--- zzzz-none-000/linux-4.1.52/drivers/char/hw_random/iproc-rng200.c	2018-05-28 02:26:45.000000000 +0000
+++ bcm63-7530ax-731/linux-4.1.52/drivers/char/hw_random/iproc-rng200.c	2022-03-02 11:37:12.000000000 +0000
@@ -143,9 +143,12 @@
 			if (!wait)
 				/* Cannot wait, return immediately */
 				return max - num_remaining;
-
+#if defined(CONFIG_BCM_KF_HWRNG)
+			udelay(20);
+#else			
 			/* Can wait, give others chance to run */
 			usleep_range(min(num_remaining * 10, 500U), 500);
+#endif			
 		}
 	}
 
@@ -206,6 +209,9 @@
 	priv->rng.read = iproc_rng200_read,
 	priv->rng.init = iproc_rng200_init,
 	priv->rng.cleanup = iproc_rng200_cleanup,
+#if defined(CONFIG_BCM_KF_HWRNG)
+	priv->rng.quality = 1024,
+#endif /* BCM_KF_HWRNG */
 
 	/* Register driver */
 	ret = devm_hwrng_register(dev, &priv->rng);
@@ -214,7 +220,7 @@
 		return ret;
 	}
 
-	dev_info(dev, "hwrng registered\n");
+	dev_info(dev,"hwrng registered\n");
 
 	return 0;
 }