp/renesas/libraries/HAL_Drivers/drivers/drv_sci.c
• bsp/renesas/libraries/HAL_Drivers/drivers/drv_spi.c

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📊 Current Review Status (Last Updated: 2026-08-24 18:18 CST)

• ⌛ @kurisaW Pending Review

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[github-actions]

MemBrowse Memory Report

No memory changes detected for:

• renesas-ra2l1

[CYFS3]

v5.3.0