[deliverable/linux.git] / sound / soc / atmel / sam9g20_wm8731.c

/*
 * sam9g20_wm8731  --  SoC audio for AT91SAM9G20-based
 * 			ATMEL AT91SAM9G20ek board.
 *
 *  Copyright (C) 2005 SAN People
 *  Copyright (C) 2008 Atmel
 *
 * Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com>
 *
 * Based on ati_b1_wm8731.c by:
 * Frank Mandarino <fmandarino@endrelia.com>
 * Copyright 2006 Endrelia Technologies Inc.
 * Based on corgi.c by:
 * Copyright 2005 Wolfson Microelectronics PLC.
 * Copyright 2005 Openedhand Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/of.h>

#include <linux/atmel-ssc.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>

#include <asm/mach-types.h>
#include <mach/hardware.h>

#include "../codecs/wm8731.h"
#include "atmel-pcm.h"
#include "atmel_ssc_dai.h"

#define MCLK_RATE 12000000

/*
 * As shipped the board does not have inputs.  However, it is relatively
 * straightforward to modify the board to hook them up so support is left
 * in the driver.
 */
#undef ENABLE_MIC_INPUT

static struct clk *mclk;

static int at91sam9g20ek_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	int ret;

	/* set codec DAI configuration */
	ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
		SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
	if (ret < 0)
		return ret;

	/* set cpu DAI configuration */
	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
		SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
	if (ret < 0)
		return ret;

	return 0;
}

static struct snd_soc_ops at91sam9g20ek_ops = {
	.hw_params = at91sam9g20ek_hw_params,
};

static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card,
					struct snd_soc_dapm_context *dapm,
					enum snd_soc_bias_level level)
{
	static int mclk_on;
	int ret = 0;

	switch (level) {
	case SND_SOC_BIAS_ON:
	case SND_SOC_BIAS_PREPARE:
		if (!mclk_on)
			ret = clk_enable(mclk);
		if (ret == 0)
			mclk_on = 1;
		break;

	case SND_SOC_BIAS_OFF:
	case SND_SOC_BIAS_STANDBY:
		if (mclk_on)
			clk_disable(mclk);
		mclk_on = 0;
		break;
	}

	return ret;
}

static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = {
	SND_SOC_DAPM_MIC("Int Mic", NULL),
	SND_SOC_DAPM_SPK("Ext Spk", NULL),
};

static const struct snd_soc_dapm_route intercon[] = {

	/* speaker connected to LHPOUT */
	{"Ext Spk", NULL, "LHPOUT"},

	/* mic is connected to Mic Jack, with WM8731 Mic Bias */
	{"MICIN", NULL, "Mic Bias"},
	{"Mic Bias", NULL, "Int Mic"},
};

/*
 * Logic for a wm8731 as connected on a at91sam9g20ek board.
 */
static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_dapm_context *dapm = &codec->dapm;
	int ret;

	printk(KERN_DEBUG
			"at91sam9g20ek_wm8731 "
			": at91sam9g20ek_wm8731_init() called\n");

	ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK,
		MCLK_RATE, SND_SOC_CLOCK_IN);
	if (ret < 0) {
		printk(KERN_ERR "Failed to set WM8731 SYSCLK: %d\n", ret);
		return ret;
	}

	/* not connected */
	snd_soc_dapm_nc_pin(dapm, "RLINEIN");
	snd_soc_dapm_nc_pin(dapm, "LLINEIN");

#ifndef ENABLE_MIC_INPUT
	snd_soc_dapm_nc_pin(&rtd->card->dapm, "Int Mic");
#endif

	return 0;
}

static struct snd_soc_dai_link at91sam9g20ek_dai = {
	.name = "WM8731",
	.stream_name = "WM8731 PCM",
	.cpu_dai_name = "at91rm9200_ssc.0",
	.codec_dai_name = "wm8731-hifi",
	.init = at91sam9g20ek_wm8731_init,
	.platform_name = "at91rm9200_ssc.0",
	.codec_name = "wm8731.0-001b",
	.ops = &at91sam9g20ek_ops,
};

static struct snd_soc_card snd_soc_at91sam9g20ek = {
	.name = "AT91SAMG20-EK",
	.owner = THIS_MODULE,
	.dai_link = &at91sam9g20ek_dai,
	.num_links = 1,
	.set_bias_level = at91sam9g20ek_set_bias_level,

