diff --git a/drivers/clk/aspeed/clk_ast2500.c b/drivers/clk/aspeed/clk_ast2500.c
index a1b4496ca2..dcf299548d 100644
--- a/drivers/clk/aspeed/clk_ast2500.c
+++ b/drivers/clk/aspeed/clk_ast2500.c
@@ -173,6 +173,7 @@ static ulong ast2500_clk_get_rate(struct clk *clk)
 		rate = ast2500_get_uart_clk_rate(priv->scu, 5);
 		break;
 	default:
+		debug("%s: unknown clk %ld\n", __func__, clk->id);
 		return -ENOENT;
 	}
 
@@ -438,6 +439,7 @@ static ulong ast2500_clk_set_rate(struct clk *clk, ulong rate)
 		new_rate = ast2500_configure_d2pll(priv->scu, rate);
 		break;
 	default:
+		debug("%s: unknown clk %ld\n", __func__, clk->id);
 		return -ENOENT;
 	}
 
@@ -480,6 +482,7 @@ static int ast2500_clk_enable(struct clk *clk)
 		ast2500_configure_d2pll(priv->scu, D2PLL_DEFAULT_RATE);
 		break;
 	default:
+		debug("%s: unknown clk %ld\n", __func__, clk->id);
 		return -ENOENT;
 	}
 
diff --git a/drivers/clk/aspeed/clk_ast2600.c b/drivers/clk/aspeed/clk_ast2600.c
index f191b0f317..7d85c7f098 100644
--- a/drivers/clk/aspeed/clk_ast2600.c
+++ b/drivers/clk/aspeed/clk_ast2600.c
@@ -471,7 +471,7 @@ static ulong ast2600_clk_get_rate(struct clk *clk)
 		rate = ast2600_get_uart_huxclk_rate(priv->scu);
 		break;
 	default:
-		debug("can't get clk rate\n");
+		debug("%s: unknown clk %ld\n", __func__, clk->id);
 		return -ENOENT;
 	}
 
@@ -1098,7 +1098,7 @@ static int ast2600_clk_enable(struct clk *clk)
 		ast2600_enable_rsaclk(priv->scu);
 		break;
 	default:
-		pr_err("can't enable clk\n");
+		debug("%s: unknown clk %ld\n", __func__, clk->id);
 		return -ENOENT;
 	}