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The rt5651 does not have a built-in speaker amplifier, so it is often used together with an external amplifier. On Cherry Trail boards this external amplifier's enable pin is driven through a GPIO, which is given as the first GPIO in the ACPI resources of the codec fwnode. This commit adds support to the bytcr_rt5651 for this GPIO, fixing the speaker not working on CHT devices with a rt5651 codec. Cc: Carlo Caione <carlo@endlessm.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.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 Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
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.