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Diffstat (limited to 'sound/soc/codecs/wm8971.c')
-rw-r--r--sound/soc/codecs/wm8971.c99
1 files changed, 30 insertions, 69 deletions
diff --git a/sound/soc/codecs/wm8971.c b/sound/soc/codecs/wm8971.c
index 39ddb9b8834c..f9cbabdc6238 100644
--- a/sound/soc/codecs/wm8971.c
+++ b/sound/soc/codecs/wm8971.c
@@ -31,11 +31,11 @@
#define WM8971_REG_COUNT 43
-static struct workqueue_struct *wm8971_workq = NULL;
-
/* codec private data */
struct wm8971_priv {
unsigned int sysclk;
+ struct delayed_work charge_work;
+ struct regmap *regmap;
};
/*
@@ -552,9 +552,19 @@ static int wm8971_mute(struct snd_soc_dai *dai, int mute)
return 0;
}
+static void wm8971_charge_work(struct work_struct *work)
+{
+ struct wm8971_priv *wm8971 =
+ container_of(work, struct wm8971_priv, charge_work.work);
+
+ /* Set to 500k */
+ regmap_update_bits(wm8971->regmap, WM8971_PWR1, 0x0180, 0x0100);
+}
+
static int wm8971_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
+ struct wm8971_priv *wm8971 = snd_soc_codec_get_drvdata(codec);
u16 pwr_reg = snd_soc_read(codec, WM8971_PWR1) & 0xfe3e;
switch (level) {
@@ -563,15 +573,24 @@ static int wm8971_set_bias_level(struct snd_soc_codec *codec,
snd_soc_write(codec, WM8971_PWR1, pwr_reg | 0x00c1);
break;
case SND_SOC_BIAS_PREPARE:
+ /* Wait until fully charged */
+ flush_delayed_work(&wm8971->charge_work);
break;
case SND_SOC_BIAS_STANDBY:
- if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
+ if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
snd_soc_cache_sync(codec);
+ /* charge output caps - set vmid to 5k for quick power up */
+ snd_soc_write(codec, WM8971_PWR1, pwr_reg | 0x01c0);
+ queue_delayed_work(system_power_efficient_wq,
+ &wm8971->charge_work, msecs_to_jiffies(1000));
+ } else {
+ /* mute dac and set vmid to 500k, enable VREF */
+ snd_soc_write(codec, WM8971_PWR1, pwr_reg | 0x0140);
+ }
- /* mute dac and set vmid to 500k, enable VREF */
- snd_soc_write(codec, WM8971_PWR1, pwr_reg | 0x0140);
break;
case SND_SOC_BIAS_OFF:
+ cancel_delayed_work_sync(&wm8971->charge_work);
snd_soc_write(codec, WM8971_PWR1, 0x0001);
break;
}
@@ -610,58 +629,14 @@ static struct snd_soc_dai_driver wm8971_dai = {
.ops = &wm8971_dai_ops,
};
-static void wm8971_work(struct work_struct *work)
-{
- struct snd_soc_dapm_context *dapm =
- container_of(work, struct snd_soc_dapm_context,
- delayed_work.work);
- struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
- wm8971_set_bias_level(codec, codec->dapm.bias_level);
-}
-
-static int wm8971_suspend(struct snd_soc_codec *codec)
-{
- wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF);
- return 0;
-}
-
-static int wm8971_resume(struct snd_soc_codec *codec)
-{
- u16 reg;
-
- wm8971_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
-
- /* charge wm8971 caps */
- if (codec->dapm.suspend_bias_level == SND_SOC_BIAS_ON) {
- reg = snd_soc_read(codec, WM8971_PWR1) & 0xfe3e;
- snd_soc_write(codec, WM8971_PWR1, reg | 0x01c0);
- codec->dapm.bias_level = SND_SOC_BIAS_ON;
- queue_delayed_work(wm8971_workq, &codec->dapm.delayed_work,
- msecs_to_jiffies(1000));
- }
-
- return 0;
-}
-
static int wm8971_probe(struct snd_soc_codec *codec)
{
- int ret = 0;
- u16 reg;
+ struct wm8971_priv *wm8971 = snd_soc_codec_get_drvdata(codec);
- INIT_DELAYED_WORK(&codec->dapm.delayed_work, wm8971_work);
- wm8971_workq = create_workqueue("wm8971");
- if (wm8971_workq == NULL)
- return -ENOMEM;
+ INIT_DELAYED_WORK(&wm8971->charge_work, wm8971_charge_work);
wm8971_reset(codec);
- /* charge output caps - set vmid to 5k for quick power up */
- reg = snd_soc_read(codec, WM8971_PWR1) & 0xfe3e;
- snd_soc_write(codec, WM8971_PWR1, reg | 0x01c0);
- codec->dapm.bias_level = SND_SOC_BIAS_STANDBY;
- queue_delayed_work(wm8971_workq, &codec->dapm.delayed_work,
- msecs_to_jiffies(1000));
-
/* set the update bits */
snd_soc_update_bits(codec, WM8971_LDAC, 0x0100, 0x0100);
snd_soc_update_bits(codec, WM8971_RDAC, 0x0100, 0x0100);
@@ -672,26 +647,13 @@ static int wm8971_probe(struct snd_soc_codec *codec)
snd_soc_update_bits(codec, WM8971_LINVOL, 0x0100, 0x0100);
snd_soc_update_bits(codec, WM8971_RINVOL, 0x0100, 0x0100);
- return ret;
-}
-
-
-/* power down chip */
-static int wm8971_remove(struct snd_soc_codec *codec)
-{
- wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF);
-
- if (wm8971_workq)
- destroy_workqueue(wm8971_workq);
return 0;
}
static struct snd_soc_codec_driver soc_codec_dev_wm8971 = {
.probe = wm8971_probe,
- .remove = wm8971_remove,
- .suspend = wm8971_suspend,
- .resume = wm8971_resume,
.set_bias_level = wm8971_set_bias_level,
+ .suspend_bias_off = true,
.controls = wm8971_snd_controls,
.num_controls = ARRAY_SIZE(wm8971_snd_controls),
@@ -715,7 +677,6 @@ static int wm8971_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct wm8971_priv *wm8971;
- struct regmap *regmap;
int ret;
wm8971 = devm_kzalloc(&i2c->dev, sizeof(struct wm8971_priv),
@@ -723,9 +684,9 @@ static int wm8971_i2c_probe(struct i2c_client *i2c,
if (wm8971 == NULL)
return -ENOMEM;
- regmap = devm_regmap_init_i2c(i2c, &wm8971_regmap);
- if (IS_ERR(regmap))
- return PTR_ERR(regmap);
+ wm8971->regmap = devm_regmap_init_i2c(i2c, &wm8971_regmap);
+ if (IS_ERR(wm8971->regmap))
+ return PTR_ERR(wm8971->regmap);
i2c_set_clientdata(i2c, wm8971);