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3d2cbb6448
Depending on bcm2711's revision its emmc2 controller might have different DMA constraints. Raspberry Pi 4's firmware will take care of updating those, but only if a certain alias is found in the device tree. So, move emmc2 into its own bus, so as not to pollute other devices with dma-ranges changes and create the emmc2bus alias. Based in Phil ELwell's downstream implementation. Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Link: https://lore.kernel.org/r/20200304132437.20164-1-nsaenzjulienne@suse.de
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.