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The MediaTek MT7921S is a WiFi/Bluetooth combo chip that works over SDIO. WiFi and Bluetooth are separate SDIO functions within the chip. While the Bluetooth SDIO function is fully discoverable, the chip has a pin that can reset just the Bluetooth core, as opposed to the full chip. This should be described in the device tree. Add a device tree binding for the Bluetooth SDIO function of the MT7921S specifically to document the reset line. This binding is based on the MMC controller binding, which specifies one device node per SDIO function. Cc: Sean Wang <sean.wang@mediatek.com> Signed-off-by: Chen-Yu Tsai <wenst@chromium.org> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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.