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Extend the list of supported compatible strings with fsl,lx2160ardb-fpga. Since the register map exposed by the LX2160ARDB's FPGA also contains two GPIO controllers, accept the necessary GPIO pattern property. At the same time, add the #address-cells and #size-cells properties as valid ones so that the child nodes of the fsl,lx2160ardb-fpga node are addressable. This is necessary because when defining child devices such as the GPIO controller described in the added example, the child device needs a the reg property to properly identify its register location in the parent I2C device address space. Impose this restriction for the new compatible through an if-statement. The feature set exposed by these QIXIS FPGA devices is highly dependent on the board type, meaning that even though the FPGA found on the LX2160AQDS board (fsl,lx2160aqds-fpga) works in the same way in terms of access over I2C as the one found on the LX2160ARDB (fsl,lx2160ardb-fpga added here), the register map inside the device space is different since there are different on-board devices to be controlled. Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com> Acked-by: Conor Dooley <conor.dooley@microchip.com> Signed-off-by: Shawn Guo <shawnguo@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 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.