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>

diff --git a/sound/soc/codecs/wm8993.c b/sound/soc/codecs/wm8993.c
index 3c9336c..e97b3f4 100644 (file)
--- 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;