greybus: gb-audio: Add I2C device for rt5647 codec

Add the I2C device node for the rt5647 codec.

Eventually, this will be done automatically somewhere
else but for now its done in the audio driver.
Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Acked-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/audio.c

@@ -4,7 +4,6 @@
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/workqueue.h>
-#include <linux/i2c.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
@@ -157,6 +156,9 @@ static int gb_i2s_transmitter_connection_init(struct gb_connection *connection)
 	struct gb_snd *snd_dev;
 	struct platform_device *codec, *dai;
 	struct asoc_simple_card_info *simple_card;
+#if USE_RT5645
+	struct i2c_board_info rt5647_info;
+#endif
 	unsigned long flags;
 	int ret;
 
@@ -219,6 +221,18 @@ static int gb_i2s_transmitter_connection_init(struct gb_connection *connection)
 		goto out_get_ver;
 	}
 
+#if USE_RT5645
+	rt5647_info.addr = RT5647_I2C_ADDR;
+	strlcpy(rt5647_info.type, "rt5647", I2C_NAME_SIZE);
+
+	snd_dev->rt5647 = i2c_new_device(i2c_get_adapter(RT5647_I2C_ADAPTER_NR),
+					 &rt5647_info);
+	if (!snd_dev->rt5647) {
+		pr_err("can't create rt5647 i2c device\n");
+		goto out_get_ver;
+	}
+#endif
+
 	return 0;
 
 out_get_ver:
@@ -238,6 +252,10 @@ static void gb_i2s_transmitter_connection_exit(struct gb_connection *connection)
 
 	snd_dev = (struct gb_snd *)connection->private;
 
+#if USE_RT5645
+	i2c_unregister_device(snd_dev->rt5647);
+#endif
+
 	platform_device_unregister(&snd_dev->card);
 	platform_device_unregister(&snd_dev->cpu_dai);
 	platform_device_unregister(snd_dev->codec);

drivers/staging/greybus/audio.h

@@ -4,6 +4,7 @@
 #include <linux/device.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
+#include <linux/i2c.h>
 #include <linux/platform_device.h>
 #include <sound/soc.h>
 #include "greybus.h"
@@ -41,6 +42,7 @@ struct gb_snd {
 	struct platform_device		cpu_dai;
 	struct platform_device		*codec;
 	struct asoc_simple_card_info	*simple_card_info;
+	struct i2c_client		*rt5647;
 	struct gb_connection		*mgmt_connection;
 	struct gb_connection		*i2s_tx_connection;
 	struct gb_connection		*i2s_rx_connection;