diff --git a/sound/soc/kirkwood/kirkwood-i2s.c b/sound/soc/kirkwood/kirkwood-i2s.c
index e6027fd5b29c240887e4036e7debdaff4c3b3c7a..ba720399536934d6df8f82e2266cd1bbb600d03d 100644
--- a/sound/soc/kirkwood/kirkwood-i2s.c
+++ b/sound/soc/kirkwood/kirkwood-i2s.c
@@ -102,14 +102,16 @@ static void kirkwood_set_rate(struct snd_soc_dai *dai,
 	uint32_t clks_ctrl;
 
 	if (rate == 44100 || rate == 48000 || rate == 96000) {
-		/* use internal dco for supported rates */
+		/* use internal dco for the supported rates
+		 * defined in kirkwood_i2s_dai */
 		dev_dbg(dai->dev, "%s: dco set rate = %lu\n",
 			__func__, rate);
 		kirkwood_set_dco(priv->io, rate);
 
 		clks_ctrl = KIRKWOOD_MCLK_SOURCE_DCO;
-	} else if (!IS_ERR(priv->extclk)) {
-		/* use optional external clk for other rates */
+	} else {
+		/* use the external clock for the other rates
+		 * defined in kirkwood_i2s_dai_extclk */
 		dev_dbg(dai->dev, "%s: extclk set rate = %lu -> %lu\n",
 			__func__, rate, 256 * rate);
 		clk_set_rate(priv->extclk, 256 * rate);