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In some cases, the sysclk won't be configured on init, and sysclk can be changed in hw_params() according to different sample rate, for example, for 44kHz sample rate, the sysclk is 11.2896MHz, for 48kHz sample rate, the sysclk is 12.288MHz. In order to support the above case, only enable constraints when sysclk is configured, and check the rate in hw_params. So overall there are three cases that need to be considered: - call set_sysclk() on init, then constraints will be initialized. - don't call set_sysclk() on init, but call it after startup(), then constraints will be configured, the constraints can be cleared with call set_sysclk() again in shutdown(). - don't call set_sysclk() in the whole flow, then there are no any constraints. The clocks depend on cpu dai. Enlarge the WM8524_NUM_RATES to 12, as the supported rate range is 8kHz to 192kHz. Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com> Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com> Link: https://patch.msgid.link/20250620021403.624303-1-shengjiu.wang@nxp.com Signed-off-by: Mark Brown <broonie@kernel.org> |
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| drivers | ||
| fs | ||
| include | ||
| init | ||
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| ipc | ||
| kernel | ||
| lib | ||
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| README | ||
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.