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2b0efe8204
For some eMMC, after switch to HS400ES mode, it need to config the strobe dll target dealy even if the clock is 50MHZ or 25MHz, otherwise will meet CMD index/crc error when send CMD13 to check the switch status. [ 2.473915] IRQ status 0x000a8001 [ 2.473934] mmc2: mmc_select_hs400es failed, error -84 [ 2.473938] mmc2: error -84 whilst initialising MMC card Signed-off-by: Haibo Chen <haibo.chen@nxp.com> Acked-by: Adrian Hunter <adrian.hunter@intel.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.