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diff --git a/src/libcamera/control_validator.cpp b/src/libcamera/control_validator.cpp
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+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * control_validator.cpp - Control validator
+ */
+
+#include "control_validator.h"
+
+/**
+ * \file control_validator.h
+ * \brief Abstract control validator
+ */
+
+namespace libcamera {
+
+/**
+ * \class ControlValidator
+ * \brief Interface for the control validator
+ *
+ * The ControlValidator class is used by the ControlList class to validate
+ * controls added to the list. It is an abstract class providing an interface
+ * for object-specific control validation, such a Camera controls and V4L2
+ * controls.
+ */
+
+/**
+ * \fn ControlValidator::name()
+ * \brief Retrieve the name of the object associated with the validator
+ * \return The name of the object associated with the validator
+ */
+
+/**
+ * \fn ControlValidator::validate()
+ * \brief Validate a control
+ * \param[in] id The control ID
+ *
+ * This method validates the control \a id against the object corresponding to
+ * the validator. It shall at least validate that the control is applicable to
+ * the object instance, and may perform additional checks.
+ *
+ * \return True if the control is valid, false otherwise
+ */
+
+} /* namespace libcamera */