9243a195be
On Odroid XU3/4 and other Exynos5422 based boards there is a case, that different devices on the board are supplied by different regulators with non-fixed voltages. If one of these devices temporarily requires higher voltage, there might occur a situation that the spread between two devices' voltages is so high, that there is a risk of changing 'high' and 'low' states on the interconnection between devices powered by those regulators. Uncoupled regulators should be a special case of coupled regulators, so they should share a common voltage setting path. When enabling, disabling or setting voltage of a coupled regulator, all coupled regulators should be locked. Regulator's supplies should be locked, when setting voltage of a single regulator. Enabling a coupled regulator or setting its voltage should not be possible if some of its coupled regulators, has not been registered. Add function for locking coupled regulators and supplies. Extract a new function regulator_set_voltage_rdev() from regulator_set_voltage_unlocked(), which is called when setting voltage of a single regulator. Signed-off-by: Maciej Purski <m.purski@samsung.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> 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.