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For the AD7124 chip and some of its cousins the logical irq line (R̅D̅Y̅) is physically on the same pin as the spi MISO output (DOUT) and so reading a register might trigger an interrupt. For correct operation it's critical that the actual state of the pin can be read to judge if an interrupt event is a real one or just a spurious one triggered by toggling the line in its MISO mode. Allow specification of an "rdy-gpios" property that references a GPIO that can be used for that purpose. While this is typically the same GPIO also used (implicitly) as interrupt source, it is still supposed that the interrupt is specified as before and usual. Acked-by: Conor Dooley <conor.dooley@microchip.com> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com> Link: https://patch.msgid.link/7fc92a8539e55802d514332e70ee836a3ed08b66.1733504533.git.u.kleine-koenig@baylibre.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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.