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ASoC: Convert wm8978 to direct regmap API usage 

Helps push the register cache code down out of ASoC and improves resume
times by using the more efficient regmap cache sync code.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2011-12-29 11:39:39 +00:00
parent f98692ea6d
commit ee60d0155d
2 changed files with 96 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

116
sound/soc/codecs/wm8978.c
View File

@ -18,6 +18,7 @@
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
@ -29,27 +30,74 @@
#include "wm8978.h"
/* wm8978 register cache. Note that register 0 is not included in the cache. */
static const u16 wm8978_reg[WM8978_CACHEREGNUM] = {
0x0000, 0x0000, 0x0000, 0x0000, /* 0x00...0x03 */
0x0050, 0x0000, 0x0140, 0x0000, /* 0x04...0x07 */
0x0000, 0x0000, 0x0000, 0x00ff, /* 0x08...0x0b */
0x00ff, 0x0000, 0x0100, 0x00ff, /* 0x0c...0x0f */
0x00ff, 0x0000, 0x012c, 0x002c, /* 0x10...0x13 */
0x002c, 0x002c, 0x002c, 0x0000, /* 0x14...0x17 */
0x0032, 0x0000, 0x0000, 0x0000, /* 0x18...0x1b */
0x0000, 0x0000, 0x0000, 0x0000, /* 0x1c...0x1f */
0x0038, 0x000b, 0x0032, 0x0000, /* 0x20...0x23 */
0x0008, 0x000c, 0x0093, 0x00e9, /* 0x24...0x27 */
0x0000, 0x0000, 0x0000, 0x0000, /* 0x28...0x2b */
0x0033, 0x0010, 0x0010, 0x0100, /* 0x2c...0x2f */
0x0100, 0x0002, 0x0001, 0x0001, /* 0x30...0x33 */
0x0039, 0x0039, 0x0039, 0x0039, /* 0x34...0x37 */
0x0001, 0x0001, /* 0x38...0x3b */
static const struct reg_default wm8978_reg_defaults[] = {
{ 1, 0x0000 },
{ 2, 0x0000 },
{ 3, 0x0000 },
{ 4, 0x0050 },
{ 5, 0x0000 },
{ 6, 0x0140 },
{ 7, 0x0000 },
{ 8, 0x0000 },
{ 9, 0x0000 },
{ 10, 0x0000 },
{ 11, 0x00ff },
{ 12, 0x00ff },
{ 13, 0x0000 },
{ 14, 0x0100 },
{ 15, 0x00ff },
{ 16, 0x00ff },
{ 17, 0x0000 },
{ 18, 0x012c },
{ 19, 0x002c },
{ 20, 0x002c },
{ 21, 0x002c },
{ 22, 0x002c },
{ 23, 0x0000 },
{ 24, 0x0032 },
{ 25, 0x0000 },
{ 26, 0x0000 },
{ 27, 0x0000 },
{ 28, 0x0000 },
{ 29, 0x0000 },
{ 30, 0x0000 },
{ 31, 0x0000 },
{ 32, 0x0038 },
{ 33, 0x000b },
{ 34, 0x0032 },
{ 35, 0x0000 },
{ 36, 0x0008 },
{ 37, 0x000c },
{ 38, 0x0093 },
{ 39, 0x00e9 },
{ 40, 0x0000 },
{ 41, 0x0000 },
{ 42, 0x0000 },
{ 43, 0x0000 },
{ 44, 0x0033 },
{ 45, 0x0010 },
{ 46, 0x0010 },
{ 47, 0x0100 },
{ 48, 0x0100 },
{ 49, 0x0002 },
{ 50, 0x0001 },
{ 51, 0x0001 },
{ 52, 0x0039 },
{ 53, 0x0039 },
{ 54, 0x0039 },
{ 55, 0x0039 },
{ 56, 0x0001 },
{ 57, 0x0001 },
};
static bool wm8978_volatile(struct device *dev, unsigned int reg)
{
return reg == WM8978_RESET;
}
/* codec private data */
struct wm8978_priv {
struct regmap *regmap;
unsigned int f_pllout;
unsigned int f_mclk;
unsigned int f_256fs;
@ -881,10 +929,14 @@ static struct snd_soc_dai_driver wm8978_dai = {
static int wm8978_suspend(struct snd_soc_codec *codec)
{
struct wm8978_priv *wm8978 = snd_soc_codec_get_drvdata(codec);
wm8978_set_bias_level(codec, SND_SOC_BIAS_OFF);
/* Also switch PLL off */
snd_soc_write(codec, WM8978_POWER_MANAGEMENT_1, 0);
regcache_mark_dirty(wm8978->regmap);
return 0;
}
@ -893,7 +945,7 @@ static int wm8978_resume(struct snd_soc_codec *codec)
struct wm8978_priv *wm8978 = snd_soc_codec_get_drvdata(codec);
/* Sync reg_cache with the hardware */
snd_soc_cache_sync(codec);
regcache_sync(wm8978->regmap);
wm8978_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
@ -933,7 +985,8 @@ static int wm8978_probe(struct snd_soc_codec *codec)
* default hardware setting
*/
wm8978->sysclk = WM8978_PLL;
ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C);
codec->control_data = wm8978->regmap;
ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_REGMAP);
if (ret < 0) {
dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
return ret;
@ -972,9 +1025,6 @@ static struct snd_soc_codec_driver soc_codec_dev_wm8978 = {
.suspend = wm8978_suspend,
.resume = wm8978_resume,
.set_bias_level = wm8978_set_bias_level,
.reg_cache_size = ARRAY_SIZE(wm8978_reg),
.reg_word_size = sizeof(u16),
.reg_cache_default = wm8978_reg,
.controls = wm8978_snd_controls,
.num_controls = ARRAY_SIZE(wm8978_snd_controls),
@ -984,6 +1034,18 @@ static struct snd_soc_codec_driver soc_codec_dev_wm8978 = {
.num_dapm_routes = ARRAY_SIZE(wm8978_dapm_routes),
};
static const struct regmap_config wm8978_regmap_config = {
.reg_bits = 7,
.val_bits = 9,
.max_register = WM8978_MAX_REGISTER,
.volatile_reg = wm8978_volatile,
.cache_type = REGCACHE_RBTREE,
.reg_defaults = wm8978_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(wm8978_reg_defaults),
};
static __devinit int wm8978_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
@ -995,6 +1057,13 @@ static __devinit int wm8978_i2c_probe(struct i2c_client *i2c,
if (wm8978 == NULL)
return -ENOMEM;
wm8978->regmap = regmap_init_i2c(i2c, &wm8978_regmap_config);
if (IS_ERR(wm8978->regmap)) {
ret = PTR_ERR(wm8978->regmap);
dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret);
return ret;
}
i2c_set_clientdata(i2c, wm8978);
ret = snd_soc_register_codec(&i2c->dev,
@ -1005,7 +1074,10 @@ static __devinit int wm8978_i2c_probe(struct i2c_client *i2c,
static __devexit int wm8978_i2c_remove(struct i2c_client *client)
{
struct wm8978_priv *wm8978 = i2c_get_clientdata(client);
snd_soc_unregister_codec(&client->dev);
regmap_exit(wm8978->regmap);
return 0;
}

2
sound/soc/codecs/wm8978.h
View File

@ -67,6 +67,8 @@
#define WM8978_OUT3_MIXER_CONTROL 0x38
#define WM8978_OUT4_MIXER_CONTROL 0x39
#define WM8978_MAX_REGISTER 0x39
#define WM8978_CACHEREGNUM 58
/* Clock divider Id's */