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diff --git a/include/dm/ut.h b/include/dm/ut.h
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+/*
+ * Simple unit test library for driver model
+ *
+ * Copyright (c) 2013 Google, Inc
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __DM_UT_H
+#define __DM_UT_H
+
+struct dm_test_state;
+
+/**
+ * ut_fail() - Record failure of a unit test
+ *
+ * @dms: Test state
+ * @fname: Filename where the error occured
+ * @line: Line number where the error occured
+ * @func: Function name where the error occured
+ * @cond: The condition that failed
+ */
+void ut_fail(struct dm_test_state *dms, const char *fname, int line,
+ const char *func, const char *cond);
+
+/**
+ * ut_failf() - Record failure of a unit test
+ *
+ * @dms: Test state
+ * @fname: Filename where the error occured
+ * @line: Line number where the error occured
+ * @func: Function name where the error occured
+ * @cond: The condition that failed
+ * @fmt: printf() format string for the error, followed by args
+ */
+void ut_failf(struct dm_test_state *dms, const char *fname, int line,
+ const char *func, const char *cond, const char *fmt, ...)
+ __attribute__ ((format (__printf__, 6, 7)));
+
+
+/* Assert that a condition is non-zero */
+#define ut_assert(cond) \
+ if (!(cond)) { \
+ ut_fail(dms, __FILE__, __LINE__, __func__, #cond); \
+ return -1; \
+ }
+
+/* Assert that a condition is non-zero, with printf() string */
+#define ut_assertf(cond, fmt, args...) \
+ if (!(cond)) { \
+ ut_failf(dms, __FILE__, __LINE__, __func__, #cond, \
+ fmt, ##args); \
+ return -1; \
+ }
+
+/* Assert that two int expressions are equal */
+#define ut_asserteq(expr1, expr2) { \
+ unsigned int val1 = (expr1), val2 = (expr2); \
+ \
+ if (val1 != val2) { \
+ ut_failf(dms, __FILE__, __LINE__, __func__, \
+ #expr1 " == " #expr2, \
+ "Expected %d, got %d", val1, val2); \
+ return -1; \
+ } \
+}
+
+/* Assert that two string expressions are equal */
+#define ut_asserteq_str(expr1, expr2) { \
+ const char *val1 = (expr1), *val2 = (expr2); \
+ \
+ if (strcmp(val1, val2)) { \
+ ut_failf(dms, __FILE__, __LINE__, __func__, \
+ #expr1 " = " #expr2, \
+ "Expected \"%s\", got \"%s\"", val1, val2); \
+ return -1; \
+ } \
+}
+
+/* Assert that two pointers are equal */
+#define ut_asserteq_ptr(expr1, expr2) { \
+ const void *val1 = (expr1), *val2 = (expr2); \
+ \
+ if (val1 != val2) { \
+ ut_failf(dms, __FILE__, __LINE__, __func__, \
+ #expr1 " = " #expr2, \
+ "Expected %p, got %p", val1, val2); \
+ return -1; \
+ } \
+}
+
+/* Assert that an operation succeeds (returns 0) */
+#define ut_assertok(cond) ut_asserteq(0, cond)
+
+#endif