ASoC: Add regulator support for WM8731

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 47 insertions, 4 deletions

diff --git a/sound/soc/codecs/wm8731.c b/sound/soc/codecs/wm8731.c
index 0e59219a59f4..bb95af950971 100644
--- a/sound/soc/codecs/wm8731.c
+++ b/sound/soc/codecs/wm8731.c
@@ -19,6 +19,7 @@
 #include <linux/pm.h>
 #include <linux/i2c.h>
 #include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
 #include <linux/spi/spi.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
@@ -33,9 +34,18 @@
 static struct snd_soc_codec *wm8731_codec;
 struct snd_soc_codec_device soc_codec_dev_wm8731;
 
+#define WM8731_NUM_SUPPLIES 4
+static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = {
+        "AVDD",
+        "HPVDD",
+        "DCVDD",
+        "DBVDD",
+};
+
 /* codec private data */
 struct wm8731_priv {
         struct snd_soc_codec codec;
+        struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES];
         u16 reg_cache[WM8731_CACHEREGNUM];
         unsigned int sysclk;
 };
@@ -422,9 +432,12 @@ static int wm8731_suspend(struct platform_device *pdev, pm_message_t state)
 {
         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
         struct snd_soc_codec *codec = socdev->card->codec;
+        struct wm8731_priv *wm8731 = codec->private_data;
 
         snd_soc_write(codec, WM8731_ACTIVE, 0x0);
         wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF);
+        regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies),
+                               wm8731->supplies);
         return 0;
 }
 
@@ -432,10 +445,16 @@ static int wm8731_resume(struct platform_device *pdev)
 {
         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
         struct snd_soc_codec *codec = socdev->card->codec;
-        int i;
+        struct wm8731_priv *wm8731 = codec->private_data;
+        int i, ret;
         u8 data[2];
         u16 *cache = codec->reg_cache;
 
+        ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
+                                    wm8731->supplies);
+        if (ret != 0)
+                return ret;
+
         /* Sync reg_cache with the hardware */
         for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) {
                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
@@ -444,6 +463,7 @@ static int wm8731_resume(struct platform_device *pdev)
         }
         wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
         wm8731_set_bias_level(codec, codec->suspend_bias_level);
+
         return 0;
 }
 #else
@@ -512,7 +532,7 @@ EXPORT_SYMBOL_GPL(soc_codec_dev_wm8731);
 static int wm8731_register(struct wm8731_priv *wm8731,
                            enum snd_soc_control_type control)
 {
-        int ret;
+        int ret, i;
         struct snd_soc_codec *codec = &wm8731->codec;
 
         if (wm8731_codec) {
@@ -543,10 +563,27 @@ static int wm8731_register(struct wm8731_priv *wm8731,
                 goto err;
         }
 
+        for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++)
+                wm8731->supplies[i].supply = wm8731_supply_names[i];
+
+        ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies),
+                                 wm8731->supplies);
+        if (ret != 0) {
+                dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
+                goto err;
+        }
+
+        ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
+                                    wm8731->supplies);
+        if (ret != 0) {
+                dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
+                goto err_regulator_get;
+        }
+
         ret = wm8731_reset(codec);
         if (ret < 0) {
                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
-                goto err;
+                goto err_regulator_enable;
         }
 
         wm8731_dai.dev = codec->dev;
@@ -567,7 +604,7 @@ static int wm8731_register(struct wm8731_priv *wm8731,
         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_dai(&wm8731_dai);
@@ -581,6 +618,10 @@ static int wm8731_register(struct wm8731_priv *wm8731,
 
 err_codec:
         snd_soc_unregister_codec(codec);
+err_regulator_enable:
+        regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
+err_regulator_get:
+        regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 err:
         kfree(wm8731);
         return ret;
@@ -591,6 +632,8 @@ static void wm8731_unregister(struct wm8731_priv *wm8731)
         wm8731_set_bias_level(&wm8731->codec, SND_SOC_BIAS_OFF);
         snd_soc_unregister_dai(&wm8731_dai);
         snd_soc_unregister_codec(&wm8731->codec);
+        regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
+        regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
         kfree(wm8731);
         wm8731_codec = NULL;
 }