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diff --git a/src/ipa/libipa/algorithms/af_hill_climbing.cpp b/src/ipa/libipa/algorithms/af_hill_climbing.cpp
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+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2021, Red Hat
+ * Copyright (C) 2022, Ideas On Board
+ * Copyright (C) 2022, Theobroma Systems
+ *
+ * af_hill_climbing.cpp - AF Hill Climbing common algorithm
+ */
+
+#include "af_hill_climbing.h"
+
+/**
+ * \file af_hill_climbing.h
+ * \brief AF Hill Climbing common algorithm
+ */
+
+namespace libcamera {
+
+LOG_DEFINE_CATEGORY(Af)
+
+namespace ipa::common::algorithms {
+
+/**
+ * \class AfHillClimbing
+ * \brief The base class implementing hill climbing AF control algorithm
+ * \tparam Module The IPA module type for this class of algorithms
+ *
+ * Control part of auto focus algorithm. It calculates the lens position basing
+ * on contrast measure supplied by the higher level. This way it is independent
+ * from the platform.
+ *
+ * Derived class should call processAutofocus() for each measured contrast value
+ * and set the lens to the calculated position.
+ */
+
+/**
+ * \fn AfHillClimbing::setMode()
+ * \copydoc libcamera::ipa::common::algorithms::AfAlgorithm::setMode
+ */
+
+/**
+ * \fn AfHillClimbing::setRange()
+ * \copydoc libcamera::ipa::common::algorithms::AfAlgorithm::setRange
+ */
+
+/**
+ * \fn AfHillClimbing::setSpeed()
+ * \copydoc libcamera::ipa::common::algorithms::AfAlgorithm::setSpeed
+ */
+
+/**
+ * \fn AfHillClimbing::setMetering()
+ * \copydoc libcamera::ipa::common::algorithms::AfAlgorithm::setMetering
+ */
+
+/**
+ * \fn AfHillClimbing::setWindows()
+ * \copydoc libcamera::ipa::common::algorithms::AfAlgorithm::setWindows
+ */
+
+/**
+ * \fn AfHillClimbing::setTrigger()
+ * \copydoc libcamera::ipa::common::algorithms::AfAlgorithm::setTrigger
+ */
+
+/**
+ * \fn AfHillClimbing::setPause()
+ * \copydoc libcamera::ipa::common::algorithms::AfAlgorithm::setPause
+ */
+
+/**
+ * \fn AfHillClimbing::setLensPosition()
+ * \copydoc libcamera::ipa::common::algorithms::AfAlgorithm::setLensPosition
+ */
+
+/**
+ * \fn AfHillClimbing::processAutofocus()
+ * \brief Run the auto focus algorithm loop
+ * \param[in] currentContrast New value of contrast measured for current frame
+ *
+ * This method should be called for each new contrast value that was measured,
+ * usually in the process() method.
+ *
+ * \return New lens position calculated by AF algorithm
+ */
+
+} /* namespace ipa::common::algorithms */
+
+} /* namespace libcamera */