diff --git a/drivers/iio/adc/rockchip_saradc.c b/drivers/iio/adc/rockchip_saradc.c
index 1fad964..e074a0b 100644
--- a/drivers/iio/adc/rockchip_saradc.c
+++ b/drivers/iio/adc/rockchip_saradc.c
@@ -141,7 +141,6 @@
 	struct resource	*mem;
 	int ret;
 	int irq;
-	u32 rate;
 
 	if (!np)
 		return -ENODEV;