d83d251bf3
First of all, Unisoc's IC provides cmd delay and read delay to ensure that the host can get the correct data. However, according to SD Spec, there is no need to do tuning in high speed mode, but with the development of chip processes, it is more and more difficult to find a suitable delay to cover all the chips. Therefore, we need SD high speed mode online tuning. In addition, we added mmc_sd_switch() and mmc_send_status() to the header file to allow it to be usable by the driver. Signed-off-by: Wenchao Chen <wenchao.chen@unisoc.com> Link: https://lore.kernel.org/r/20230825091743.15613-3-wenchao.chen@unisoc.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.