ASoC: cs42l73: Add Device Tree support for CS42L73

This patch adds support for device tree for the CS42L73 CODEC

Signed-off-by: Brian Austin <brian.austin@cirrus.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 27 insertions, 2 deletions

diff --git a/sound/soc/codecs/cs42l73.c b/sound/soc/codecs/cs42l73.c
index 89efc3c6aefc..549d5d6a3fef 100644
--- a/sound/soc/codecs/cs42l73.c
+++ b/sound/soc/codecs/cs42l73.c
@@ -17,7 +17,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/delay.h>
-#include <linux/gpio.h>
+#include <linux/of_gpio.h>
 #include <linux/pm.h>
 #include <linux/i2c.h>
 #include <linux/regmap.h>
@@ -1416,6 +1416,7 @@ static int cs42l73_i2c_probe(struct i2c_client *i2c_client,
         int ret;
         unsigned int devid = 0;
         unsigned int reg;
+        u32 val32;
 
         cs42l73 = devm_kzalloc(&i2c_client->dev, sizeof(struct cs42l73_private),
                                GFP_KERNEL);
@@ -1431,8 +1432,25 @@ static int cs42l73_i2c_probe(struct i2c_client *i2c_client,
                 return ret;
         }
 
-        if (pdata)
+        if (pdata) {
                 cs42l73->pdata = *pdata;
+        } else {
+                pdata = devm_kzalloc(&i2c_client->dev,
+                                     sizeof(struct cs42l73_platform_data),
+                                GFP_KERNEL);
+                if (!pdata) {
+                        dev_err(&i2c_client->dev, "could not allocate pdata\n");
+                        return -ENOMEM;
+                }
+                if (i2c_client->dev.of_node) {
+                        if (of_property_read_u32(i2c_client->dev.of_node,
+                                "chgfreq", &val32) >= 0)
+                                pdata->chgfreq = val32;
+                }
+                pdata->reset_gpio = of_get_named_gpio(i2c_client->dev.of_node,
+                                                "reset-gpio", 0);
+                cs42l73->pdata = *pdata;
+        }
 
         i2c_set_clientdata(i2c_client, cs42l73);
 
@@ -1493,6 +1511,12 @@ static int cs42l73_i2c_remove(struct i2c_client *client)
         return 0;
 }
 
+static const struct of_device_id cs42l73_of_match[] = {
+        { .compatible = "cirrus,cs42l73", },
+        {},
+};
+MODULE_DEVICE_TABLE(of, cs42l73_of_match);
+
 static const struct i2c_device_id cs42l73_id[] = {
         {"cs42l73", 0},
         {}
@@ -1504,6 +1528,7 @@ static struct i2c_driver cs42l73_i2c_driver = {
         .driver = {
                    .name = "cs42l73",
                    .owner = THIS_MODULE,
+                   .of_match_table = cs42l73_of_match,
                    },
         .id_table = cs42l73_id,
         .probe = cs42l73_i2c_probe,