diff --git a/drivers/pwm/pwm-loongson.c b/drivers/pwm/pwm-loongson.c
index 278325dc9..c29f9d062 100644
--- a/drivers/pwm/pwm-loongson.c
+++ b/drivers/pwm/pwm-loongson.c
@@ -315,9 +315,13 @@ static int pwm_loongson_probe(struct platform_device *pdev)
 	if (ddata->clk) {
 		ret = devm_clk_rate_exclusive_get(dev, ddata->clk);
 		if (ret)
-			return ret;
+			return dev_err_probe(dev, ret,
+						"Failed to get exclusive rate\n");
 
 		ddata->clk_rate = clk_get_rate(ddata->clk);
+		if (!ddata->clk_rate)
+			return dev_err_probe(dev, -EINVAL,
+						"Failed to get frequency\n");
 	} else {
 #ifdef CONFIG_OF
 		if (!of_property_read_u32(np, "clock-frequency", &of_clk_freq))