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Konrad Dybcio
30a7f99bef
Add support for SONY Xperia XZ2, XZ2 Compact and XZ3 smartphones, all based on the Qualcomm SDM845 chipset. There also exists a fourth Tama device, the XZ2 Premium (Aurora) with a 4K display, but it's relatively rare. The devices are affected by a scary UFS behaviour where sending a certain UFS command (which is worked around on downstream) renders the device unbootable, by effectively erasing the bootloader. Therefore UFS AND UFSPHY are strictly disabled for now. Downstream workaround: https://github.com/kholk/kernel/commit/2e7a9ee1c91a016baa0b826a7752ec45663a0561 This platform's bootloader is not very nice either. To boot mainline you need to flash a bogus DTBO (fastboot erasing may cut it, but it takes an inhumane amount of time) - one that's just 4 bytes (all zeroes) seems to work just fine. Of course, one can also provide a "normal" DTBO (device-specific DT overlayed on top of the SoC DT), but that's not yet supported by the mainline kernel build system. Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org> Reviewed-by: Martin Botka <martin.botka@somainline.org> Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20211111184630.605035-1-konrad.dybcio@somainline.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 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.