diff --git a/drivers/clk/rockchip/clk-ddr.c b/drivers/clk/rockchip/clk-ddr.c
index c2cb6c937cd4..41877f5177c3 100644
--- a/drivers/clk/rockchip/clk-ddr.c
+++ b/drivers/clk/rockchip/clk-ddr.c
@@ -102,7 +102,10 @@ static int rockchip_ddrclk_sip_set_rate(struct clk_hw *hw, unsigned long drate,
 		      ROCKCHIP_SIP_CONFIG_DRAM_SET_RATE,
 		      0, 0, 0, 0, &res);
 
-	return res.a0;
+	if (res.a0)
+		return 0;
+	else
+		return -EPERM;
 }
 
 static unsigned long