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ASoC: pandora: Add DAC regulator support

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Pandora's external DAC is connected to VSIM TWL4030 supply, so let's
start switching it too to save more power.
Also DAC got it's own DAPM handler.

Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Grazvydas Ignotas 2010-02-05 16:29:53 +02:00 committed by Mark Brown
parent 4f2c120d18
commit c50749de02
1 changed files with 39 additions and 7 deletions
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46
sound/soc/omap/omap3pandora.c
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@ -23,6 +23,7 @@
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/regulator/consumer.h>
#include <sound/core.h>
#include <sound/pcm.h>
@ -40,6 +41,8 @@
#define PREFIX "ASoC omap3pandora: "
static struct regulator *omap3pandora_dac_reg;
static int omap3pandora_cmn_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params, unsigned int fmt)
{
@ -106,17 +109,33 @@ static int omap3pandora_in_hw_params(struct snd_pcm_substream *substream,
SND_SOC_DAIFMT_CBS_CFS);
}
static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *k, int event)
{
/*
* The PCM1773 DAC datasheet requires 1ms delay between switching
* VCC power on/off and /PD pin high/low
*/
if (SND_SOC_DAPM_EVENT_ON(event)) {
regulator_enable(omap3pandora_dac_reg);
mdelay(1);
gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
} else {
gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
mdelay(1);
regulator_disable(omap3pandora_dac_reg);
}
return 0;
}
static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *k, int event)
{
if (SND_SOC_DAPM_EVENT_ON(event)) {
gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
if (SND_SOC_DAPM_EVENT_ON(event))
gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
} else {
else
gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
mdelay(1);
gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
}
return 0;
}
@ -130,7 +149,9 @@ static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
* |P| <--- TWL4030 <--------- Line In and MICs
*/
static const struct snd_soc_dapm_widget omap3pandora_out_dapm_widgets[] = {
SND_SOC_DAPM_DAC("PCM DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
0, 0, omap3pandora_dac_event,
SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
0, 0, NULL, 0, omap3pandora_hp_event,
SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
@ -306,8 +327,18 @@ static int __init omap3pandora_soc_init(void)
goto fail2;
}
omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
if (IS_ERR(omap3pandora_dac_reg)) {
pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
dev_name(&omap3pandora_snd_device->dev),
PTR_ERR(omap3pandora_dac_reg));
goto fail3;
}
return 0;
fail3:
platform_device_del(omap3pandora_snd_device);
fail2:
platform_device_put(omap3pandora_snd_device);
fail1:
@ -320,6 +351,7 @@ module_init(omap3pandora_soc_init);
static void __exit omap3pandora_soc_exit(void)
{
regulator_put(omap3pandora_dac_reg);
platform_device_unregister(omap3pandora_snd_device);
gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);