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The spi-orion driver disables its clocks whenever it is not used. In usual case during boot (i.e. using SPI flash) it is not a problem, as the child device driver is present and probed along with spi_register_master() execution. However in case the child device driver is not ready (e.g. when its type is module_spi_driver) the spi_setup() callback can be called after the spi-orion probe. It may happen, that as a result there will be an attempt to access controller's registers with the clocks disabled. Prevent such situations and make sure the clocks are on, each time the spi_setup() is called. Signed-off-by: Marcin Wojtas <mw@semihalf.com> Signed-off-by: Konstantin Porotchkin <kostap@marvell.com> Link: https://lore.kernel.org/r/20201223103827.29721-2-kostap@marvell.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.