[PATCH] ASoC: fsl_spdif: Add pm runtime function

[Nicolin Chen]

On Thu, Jun 18, 2020 at 07:55:34PM +0800, Shengjiu Wang wrote:
> Add pm runtime support and move clock handling there.
> Close the clocks at suspend to reduce the power consumption.
> 
> fsl_spdif_suspend is replaced by pm_runtime_force_suspend.
> fsl_spdif_resume is replaced by pm_runtime_force_resume.
> 
> Signed-off-by: Shengjiu Wang <shengjiu.wang at nxp.com>

LGTM, yet some nits, please add my ack after fixing:

Acked-by: Nicolin Chen <nicoleotsuka at gmail.com>

> @@ -495,25 +496,10 @@ static int fsl_spdif_startup(struct snd_pcm_substream *substream,

>  
> -disable_txclk:
> -	for (i--; i >= 0; i--)
> -		clk_disable_unprepare(spdif_priv->txclk[i]);
>  err:
> -	if (!IS_ERR(spdif_priv->spbaclk))
> -		clk_disable_unprepare(spdif_priv->spbaclk);
> -err_spbaclk:
> -	clk_disable_unprepare(spdif_priv->coreclk);
> -
>  	return ret;

Only "return ret;" remains now. We could clean the goto away.

> -static int fsl_spdif_resume(struct device *dev)
> +static int fsl_spdif_runtime_resume(struct device *dev)

> +disable_rx_clk:
> +	clk_disable_unprepare(spdif_priv->rxclk);
> +disable_tx_clk:
> +disable_spba_clk:

Why have two duplicated ones? Could probably drop the 2nd one.