diff --git a/examples/platforms/efr32/src/entropy.c b/examples/platforms/efr32/src/entropy.c
index 64b19aadc..3a755e156 100644
--- a/examples/platforms/efr32/src/entropy.c
+++ b/examples/platforms/efr32/src/entropy.c
@@ -33,29 +33,25 @@
  */
 
 #include <openthread/platform/entropy.h>
-
 #include "mbedtls/entropy_poll.h"
 #include "utils/code_utils.h"
 
-static uint32_t randomUint32Get(void)
-{
-    uint32_t random   = 0;
-    size_t   ouputLen = 0;
-
-    mbedtls_hardware_poll(NULL, (unsigned char *)&random, sizeof(random), &ouputLen);
-
-    return random;
-}
-
 otError otPlatEntropyGet(uint8_t *aOutput, uint16_t aOutputLength)
 {
-    otError error = OT_ERROR_NONE;
+    otError error     = OT_ERROR_NONE;
+    size_t  outputLen = 0;
 
     otEXPECT_ACTION(aOutput, error = OT_ERROR_INVALID_ARGS);
 
-    for (uint16_t length = 0; length < aOutputLength; length++)
+    for (size_t partialLen = 0; outputLen < aOutputLength; outputLen += partialLen)
     {
-        aOutput[length] = (uint8_t)randomUint32Get();
+        const uint16_t remaining = aOutputLength - outputLen;
+        partialLen               = 0;
+
+        // Non-zero return values for mbedtls_hardware_poll() signify an error has occurred
+        otEXPECT_ACTION(0 == mbedtls_hardware_poll(NULL, &aOutput[outputLen], remaining, &partialLen),
+                        error = OT_ERROR_FAILED);
+        otEXPECT_ACTION(partialLen > 0, error = OT_ERROR_FAILED);
     }
 
 exit: