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ASoC: pcm3008: Manage DAC and ADC power with DAPM 

Rather than leaving the DAC and ADC active whenever the system is running
manage their power with DAPM.

Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Mark Brown 2013-08-15 12:04:28 +01:00
parent faaf36f216
commit 4fc932c6d8
1 changed files with 39 additions and 33 deletions
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72
sound/soc/codecs/pcm3008.c
View File

@ -28,20 +28,53 @@
#include "pcm3008.h" #include "pcm3008.h"
static int pcm3008_dac_ev(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol,
int event)
{
struct snd_soc_codec *codec = w->codec;
struct pcm3008_setup_data *setup = codec->dev->platform_data;
gpio_set_value_cansleep(setup->pdda_pin,
SND_SOC_DAPM_EVENT_ON(event));
return 0;
}
static int pcm3008_adc_ev(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol,
int event)
{
struct snd_soc_codec *codec = w->codec;
struct pcm3008_setup_data *setup = codec->dev->platform_data;
gpio_set_value_cansleep(setup->pdad_pin,
SND_SOC_DAPM_EVENT_ON(event));
return 0;
}
static const struct snd_soc_dapm_widget pcm3008_dapm_widgets[] = { static const struct snd_soc_dapm_widget pcm3008_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("VINL"), SND_SOC_DAPM_INPUT("VINL"),
SND_SOC_DAPM_INPUT("VINR"), SND_SOC_DAPM_INPUT("VINR"),
SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, pcm3008_dac_ev,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_ADC_E("ADC", NULL, SND_SOC_NOPM, 0, 0, pcm3008_adc_ev,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_OUTPUT("VOUTL"), SND_SOC_DAPM_OUTPUT("VOUTL"),
SND_SOC_DAPM_OUTPUT("VOUTR"), SND_SOC_DAPM_OUTPUT("VOUTR"),
}; };
static const struct snd_soc_dapm_route pcm3008_dapm_routes[] = { static const struct snd_soc_dapm_route pcm3008_dapm_routes[] = {
{ "PCM3008 Capture", NULL, "VINL" }, { "PCM3008 Capture", NULL, "ADC" },
{ "PCM3008 Capture", NULL, "VINR" }, { "ADC", NULL, "VINL" },
{ "ADC", NULL, "VINR" },
{ "VOUTL", NULL, "PCM3008 Playback" }, { "DAC", NULL, "PCM3008 Playback" },
{ "VOUTR", NULL, "PCM3008 Playback" }, { "VOUTL", NULL, "DAC" },
{ "VOUTR", NULL, "DAC" },
}; };
#define PCM3008_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ #define PCM3008_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
@ -65,34 +98,7 @@ static struct snd_soc_dai_driver pcm3008_dai = {
}, },
}; };
#ifdef CONFIG_PM
static int pcm3008_soc_suspend(struct snd_soc_codec *codec)
{
struct pcm3008_setup_data *setup = codec->dev->platform_data;
gpio_set_value_cansleep(setup->pdad_pin, 0);
gpio_set_value_cansleep(setup->pdda_pin, 0);
return 0;
}
static int pcm3008_soc_resume(struct snd_soc_codec *codec)
{
struct pcm3008_setup_data *setup = codec->dev->platform_data;
gpio_set_value_cansleep(setup->pdad_pin, 1);
gpio_set_value_cansleep(setup->pdda_pin, 1);
return 0;
}
#else
#define pcm3008_soc_suspend NULL
#define pcm3008_soc_resume NULL
#endif
static struct snd_soc_codec_driver soc_codec_dev_pcm3008 = { static struct snd_soc_codec_driver soc_codec_dev_pcm3008 = {
.suspend = pcm3008_soc_suspend,
.resume = pcm3008_soc_resume,
.dapm_widgets = pcm3008_dapm_widgets, .dapm_widgets = pcm3008_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(pcm3008_dapm_widgets), .num_dapm_widgets = ARRAY_SIZE(pcm3008_dapm_widgets),
.dapm_routes = pcm3008_dapm_routes, .dapm_routes = pcm3008_dapm_routes,
@ -128,13 +134,13 @@ static int pcm3008_codec_probe(struct platform_device *pdev)
/* Configure PDAD GPIO. */ /* Configure PDAD GPIO. */
ret = devm_gpio_request_one(&pdev->dev, setup->pdad_pin, ret = devm_gpio_request_one(&pdev->dev, setup->pdad_pin,
GPIOF_OUT_INIT_HIGH, "codec_pdad"); GPIOF_OUT_INIT_LOW, "codec_pdad");
if (ret != 0) if (ret != 0)
return ret; return ret;
/* Configure PDDA GPIO. */ /* Configure PDDA GPIO. */
ret = devm_gpio_request_one(&pdev->dev, setup->pdda_pin, ret = devm_gpio_request_one(&pdev->dev, setup->pdda_pin,
GPIOF_OUT_INIT_HIGH, "codec_pdda"); GPIOF_OUT_INIT_LOW, "codec_pdda");
if (ret != 0) if (ret != 0)
return ret; return ret;