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Register a new driver(spi_amd_pci) for the HID2 SPI controller using the PCI ID of the LPC bridge device. Add a new common probe function in spi_amd driver to encapsulate the code required for registering the controller driver. This function will be utilized by both the existing ACPI driver and the newly introduced PCI-based driver for the HID2 SPI controller. The MMIO register base address of the HID2 SPI controller can be obtained from the PCI LPC bridge registers. By implementing these changes, the DMA buffer will be correctly associated with the LPC bridge device, preventing IO_PAGE_FAULT caused by IOMMU when the LPC bridge attempts DMA operations on addresses owned by the HID2 SPI controller. Co-developed-by: Krishnamoorthi M <krishnamoorthi.m@amd.com> Signed-off-by: Krishnamoorthi M <krishnamoorthi.m@amd.com> Co-developed-by: Akshata MukundShetty <akshata.mukundshetty@amd.com> Signed-off-by: Akshata MukundShetty <akshata.mukundshetty@amd.com> Signed-off-by: Raju Rangoju <Raju.Rangoju@amd.com> Link: https://patch.msgid.link/20250402121514.2941334-1-Raju.Rangoju@amd.com Signed-off-by: Mark Brown <broonie@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.