hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

ASoC: pandora: Add DAC regulator support 

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
sound/soc/omap/omap3pandora.c
View File

@ -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);