diff --git a/board/firefly/firefly-rk3308/roc_cc_rk3308.c b/board/firefly/firefly-rk3308/roc_cc_rk3308.c
index 28dcc2a690..bdf3cc03dc 100644
--- a/board/firefly/firefly-rk3308/roc_cc_rk3308.c
+++ b/board/firefly/firefly-rk3308/roc_cc_rk3308.c
@@ -70,7 +70,7 @@ int rockchip_dnl_key_pressed(void)
 {
 	unsigned int val;
 
-	if (adc_channel_single_shot("saradc", 1, &val)) {
+	if (adc_channel_single_shot("saradc@ff1e0000", 1, &val)) {
 		printf("%s read adc key val failed\n", __func__);
 		return false;
 	}