mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-09 00:43:08 -04:00
2e0e629d0f
On the Advantech PCI-1730, four digital inputs (DI0, DI1, IDI0 and IDI1) can be used as external interrupt sources. Each input can be programmed to latch an interrupt bit on either a rising edge or a falling edge (but not both). Add a new Comedi subdevice for each interrupt source, supporting the asynchronous command interface. Subdevices 5, 6, 7 and 8 are for interrupt sources DI0, DI1, IDI0 and IDI1. They each write the state of 16 digital inputs to the subdevice's data buffer each time the corresponding interrupt occurs. (For DI0 and DI1, use the 16 non-isolated digital inputs. For IDI0 and IDI1, use the 16 isolated digital inputs.) Currently, only rising edge triggers are supported. Support could be added for the PCI-1733 and PCI-1736. Signed-off-by: Bernd Harries <bha@gmx.de> Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Link: https://lore.kernel.org/r/20210118144359.378730-2-abbotti@mev.co.uk Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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 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.