	.dapm_widgets = at91sam9g20ek_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(at91sam9g20ek_dapm_widgets),
	.dapm_routes = intercon,
	.num_dapm_routes = ARRAY_SIZE(intercon),
};

static int at91sam9g20ek_audio_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	struct device_node *codec_np, *cpu_np;
	struct clk *pllb;
	struct snd_soc_card *card = &snd_soc_at91sam9g20ek;
	int ret;

	if (!np) {
		if (!(machine_is_at91sam9g20ek() ||
			machine_is_at91sam9g20ek_2mmc()))
			return -ENODEV;
	}

	ret = atmel_ssc_set_audio(0);
	if (ret) {
		dev_err(&pdev->dev, "ssc channel is not valid\n");
		return -EINVAL;
	}

	/*
	 * Codec MCLK is supplied by PCK0 - set it up.
	 */
	mclk = clk_get(NULL, "pck0");
	if (IS_ERR(mclk)) {
		printk(KERN_ERR "ASoC: Failed to get MCLK\n");
		ret = PTR_ERR(mclk);
		goto err;
	}

	pllb = clk_get(NULL, "pllb");
	if (IS_ERR(pllb)) {
		printk(KERN_ERR "ASoC: Failed to get PLLB\n");
		ret = PTR_ERR(pllb);
		goto err_mclk;
	}
	ret = clk_set_parent(mclk, pllb);
	clk_put(pllb);
	if (ret != 0) {
		printk(KERN_ERR "ASoC: Failed to set MCLK parent\n");
		goto err_mclk;
	}

	clk_set_rate(mclk, MCLK_RATE);

	card->dev = &pdev->dev;

	/* Parse device node info */
	if (np) {
		ret = snd_soc_of_parse_card_name(card, "atmel,model");
		if (ret)
			goto err;

		ret = snd_soc_of_parse_audio_routing(card,
			"atmel,audio-routing");
		if (ret)
			goto err;

		/* Parse codec info */
		at91sam9g20ek_dai.codec_name = NULL;
		codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
		if (!codec_np) {
			dev_err(&pdev->dev, "codec info missing\n");
			return -EINVAL;
		}
		at91sam9g20ek_dai.codec_of_node = codec_np;

		/* Parse dai and platform info */
		at91sam9g20ek_dai.cpu_dai_name = NULL;
		at91sam9g20ek_dai.platform_name = NULL;
		cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
		if (!cpu_np) {
			dev_err(&pdev->dev, "dai and pcm info missing\n");
			return -EINVAL;
		}
		at91sam9g20ek_dai.cpu_of_node = cpu_np;
		at91sam9g20ek_dai.platform_of_node = cpu_np;

		of_node_put(codec_np);
		of_node_put(cpu_np);
	}

	ret = snd_soc_register_card(card);
	if (ret) {
		printk(KERN_ERR "ASoC: snd_soc_register_card() failed\n");
	}

	return ret;

err_mclk:
	clk_put(mclk);
	mclk = NULL;
err:
	atmel_ssc_put_audio(0);
	return ret;
}

static int at91sam9g20ek_audio_remove(struct platform_device *pdev)
{
	struct snd_soc_card *card = platform_get_drvdata(pdev);

	clk_disable(mclk);
	mclk = NULL;
	snd_soc_unregister_card(card);
	atmel_ssc_put_audio(0);

	return 0;
}

#ifdef CONFIG_OF
static const struct of_device_id at91sam9g20ek_wm8731_dt_ids[] = {
	{ .compatible = "atmel,at91sam9g20ek-wm8731-audio", },
	{ }
};
MODULE_DEVICE_TABLE(of, at91sam9g20ek_wm8731_dt_ids);
#endif

static struct platform_driver at91sam9g20ek_audio_driver = {
	.driver = {
		.name	= "at91sam9g20ek-audio",
		.owner	= THIS_MODULE,
		.of_match_table = of_match_ptr(at91sam9g20ek_wm8731_dt_ids),
	},
	.probe	= at91sam9g20ek_audio_probe,
	.remove	= at91sam9g20ek_audio_remove,
};

module_platform_driver(at91sam9g20ek_audio_driver);

