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ASoC: wm8960: Add device tree support
Document the device tree binding for the WM8960 codec, and modify the driver to extract the platform data from device tree, if present. Signed-off-by: Zidan Wang <b50113@freescale.com> Signed-off-by: Mark Brown <broonie@kernel.org>
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Documentation/devicetree/bindings/sound/wm8960.txt
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31
Documentation/devicetree/bindings/sound/wm8960.txt
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@ -0,0 +1,31 @@
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WM8960 audio CODEC
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This device supports I2C only.
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Required properties:
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- compatible : "wlf,wm8960"
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- reg : the I2C address of the device.
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Optional properties:
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- wlf,shared-lrclk: This is a boolean property. If present, the LRCM bit of
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R24 (Additional control 2) gets set, indicating that ADCLRC and DACLRC pins
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will be disabled only when ADC (Left and Right) and DAC (Left and Right)
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are disabled.
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When wm8960 works on synchronize mode and DACLRC pin is used to supply
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frame clock, it will no frame clock for captrue unless enable DAC to enable
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DACLRC pin. If shared-lrclk is present, no need to enable DAC for captrue.
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- wlf,capless: This is a boolean property. If present, OUT3 pin will be
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enabled and disabled together with HP_L and HP_R pins in response to jack
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detect events.
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Example:
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codec: wm8960@1a {
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compatible = "wlf,wm8960";
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reg = <0x1a>;
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wlf,shared-lrclk;
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};
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@ -125,6 +125,7 @@ struct wm8960_priv {
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struct snd_soc_dapm_widget *out3;
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bool deemph;
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int playback_fs;
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struct wm8960_data pdata;
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};
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#define wm8960_reset(c) snd_soc_write(c, WM8960_RESET, 0)
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@ -440,8 +441,8 @@ static const struct snd_soc_dapm_route audio_paths_capless[] = {
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static int wm8960_add_widgets(struct snd_soc_codec *codec)
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{
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struct wm8960_data *pdata = codec->dev->platform_data;
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struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
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struct wm8960_data *pdata = &wm8960->pdata;
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struct snd_soc_dapm_context *dapm = &codec->dapm;
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struct snd_soc_dapm_widget *w;
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@ -961,17 +962,13 @@ static int wm8960_resume(struct snd_soc_codec *codec)
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static int wm8960_probe(struct snd_soc_codec *codec)
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{
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struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
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struct wm8960_data *pdata = dev_get_platdata(codec->dev);
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struct wm8960_data *pdata = &wm8960->pdata;
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int ret;
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wm8960->set_bias_level = wm8960_set_bias_level_out3;
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if (!pdata) {
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dev_warn(codec->dev, "No platform data supplied\n");
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} else {
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if (pdata->capless)
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wm8960->set_bias_level = wm8960_set_bias_level_capless;
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}
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if (pdata->capless)
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wm8960->set_bias_level = wm8960_set_bias_level_capless;
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else
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wm8960->set_bias_level = wm8960_set_bias_level_out3;
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ret = wm8960_reset(codec);
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if (ret < 0) {
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@ -1029,6 +1026,18 @@ static const struct regmap_config wm8960_regmap = {
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.volatile_reg = wm8960_volatile,
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};
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static void wm8960_set_pdata_from_of(struct i2c_client *i2c,
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struct wm8960_data *pdata)
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{
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const struct device_node *np = i2c->dev.of_node;
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if (of_property_read_bool(np, "wlf,capless"))
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pdata->capless = true;
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if (of_property_read_bool(np, "wlf,shared-lrclk"))
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pdata->shared_lrclk = true;
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}
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static int wm8960_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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@ -1045,6 +1054,11 @@ static int wm8960_i2c_probe(struct i2c_client *i2c,
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if (IS_ERR(wm8960->regmap))
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return PTR_ERR(wm8960->regmap);
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if (pdata)
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memcpy(&wm8960->pdata, pdata, sizeof(struct wm8960_data));
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else if (i2c->dev.of_node)
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wm8960_set_pdata_from_of(i2c, &wm8960->pdata);
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if (pdata && pdata->shared_lrclk) {
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ret = regmap_update_bits(wm8960->regmap, WM8960_ADDCTL2,
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0x4, 0x4);
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@ -1075,10 +1089,17 @@ static const struct i2c_device_id wm8960_i2c_id[] = {
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};
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MODULE_DEVICE_TABLE(i2c, wm8960_i2c_id);
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static const struct of_device_id wm8960_of_match[] = {
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{ .compatible = "wlf,wm8960", },
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{ }
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};
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MODULE_DEVICE_TABLE(of, wm8960_of_match);
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static struct i2c_driver wm8960_i2c_driver = {
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.driver = {
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.name = "wm8960",
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.owner = THIS_MODULE,
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.of_match_table = wm8960_of_match,
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},
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.probe = wm8960_i2c_probe,
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.remove = wm8960_i2c_remove,
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