ASoC: sgtl5000: read chip revision for once

Store chip revision in struct sgtl5000_priv when sgtl5000_i2c_probe()
reads it out from register, so that we can use it in
sgtl5000_enable_regulators() with no need to read register again.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/sound/soc/codecs/sgtl5000.c b/sound/soc/codecs/sgtl5000.c
index 1f4093f..bd291d2 100644 (file)
--- a/sound/soc/codecs/sgtl5000.c
+++ b/sound/soc/codecs/sgtl5000.c
@@ -115,6 +115,7 @@ struct sgtl5000_priv {
        struct ldo_regulator *ldo;
        struct regmap *regmap;
        struct clk *mclk;
+       int revision;
 };
 
 /*
@@ -1300,9 +1301,7 @@ static int sgtl5000_replace_vddd_with_ldo(struct snd_soc_codec *codec)
 
 static int sgtl5000_enable_regulators(struct snd_soc_codec *codec)
 {
-       int reg;
        int ret;
-       int rev;
        int i;
        int external_vddd = 0;
        struct sgtl5000_priv *sgtl5000 = snd_soc_codec_get_drvdata(codec);
@@ -1332,14 +1331,7 @@ static int sgtl5000_enable_regulators(struct snd_soc_codec *codec)
         * workaround for revision 0x11 and later,
         * roll back to use internal LDO
         */
-
-       ret = regmap_read(sgtl5000->regmap, SGTL5000_CHIP_ID, &reg);
-       if (ret)
-               goto err_regulator_disable;
-
-       rev = (reg & SGTL5000_REVID_MASK) >> SGTL5000_REVID_SHIFT;
-
-       if (external_vddd && rev >= 0x11) {
+       if (external_vddd && sgtl5000->revision >= 0x11) {
                /* disable all regulator first */
                regulator_bulk_disable(ARRAY_SIZE(sgtl5000->supplies),
                                        sgtl5000->supplies);
@@ -1362,9 +1354,6 @@ static int sgtl5000_enable_regulators(struct snd_soc_codec *codec)
 
        return 0;
 
-err_regulator_disable:
-       regulator_bulk_disable(ARRAY_SIZE(sgtl5000->supplies),
-                               sgtl5000->supplies);
 err_regulator_free:
        regulator_bulk_free(ARRAY_SIZE(sgtl5000->supplies),
                                sgtl5000->supplies);
@@ -1566,6 +1555,7 @@ static int sgtl5000_i2c_probe(struct i2c_client *client,
 
        rev = (reg & SGTL5000_REVID_MASK) >> SGTL5000_REVID_SHIFT;
        dev_info(&client->dev, "sgtl5000 revision 0x%x\n", rev);
+       sgtl5000->revision = rev;
 
        i2c_set_clientdata(client, sgtl5000);