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ASoC: Regulator support for WM8580

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Add basic support for integration with the regulator API to WM8580.
Since the core cannot yet disable biases when the CODEC is idle we
simply request and enable the regulators for the entire time the
driver is active.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2009-06-17 17:30:14 +01:00
parent 1abd918499
commit a583cd5347
1 changed files with 35 additions and 3 deletions
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38
sound/soc/codecs/wm8580.c
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@ -24,6 +24,8 @@
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
@ -187,15 +189,22 @@ struct pll_state {
unsigned int out;
};
#define WM8580_NUM_SUPPLIES 3
static const char *wm8580_supply_names[WM8580_NUM_SUPPLIES] = {
"AVDD",
"DVDD",
"PVDD",
};
/* codec private data */
struct wm8580_priv {
struct snd_soc_codec codec;
struct regulator_bulk_data supplies[WM8580_NUM_SUPPLIES];
u16 reg_cache[WM8580_MAX_REGISTER + 1];
struct pll_state a;
struct pll_state b;
};
/*
* read wm8580 register cache
*/
@ -922,11 +931,28 @@ static int wm8580_register(struct wm8580_priv *wm8580)
memcpy(codec->reg_cache, wm8580_reg, sizeof(wm8580_reg));
for (i = 0; i < ARRAY_SIZE(wm8580->supplies); i++)
wm8580->supplies[i].supply = wm8580_supply_names[i];
ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8580->supplies),
wm8580->supplies);
if (ret != 0) {
dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
goto err;
}
ret = regulator_bulk_enable(ARRAY_SIZE(wm8580->supplies),
wm8580->supplies);
if (ret != 0) {
dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
goto err_regulator_get;
}
/* Get the codec into a known state */
ret = wm8580_write(codec, WM8580_RESET, 0);
if (ret != 0) {
dev_err(codec->dev, "Failed to reset codec: %d\n", ret);
goto err;
goto err_regulator_enable;
}
for (i = 0; i < ARRAY_SIZE(wm8580_dai); i++)
@ -939,7 +965,7 @@ static int wm8580_register(struct wm8580_priv *wm8580)
ret = snd_soc_register_codec(codec);
if (ret != 0) {
dev_err(codec->dev, "Failed to register codec: %d\n", ret);
goto err;
goto err_regulator_enable;
}
ret = snd_soc_register_dais(wm8580_dai, ARRAY_SIZE(wm8580_dai));
@ -952,6 +978,10 @@ static int wm8580_register(struct wm8580_priv *wm8580)
err_codec:
snd_soc_unregister_codec(codec);
err_regulator_enable:
regulator_bulk_disable(ARRAY_SIZE(wm8580->supplies), wm8580->supplies);
err_regulator_get:
regulator_bulk_free(ARRAY_SIZE(wm8580->supplies), wm8580->supplies);
err:
kfree(wm8580);
return ret;
@ -962,6 +992,8 @@ static void wm8580_unregister(struct wm8580_priv *wm8580)
wm8580_set_bias_level(&wm8580->codec, SND_SOC_BIAS_OFF);
snd_soc_unregister_dais(wm8580_dai, ARRAY_SIZE(wm8580_dai));
snd_soc_unregister_codec(&wm8580->codec);
regulator_bulk_disable(ARRAY_SIZE(wm8580->supplies), wm8580->supplies);
regulator_bulk_free(ARRAY_SIZE(wm8580->supplies), wm8580->supplies);
kfree(wm8580);
wm8580_codec = NULL;
}