linux-kernel - [PATCH v4 8/9] docs: iio: ad4062: Add GPIO Controller support

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Message-ID: <20251217-staging-ad4062-v4-8-7890a2951a8f@analog.com>
Date: Wed, 17 Dec 2025 13:13:31 +0100
From: Jorge Marques <jorge.marques@...log.com>
To: Lars-Peter Clausen <lars@...afoo.de>,
        Michael Hennerich
	<Michael.Hennerich@...log.com>,
        Jonathan Cameron <jic23@...nel.org>,
        "David
 Lechner" <dlechner@...libre.com>,
        Nuno Sá
	<nuno.sa@...log.com>,
        Andy Shevchenko <andy@...nel.org>, Rob Herring
	<robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>, Jonathan Corbet <corbet@....net>,
        Linus Walleij
	<linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>
CC: <linux-iio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-doc@...r.kernel.org>,
        <linux-gpio@...r.kernel.org>, Jorge Marques <jorge.marques@...log.com>,
        "Linus Walleij" <linusw@...nel.org>
Subject: [PATCH v4 8/9] docs: iio: ad4062: Add GPIO Controller support

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

Signed-off-by: Jorge Marques <jorge.marques@...log.com>
Reviewed-by: Linus Walleij <linusw@...nel.org>
---
 Documentation/iio/ad4062.rst | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Documentation/iio/ad4062.rst b/Documentation/iio/ad4062.rst
index 8d388f9e2f450..d77287836430c 100644
--- a/Documentation/iio/ad4062.rst
+++ b/Documentation/iio/ad4062.rst
@@ -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.

-- 
2.51.1