diff --git a/drivers/clk/tegra/clk-tegra20.c b/drivers/clk/tegra/clk-tegra20.c
index f08cffc..1be8c23 100644
--- a/drivers/clk/tegra/clk-tegra20.c
+++ b/drivers/clk/tegra/clk-tegra20.c
@@ -894,6 +894,14 @@ static void __init tegra20_periph_clk_init(void)
 	struct clk *clk;
 	int i;
 
+	/* ac97 */
+	clk = tegra_clk_register_periph_gate("ac97", "pll_a_out0",
+				    TEGRA_PERIPH_ON_APB,
+				    clk_base, 0, 3, &periph_l_regs,
+				    periph_clk_enb_refcnt);
+	clk_register_clkdev(clk, NULL, "tegra20-ac97");
+	clks[ac97] = clk;
+
 	/* apbdma */
 	clk = tegra_clk_register_periph_gate("apbdma", "pclk", 0, clk_base,
 				    0, 34, &periph_h_regs,