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>

1 files changed, 11 insertions, 0 deletions

diff --git a/sound/spi/at73c213.c b/sound/spi/at73c213.c
index 39522367897c..fac7e6eb9529 100644
--- a/sound/spi/at73c213.c
+++ b/sound/spi/at73c213.c
@@ -221,6 +221,8 @@ static int snd_at73c213_pcm_open(struct snd_pcm_substream *substream)
         runtime->hw = snd_at73c213_playback_hw;
         chip->substream = substream;
 
+        clk_enable(chip->ssc->clk);
+
         return 0;
 }
 
@@ -228,6 +230,7 @@ static int snd_at73c213_pcm_close(struct snd_pcm_substream *substream)
 {
         struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
         chip->substream = NULL;
+        clk_disable(chip->ssc->clk);
         return 0;
 }
 
@@ -897,6 +900,8 @@ static int snd_at73c213_dev_init(struct snd_card *card,
         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 @@ out_irq:
         free_irq(chip->irq, chip);
         chip->irq = -1;
 out:
+        clk_disable(chip->ssc->clk);
+
         return retval;
 }
 
@@ -1012,7 +1019,9 @@ static int snd_at73c213_remove(struct spi_device *spi)
         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 @@ static int snd_at73c213_suspend(struct device *dev)
         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 @@ static int snd_at73c213_resume(struct device *dev)
         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;