ASoC: tlv320aic3x: Add device tree bindings

Device tree support for tlv320aic3x CODEC driver.

Signed-off-by: Hebbar, Gururaja <gururaja.hebbar@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/Documentation/devicetree/bindings/sound/tlv320aic3x.txt b/Documentation/devicetree/bindings/sound/tlv320aic3x.txt
new file mode 100644 (file)
index 0000000..e7b98f4
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/tlv320aic3x.txt
@@ -0,0 +1,20 @@
+Texas Instruments - tlv320aic3x Codec module
+
+The tlv320aic3x serial control bus communicates through I2C protocols
+
+Required properties:
+- compatible - "string" -  "ti,tlv320aic3x"
+- reg - <int> -  I2C slave address
+
+
+Optional properties:
+
+- gpio-reset - gpio pin number used for codec reset
+- ai3x-gpio-func - <array of 2 int> - AIC3X_GPIO1 & AIC3X_GPIO2 Functionality
+
+Example:
+
+tlv320aic3x: tlv320aic3x@1b {
+       compatible = "ti,tlv320aic3x";
+       reg = <0x1b>;
+};

diff --git a/sound/soc/codecs/tlv320aic3x.c b/sound/soc/codecs/tlv320aic3x.c
index 01485bd..5708a97 100644 (file)
--- a/sound/soc/codecs/tlv320aic3x.c
+++ b/sound/soc/codecs/tlv320aic3x.c
@@ -40,6 +40,7 @@
 #include <linux/i2c.h>
 #include <linux/gpio.h>
 #include <linux/regulator/consumer.h>
+#include <linux/of_gpio.h>
 #include <linux/slab.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
@@ -1457,6 +1458,8 @@ static int aic3x_i2c_probe(struct i2c_client *i2c,
 {
        struct aic3x_pdata *pdata = i2c->dev.platform_data;
        struct aic3x_priv *aic3x;
+       struct aic3x_setup_data *ai3x_setup;
+       struct device_node *np = i2c->dev.of_node;
        int ret;
 
        aic3x = devm_kzalloc(&i2c->dev, sizeof(struct aic3x_priv), GFP_KERNEL);
@@ -1471,6 +1474,25 @@ static int aic3x_i2c_probe(struct i2c_client *i2c,
        if (pdata) {
                aic3x->gpio_reset = pdata->gpio_reset;
                aic3x->setup = pdata->setup;
+       } else if (np) {
+               ai3x_setup = devm_kzalloc(&i2c->dev, sizeof(*ai3x_setup),
+                                                               GFP_KERNEL);
+               if (ai3x_setup == NULL) {
+                       dev_err(&i2c->dev, "failed to create private data\n");
+                       return -ENOMEM;
+               }
+
+               ret = of_get_named_gpio(np, "gpio-reset", 0);
+               if (ret >= 0)
+                       aic3x->gpio_reset = ret;
+               else
+                       aic3x->gpio_reset = -1;
+
+               if (of_property_read_u32_array(np, "ai3x-gpio-func",
+                                       ai3x_setup->gpio_func, 2) >= 0) {
+                       aic3x->setup = ai3x_setup;
+               }
+
        } else {
                aic3x->gpio_reset = -1;
        }
@@ -1488,11 +1510,20 @@ static int aic3x_i2c_remove(struct i2c_client *client)
        return 0;
 }
 
+#if defined(CONFIG_OF)
+static const struct of_device_id tlv320aic3x_of_match[] = {
+       { .compatible = "ti,tlv320aic3x", },
+       {},
+};
+MODULE_DEVICE_TABLE(of, tlv320aic3x_of_match);
+#endif
+
 /* machine i2c codec control layer */
 static struct i2c_driver aic3x_i2c_driver = {
        .driver = {
                .name = "tlv320aic3x-codec",
                .owner = THIS_MODULE,
+               .of_match_table = of_match_ptr(tlv320aic3x_of_match),
        },
        .probe  = aic3x_i2c_probe,
        .remove = aic3x_i2c_remove,