bsps/stm32h7: add board C files for stm32h747i-disco BSP

Besides C files for the BSP variant the patch also provides license
clarification on system_stm32h7xx.c file which is provided
in boards/stm/stm32h747i-disco directory.
The files comes from STM32CubeH7 project and references "root directory"
in its license comment and it's not clear where this points out.
Let's add clarification comment about it and also based on it
and resulting license let's add SPDX license identifier.

Sponsored-By:	Precidata

1 files changed, 39 insertions, 0 deletions

diff --git a/bsps/arm/stm32h7/boards/stm/stm32h747i-disco/stm32h7-config-per.c b/bsps/arm/stm32h7/boards/stm/stm32h747i-disco/stm32h7-config-per.c
new file mode 100644
index 0000000000..3a691a2c8b
--- /dev/null
+++ b/bsps/arm/stm32h7/boards/stm/stm32h747i-disco/stm32h7-config-per.c
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/*
+ * Copyright (C) 2022 Karel Gardas <karel@functional.vision>
+ *
+ * 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stm32h7/hal.h>
+
+const RCC_PeriphCLKInitTypeDef stm32h7_config_peripheral_clocks = {
+  /* for stm32h747i-disco BSP we provide only minimalistic peripheral
+     configuration just to make available U(S)ART1 working */
+  .PeriphClockSelection = RCC_PERIPHCLK_USART1,
+  .Usart16ClockSelection = RCC_USART16CLKSOURCE_D2PCLK2
+};