bsps/arm: Add Doxygen group for Armv7-M SysTick

Change license to BSD-2-Clause according to file history and contributor
agreements.

bsps/arm/include/bsp/clock-armv7m.h

@@ -1,9 +1,37 @@
-/*
- * Copyright (c) 2011, 2018 Sebastian Huber.  All rights reserved.
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rtems.org/license/LICENSE.
+ * @ingroup RTEMSDriverClockArmv7MSysTick
+ *
+ * @brief This header file provides support for Armv7-M clock drivers.
+ */
+
+/*
+ * Copyright (C) 2024 embedded brains GmbH & Co. KG
+ * Copyright (C) 2011, 2018 Sebastian Huber
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef BSP_CLOCK_ARMV7M_H
@@ -18,6 +46,17 @@
 extern "C" {
 #endif /* __cplusplus */
 
+/**
+ * @defgroup RTEMSDriverClockArmv7MSysTick Armv7-M SysTick Clock Driver
+ *
+ * @ingroup RTEMSDriverClockImpl
+ *
+ * @brief This group contains the Armv7-M SysTick support and Clock Driver
+ *   implementation.
+ *
+ * @{
+ */
+
 #ifdef ARM_MULTILIB_ARCH_V7M
 
 typedef struct {
@@ -67,6 +106,8 @@ static uint32_t _ARMV7M_Clock_counter(ARMV7M_Timecounter *tc)
 
 #endif /* ARM_MULTILIB_ARCH_V7M */
 
+/** @} */
+
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */

bsps/arm/shared/clock/clock-armv7m.c

@@ -1,5 +1,13 @@
 /* SPDX-License-Identifier: BSD-2-Clause */
 
+/**
+ * @file
+ *
+ * @ingroup RTEMSDriverClockArmv7MSysTick
+ *
+ * @brief This source file contains the Armv7-M SysTick Clock Driver.
+ */
+
 /*
  * Copyright (C) 2020 embedded brains GmbH & Co. KG
  * Copyright (C) 2011, 2018 Sebastian Huber

bsps/arm/shared/cpucounter/cpucounter-armv7m.c

@@ -1,5 +1,13 @@
 /* SPDX-License-Identifier: BSD-2-Clause */
 
+/**
+ * @file
+ *
+ * @ingroup RTEMSDriverClockArmv7MSysTick
+ *
+ * @brief This source file contains the Armv7-M SysTick CPU counter.
+ */
+
 /*
  * Copyright (C) 2016, 2018 embedded brains GmbH & Co. KG
  *