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49a06cae6e
On the Allwinner R40 SoC, the "GMAC clock" register is in the CCU address space. Using a standard syscon to access it provides no coordination with the CCU driver for register access. Neither does it prevent this and other drivers from accessing other, maybe critical, clock control registers. On other SoCs, the register is in the "system control" address space, which might also contain controls for mapping SRAM to devices or the CPU. This hardware has the same issues. Instead, for these types of setups, we let the device containing the control register create a regmap tied to it. We can then get the device from the existing syscon phandle, and retrieve the regmap with dev_get_regmap(). Signed-off-by: Chen-Yu Tsai <wens@csie.org> Acked-by: Maxime Ripard <maxime.ripard@bootlin.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.