ASoC: mc13783: Add devicetree support

This patch adds devicetree support for mc13783-codec.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>

Documentation/devicetree/bindings/mfd/mc13xxx.txt

@@ -10,6 +10,9 @@ Optional properties:
 - fsl,mc13xxx-uses-touch : Indicate the touchscreen controller is being used
 
 Sub-nodes:
+- codec: Contain the Audio Codec node.
+  - adc-port: Contain PMIC SSI port number used for ADC.
+  - dac-port: Contain PMIC SSI port number used for DAC.
 - leds : Contain the led nodes and initial register values in property
   "led-control". Number of register depends of used IC, for MC13783 is 6,
   for MC13892 is 4, for MC34708 is 1. See datasheet for bits definitions of

drivers/mfd/mc13xxx-core.c

@@ -673,9 +673,13 @@ int mc13xxx_common_init(struct device *dev)
 	if (mc13xxx->flags & MC13XXX_USE_ADC)
 		mc13xxx_add_subdevice(mc13xxx, "%s-adc");
 
-	if (mc13xxx->flags & MC13XXX_USE_CODEC)
-		mc13xxx_add_subdevice_pdata(mc13xxx, "%s-codec",
-					pdata->codec, sizeof(*pdata->codec));
+	if (mc13xxx->flags & MC13XXX_USE_CODEC) {
+		if (pdata)
+			mc13xxx_add_subdevice_pdata(mc13xxx, "%s-codec",
+				pdata->codec, sizeof(*pdata->codec));
+		else
+			mc13xxx_add_subdevice(mc13xxx, "%s-codec");
+	}
 
 	if (mc13xxx->flags & MC13XXX_USE_RTC)
 		mc13xxx_add_subdevice(mc13xxx, "%s-rtc");

sound/soc/codecs/mc13783.c

@@ -22,6 +22,7 @@
  */
 #include <linux/module.h>
 #include <linux/device.h>
+#include <linux/of.h>
 #include <linux/mfd/mc13xxx.h>
 #include <linux/slab.h>
 #include <sound/core.h>
@@ -750,6 +751,7 @@ static int __init mc13783_codec_probe(struct platform_device *pdev)
 {
 	struct mc13783_priv *priv;
 	struct mc13xxx_codec_platform_data *pdata = pdev->dev.platform_data;
+	struct device_node *np;
 	int ret;
 
 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
@@ -760,7 +762,17 @@ static int __init mc13783_codec_probe(struct platform_device *pdev)
 		priv->adc_ssi_port = pdata->adc_ssi_port;
 		priv->dac_ssi_port = pdata->dac_ssi_port;
 	} else {
-		return -ENOSYS;
+		np = of_get_child_by_name(pdev->dev.parent->of_node, "codec");
+		if (!np)
+			return -ENOSYS;
+
+		ret = of_property_read_u32(np, "adc-port", &priv->adc_ssi_port);
+		if (ret)
+			return ret;
+
+		ret = of_property_read_u32(np, "dac-port", &priv->dac_ssi_port);
+		if (ret)
+			return ret;
 	}
 
 	dev_set_drvdata(&pdev->dev, priv);