rt-thread.git/components/drivers/spi/dev_spi_bus.c, branch masterUnnamed repository; edit this file 'description' to name the repository.http://cgit.235523.xyz/rt-thread.git/atom/components/drivers/spi/dev_spi_bus.c?h=master2026-01-20T14:05:28Z[drivers] Fix OFW bus conflict and prevent duplicate device creation2026-01-20T14:05:28Zlhxj2743257167@qq.com2025-12-25T09:56:52Zurn:sha1:7641ef68855601bc73252546bf41a96d6078444e
Problem:
When enumerating device tree nodes, platform bus and native buses (I2C/SPI)
may create duplicate devices for the same OFW node, causing cross-bus conflicts.
This triggers assertion failure '(dev->bus != new_bus)' in
rt_bus_reload_driver_device() during boot on minimal DM-enabled systems.
Root Cause:
1. Platform bus tries to reload devices that already belong to other buses
by calling rt_bus_reload_driver_device(dev->bus, dev), which violates
the API contract (requires dev->bus != new_bus).
2. Native buses (I2C/SPI) do not mark OFW nodes as occupied, so platform
bus creates duplicate platform devices for I2C/SPI client nodes.
Solution:
1. components/drivers/core/platform_ofw.c: Return RT_EOK when np->dev exists,
letting the native bus handle device lifecycle instead of cross-bus reload.
2. components/drivers/i2c/dev_i2c_bus.c: Mark i2c_client_np->dev during scan
to prevent platform bus from duplicating I2C client devices.
3. components/drivers/spi/dev_spi_bus.c: Mark spi_dev_np->dev during scan
to prevent platform bus from duplicating SPI devices.
Tested on Spacemit K1 RISC-V platform with minimal DM configuration.
Signed-off-by: lhxj <2743257167@qq.com>
[SPI]Update and fixup the SPI2025-07-10T05:28:16ZGUI39894654+GuEe-GUI@users.noreply.github.com2025-07-10T05:28:16Zurn:sha1:8a7ef41c3c95da1d1c13627709e0658d0b1e3180
* Make a priv data read API for probed SPI device
* Fixup the SPI device pre-alloc[DM/SPI] Make CS pin config fixed in system (#9977)2025-02-11T06:54:59ZGUI39894654+GuEe-GUI@users.noreply.github.com2025-02-11T06:54:59Zurn:sha1:1564735b5ccba8ca09cae340333b2bfb032205d3
Make a max CS pin value (16) for SPI, that will not
alloc `*cs_pins` by malloc, because drivers call
`rt_device_unregister` may not free item.
Fixup the QSPI init configure member in DM mode.
Make SoC Kconfig import easy.
Signed-off-by: GuEe-GUI <2991707448@qq.com>[DM/SPI] Support DM mode in SPI2024-11-27T10:04:07ZGuEe-GUI2991707448@qq.com2024-11-27T03:08:08Zurn:sha1:6f68ca7c7133a2a06b5be8663ec644b9181a2c9d
Signed-off-by: GuEe-GUI <2991707448@qq.com>