ASoC: Disable WM8996 CPVDD supply when not in use

[pandora-kernel.git] / sound / soc / codecs / wm8996.c

diff --git a/sound/soc/codecs/wm8996.c b/sound/soc/codecs/wm8996.c
index e386d25..9d0ab87 100644 (file)
--- a/sound/soc/codecs/wm8996.c
+++ b/sound/soc/codecs/wm8996.c
@@ -41,12 +41,11 @@
 #define HPOUT2L 4
 #define HPOUT2R 8
 
-#define WM8996_NUM_SUPPLIES 4
+#define WM8996_NUM_SUPPLIES 3
 static const char *wm8996_supply_names[WM8996_NUM_SUPPLIES] = {
        "DBVDD",
        "AVDD1",
        "AVDD2",
-       "CPVDD",
 };
 
 struct wm8996_priv {
@@ -71,6 +70,7 @@ struct wm8996_priv {
 
        struct regulator_bulk_data supplies[WM8996_NUM_SUPPLIES];
        struct notifier_block disable_nb[WM8996_NUM_SUPPLIES];
+       struct regulator *cpvdd;
 
        struct wm8996_pdata pdata;
 
@@ -112,7 +112,6 @@ static int wm8996_regulator_event_##n(struct notifier_block *nb, \
 WM8996_REGULATOR_EVENT(0)
 WM8996_REGULATOR_EVENT(1)
 WM8996_REGULATOR_EVENT(2)
-WM8996_REGULATOR_EVENT(3)
 
 static const u16 wm8996_reg[WM8996_MAX_REGISTER] = {
        [WM8996_SOFTWARE_RESET] = 0x8996,
@@ -670,16 +669,29 @@ SOC_SINGLE_TLV("DSP2 EQ B5 Volume", WM8996_DSP2_RX_EQ_GAINS_2, 6, 31, 0,
 static int cp_event(struct snd_soc_dapm_widget *w,
                    struct snd_kcontrol *kcontrol, int event)
 {
+       struct snd_soc_codec *codec = w->codec;
+       struct wm8996_priv *wm8996 = snd_soc_codec_get_drvdata(codec);
+       int ret = 0;
+
        switch (event) {
+       case SND_SOC_DAPM_PRE_PMU:
+               ret = regulator_enable(wm8996->cpvdd);
+               if (ret != 0)
+                       dev_err(codec->dev, "Failed to enable CPVDD: %d\n",
+                               ret);
+               break;
        case SND_SOC_DAPM_POST_PMU:
                msleep(5);
                break;
+       case SND_SOC_DAPM_POST_PMD:
+               regulator_disable_deferred(wm8996->cpvdd, 20);
+               break;
        default:
                BUG();
-               return -EINVAL;
+               ret = -EINVAL;
        }
 
-       return 0;
+       return ret;
 }
 
 static int rmv_short_event(struct snd_soc_dapm_widget *w,
@@ -988,7 +1000,8 @@ SND_SOC_DAPM_SUPPLY_S("SYSCLK", 1, WM8996_AIF_CLOCKING_1, 0, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY_S("SYSDSPCLK", 2, WM8996_CLOCKING_1, 1, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY_S("AIFCLK", 2, WM8996_CLOCKING_1, 2, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY_S("Charge Pump", 2, WM8996_CHARGE_PUMP_1, 15, 0, cp_event,
-                     SND_SOC_DAPM_POST_PMU),
+                     SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
+                     SND_SOC_DAPM_POST_PMD),
 
 SND_SOC_DAPM_SUPPLY("LDO2", WM8996_POWER_MANAGEMENT_2, 1, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("MICB1 Audio", WM8996_MICBIAS_1, 4, 1, NULL, 0),
@@ -2573,7 +2586,13 @@ static int wm8996_probe(struct snd_soc_codec *codec)
        wm8996->disable_nb[0].notifier_call = wm8996_regulator_event_0;
        wm8996->disable_nb[1].notifier_call = wm8996_regulator_event_1;
        wm8996->disable_nb[2].notifier_call = wm8996_regulator_event_2;
-       wm8996->disable_nb[3].notifier_call = wm8996_regulator_event_3;
+
+       wm8996->cpvdd = regulator_get(&i2c->dev, "CPVDD");
+       if (IS_ERR(wm8996->cpvdd)) {
+               ret = PTR_ERR(wm8996->cpvdd);
+               dev_err(&i2c->dev, "Failed to get CPVDD: %d\n", ret);
+               goto err_get;
+       }
 
        /* This should really be moved into the regulator core */
        for (i = 0; i < ARRAY_SIZE(wm8996->supplies); i++) {
@@ -2590,7 +2609,7 @@ static int wm8996_probe(struct snd_soc_codec *codec)
                                    wm8996->supplies);
        if (ret != 0) {
                dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
-               goto err_get;
+               goto err_cpvdd;
        }
 
        if (wm8996->pdata.ldo_ena >= 0) {
@@ -2833,6 +2852,8 @@ err_enable:
                gpio_set_value_cansleep(wm8996->pdata.ldo_ena, 0);
 
        regulator_bulk_disable(ARRAY_SIZE(wm8996->supplies), wm8996->supplies);
+err_cpvdd:
+       regulator_put(wm8996->cpvdd);
 err_get:
        regulator_bulk_free(ARRAY_SIZE(wm8996->supplies), wm8996->supplies);
 err:
@@ -2856,6 +2877,7 @@ static int wm8996_remove(struct snd_soc_codec *codec)
        for (i = 0; i < ARRAY_SIZE(wm8996->supplies); i++)
                regulator_unregister_notifier(wm8996->supplies[i].consumer,
                                              &wm8996->disable_nb[i]);
+       regulator_put(wm8996->cpvdd);
        regulator_bulk_free(ARRAY_SIZE(wm8996->supplies), wm8996->supplies);
 
        return 0;