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uio: Documentation: Add information on using uio_pdrv_genirq with DT 

Add a paragraph to describe the use of the "of_id" module parameter,
along with the new DT property.

Signed-off-by: Daniel Mack <daniel@zonque.org>
Link: https://lore.kernel.org/r/20190815212807.25058-2-daniel@zonque.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Daniel Mack 2019-08-15 23:28:07 +02:00 committed by Greg Kroah-Hartman
parent b0297622a9
commit ef9ae0c58b
1 changed files with 7 additions and 0 deletions
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7
Documentation/driver-api/uio-howto.rst
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@ -408,6 +408,13 @@ handler code. You also do not need to know anything about the chip's
internal registers to create the kernel part of the driver. All you need
to know is the irq number of the pin the chip is connected to.
When used in a device-tree enabled system, the driver needs to be
probed with the ``"of_id"`` module parameter set to the ``"compatible"``
string of the node the driver is supposed to handle. By default, the
node's name (without the unit address) is exposed as name for the
UIO device in userspace. To set a custom name, a property named
``"linux,uio-name"`` may be specified in the DT node.
Using uio_dmem_genirq for platform devices
------------------------------------------