1 files changed, 43 insertions, 0 deletions
diff --git a/roms/u-boot/include/rng.h b/roms/u-boot/include/rng.h
new file mode 100644
index 000000000..37af55436
--- /dev/null
+++ b/roms/u-boot/include/rng.h
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2019, Linaro Limited
+ */
+
+#if !defined _RNG_H_
+#define _RNG_H_
+
+struct udevice;
+
+/**
+ * dm_rng_read() - read a random number seed from the rng device
+ *
+ * The function blocks until the requested number of bytes is read.
+ *
+ * @dev:	random number generator device
+ * @buffer:	input buffer to put the read random seed into
+ * @size:	number of random bytes to read
+ * Return:	0 if OK, -ve on error
+ */
+int dm_rng_read(struct udevice *dev, void *buffer, size_t size);
+
+/**
+ * struct dm_rng_ops - operations for the hwrng uclass
+ *
+ * This structures contains the function implemented by a hardware random
+ * number generation device.
+ */
+struct dm_rng_ops {
+	/**
+	 * @read:	read a random bytes
+	 *
+	 * The function blocks until the requested number of bytes is read.
+	 *
+	 * @read.dev:		random number generator device
+	 * @read.data:		input buffer to read the random seed into
+	 * @read.max:		number of random bytes to read
+	 * @read.Return:	0 if OK, -ve on error
+	 */
+	int (*read)(struct udevice *dev, void *data, size_t max);
+};
+
+#endif /* _RNG_H_ */