58d0bf843b
Currently only LX2160A eSDHC supports eMMC HS400. According to a large number of tests, eMMC HS400 failed to work at 150MHz, and for a few boards failed to work at 175MHz. But eMMC HS400 worked fine on 200MHz. We hadn't found the root cause but setting eSDHC_DLLCFG0[DLL_FREQ_SEL] = 0 using slow delay chain seemed to resovle this issue. Let's use this as fixup for now. Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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.