ASoC: tpa6130a2: Add device tree support

Add device tree support to tpa6130a2 driver and document the
bindings.

Signed-off-by: Sebastian Reichel <sre@debian.org>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/Documentation/devicetree/bindings/sound/tpa6130a2.txt b/Documentation/devicetree/bindings/sound/tpa6130a2.txt
new file mode 100644 (file)
index 0000000..6dfa740
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/tpa6130a2.txt
@@ -0,0 +1,27 @@
+Texas Instruments - tpa6130a2 Codec module
+
+The tpa6130a2 serial control bus communicates through I2C protocols
+
+Required properties:
+
+- compatible - "string" - One of:
+    "ti,tpa6130a2" - TPA6130A2
+    "ti,tpa6140a2" - TPA6140A2
+
+
+- reg - <int> -  I2C slave address
+
+- Vdd-supply - <phandle> - power supply regulator
+
+Optional properties:
+
+- power-gpio - gpio pin to power the device
+
+Example:
+
+tpa6130a2: tpa6130a2@60 {
+       compatible = "ti,tpa6130a2";
+       reg = <0x60>;
+       Vdd-supply = <&vmmc2>;
+       power-gpio = <&gpio4 2 GPIO_ACTIVE_HIGH>;
+};

diff --git a/sound/soc/codecs/tpa6130a2.c b/sound/soc/codecs/tpa6130a2.c
index c58bee8..998555f 100644 (file)
--- a/sound/soc/codecs/tpa6130a2.c
+++ b/sound/soc/codecs/tpa6130a2.c
@@ -30,6 +30,7 @@
 #include <sound/tpa6130a2-plat.h>
 #include <sound/soc.h>
 #include <sound/tlv.h>
+#include <linux/of_gpio.h>
 
 #include "tpa6130a2.h"
 
@@ -364,30 +365,33 @@ static int tpa6130a2_probe(struct i2c_client *client,
 {
        struct device *dev;
        struct tpa6130a2_data *data;
-       struct tpa6130a2_platform_data *pdata;
+       struct tpa6130a2_platform_data *pdata = client->dev.platform_data;
+       struct device_node *np = client->dev.of_node;
        const char *regulator;
        int ret;
 
        dev = &client->dev;
 
-       if (client->dev.platform_data == NULL) {
-               dev_err(dev, "Platform data not set\n");
-               dump_stack();
-               return -ENODEV;
-       }
-
        data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
        if (data == NULL) {
                dev_err(dev, "Can not allocate memory\n");
                return -ENOMEM;
        }
 
+       if (pdata) {
+               data->power_gpio = pdata->power_gpio;
+       } else if (np) {
+               data->power_gpio = of_get_named_gpio(np, "power-gpio", 0);
+       } else {
+               dev_err(dev, "Platform data not set\n");
+               dump_stack();
+               return -ENODEV;
+       }
+
        tpa6130a2_client = client;
 
        i2c_set_clientdata(tpa6130a2_client, data);
 
-       pdata = client->dev.platform_data;
-       data->power_gpio = pdata->power_gpio;
        data->id = id->driver_data;
 
        mutex_init(&data->mutex);
@@ -466,10 +470,20 @@ static const struct i2c_device_id tpa6130a2_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);
 
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id tpa6130a2_of_match[] = {
+       { .compatible = "ti,tpa6130a2", },
+       { .compatible = "ti,tpa6140a2" },
+       {},
+};
+MODULE_DEVICE_TABLE(of, tpa6130a2_of_match);
+#endif
+
 static struct i2c_driver tpa6130a2_i2c_driver = {
        .driver = {
                .name = "tpa6130a2",
                .owner = THIS_MODULE,
+               .of_match_table = of_match_ptr(tpa6130a2_of_match),
        },
        .probe = tpa6130a2_probe,
        .remove = tpa6130a2_remove,