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The LP/LN and RP/RN differential pairs of rkdsm should keep in the same direction as much as possible when working and shutting down, otherwise the common mode output is likely to cause pop sound. Therefore, we can introduce the ioc register address as REG resource in dts, and switch the dsm pin to function and io state respectively when dsm starts and stops. Change-Id: I4a3e6f5e45f030fdbab74ee7d9a769fc8d77f86d Signed-off-by: Xing Zheng <zhengxing@rock-chips.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 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.