ASoC: lm4857: Convert to regmap

Use regmap for IO for the lm4857 driver instead of open-coding the IO read/write
functions.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/sound/soc/codecs/lm4857.c b/sound/soc/codecs/lm4857.c
index 5ea2ed053eb75f3753876b3fd32767f416a52bbc..0e5743ea79dfdf6c4a4191694955883fbede59ca 100644 (file)
--- a/sound/soc/codecs/lm4857.c
+++ b/sound/soc/codecs/lm4857.c
@@ -16,6 +16,7 @@
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/i2c.h>
+#include <linux/regmap.h>
 #include <linux/slab.h>
 
 #include <sound/core.h>
@@ -23,12 +24,15 @@
 #include <sound/tlv.h>
 
 struct lm4857 {
-       struct i2c_client *i2c;
+       struct regmap *regmap;
        uint8_t mode;
 };
 
-static const uint8_t lm4857_default_regs[] = {
-       0x00, 0x00, 0x00, 0x00,
+static const struct reg_default lm4857_default_regs[] = {
+       { 0x0, 0x00 },
+       { 0x1, 0x00 },
+       { 0x2, 0x00 },
+       { 0x3, 0x00 },
 };
 
 /* The register offsets in the cache array */
@@ -42,39 +46,6 @@ static const uint8_t lm4857_default_regs[] = {
 #define LM4857_WAKEUP 5
 #define LM4857_EPGAIN 4
 
-static int lm4857_write(struct snd_soc_codec *codec, unsigned int reg,
-               unsigned int value)
-{
-       uint8_t data;
-       int ret;
-
-       ret = snd_soc_cache_write(codec, reg, value);
-       if (ret < 0)
-               return ret;
-
-       data = (reg << 6) | value;
-       ret = i2c_master_send(codec->control_data, &data, 1);
-       if (ret != 1) {
-               dev_err(codec->dev, "Failed to write register: %d\n", ret);
-               return ret;
-       }
-
-       return 0;
-}
-
-static unsigned int lm4857_read(struct snd_soc_codec *codec,
-               unsigned int reg)
-{
-       unsigned int val;
-       int ret;
-
-       ret = snd_soc_cache_read(codec, reg, &val);
-       if (ret)
-               return -1;
-
-       return val;
-}
-
 static int lm4857_get_mode(struct snd_kcontrol *kcontrol,
        struct snd_ctl_elem_value *ucontrol)
 {
@@ -96,7 +67,7 @@ static int lm4857_set_mode(struct snd_kcontrol *kcontrol,
        lm4857->mode = value;
 
        if (codec->dapm.bias_level == SND_SOC_BIAS_ON)
-               snd_soc_update_bits(codec, LM4857_CTRL, 0x0F, value + 6);
+               regmap_update_bits(lm4857->regmap, LM4857_CTRL, 0x0F, value + 6);
 
        return 1;
 }
@@ -108,10 +79,11 @@ static int lm4857_set_bias_level(struct snd_soc_codec *codec,
 
        switch (level) {
        case SND_SOC_BIAS_ON:
-               snd_soc_update_bits(codec, LM4857_CTRL, 0x0F, lm4857->mode + 6);
+               regmap_update_bits(lm4857->regmap, LM4857_CTRL, 0x0F,
+                       lm4857->mode + 6);
                break;
        case SND_SOC_BIAS_STANDBY:
-               snd_soc_update_bits(codec, LM4857_CTRL, 0x0F, 0);
+               regmap_update_bits(lm4857->regmap, LM4857_CTRL, 0x0F, 0);
                break;
        default:
                break;
@@ -171,22 +143,7 @@ static const struct snd_soc_dapm_route lm4857_routes[] = {
        {"EP", NULL, "IN"},
 };
 
-static int lm4857_probe(struct snd_soc_codec *codec)
-{
-       struct lm4857 *lm4857 = snd_soc_codec_get_drvdata(codec);
-
-       codec->control_data = lm4857->i2c;
-
-       return 0;
-}
-
 static struct snd_soc_codec_driver soc_codec_dev_lm4857 = {
-       .write = lm4857_write,
-       .read = lm4857_read,
-       .probe = lm4857_probe,
-       .reg_cache_size = ARRAY_SIZE(lm4857_default_regs),
-       .reg_word_size = sizeof(uint8_t),
-       .reg_cache_default = lm4857_default_regs,
        .set_bias_level = lm4857_set_bias_level,
 
        .controls = lm4857_controls,
@@ -197,11 +154,21 @@ static struct snd_soc_codec_driver soc_codec_dev_lm4857 = {
        .num_dapm_routes = ARRAY_SIZE(lm4857_routes),
 };
 
+static const struct regmap_config lm4857_regmap_config = {
+       .val_bits = 6,
+       .reg_bits = 2,
+
+       .max_register = LM4857_CTRL,
+
+       .cache_type = REGCACHE_FLAT,
+       .reg_defaults = lm4857_default_regs,
+       .num_reg_defaults = ARRAY_SIZE(lm4857_default_regs),
+};
+
 static int lm4857_i2c_probe(struct i2c_client *i2c,
                            const struct i2c_device_id *id)
 {
        struct lm4857 *lm4857;
-       int ret;
 
        lm4857 = devm_kzalloc(&i2c->dev, sizeof(*lm4857), GFP_KERNEL);
        if (!lm4857)
@@ -209,11 +176,11 @@ static int lm4857_i2c_probe(struct i2c_client *i2c,
 
        i2c_set_clientdata(i2c, lm4857);
 
-       lm4857->i2c = i2c;
-
-       ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_lm4857, NULL, 0);
+       lm4857->regmap = devm_regmap_init_i2c(i2c, &lm4857_regmap_config);
+       if (IS_ERR(lm4857->regmap))
+               return PTR_ERR(lm4857->regmap);
 
-       return ret;
+       return snd_soc_register_codec(&i2c->dev, &soc_codec_dev_lm4857, NULL, 0);
 }
 
 static int lm4857_i2c_remove(struct i2c_client *i2c)