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The device has up to 5 potentially independent power supplies: AVDD, DVDD, DVVDIO, VBAT and PVDD. The former 3 are mandatory for the device to function. One of VBAT and PVDD should also be made available. Regulators are enabled during probe time and will stay active except when in suspend mode. Futher, the chip needs to be informed about the presence of VBAT through a bit in register 0x20a0. Signed-off-by: Daniel Mack <daniel@zonque.org> Link: https://lore.kernel.org/r/20220624104712.1934484-5-daniel@zonque.org Signed-off-by: Mark Brown <broonie@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.