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After power up, the cs and clock is in default status, and the cs-high and clock polarity dts property configuration will take no effect until the calling of rockchip_spi_config in the first transmission. So preset them to make sure a correct voltage before the the first transmission comming. Change-Id: Ib00336a3ebda6e04bdb33c56c7da419bfb6efdd9 Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
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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.
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