stm32mp1: ram: add tests in DDR interactive mode

Add command tests for DDR interactive mode, used during
board bring-up or with CubeMX DDR tools to verify the
DDR configuration.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/drivers/ram/stm32mp1/stm32mp1_tests.h b/drivers/ram/stm32mp1/stm32mp1_tests.h
new file mode 100644
index 0000000..8436780
--- /dev/null
+++ b/drivers/ram/stm32mp1/stm32mp1_tests.h
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause */
+/*
+ * Copyright (C) 2019, STMicroelectronics - All Rights Reserved
+ */
+
+#ifndef _RAM_STM32MP1_TESTS_H_
+#define _RAM_STM32MP1_TESTS_H_
+
+#include "stm32mp1_ddr_regs.h"
+
+enum test_result {
+	TEST_PASSED,
+	TEST_FAILED,
+	TEST_ERROR
+};
+
+struct test_desc {
+	enum test_result (*fct)(struct stm32mp1_ddrctl *ctl,
+				struct stm32mp1_ddrphy *phy,
+				char *string,
+				int argc, char *argv[]);
+	const char *name;
+	const char *usage;
+	const char *help;
+	u8 max_args;
+};
+
+extern const struct test_desc test[];
+extern const int test_nb;
+
+#endif