From e54def4ad8144ab15f826416e2e0f290ef1901b4 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 19 Jun 2024 23:00:30 +0200
Subject: Adding upstream version 6.9.2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../gpio/gpio-v2-line-set-config-ioctl.rst         | 58 ++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 Documentation/userspace-api/gpio/gpio-v2-line-set-config-ioctl.rst

(limited to 'Documentation/userspace-api/gpio/gpio-v2-line-set-config-ioctl.rst')

diff --git a/Documentation/userspace-api/gpio/gpio-v2-line-set-config-ioctl.rst b/Documentation/userspace-api/gpio/gpio-v2-line-set-config-ioctl.rst
new file mode 100644
index 0000000000..9b942a8a53
--- /dev/null
+++ b/Documentation/userspace-api/gpio/gpio-v2-line-set-config-ioctl.rst
@@ -0,0 +1,58 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+.. _GPIO_V2_LINE_SET_CONFIG_IOCTL:
+
+*****************************
+GPIO_V2_LINE_SET_CONFIG_IOCTL
+*****************************
+
+Name
+====
+
+GPIO_V2_LINE_SET_CONFIG_IOCTL - Update the configuration of previously requested lines.
+
+Synopsis
+========
+
+.. c:macro:: GPIO_V2_LINE_SET_CONFIG_IOCTL
+
+``int ioctl(int req_fd, GPIO_V2_LINE_SET_CONFIG_IOCTL, struct gpio_v2_line_config *config)``
+
+Arguments
+=========
+
+``req_fd``
+    The file descriptor of the GPIO character device, as returned in the
+    :c:type:`request.fd<gpio_v2_line_request>` by gpio-v2-get-line-ioctl.rst.
+
+``config``
+    The new :c:type:`configuration<gpio_v2_line_config>` to apply to the
+    requested lines.
+
+Description
+===========
+
+Update the configuration of previously requested lines, without releasing the
+line or introducing potential glitches.
+
+The new configuration must specify the configuration of all requested lines.
+
+The same :ref:`gpio-v2-get-line-config-rules` and
+:ref:`gpio-v2-get-line-config-support` that apply when requesting the lines
+also apply when updating the line configuration.
+
+The motivating use case for this command is changing direction of
+bi-directional lines between input and output, but it may also be used to
+dynamically control edge detection, or more generally move lines seamlessly
+from one configuration state to another.
+
+To only change the value of output lines, use
+gpio-v2-line-set-values-ioctl.rst.
+
+Return Value
+============
+
+On success 0.
+
+On error -1 and the ``errno`` variable is set appropriately.
+Common error codes are described in error-codes.rst.
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