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Some stm32 implementations need the receive clock running in suspend, as indicated by dwmac->ops->clk_rx_enable_in_suspend. The existing code achieved this in a rather complex way, by passing a flag around. However, the clk API prepare/enables are counted - which means that a clock won't be stopped as long as there are more prepare and enables than disables and unprepares, just like a reference count. Therefore, we can simplify this logic by calling clk_prepare_enable() an additional time in the probe function if this flag is set, and then balancing that at remove time. With this, we can avoid passing a "are we suspending" and "are we resuming" flag to various functions in the driver. Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Reviewed-by: Simon Horman <horms@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| README | ||
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 reStructuredText 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.