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The sequence for updating the time/date registers is slightly different between PCF2127/29 and PCF2131. For PCF2127/29, during write operations, the time counting circuits (memory locations 03h through 09h) are automatically blocked. For PCF2131, time/date registers write access requires setting the STOP bit and sending the clear prescaler instruction (CPR). STOP then needs to be released once write operation is completed. Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com> Link: https://lore.kernel.org/r/20230622145800.2442116-14-hugo@hugovil.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.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.