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Commit 5e357952 authored by Mark Brown's avatar Mark Brown Committed by Takashi Iwai
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ALSA: ASoC: Add WM8510 SPI support 



Implement SPI support for WM8510, cut'n'pasting from the support for
WM8731 contributed by Cliff Cai and Alan Horstmann since the wire format
is the same for both codecs.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent dd0c0c80

sound/soc/codecs/wm8510.c

+68 −2
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
#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>
@@ -747,6 +748,62 @@ static int wm8510_add_i2c_device(struct platform_device *pdev, 
}

#endif



#if defined(CONFIG_SPI_MASTER)

static int __devinit wm8510_spi_probe(struct spi_device *spi)

{

	struct snd_soc_device *socdev = wm8510_socdev;

	struct snd_soc_codec *codec = socdev->codec;

	int ret;



	codec->control_data = spi;



	ret = wm8510_init(socdev);

	if (ret < 0)

		dev_err(&spi->dev, "failed to initialise WM8510\n");



	return ret;

}



static int __devexit wm8510_spi_remove(struct spi_device *spi)

{

	return 0;

}



static struct spi_driver wm8510_spi_driver = {

	.driver = {

		.name	= "wm8510",

		.bus	= &spi_bus_type,

		.owner	= THIS_MODULE,

	},

	.probe		= wm8510_spi_probe,

	.remove		= __devexit_p(wm8510_spi_remove),

};



static int wm8510_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 /* CONFIG_SPI_MASTER */



static int wm8510_probe(struct platform_device *pdev)

{

	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
@@ -772,8 +829,14 @@ static int wm8510_probe(struct platform_device *pdev) 
		codec->hw_write = (hw_write_t)i2c_master_send;

		ret = wm8510_add_i2c_device(pdev, setup);

	}

#else

	/* Add other interfaces here */

#endif

#if defined(CONFIG_SPI_MASTER)

	if (setup->spi) {

		codec->hw_write = (hw_write_t)wm8510_spi_write;

		ret = spi_register_driver(&wm8510_spi_driver);

		if (ret != 0)

			printk(KERN_ERR "can't add spi driver");

	}

#endif



	if (ret != 0)
@@ -795,6 +858,9 @@ static int wm8510_remove(struct platform_device *pdev) 
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)

	i2c_unregister_device(codec->control_data);

	i2c_del_driver(&wm8510_i2c_driver);

#endif

#if defined(CONFIG_SPI_MASTER)

	spi_unregister_driver(&wm8510_spi_driver);

#endif

	kfree(codec);

sound/soc/codecs/wm8510.h

+1 −0
Original line number Diff line number Diff line
@@ -94,6 +94,7 @@ 
#define WM8510_MCLKDIV_12	(7 << 5)



struct wm8510_setup_data {

	int spi;

	int i2c_bus;

	unsigned short i2c_address;

};