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064129e223
To avoid "too much work for irq" issue, cherry pick the the patch. It reads the RBR to clear the time out interrupt, but sometime the rx fifo may be not empty while cpu reads the RBR. Which would cause the data lost. patch for "too much work":06451e93ab59e5b1843c29cbb468a274f4919563 By the way, current patch can't get rid of the risk entirely, so I try a lot to solve it. Unfortunately, I only got the phenomenon that lower pclk can reduce the probability. And I check the dw data sheet, it has pclk and sclk, so there is synchronization problem. But it only requires (slck < 4*pclk). Change-Id: I01a36c689b43310294c45294abcf4982f5ddf2af Signed-off-by: Huibin Hong <huibin.hong@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.
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.