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diff --git a/rtemsbsd/include/bsp/st-sdmmc-config.h b/rtemsbsd/include/bsp/st-sdmmc-config.h
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+++ b/rtemsbsd/include/bsp/st-sdmmc-config.h
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+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/*
+ * Copyright (C) 2021 embedded brains GmbH (http://www.embedded-brains.de)
+ *
+ * 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_ST_SDMMC_CONFIG_H
+#define BSP_ST_SDMMC_CONFIG_H
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stm32h7/hal.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+struct st_sdmmc_config {
+	/**
+	 * Number of data lines. Can be 1, 4 or 8
+	 */
+	uint8_t data_lines;
+	/**
+	 * Polarity of the DIR pins. See "SDMMC_POWER" register in the
+	 * STM32H7xx data sheet for that. If you don't have the lines, you can
+	 * use any value.
+	 */
+	bool dirpol;
+	/**
+	 * Possible OCR voltages. Should be something like
+	 * MMC_OCR_290_300 | MMC_OCR_300_310 depending on card supply.
+	 */
+	uint32_t ocr_voltage;
+};
+
+/**
+ * Get hardware specific configuration for SDMMC.
+ *
+ * This function can be overwritten in the application to adapt to another board
+ * configuration. The sdmmc_base points to the base address of the SDMMC
+ * instance. The cfg structure is set to zero before calling this function so
+ * that only the necessary fields have to be initialized.
+ */
+void st_sdmmc_get_config(uintptr_t sdmmc_base, struct st_sdmmc_config *cfg);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* BSP_ST_SDMMC_CONFIG_H */