diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
index 1c56f63524f27b2139860518f3ee672fdeef07cb..19faea2c31d17f960218eaa0b386d131aa8f57a8 100644
--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c
@@ -304,6 +304,9 @@ static int caam_probe(struct platform_device *pdev)
 			caam_remove(pdev);
 			return ret;
 		}
+
+		/* Enable RDB bit so that RNG works faster */
+		setbits32(&topregs->ctrl.scfgr, SCFGR_RDBENABLE);
 	}
 
 	/* NOTE: RTIC detection ought to go here, around Si time */
diff --git a/drivers/crypto/caam/regs.h b/drivers/crypto/caam/regs.h
index 3223fc6d647cd55c0367b5ee1f6b003bc8029080..cd6fedad9935983191217f227b11fa496dccc715 100644
--- a/drivers/crypto/caam/regs.h
+++ b/drivers/crypto/caam/regs.h
@@ -252,7 +252,8 @@ struct caam_ctrl {
 	/* Read/Writable					        */
 	u32 rsvd1;
 	u32 mcr;		/* MCFG      Master Config Register  */
-	u32 rsvd2[2];
+	u32 rsvd2;
+	u32 scfgr;		/* SCFGR, Security Config Register */
 
 	/* Bus Access Configuration Section			010-11f */
 	/* Read/Writable                                                */
@@ -299,6 +300,7 @@ struct caam_ctrl {
 #define MCFGR_WDFAIL		0x20000000 /* DECO watchdog force-fail */
 #define MCFGR_DMA_RESET		0x10000000
 #define MCFGR_LONG_PTR		0x00010000 /* Use >32-bit desc addressing */
+#define SCFGR_RDBENABLE		0x00000400
 
 /* AXI read cache control */
 #define MCFGR_ARCACHE_SHIFT	12