bsps/microblaze: Add device tree getter

This allows drivers to read configuration data from the device tree if
the BSP is built with device tree support.

1 files changed, 65 insertions, 0 deletions

diff --git a/bsps/microblaze/include/bsp/microblaze-fdt-support.h b/bsps/microblaze/include/bsp/microblaze-fdt-support.h
new file mode 100644
index 0000000000..d4430c5a3a
--- /dev/null
+++ b/bsps/microblaze/include/bsp/microblaze-fdt-support.h
@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @ingroup RTEMSBSPsMicroblaze
+ *
+ * @brief This header file provides support for the device tree.
+ */
+
+/*
+ * Copyright (C) 2022 On-Line Applications Research Corporation (OAR)
+ *
+ * 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 LIBBSP_MICROBLAZE_MICROBLAZE_FDT_SUPPORT_H
+#define LIBBSP_MICROBLAZE_MICROBLAZE_FDT_SUPPORT_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+
+/**
+ * @brief Get the value of a property from a compatible node in the device tree.
+ *
+ * @param[in] compatible The 'compatible' string to match against.
+ * @param[in] prop_name The property name.
+ * @param[in] default_value The default value to return if no compatible node
+ *                          was found or the property was not found.
+ *
+ * @return The value of the property or the default value.
+ */
+uint32_t try_get_prop_from_device_tree(
+  const char *compatible,
+  const char *prop_name,
+  uint32_t default_value
+);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LIBBSP_MICROBLAZE_MICROBLAZE_FDT_SUPPORT_H */