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Commit cbaadf0f authored by Bo Shen's avatar Bo Shen Committed by Mark Brown
Browse files

ASoC: atmel_ssc_dai: refactor the startup and shutdown 



In startup function, enable ssc clock and in shutdown function,
disable clock. And also remove disable ssc in shutdown function,
as ssc is disabled in prepare function.

Signed-off-by: default avatarBo Shen <voice.shen@atmel.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent eb527149

sound/soc/atmel/atmel_ssc_dai.c

+11 −17
Original line number Diff line number Diff line
@@ -204,6 +204,13 @@ static int atmel_ssc_startup(struct snd_pcm_substream *substream, 
	pr_debug("atmel_ssc_startup: SSC_SR=0x%u\n",

		ssc_readl(ssc_p->ssc->regs, SR));



	/* Enable PMC peripheral clock for this SSC */

	pr_debug("atmel_ssc_dai: Starting clock\n");

	clk_enable(ssc_p->ssc->clk);



	/* Reset the SSC to keep it at a clean status */

	ssc_writel(ssc_p->ssc->regs, CR, SSC_BIT(CR_SWRST));



	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {

		dir = 0;

		dir_mask = SSC_DIR_MASK_PLAYBACK;
@@ -250,11 +257,6 @@ static void atmel_ssc_shutdown(struct snd_pcm_substream *substream, 
	dma_params = ssc_p->dma_params[dir];



	if (dma_params != NULL) {

		ssc_writel(ssc_p->ssc->regs, CR, dma_params->mask->ssc_disable);

		pr_debug("atmel_ssc_shutdown: %s disabled SSC_SR=0x%08x\n",

			(dir ? "receive" : "transmit"),

			ssc_readl(ssc_p->ssc->regs, SR));



		dma_params->ssc = NULL;

		dma_params->substream = NULL;

		ssc_p->dma_params[dir] = NULL;
@@ -266,10 +268,6 @@ static void atmel_ssc_shutdown(struct snd_pcm_substream *substream, 
	ssc_p->dir_mask &= ~dir_mask;

	if (!ssc_p->dir_mask) {

		if (ssc_p->initialized) {

			/* Shutdown the SSC clock. */

			pr_debug("atmel_ssc_dai: Stopping clock\n");

			clk_disable(ssc_p->ssc->clk);



			free_irq(ssc_p->ssc->irq, ssc_p);

			ssc_p->initialized = 0;

		}
@@ -280,6 +278,10 @@ static void atmel_ssc_shutdown(struct snd_pcm_substream *substream, 
		ssc_p->cmr_div = ssc_p->tcmr_period = ssc_p->rcmr_period = 0;

	}

	spin_unlock_irq(&ssc_p->lock);



	/* Shutdown the SSC clock. */

	pr_debug("atmel_ssc_dai: Stopping clock\n");

	clk_disable(ssc_p->ssc->clk);

}
@@ -625,14 +627,6 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream, 
			rcmr, rfmr, tcmr, tfmr);



	if (!ssc_p->initialized) {



		/* Enable PMC peripheral clock for this SSC */

		pr_debug("atmel_ssc_dai: Starting clock\n");

		clk_enable(ssc_p->ssc->clk);



		/* Reset the SSC and its PDC registers */

		ssc_writel(ssc_p->ssc->regs, CR, SSC_BIT(CR_SWRST));



		ssc_writel(ssc_p->ssc->regs, PDC_RPR, 0);

		ssc_writel(ssc_p->ssc->regs, PDC_RCR, 0);

		ssc_writel(ssc_p->ssc->regs, PDC_RNPR, 0);