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 --- Documentation/devicetree/bindings/sound/wm8960.txt | 31 ++++++++++++++++ sound/soc/codecs/wm8960.c | 41 ++++++++++++++++------ 2 files changed, 62 insertions(+), 10 deletions(-) create mode 100644 Documentation/devicetree/bindings/sound/wm8960.txt

diff --git a/Documentation/devicetree/bindings/sound/wm8960.txt b/Documentation/devicetree/bindings/sound/wm8960.txt new file mode 100644 index 0000000..2deb8a3 --- /dev/null +++ b/Documentation/devicetree/bindings/sound/wm8960.txt @@ -0,0 +1,31 @@ +WM8960 audio CODEC + +This device supports I2C only. + +Required properties: + + - compatible : "wlf,wm8960" + + - reg : the I2C address of the device. + +Optional properties: + - wlf,shared-lrclk: This is a boolean property. If present, the LRCM bit of + R24 (Additional control 2) gets set, indicating that ADCLRC and DACLRC pins + will be disabled only when ADC (Left and Right) and DAC (Left and Right) + are disabled. + When wm8960 works on synchronize mode and DACLRC pin is used to supply + frame clock, it will no frame clock for captrue unless enable DAC to enable + DACLRC pin. If shared-lrclk is present, no need to enable DAC for captrue. + + - wlf,capless: This is a boolean property. If present, OUT3 pin will be + enabled and disabled together with HP_L and HP_R pins in response to jack + detect events. + +Example: + +codec: wm8960@1a { + compatible = "wlf,wm8960"; + reg = <0x1a>; + + wlf,shared-lrclk; +}; diff --git a/sound/soc/codecs/wm8960.c b/sound/soc/codecs/wm8960.c index 4dc4e85..99d6457 100644 --- a/sound/soc/codecs/wm8960.c +++ b/sound/soc/codecs/wm8960.c @@ -125,6 +125,7 @@ struct wm8960_priv { struct snd_soc_dapm_widget *out3; bool deemph; int playback_fs; + struct wm8960_data pdata; };

#define wm8960_reset(c) snd_soc_write(c, WM8960_RESET, 0) @@ -440,8 +441,8 @@ static const struct snd_soc_dapm_route audio_paths_capless[] = {

static int wm8960_add_widgets(struct snd_soc_codec *codec) { - struct wm8960_data *pdata = codec->dev->platform_data; struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec); + struct wm8960_data *pdata = &wm8960->pdata; struct snd_soc_dapm_context *dapm = &codec->dapm; struct snd_soc_dapm_widget *w;

@@ -961,17 +962,13 @@ static int wm8960_resume(struct snd_soc_codec *codec) static int wm8960_probe(struct snd_soc_codec *codec) { struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec); - struct wm8960_data *pdata = dev_get_platdata(codec->dev); + struct wm8960_data *pdata = &wm8960->pdata; int ret;

- wm8960->set_bias_level = wm8960_set_bias_level_out3; - - if (!pdata) { - dev_warn(codec->dev, "No platform data supplied\n"); - } else { - if (pdata->capless) - wm8960->set_bias_level = wm8960_set_bias_level_capless; - } + if (pdata->capless) + wm8960->set_bias_level = wm8960_set_bias_level_capless; + else + wm8960->set_bias_level = wm8960_set_bias_level_out3;

ret = wm8960_reset(codec); if (ret < 0) { @@ -1029,6 +1026,18 @@ static const struct regmap_config wm8960_regmap = { .volatile_reg = wm8960_volatile, };

+static void wm8960_set_pdata_from_of(struct i2c_client *i2c, + struct wm8960_data *pdata) +{ + const struct device_node *np = i2c->dev.of_node; + + if (of_property_read_bool(np, "wlf,capless")) + pdata->capless = true; + + if (of_property_read_bool(np, "wlf,shared-lrclk")) + pdata->shared_lrclk = true; +} + static int wm8960_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { @@ -1045,6 +1054,11 @@ static int wm8960_i2c_probe(struct i2c_client *i2c, if (IS_ERR(wm8960->regmap)) return PTR_ERR(wm8960->regmap);

+ if (pdata) + memcpy(&wm8960->pdata, pdata, sizeof(struct wm8960_data)); + else if (i2c->dev.of_node) + wm8960_set_pdata_from_of(i2c, &wm8960->pdata); + if (pdata && pdata->shared_lrclk) { ret = regmap_update_bits(wm8960->regmap, WM8960_ADDCTL2, 0x4, 0x4); @@ -1075,10 +1089,17 @@ static const struct i2c_device_id wm8960_i2c_id[] = { }; MODULE_DEVICE_TABLE(i2c, wm8960_i2c_id);

+static const struct of_device_id wm8960_of_match[] = { + { .compatible = "wlf,wm8960", }, + { } +}; +MODULE_DEVICE_TABLE(of, wm8960_of_match); + static struct i2c_driver wm8960_i2c_driver = { .driver = { .name = "wm8960", .owner = THIS_MODULE, + .of_match_table = wm8960_of_match, }, .probe = wm8960_i2c_probe, .remove = wm8960_i2c_remove,