From 3568459a51136f418ca8cad48a0db3803010148a Mon Sep 17 00:00:00 2001 From: Mans Rullgard Date: Sun, 17 Jan 2016 22:31:02 +0000 Subject: [PATCH] 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 Signed-off-by: Takashi Iwai --- sound/spi/at73c213.c | 11 +++++++++++ 1 file changed, 11 insertions(+) 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 @@ static int snd_at73c213_dev_init(struct snd_card *card, 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;