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60722c4eef
When the driver tries to get optional clock, it ignores all errors, but if only ignores -ENOENT, it will cover some real errors, such as -EPROBE_DEFER, so use devm_clk_get_optional() to get optional clock. Cc: Minas Harutyunyan <hminas@synopsys.com> Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> Acked-by: Minas Harutyunyan <hminas@synopsys.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.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.