58d268619a
New reference manuals show that there is actually a status bit for the ADB400 handshake. Add a poll loop to wait for the ADB400 to acknowledge our request. [Peng Fan: i.MX8MM has blk ctl module, the handshake can only finish after setting blk ctl. The blk ctl driver will set the bus clk bit and the handshake will finish there. we just add a delay and suppose the handshake will finish after that.] Tested-by: Frieder Schrempf <frieder.schrempf@kontron.de> Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Peng Fan <peng.fan@nxp.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.