commit 3568459a51136f418ca8cad48a0db3803010148a
author Mans Rullgard <mans@mansr.com> Sun Jan 17 22:31:02 2016 +0000
committer Takashi Iwai <tiwai@suse.de> Wed Jan 20 09:59:27 2016 +0100
tree bd62b4fb29f83d30bfadf35137810686451096e7
parent c0bcdbdff3ff73a54161fca3cb8b6cdbd0bb8762

ALSA: at73c213: manage SSC clock

Since commit 49af54ff0fc7 ("misc: atmel-ssc: prepare clock only when
request") the SSC driver expects clients to manage the SSC clock.
This updates the at73c213 driver to enable the SSC clock whenever it is
needed.

Signed-off-by: Mans Rullgard <mans@mansr.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/spi/at73c213.c

diff --git a/sound/spi/at73c213.c b/sound/spi/at73c213.c
index 3952236..fac7e6e 100644
--- a/sound/spi/at73c213.c
+++ b/sound/spi/at73c213.c
@@ -221,6 +221,8 @@
 	runtime->hw = snd_at73c213_playback_hw;
 	chip->substream = substream;
 
+	clk_enable(chip->ssc->clk);
+
 	return 0;
 }
 
@@ -228,6 +230,7 @@
 {
 	struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
 	chip->substream = NULL;
+	clk_disable(chip->ssc->clk);
 	return 0;
 }
 
@@ -897,6 +900,8 @@
 	chip->card = card;
 	chip->irq = -1;
 
+	clk_enable(chip->ssc->clk);
+
 	retval = request_irq(irq, snd_at73c213_interrupt, 0, "at73c213", chip);
 	if (retval) {
 		dev_dbg(&chip->spi->dev, "unable to request irq %d\n", irq);
@@ -935,6 +940,8 @@
 	free_irq(chip->irq, chip);
 	chip->irq = -1;
 out:
+	clk_disable(chip->ssc->clk);
+
 	return retval;
 }
 
@@ -1012,7 +1019,9 @@
 	int retval;
 
 	/* Stop playback. */
+	clk_enable(chip->ssc->clk);
 	ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
+	clk_disable(chip->ssc->clk);
 
 	/* Mute sound. */
 	retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f);
@@ -1080,6 +1089,7 @@
 	struct snd_at73c213 *chip = card->private_data;
 
 	ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
+	clk_disable(chip->ssc->clk);
 	clk_disable(chip->board->dac_clk);
 
 	return 0;
@@ -1091,6 +1101,7 @@
 	struct snd_at73c213 *chip = card->private_data;
 
 	clk_enable(chip->board->dac_clk);
+	clk_enable(chip->ssc->clk);
 	ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
 
 	return 0;