Nicolas Ferre
4aa4a00457
[ Upstream commit6fc5bdfa87] Change how the Backup Unit Power is configured and force the automatic/hardware mode. This change eliminates the need for software management of the power switch, ensuring it transitions to the backup power source before entering low power modes. This is done in the only location where this switch was configured. It's usually done in the bootloader. Previously, the loss of the VDDANA (or VDDIN33) power source was not automatically compensated by an alternative power source. This resulted in the loss of Backup Unit content, including Backup Self-refresh low power mode information, OTP emulation configuration, and boot configuration, for instance. Fixes:ac809e7879("ARM: at91: pm: switch backup area to vbat in backup mode") Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Link: https://lore.kernel.org/r/20241125165648.509162-1-nicolas.ferre@microchip.com Signed-off-by: Claudiu Beznea <claudiu.beznea@tuxon.dev> Signed-off-by: Sasha Levin <sashal@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.