4c3ea81aa8
The TPS6598x PD controller supports firmware updates that can be loaded either from an external flash memory or a host using the device's I2C host interface. This patch implements the second approach, which is especially relevant if no flash memory is available. In order to make patch bundle updates, a series of tasks (special commands) must be sent to the device as it is documented in the TPS65987DDH and TPS65988DH Host Interface Technical Reference Manual[1], section 4.11 (Patch Bundle Update Tasks). The update sequence is as follows: 1. PTCs - Start Patch Load Sequence: the proposed approach includes device and application configuration data. 2. PTCd - Patch Download: 64-byte data chunks must be sent until the end of the firmware file is reached (the last chunk may be shorter). 3. PTCc - Patch Data Transfer Complete: ends the patch loading sequence. After this sequence and if no errors occurred, the device will change its mode to 'APP' after SETUP_MS milliseconds, and then it will be ready for normal operation. [1] https://www.ti.com/lit/ug/slvubh2b/slvubh2b.pdf?ts=1697623299919&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTPS65987D Signed-off-by: Javier Carrasco <javier.carrasco@wolfvision.net> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Link: https://lore.kernel.org/r/20231207-tps6598x_update-v2-4-f3cfcde6d890@wolfvision.net Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.