ASoC: Initial WM8993 regulator API hookup

At the minute the regulators are simply enabled for the entire
lifetime of the device.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 38 insertions, 3 deletions

diff --git a/sound/soc/codecs/wm8993.c b/sound/soc/codecs/wm8993.c
index 3c9336cd4eeb..e97b3f45b24b 100644
--- a/sound/soc/codecs/wm8993.c
+++ b/sound/soc/codecs/wm8993.c
@@ -16,6 +16,7 @@
 #include <linux/delay.h>
 #include <linux/pm.h>
 #include <linux/i2c.h>
+#include <linux/regulator/consumer.h>
 #include <linux/spi/spi.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
@@ -29,6 +30,16 @@
 #include "wm8993.h"
 #include "wm_hubs.h"
 
+#define WM8993_NUM_SUPPLIES 6
+static const char *wm8993_supply_names[WM8993_NUM_SUPPLIES] = {
+        "DCVDD",
+        "DBVDD",
+        "AVDD1",
+        "AVDD2",
+        "CPVDD",
+        "SPKVDD",
+};
+
 static u16 wm8993_reg_defaults[WM8993_REGISTER_COUNT] = {
         0x8993,     /* R0   - Software Reset */
         0x0000,     /* R1   - Power Management (1) */
@@ -215,6 +226,7 @@ static struct {
 struct wm8993_priv {
         struct wm_hubs_data hubs_data;
         u16 reg_cache[WM8993_REGISTER_COUNT];
+        struct regulator_bulk_data supplies[WM8993_NUM_SUPPLIES];
         struct wm8993_platform_data pdata;
         struct snd_soc_codec codec;
         int master;
@@ -1496,6 +1508,7 @@ static int wm8993_i2c_probe(struct i2c_client *i2c,
         struct snd_soc_codec *codec;
         unsigned int val;
         int ret;
+        int i;
 
         if (wm8993_codec) {
                 dev_err(&i2c->dev, "A WM8993 is already registered\n");
@@ -1543,16 +1556,33 @@ static int wm8993_i2c_probe(struct i2c_client *i2c,
 
         codec->dev = &i2c->dev;
 
+        for (i = 0; i < ARRAY_SIZE(wm8993->supplies); i++)
+                wm8993->supplies[i].supply = wm8993_supply_names[i];
+
+        ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8993->supplies),
+                                 wm8993->supplies);
+        if (ret != 0) {
+                dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
+                goto err;
+        }
+
+        ret = regulator_bulk_enable(ARRAY_SIZE(wm8993->supplies),
+                                    wm8993->supplies);
+        if (ret != 0) {
+                dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
+                goto err_get;
+        }
+
         val = snd_soc_read(codec, WM8993_SOFTWARE_RESET);
         if (val != wm8993_reg_defaults[WM8993_SOFTWARE_RESET]) {
                 dev_err(codec->dev, "Invalid ID register value %x\n", val);
                 ret = -EINVAL;
-                goto err;
+                goto err_enable;
         }
 
         ret = snd_soc_write(codec, WM8993_SOFTWARE_RESET, 0xffff);
         if (ret != 0)
-                goto err;
+                goto err_enable;
 
         /* By default we're using the output mixers */
         wm8993->class_w_users = 2;
@@ -1582,7 +1612,7 @@ static int wm8993_i2c_probe(struct i2c_client *i2c,
                              
         ret = wm8993_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
         if (ret != 0)
-                goto err;
+                goto err_enable;
 
         wm8993_dai.dev = codec->dev;
 
@@ -1596,6 +1626,10 @@ static int wm8993_i2c_probe(struct i2c_client *i2c,
 
 err_bias:
         wm8993_set_bias_level(codec, SND_SOC_BIAS_OFF);
+err_enable:
+        regulator_bulk_disable(ARRAY_SIZE(wm8993->supplies), wm8993->supplies);
+err_get:
+        regulator_bulk_free(ARRAY_SIZE(wm8993->supplies), wm8993->supplies);
 err:
         wm8993_codec = NULL;
         kfree(wm8993);
@@ -1610,6 +1644,7 @@ static int wm8993_i2c_remove(struct i2c_client *client)
         snd_soc_unregister_dai(&wm8993_dai);
 
         wm8993_set_bias_level(&wm8993->codec, SND_SOC_BIAS_OFF);
+        regulator_bulk_free(ARRAY_SIZE(wm8993->supplies), wm8993->supplies);
         kfree(wm8993);
 
         return 0;