diff --git a/drivers/spi/renesas_rpc_spi.c b/drivers/spi/renesas_rpc_spi.c
index 07ff2d29fd..af1b368f69 100644
--- a/drivers/spi/renesas_rpc_spi.c
+++ b/drivers/spi/renesas_rpc_spi.c
@@ -140,6 +140,7 @@
 #define PRC_PHYCNT_EXDS		BIT(21)
 #define RPC_PHYCNT_OCT		BIT(20)
 #define RPC_PHYCNT_STRTIM(v)	(((v) & 0x7) << 15)
+#define RPC_PHYCNT_STRTIM2(v)	((((v) & 0x7) << 15) | (((v) & 0x8) << 24))
 #define RPC_PHYCNT_WBUF2	BIT(4)
 #define RPC_PHYCNT_WBUF		BIT(2)
 #define RPC_PHYCNT_MEM(v)	(((v) & 0x3) << 0)
@@ -212,9 +213,13 @@ static u32 rpc_spi_get_strobe_delay(void)
 	 *       0: On H3 ES1.x (not supported in mainline U-Boot)
 	 *       6: On M3 ES1.x
 	 *       7: On other R-Car Gen3
+	 *      15: On R-Car Gen4
 	 */
 	if (cpu_type == RMOBILE_CPU_TYPE_R8A7796 && rmobile_get_cpu_rev_integer() == 1)
 		return RPC_PHYCNT_STRTIM(6);
+	else if (cpu_type == RMOBILE_CPU_TYPE_R8A779F0 ||
+		 cpu_type == RMOBILE_CPU_TYPE_R8A779G0)
+		return RPC_PHYCNT_STRTIM2(15);
 	else
 #endif
 		return RPC_PHYCNT_STRTIM(7);