Subject: Re: [PATCH V1] ASoC: fsl_ssi: refine ipg clock usage in this module

From: Timur Tabi <[email-masked]>
Date: Tue, 09 Sep 2014 15:03:53 -0500

On 09/09/2014 02:59 PM, Nicolin Chen wrote:
> +	/*
> +	 * Initially mark the clock to NULL for all platforms so that later
> +	 * clk_prepare_enable() will ignore and return 0 for non-clock cases.
> +	 */
> +	ssi_private->clk = NULL;

According to Mark, NULL is a valid clock, so this should be instead:

	ssi_private->clk = PTR_ERR(-EINVAL);

although that doesn't sit well with me.