ASoC: SSM2602: add SPI support

The ssm2602 codec has a SPI interface as well as I2C, so add the simple
bit of glue to make it usable.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 52 insertions, 4 deletions

diff --git a/sound/soc/codecs/ssm2602.c b/sound/soc/codecs/ssm2602.c
index 8a2b52fa4a7e..7e2194975360 100644
--- a/sound/soc/codecs/ssm2602.c
+++ b/sound/soc/codecs/ssm2602.c
@@ -32,6 +32,7 @@
 #include <linux/delay.h>
 #include <linux/pm.h>
 #include <linux/i2c.h>
+#include <linux/spi/spi.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <sound/core.h>
@@ -556,6 +557,43 @@ static struct snd_soc_codec_driver soc_codec_dev_ssm2602 = {
         .reg_cache_default = ssm2602_reg,
 };
 
+#if defined(CONFIG_SPI_MASTER)
+static int __devinit ssm2602_spi_probe(struct spi_device *spi)
+{
+        struct ssm2602_priv *ssm2602;
+        int ret;
+
+        ssm2602 = kzalloc(sizeof(struct ssm2602_priv), GFP_KERNEL);
+        if (ssm2602 == NULL)
+                return -ENOMEM;
+
+        spi_set_drvdata(spi, ssm2602);
+        ssm2602->control_type = SND_SOC_SPI;
+
+        ret = snd_soc_register_codec(&spi->dev,
+                        &soc_codec_dev_ssm2602, &ssm2602_dai, 1);
+        if (ret < 0)
+                kfree(ssm2602);
+        return ret;
+}
+
+static int __devexit ssm2602_spi_remove(struct spi_device *spi)
+{
+        snd_soc_unregister_codec(&spi->dev);
+        kfree(spi_get_drvdata(spi));
+        return 0;
+}
+
+static struct spi_driver ssm2602_spi_driver = {
+        .driver = {
+                .name   = "ssm2602",
+                .owner  = THIS_MODULE,
+        },
+        .probe          = ssm2602_spi_probe,
+        .remove         = __devexit_p(ssm2602_spi_remove),
+};
+#endif
+
 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 /*
  * ssm2602 2 wire address is determined by GPIO5
@@ -612,19 +650,29 @@ static struct i2c_driver ssm2602_i2c_driver = {
 static int __init ssm2602_modinit(void)
 {
         int ret = 0;
+
+#if defined(CONFIG_SPI_MASTER)
+        ret = spi_register_driver(&ssm2602_spi_driver);
+        if (ret)
+                return ret;
+#endif
+
 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
         ret = i2c_add_driver(&ssm2602_i2c_driver);
-        if (ret != 0) {
-                printk(KERN_ERR "Failed to register SSM2602 I2C driver: %d\n",
-                       ret);
-        }
+        if (ret)
+                return ret;
 #endif
+
         return ret;
 }
 module_init(ssm2602_modinit);
 
 static void __exit ssm2602_exit(void)
 {
+#if defined(CONFIG_SPI_MASTER)
+        spi_unregister_driver(&ssm2602_spi_driver);
+#endif
+
 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
         i2c_del_driver(&ssm2602_i2c_driver);
 #endif