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The wm8524 codec is connected to the SAI interface. There are two audio plls on i.MX8MQ, one pll can be the clock source of 44kHz series rates, another pll can be clock source of 48kHz series rates. Previously it only supported 48kHz series rates, with this change the supported rates will include 44kHz series rates, from 8kHz to 192kHz. As commit17cc308b18("ASoC: wm8524: enable constraints when sysclk is configured.") make wm8524 release the constraint when codec's sysclk is not configured, so configure the cpu dai's sysclk to support more rates with the 'clocks' property removed. Add mclk-fs property for the sysclk ratio, which is required by calculating the sysclk, 256 is a common ratio for audio. 'system-clock-direction-out' is a required property after commit5725bce709("ASoC: simple-card-utils: Unify clock direction by clk_direction") to specify the clock direction. Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com> Reviewed-by: Peng Fan <peng.fan@nxp.com> Signed-off-by: Shawn Guo <shawnguo@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 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.