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authorDaniel Mack <zonque@gmail.com>2013-10-01 16:48:25 +0400
committerMark Brown <broonie@linaro.org>2013-10-03 17:14:37 +0400
commitd5fd3ccc2d9df493ad6f1eaf7aba72f690e98937 (patch)
treee32d896baf377e744f430847f4d40b858c22a779 /sound/soc/codecs/tas5086.c
parent648c538204c23370c734d72921155cc24aff928d (diff)
downloadlinux-d5fd3ccc2d9df493ad6f1eaf7aba72f690e98937.tar.xz
ASoC: tas5086: move initialization code to own functions
We'll need to call code to initialize and reset the codec again at resume time, so factor it out first. Signed-off-by: Daniel Mack <zonque@gmail.com> Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'sound/soc/codecs/tas5086.c')
-rw-r--r--sound/soc/codecs/tas5086.c128
1 files changed, 72 insertions, 56 deletions
diff --git a/sound/soc/codecs/tas5086.c b/sound/soc/codecs/tas5086.c
index 31b5868ef7c1..3a88c68145c2 100644
--- a/sound/soc/codecs/tas5086.c
+++ b/sound/soc/codecs/tas5086.c
@@ -458,6 +458,75 @@ static int tas5086_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
return regmap_write(priv->regmap, TAS5086_SOFT_MUTE, val);
}
+static void tas5086_reset(struct tas5086_private *priv)
+{
+ if (gpio_is_valid(priv->gpio_nreset)) {
+ /* Reset codec - minimum assertion time is 400ns */
+ gpio_direction_output(priv->gpio_nreset, 0);
+ udelay(1);
+ gpio_set_value(priv->gpio_nreset, 1);
+
+ /* Codec needs ~15ms to wake up */
+ msleep(15);
+ }
+}
+
+/* charge period values in microseconds */
+static const int tas5086_charge_period[] = {
+ 13000, 16900, 23400, 31200, 41600, 54600, 72800, 96200,
+ 130000, 156000, 234000, 312000, 416000, 546000, 728000, 962000,
+ 1300000, 169000, 2340000, 3120000, 4160000, 5460000, 7280000, 9620000,
+};
+
+static int tas5086_init(struct device *dev, struct tas5086_private *priv)
+{
+ int ret, i;
+
+ /*
+ * If any of the channels is configured to start in Mid-Z mode,
+ * configure 'part 1' of the PWM starts to use Mid-Z, and tell
+ * all configured mid-z channels to start start under 'part 1'.
+ */
+ if (priv->pwm_start_mid_z)
+ regmap_write(priv->regmap, TAS5086_PWM_START,
+ TAS5086_PWM_START_MIDZ_FOR_START_1 |
+ priv->pwm_start_mid_z);
+
+ /* lookup and set split-capacitor charge period */
+ if (priv->charge_period == 0) {
+ regmap_write(priv->regmap, TAS5086_SPLIT_CAP_CHARGE, 0);
+ } else {
+ i = index_in_array(tas5086_charge_period,
+ ARRAY_SIZE(tas5086_charge_period),
+ priv->charge_period);
+ if (i >= 0)
+ regmap_write(priv->regmap, TAS5086_SPLIT_CAP_CHARGE,
+ i + 0x08);
+ else
+ dev_warn(dev,
+ "Invalid split-cap charge period of %d ns.\n",
+ priv->charge_period);
+ }
+
+ /* enable factory trim */
+ ret = regmap_write(priv->regmap, TAS5086_OSC_TRIM, 0x00);
+ if (ret < 0)
+ return ret;
+
+ /* start all channels */
+ ret = regmap_write(priv->regmap, TAS5086_SYS_CONTROL_2, 0x20);
+ if (ret < 0)
+ return ret;
+
+ /* mute all channels for now */
+ ret = regmap_write(priv->regmap, TAS5086_SOFT_MUTE,
