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1302c71a30
The bootloader NAK's all I2C communication after the first 64-byte bulk write if the bus frequency is equal to 400 kHz. This prevents the platform from pushing updated firmware to the device. The vendor's USB bootloader programming dongle appears to insert a delay between the "open" command and the first 64-byte bulk write. Adding a similar delay to the driver seems to eliminate the issue. Furthermore, the dongle does not access the bootloader immediately after powering up the device. Follow suit by adding a delay before the "open" command to avoid wasted retries at 400 kHz. Signed-off-by: Jeff LaBundy <jeff@labundy.com> Link: https://lore.kernel.org/r/1611002626-5889-4-git-send-email-jeff@labundy.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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.