ASoC: tlv320aic32x4: DT support

Add DT support for this codec. The bindings differ a bit from the aic3x
codec bindings, so I created a new binding documentation.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/Documentation/devicetree/bindings/sound/tlv320aic32x4.txt b/Documentation/devicetree/bindings/sound/tlv320aic32x4.txt
new file mode 100644 (file)
index 0000000..db05510
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/tlv320aic32x4.txt
@@ -0,0 +1,18 @@
+Texas Instruments - tlv320aic32x4 Codec module
+
+The tlv320aic32x4 serial control bus communicates through I2C protocols
+
+Required properties:
+ - compatible: Should be "ti,tlv320aic32x4"
+ - reg: I2C slave address
+
+Optional properties:
+ - reset-gpios: Reset-GPIO phandle with args as described in gpio/gpio.txt
+
+
+Example:
+
+codec: tlv320aic32x4@18 {
+       compatible = "ti,tlv320aic32x4";
+       reg = <0x18>;
+};

diff --git a/sound/soc/codecs/tlv320aic32x4.c b/sound/soc/codecs/tlv320aic32x4.c
index c541213..1dd50e4 100644 (file)
--- a/sound/soc/codecs/tlv320aic32x4.c
+++ b/sound/soc/codecs/tlv320aic32x4.c
@@ -29,6 +29,7 @@
 #include <linux/delay.h>
 #include <linux/pm.h>
 #include <linux/gpio.h>
+#include <linux/of_gpio.h>
 #include <linux/i2c.h>
 #include <linux/cdev.h>
 #include <linux/slab.h>
@@ -669,11 +670,22 @@ static struct snd_soc_codec_driver soc_codec_dev_aic32x4 = {
        .num_dapm_routes = ARRAY_SIZE(aic32x4_dapm_routes),
 };
 
+static int aic32x4_parse_dt(struct aic32x4_priv *aic32x4,
+               struct device_node *np)
+{
+       aic32x4->swapdacs = false;
+       aic32x4->micpga_routing = 0;
+       aic32x4->rstn_gpio = of_get_named_gpio(np, "reset-gpios", 0);
+
+       return 0;
+}
+
 static int aic32x4_i2c_probe(struct i2c_client *i2c,
                             const struct i2c_device_id *id)
 {
        struct aic32x4_pdata *pdata = i2c->dev.platform_data;
        struct aic32x4_priv *aic32x4;
+       struct device_node *np = i2c->dev.of_node;
        int ret;
 
        aic32x4 = devm_kzalloc(&i2c->dev, sizeof(struct aic32x4_priv),
@@ -692,6 +704,12 @@ static int aic32x4_i2c_probe(struct i2c_client *i2c,
                aic32x4->swapdacs = pdata->swapdacs;
                aic32x4->micpga_routing = pdata->micpga_routing;
                aic32x4->rstn_gpio = pdata->rstn_gpio;
+       } else if (np) {
+               ret = aic32x4_parse_dt(aic32x4, np);
+               if (ret) {
+                       dev_err(&i2c->dev, "Failed to parse DT node\n");
+                       return ret;
+               }
        } else {
                aic32x4->power_cfg = 0;
                aic32x4->swapdacs = false;
@@ -723,10 +741,17 @@ static const struct i2c_device_id aic32x4_i2c_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, aic32x4_i2c_id);
 
+static const struct of_device_id aic32x4_of_id[] = {
+       { .compatible = "ti,tlv320aic32x4", },
+       { /* senitel */ }
+};
+MODULE_DEVICE_TABLE(of, aic32x4_of_id);
+
 static struct i2c_driver aic32x4_i2c_driver = {
        .driver = {
                .name = "tlv320aic32x4",
                .owner = THIS_MODULE,
+               .of_match_table = aic32x4_of_id,
        },
        .probe =    aic32x4_i2c_probe,
        .remove =   aic32x4_i2c_remove,