/* Module information */
MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");
MODULE_ALIAS("platform:at91sam9g20ek-audio");
MODULE_LICENSE("GPL");
Commit	Line	Data
5b99e6cc SG	1	/*
	2	* sam9g20_wm8731 -- SoC audio for AT91SAM9G20-based
	3	* ATMEL AT91SAM9G20ek board.
	4	*
	5	* Copyright (C) 2005 SAN People
	6	* Copyright (C) 2008 Atmel
	7	*
	8	* Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com>
	9	*
	10	* Based on ati_b1_wm8731.c by:
	11	* Frank Mandarino <fmandarino@endrelia.com>
	12	* Copyright 2006 Endrelia Technologies Inc.
	13	* Based on corgi.c by:
	14	* Copyright 2005 Wolfson Microelectronics PLC.
	15	* Copyright 2005 Openedhand Ltd.
	16	*
	17	* This program is free software; you can redistribute it and/or modify
	18	* it under the terms of the GNU General Public License as published by
	19	* the Free Software Foundation; either version 2 of the License, or
	20	* (at your option) any later version.
	21	*
	22	* This program is distributed in the hope that it will be useful,
	23	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	24	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	25	* GNU General Public License for more details.
	26	*
	27	* You should have received a copy of the GNU General Public License
	28	* along with this program; if not, write to the Free Software
	29	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	30	*/
	31
	32	#include <linux/module.h>
	33	#include <linux/moduleparam.h>
5b99e6cc SG	34	#include <linux/kernel.h>
	35	#include <linux/clk.h>
	36	#include <linux/timer.h>
	37	#include <linux/interrupt.h>
	38	#include <linux/platform_device.h>
5998102b	39	#include <linux/i2c.h>
8aa99652	40	#include <linux/of.h>
5b99e6cc SG	41
	42	#include <linux/atmel-ssc.h>
	43
	44	#include <sound/core.h>
	45	#include <sound/pcm.h>
	46	#include <sound/pcm_params.h>
	47	#include <sound/soc.h>
5b99e6cc	48
40135ea0	49	#include <asm/mach-types.h>
5b99e6cc	50	#include <mach/hardware.h>
5b99e6cc SG	51
	52	#include "../codecs/wm8731.h"
	53	#include "atmel-pcm.h"
	54	#include "atmel_ssc_dai.h"
	55
5de7f9b2 MB	56	#define MCLK_RATE 12000000
5de7f9b2 MB	57
22df8eb4 MB	58	/*
	59	* As shipped the board does not have inputs. However, it is relatively
	60	* straightforward to modify the board to hook them up so support is left
	61	* in the driver.
	62	*/
	63	#undef ENABLE_MIC_INPUT
	64
5de7f9b2	65	static struct clk *mclk;
5b99e6cc	66
5b99e6cc SG	67	static int at91sam9g20ek_hw_params(struct snd_pcm_substream *substream,
	68	struct snd_pcm_hw_params *params)
	69	{
	70	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad LG	71	struct snd_soc_dai *codec_dai = rtd->codec_dai;
f0fba2ad LG	72	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
5b99e6cc SG	73	int ret;
5b99e6cc SG	74
5b99e6cc SG	75	/* set codec DAI configuration */
5b99e6cc SG	76	ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S \|
2a01e5f3	77	SND_SOC_DAIFMT_NB_NF \| SND_SOC_DAIFMT_CBM_CFM);
5b99e6cc SG	78	if (ret < 0)
	79	return ret;
	80
	81	/* set cpu DAI configuration */
	82	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S \|
2a01e5f3	83	SND_SOC_DAIFMT_NB_NF \| SND_SOC_DAIFMT_CBM_CFM);
5b99e6cc SG	84	if (ret < 0)
	85	return ret;
	86
	87	return 0;
	88	}
	89
	90	static struct snd_soc_ops at91sam9g20ek_ops = {
5b99e6cc	91	.hw_params = at91sam9g20ek_hw_params,
