7577316528
A variant may need to define some actions before and after a voltage switch. This patch adds 2 callbacks to manage signal voltage switch in the struct mmci_host_ops. ->pre_sig_volt_switch() allows to prepare a signal voltage switch before sending the SD_SWITCH_VOLTAGE command (CMD11). ->post_sig_volt_switch callback allows specific actions to be executed, after the I/O signal voltage level has been changed. Signed-off-by: Ludovic Barre <ludovic.barre@st.com> Link: https://lore.kernel.org/r/20200128090636.13689-8-ludovic.barre@st.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.