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Commit 5cd919a2 authored by Graeme Gregory's avatar Graeme Gregory Committed by Jaroslav Kysela
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[ALSA] soc - Support suspend and resume of the I2S interface on s3c24xx 




Signed-off-by: default avatarGraeme Gregory <graeme@openmoko.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarJaroslav Kysela <perex@perex.cz>
parent 96d90e19

sound/soc/s3c24xx/s3c24xx-i2s.c

+38 −0
Original line number Diff line number Diff line
@@ -76,6 +76,10 @@ static struct s3c24xx_pcm_dma_params s3c24xx_i2s_pcm_stereo_in = { 
struct s3c24xx_i2s_info {

	void __iomem	*regs;

	struct clk	*iis_clk;

	u32		iiscon;

	u32		iismod;

	u32		iisfcon;

	u32		iispsr;

};

static struct s3c24xx_i2s_info s3c24xx_i2s;
@@ -406,6 +410,38 @@ static int s3c24xx_i2s_probe(struct platform_device *pdev) 
	return 0;

}



#ifdef CONFIG_PM

int s3c24xx_i2s_suspend(struct platform_device *pdev,

		struct snd_soc_cpu_dai *cpu_dai)

{

	s3c24xx_i2s.iiscon = readl(s3c24xx_i2s.regs + S3C2410_IISCON);

	s3c24xx_i2s.iismod = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);

	s3c24xx_i2s.iisfcon = readl(s3c24xx_i2s.regs + S3C2410_IISFCON);

	s3c24xx_i2s.iispsr = readl(s3c24xx_i2s.regs + S3C2410_IISPSR);



	clk_disable(s3c24xx_i2s.iis_clk);



	return 0;

}



int s3c24xx_i2s_resume(struct platform_device *pdev,

		struct snd_soc_cpu_dai *cpu_dai)

{

	clk_enable(s3c24xx_i2s.iis_clk);



	writel(s3c24xx_i2s.iiscon, s3c24xx_i2s.regs + S3C2410_IISCON);

	writel(s3c24xx_i2s.iismod, s3c24xx_i2s.regs + S3C2410_IISMOD);

	writel(s3c24xx_i2s.iisfcon, s3c24xx_i2s.regs + S3C2410_IISFCON);

	writel(s3c24xx_i2s.iispsr, s3c24xx_i2s.regs + S3C2410_IISPSR);



	return 0;

}

#else

#define s3c24xx_i2s_suspend NULL

#define s3c24xx_i2s_resume NULL

#endif





#define S3C24XX_I2S_RATES \

	(SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \

	SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
@@ -416,6 +452,8 @@ struct snd_soc_cpu_dai s3c24xx_i2s_dai = { 
	.id = 0,

	.type = SND_SOC_DAI_I2S,

	.probe = s3c24xx_i2s_probe,

	.suspend = s3c24xx_i2s_suspend,

	.resume = s3c24xx_i2s_resume,

	.playback = {

		.channels_min = 2,

		.channels_max = 2,