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docs: iio: ad4062: Add GPIO Controller support

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Explains the GPIO controller support with emphasis on the mask
depending on which GPs are exposed.

Signed-off-by: Jorge Marques <jorge.marques@analog.com>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Jorge Marques 2025-12-17 13:13:31 +01:00 • committed by Jonathan Cameron
parent ba3a34b1f5
commit d2ca7af298
1 changed files with 12 additions and 0 deletions
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12
Documentation/iio/ad4062.rst
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@ -29,6 +29,9 @@ the devicetree ``interrupt-names`` property:
- GP0: Is assigned the role of Threshold Either signal.
- GP1: Is assigned the role of Data Ready signal.
If the property ``gpio-controller`` is present in the devicetree, then the GPO
not present in the ``interrupt-names`` is exposed as a GPO.
Device attributes
=================
@ -134,3 +137,12 @@ The following event attributes are available:
- Set the hysteresis value for the maximum threshold.
* - ``thresh_rising_value``
- Set the maximum threshold value.
GPO controller support
======================
The device supports using GP0 and GP1 as GPOs. If the devicetree contains the
node ``gpio-controller```, the device is marked as a GPIO controller and the
GPs not listed in ``interrupt-names`` are exposed as a GPO. The GPIO index
matches the pin name, so if GP0 is not exposed but GP1 is, index 0 is masked
out and only index 1 can be set.