diff --git a/drivers/clk/rockchip/clk-px30.c b/drivers/clk/rockchip/clk-px30.c
index 46e2bcf044b5..56e78c22d9fb 100644
--- a/drivers/clk/rockchip/clk-px30.c
+++ b/drivers/clk/rockchip/clk-px30.c
@@ -951,7 +951,7 @@ static struct rockchip_clk_branch px30_clk_pmu_branches[] __initdata = {
 	COMPOSITE_FRACMUX(0, "clk_uart0_frac", "clk_uart0_pmu_src", CLK_SET_RATE_PARENT,
 			PX30_PMU_CLKSEL_CON(5), 0,
 			PX30_PMU_CLKGATE_CON(1), 2, GFLAGS,
-			&px30_uart0_pmu_fracmux, 0),
+			&px30_uart0_pmu_fracmux, PX30_FRAC_MAX_PRATE),
 	GATE(SCLK_UART0_PMU, "clk_uart0_pmu", "clk_uart0_pmu_mux", CLK_SET_RATE_PARENT,
 			PX30_PMU_CLKGATE_CON(1), 3, GFLAGS),