5b99e6cc SG	92	};
5b99e6cc SG	93
5de7f9b2	94	static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card,
d4c6005f	95	struct snd_soc_dapm_context *dapm,
5de7f9b2 MB	96	enum snd_soc_bias_level level)
	97	{
	98	static int mclk_on;
	99	int ret = 0;
	100
	101	switch (level) {
	102	case SND_SOC_BIAS_ON:
	103	case SND_SOC_BIAS_PREPARE:
	104	if (!mclk_on)
	105	ret = clk_enable(mclk);
	106	if (ret == 0)
	107	mclk_on = 1;
	108	break;
	109
	110	case SND_SOC_BIAS_OFF:
	111	case SND_SOC_BIAS_STANDBY:
	112	if (mclk_on)
	113	clk_disable(mclk);
	114	mclk_on = 0;
	115	break;
	116	}
	117
	118	return ret;
	119	}
5b99e6cc SG	120
	121	static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = {
	122	SND_SOC_DAPM_MIC("Int Mic", NULL),
	123	SND_SOC_DAPM_SPK("Ext Spk", NULL),
	124	};
	125
	126	static const struct snd_soc_dapm_route intercon[] = {
	127
	128	/* speaker connected to LHPOUT */
	129	{"Ext Spk", NULL, "LHPOUT"},
	130
	131	/* mic is connected to Mic Jack, with WM8731 Mic Bias */
	132	{"MICIN", NULL, "Mic Bias"},
	133	{"Mic Bias", NULL, "Int Mic"},
	134	};
	135
	136	/*
	137	* Logic for a wm8731 as connected on a at91sam9g20ek board.
	138	*/
f0fba2ad	139	static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)
5b99e6cc	140	{
f0fba2ad LG	141	struct snd_soc_codec *codec = rtd->codec;
f0fba2ad LG	142	struct snd_soc_dai *codec_dai = rtd->codec_dai;
ce6120cc	143	struct snd_soc_dapm_context *dapm = &codec->dapm;
96fd6d47 MB	144	int ret;
96fd6d47 MB	145
5b99e6cc SG	146	printk(KERN_DEBUG
	147	"at91sam9g20ek_wm8731 "
	148	": at91sam9g20ek_wm8731_init() called\n");
	149
6bb74a72	150	ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK,
96fd6d47 MB	151	MCLK_RATE, SND_SOC_CLOCK_IN);
	152	if (ret < 0) {
	153	printk(KERN_ERR "Failed to set WM8731 SYSCLK: %d\n", ret);
	154	return ret;
	155	}
	156
5b99e6cc	157	/* not connected */
ce6120cc LG	158	snd_soc_dapm_nc_pin(dapm, "RLINEIN");
ce6120cc LG	159	snd_soc_dapm_nc_pin(dapm, "LLINEIN");
5b99e6cc	160
b0ffe9b1 LPC	161	#ifndef ENABLE_MIC_INPUT
b0ffe9b1 LPC	162	snd_soc_dapm_nc_pin(&rtd->card->dapm, "Int Mic");
22df8eb4 MB	163	#endif
22df8eb4 MB	164
5b99e6cc SG	165	return 0;
	166	}
	167
	168	static struct snd_soc_dai_link at91sam9g20ek_dai = {
	169	.name = "WM8731",
	170	.stream_name = "WM8731 PCM",
3310b57d	171	.cpu_dai_name = "at91rm9200_ssc.0",
f0fba2ad	172	.codec_dai_name = "wm8731-hifi",
5b99e6cc	173	.init = at91sam9g20ek_wm8731_init,
3310b57d	174	.platform_name = "at91rm9200_ssc.0",
99b59f3c	175	.codec_name = "wm8731.0-001b",
5b99e6cc SG	176	.ops = &at91sam9g20ek_ops,
	177	};
	178
87506549	179	static struct snd_soc_card snd_soc_at91sam9g20ek = {
7ee75380	180	.name = "AT91SAMG20-EK",
338d68db	181	.owner = THIS_MODULE,
5b99e6cc SG	182	.dai_link = &at91sam9g20ek_dai,
5b99e6cc SG	183	.num_links = 1,
5de7f9b2	184	.set_bias_level = at91sam9g20ek_set_bias_level,
b0ffe9b1 LPC	185
	186	.dapm_widgets = at91sam9g20ek_dapm_widgets,
	187	.num_dapm_widgets = ARRAY_SIZE(at91sam9g20ek_dapm_widgets),
	188	.dapm_routes = intercon,
	189	.num_dapm_routes = ARRAY_SIZE(intercon),
5b99e6cc SG	190	};
5b99e6cc SG	191
71d14ea6	192	static int at91sam9g20ek_audio_probe(struct platform_device *pdev)
5b99e6cc	193	{
531f67e4 BS	194	struct device_node *np = pdev->dev.of_node;
531f67e4 BS	195	struct device_node codec_np, cpu_np;
5de7f9b2	196	struct clk *pllb;
