MIMXRT1050_EVK: Add TRNG support

Signed-off-by: Mahesh Mahadevan <[email protected]>

Author: mmahadevan108

targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_IMX/trng_api.c

@@ -0,0 +1,54 @@
+/*
+ *  Hardware entropy collector for the K66F, using Freescale's RNGA
+ *
+ *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ */
+
+/*
+ * Reference: "K66 Sub-Family Reference Manual, Rev. 2", chapter 38
+ */
+
+#include <stdlib.h>
+#include "cmsis.h"
+#include "fsl_trng.h"
+#include "trng_api.h"
+
+void trng_init(trng_t *obj)
+{
+    (void)obj;
+    trng_config_t trngConfig;
+    TRNG_GetDefaultConfig(&trngConfig);
+    TRNG_Init(TRNG, &trngConfig);
+}
+
+void trng_free(trng_t *obj)
+{
+    (void)obj;
+    TRNG_Deinit(TRNG);
+}
+
+int trng_get_bytes(trng_t *obj, uint8_t *output, size_t length, size_t *output_length)
+{
+    (void)obj;
+
+    if(TRNG_GetRandomData(TRNG, output, length) != kStatus_Success) {
+        return -1;
+    }
+    *output_length = length;
+
+    return 0;
+}

targets/targets.json

@@ -1955,7 +1955,8 @@
             "SERIAL",
             "SPI",
             "SPISLAVE",
-            "STDIO_MESSAGES"
+            "STDIO_MESSAGES",
+            "TRNG"
         ],
         "release_versions": ["2", "5"],
         "features": ["LWIP"],