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c62f5032f7
Rework the comedi_8254 module to use a call-back function for register access. This will make it easier to isolate the parts that will depend on the `CONFIG_HAS_IOPORT` macro being defined and also allows the possibility of supplying an external callback function during initialization by a variant of the `comedi_8254_init()` and `comedi_8254_mm_init()` functions, although that has not been implemented yet. The `struct comedi_8254` members have been changed to use a pointer to a callback function and a context of type `unsigned long`. The `comedi_8254_init()` and `comedi_8254_mm_init()` functions use an internal callback function and set the context to the base address of the registers (for `comedi_8254_mm_init()` that involves converting a `void __iomem *` to `unsigned long`). A minor change to `dio200_subdev_8254_offset()` in the amplc_dio200_common module has been made due to the changes in `struct comedi_8254`. Cc: Arnd Bergmann <arnd@kernel.org> Cc: Niklas Schnelle <schnelle@linux.ibm.com> Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Link: https://lore.kernel.org/r/20230913170712.111719-3-abbotti@mev.co.uk Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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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.
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.