+ TAS5086_SOFT_MUTE_ALL);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
/* TAS5086 controls */
static const DECLARE_TLV_DB_SCALE(tas5086_dac_tlv, -10350, 50, 1);
@@ -712,13 +781,6 @@ static const struct of_device_id tas5086_dt_ids[] = {
MODULE_DEVICE_TABLE(of, tas5086_dt_ids);
#endif
-/* charge period values in microseconds */
-static const int tas5086_charge_period[] = {
- 13000, 16900, 23400, 31200, 41600, 54600, 72800, 96200,
- 130000, 156000, 234000, 312000, 416000, 546000, 728000, 962000,
- 1300000, 169000, 2340000, 3120000, 4160000, 5460000, 7280000, 9620000,
-};
-
static int tas5086_probe(struct snd_soc_codec *codec)
{
struct tas5086_private *priv = snd_soc_codec_get_drvdata(codec);
@@ -729,6 +791,7 @@ static int tas5086_probe(struct snd_soc_codec *codec)
if (of_match_device(of_match_ptr(tas5086_dt_ids), codec->dev)) {
struct device_node *of_node = codec->dev->of_node;
+
of_property_read_u32(of_node, "ti,charge-period",
&priv->charge_period);
@@ -743,39 +806,7 @@ static int tas5086_probe(struct snd_soc_codec *codec)
}
}
- /*
- * If any of the channels is configured to start in Mid-Z mode,
- * configure 'part 1' of the PWM starts to use Mid-Z, and tell
- * all configured mid-z channels to start start under 'part 1'.
- */
- if (priv->pwm_start_mid_z)
- regmap_write(priv->regmap, TAS5086_PWM_START,
- TAS5086_PWM_START_MIDZ_FOR_START_1 |
- priv->pwm_start_mid_z);
-
- /* lookup and set split-capacitor charge period */
- if (priv->charge_period == 0) {
- regmap_write(priv->regmap, TAS5086_SPLIT_CAP_CHARGE, 0);
- } else {
- i = index_in_array(tas5086_charge_period,
- ARRAY_SIZE(tas5086_charge_period),
- priv->charge_period);
- if (i >= 0)
- regmap_write(priv->regmap, TAS5086_SPLIT_CAP_CHARGE,
- i + 0x08);
- else
- dev_warn(codec->dev,
- "Invalid split-cap charge period of %d ns.\n",
- priv->charge_period);
- }
-
- /* enable factory trim */
- ret = regmap_write(priv->regmap, TAS5086_OSC_TRIM, 0x00);
- if (ret < 0)
- return ret;
-
- /* start all channels */
- ret = regmap_write(priv->regmap, TAS5086_SYS_CONTROL_2, 0x20);
+ ret = tas5086_init(codec->dev, priv);
if (ret < 0)
return ret;
@@ -784,12 +815,6 @@ static int tas5086_probe(struct snd_soc_codec *codec)
if (ret < 0)
return ret;
- /* mute all channels for now */
- ret = regmap_write(priv->regmap, TAS5086_SOFT_MUTE,
- TAS5086_SOFT_MUTE_ALL);
- if (ret < 0)
- return ret;
-
return 0;
}
@@ -866,17 +891,8 @@ static int tas5086_i2c_probe(struct i2c_client *i2c,
if (devm_gpio_request(dev, gpio_nreset, "TAS5086 Reset"))
gpio_nreset = -EINVAL;
- if (gpio_is_valid(gpio_nreset)) {
- /* Reset codec - minimum assertion time is 400ns */
- gpio_direction_output(gpio_nreset, 0);
- udelay(1);
- gpio_set_value(gpio_nreset, 1);
-
- /* Codec needs ~15ms to wake up */
- msleep(15);
- }
-
priv->gpio_nreset = gpio_nreset;
+ tas5086_reset(priv);
/* The TAS5086 always returns 0x03 in its TAS5086_DEV_ID register */
ret = regmap_read(priv->regmap, TAS5086_DEV_ID, &i);