8d386fa04d
Due to many carrier boards pulling the usdhc1 signals up to 3.3 volt we need to disable 1.8 volt signaling. Adding the no-1-8-v property basically disables UHS-I modes by default. Also pull-up the command and data lines to the +V3.3_1.8_SD rail and set them to the 200 MHz speed grade (e.g. pinmux bits 7-6: meaning 11 SPEED_3_max_200MHz). Explicitly specify a bus-width of <4> in the module-level device tree include file and drop the no-1-8-v property from the carrier boards device trees. Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com> Signed-off-by: Denys Drozdov <denys.drozdov@toradex.com> Signed-off-by: Andrejs Cainikovs <andrejs.cainikovs@toradex.com> Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com> Signed-off-by: Shawn Guo <shawnguo@kernel.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.