forked from Minki/linux
mainlining shenanigans
4c3c59544f
Currently, the ACPI enumeration that takes place when registering a SPI master only considers immediate child devices in the ACPI namespace, rather than checking the ResourceSource field in the SpiSerialBus() resource descriptor. This is incorrect: SPI slaves could reside anywhere in the ACPI namespace, and so we should enumerate the entire namespace and look for any device that refers to the newly registered SPI master in its resource descriptor. So refactor the existing code and use a lookup structure so that allocating the SPI device structure is deferred until we have identified the device as an actual child of the controller. This approach is loosely based on the way the I2C subsystem handles ACPI enumeration. Note that Apple x86 hardware does not rely on SpiSerialBus() resources in _CRS but uses nested devices below the controller's device node in the ACPI namespace, with a special set of device properties. This means we have to take care to only parse those properties for device nodes that are direct children of the controller node. Cc: Mika Westerberg <mika.westerberg@linux.intel.com> Cc: linux-spi@vger.kernel.org Cc: broonie@kernel.org Cc: andy.shevchenko@gmail.com Cc: masahisa.kojima@linaro.org Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Jarkko Nikula <jarkko.nikula@linux.intel.com> Cc: linux-acpi@vger.kernel.org Cc: Lukas Wunner <lukas@wunner.de> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Mark Brown <broonie@kernel.org> |
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| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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 Restructured Text 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.