On Tue, May 31, 2016 at 09:02:22AM +0000, Kuninori Morimoto wrote:

> +	struct clk *clk;
> +	u32 val;
> +
> +	/*
> +	 * Parse dai->sysclk come from "clocks = <&xxx>"
> +	 * (if system has common clock)
> +	 *  or "system-clock-frequency = <xxx>"
> +	 *  or device's module clock.
> +	 */
> +	clk = of_clk_get(port_np, 0);
> +	if (!IS_ERR(clk)) {
> +		simple_dai->sysclk = clk_get_rate(clk);
> +		simple_dai->clk = clk;
> +	} else if (!of_property_read_u32(port_np, "system-clock-frequency", &val)) {
> +		simple_dai->sysclk = val;
> +	} else {
> +		clk = of_clk_get(endpoint_np, 0);
> +		if (!IS_ERR(clk))
> +			simple_dai->sysclk = clk_get_rate(clk);
> +	}

This looks like we're leaking the clocks - devm_ might help here
perhaps?