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-rw-r--r--sound/soc/codecs/wm8750.c70
-rw-r--r--sound/soc/codecs/wm8750.h1
2 files changed, 70 insertions, 1 deletions
diff --git a/sound/soc/codecs/wm8750.c b/sound/soc/codecs/wm8750.c
index 9847aa064d6b..4892e398a598 100644
--- a/sound/soc/codecs/wm8750.c
+++ b/sound/soc/codecs/wm8750.c
@@ -19,6 +19,7 @@
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
+#include <linux/spi/spi.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
@@ -841,7 +842,7 @@ static struct snd_soc_device *wm8750_socdev;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
/*
- * WM8731 2 wire address is determined by GPIO5
+ * WM8750 2 wire address is determined by GPIO5
* state during powerup.
* low = 0x1a
* high = 0x1b
@@ -928,6 +929,62 @@ err_driver:
}
#endif
+#if defined(CONFIG_SPI_MASTER)
+static int __devinit wm8750_spi_probe(struct spi_device *spi)
+{
+ struct snd_soc_device *socdev = wm8750_socdev;
+ struct snd_soc_codec *codec = socdev->codec;
+ int ret;
+
+ codec->control_data = spi;
+
+ ret = wm8750_init(socdev);
+ if (ret < 0)
+ dev_err(&spi->dev, "failed to initialise WM8750\n");
+
+ return ret;
+}
+
+static int __devexit wm8750_spi_remove(struct spi_device *spi)
+{
+ return 0;
+}
+
+static struct spi_driver wm8750_spi_driver = {
+ .driver = {
+ .name = "wm8750",
+ .bus = &spi_bus_type,
+ .owner = THIS_MODULE,
+ },
+ .probe = wm8750_spi_probe,
+ .remove = __devexit_p(wm8750_spi_remove),
+};
+
+static int wm8750_spi_write(struct spi_device *spi, const char *data, int len)
+{
+ struct spi_transfer t;
+ struct spi_message m;
+ u8 msg[2];
+
+ if (len <= 0)
+ return 0;
+
+ msg[0] = data[0];
+ msg[1] = data[1];
+
+ spi_message_init(&m);
+ memset(&t, 0, (sizeof t));
+
+ t.tx_buf = &msg[0];
+ t.len = len;
+
+ spi_message_add_tail(&t, &m);
+ spi_sync(spi, &m);
+
+ return len;
+}
+#endif
+
static int wm8750_probe(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
@@ -963,6 +1020,14 @@ static int wm8750_probe(struct platform_device *pdev)
ret = wm8750_add_i2c_device(pdev, setup);
}
#endif
+#if defined(CONFIG_SPI_MASTER)
+ if (setup->spi) {
+ codec->hw_write = (hw_write_t)wm8750_spi_write;
+ ret = spi_register_driver(&wm8750_spi_driver);
+ if (ret != 0)
+ printk(KERN_ERR "can't add spi driver");
+ }
+#endif
if (ret != 0) {
kfree(codec->private_data);
@@ -1005,6 +1070,9 @@ static int wm8750_remove(struct platform_device *pdev)
i2c_unregister_device(codec->control_data);
i2c_del_driver(&wm8750_i2c_driver);
#endif
+#if defined(CONFIG_SPI_MASTER)
+ spi_unregister_driver(&wm8750_spi_driver);
+#endif
kfree(codec->private_data);
kfree(codec);
diff --git a/sound/soc/codecs/wm8750.h b/sound/soc/codecs/wm8750.h
index fe6c80f7d9e2..1dc100e19cfe 100644
--- a/sound/soc/codecs/wm8750.h
+++ b/sound/soc/codecs/wm8750.h
@@ -58,6 +58,7 @@
#define WM8750_SYSCLK 0
struct wm8750_setup_data {
+ int spi;
int i2c_bus;
unsigned short i2c_address;
};
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