random: add sys_rand8/16/64_get()

add sys_rand8_get(), sys_rand16_get() and sys_rand64_get()

Signed-off-by: Fin Maaß <f.maass@vogl-electronic.com>

include/zephyr/random/random.h

@@ -67,6 +67,42 @@ __syscall void sys_rand_get(void *dst, size_t len);
  */
 __syscall int sys_csrand_get(void *dst, size_t len);
 
+/**
+ * @brief Return a 8-bit random value that should pass general
+ * randomness tests.
+ *
+ * @note The random value returned is not a cryptographically secure
+ * random number value.
+ *
+ * @return 8-bit random value.
+ */
+static inline uint8_t sys_rand8_get(void)
+{
+	uint8_t ret;
+
+	sys_rand_get(&ret, sizeof(ret));
+
+	return ret;
+}
+
+/**
+ * @brief Return a 16-bit random value that should pass general
+ * randomness tests.
+ *
+ * @note The random value returned is not a cryptographically secure
+ * random number value.
+ *
+ * @return 16-bit random value.
+ */
+static inline uint16_t sys_rand16_get(void)
+{
+	uint16_t ret;
+
+	sys_rand_get(&ret, sizeof(ret));
+
+	return ret;
+}
+
 /**
  * @brief Return a 32-bit random value that should pass general
  * randomness tests.
@@ -85,6 +121,23 @@ static inline uint32_t sys_rand32_get(void)
 	return ret;
 }
 
+/**
+ * @brief Return a 64-bit random value that should pass general
+ * randomness tests.
+ *
+ * @note The random value returned is not a cryptographically secure
+ * random number value.
+ *
+ * @return 64-bit random value.
+ */
+static inline uint64_t sys_rand64_get(void)
+{
+	uint64_t ret;
+
+	sys_rand_get(&ret, sizeof(ret));
+
+	return ret;
+}
 
 #ifdef __cplusplus
 }