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[ALSA] soc - Support suspend and resume of the I2S interface on s3c24xx 

Signed-off-by: Graeme Gregory <graeme@openmoko.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Graeme Gregory 2008-01-10 14:44:58 +01:00 committed by Jaroslav Kysela
parent 96d90e1930
commit 5cd919a214
1 changed files with 38 additions and 0 deletions
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38
sound/soc/s3c24xx/s3c24xx-i2s.c
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@ -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,