242b9bb8	197	struct snd_soc_card *card = &snd_soc_at91sam9g20ek;
5b99e6cc SG	198	int ret;
5b99e6cc SG	199
531f67e4 BS	200	if (!np) {
	201	if (!(machine_is_at91sam9g20ek() \|\|
	202	machine_is_at91sam9g20ek_2mmc()))
	203	return -ENODEV;
	204	}
40135ea0	205
3310b57d BS	206	ret = atmel_ssc_set_audio(0);
	207	if (ret) {
	208	dev_err(&pdev->dev, "ssc channel is not valid\n");
	209	return -EINVAL;
	210	}
	211
5de7f9b2 MB	212	/*
	213	* Codec MCLK is supplied by PCK0 - set it up.
	214	*/
	215	mclk = clk_get(NULL, "pck0");
	216	if (IS_ERR(mclk)) {
	217	printk(KERN_ERR "ASoC: Failed to get MCLK\n");
	218	ret = PTR_ERR(mclk);
	219	goto err;
	220	}
	221
	222	pllb = clk_get(NULL, "pllb");
b3915d1f	223	if (IS_ERR(pllb)) {
5de7f9b2	224	printk(KERN_ERR "ASoC: Failed to get PLLB\n");
b3915d1f	225	ret = PTR_ERR(pllb);
5de7f9b2 MB	226	goto err_mclk;
	227	}
	228	ret = clk_set_parent(mclk, pllb);
	229	clk_put(pllb);
	230	if (ret != 0) {
	231	printk(KERN_ERR "ASoC: Failed to set MCLK parent\n");
	232	goto err_mclk;
	233	}
	234
	235	clk_set_rate(mclk, MCLK_RATE);
	236
242b9bb8	237	card->dev = &pdev->dev;
531f67e4 BS	238
	239	/* Parse device node info */
	240	if (np) {
	241	ret = snd_soc_of_parse_card_name(card, "atmel,model");
	242	if (ret)
	243	goto err;
	244
	245	ret = snd_soc_of_parse_audio_routing(card,
	246	"atmel,audio-routing");
	247	if (ret)
	248	goto err;
	249
	250	/* Parse codec info */
	251	at91sam9g20ek_dai.codec_name = NULL;
	252	codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
	253	if (!codec_np) {
	254	dev_err(&pdev->dev, "codec info missing\n");
	255	return -EINVAL;
	256	}
	257	at91sam9g20ek_dai.codec_of_node = codec_np;
	258
	259	/* Parse dai and platform info */
	260	at91sam9g20ek_dai.cpu_dai_name = NULL;
	261	at91sam9g20ek_dai.platform_name = NULL;
	262	cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
	263	if (!cpu_np) {
	264	dev_err(&pdev->dev, "dai and pcm info missing\n");
	265	return -EINVAL;
	266	}
	267	at91sam9g20ek_dai.cpu_of_node = cpu_np;
	268	at91sam9g20ek_dai.platform_of_node = cpu_np;
	269
	270	of_node_put(codec_np);
	271	of_node_put(cpu_np);
	272	}
	273
242b9bb8	274	ret = snd_soc_register_card(card);
5b99e6cc	275	if (ret) {
242b9bb8	276	printk(KERN_ERR "ASoC: snd_soc_register_card() failed\n");
5b99e6cc SG	277	}
	278
	279	return ret;
	280
5de7f9b2 MB	281	err_mclk:
	282	clk_put(mclk);
	283	mclk = NULL;
	284	err:
3310b57d	285	atmel_ssc_put_audio(0);
5b99e6cc SG	286	return ret;
	287	}
	288
71d14ea6	289	static int at91sam9g20ek_audio_remove(struct platform_device *pdev)
5b99e6cc	290	{
242b9bb8 BS	291	struct snd_soc_card *card = platform_get_drvdata(pdev);
242b9bb8 BS	292
151edfc7	293	clk_disable(mclk);
5de7f9b2	294	mclk = NULL;
151edfc7 BS	295	snd_soc_unregister_card(card);
151edfc7 BS	296	atmel_ssc_put_audio(0);
242b9bb8 BS	297
242b9bb8 BS	298	return 0;
5b99e6cc SG	299	}
5b99e6cc SG	300
531f67e4 BS	301	#ifdef CONFIG_OF
	302	static const struct of_device_id at91sam9g20ek_wm8731_dt_ids[] = {
	303	{ .compatible = "atmel,at91sam9g20ek-wm8731-audio", },
	304	{ }
	305	};
	306	MODULE_DEVICE_TABLE(of, at91sam9g20ek_wm8731_dt_ids);
	307	#endif
	308
242b9bb8 BS	309	static struct platform_driver at91sam9g20ek_audio_driver = {
	310	.driver = {
	311	.name = "at91sam9g20ek-audio",
	312	.owner = THIS_MODULE,
531f67e4	313	.of_match_table = of_match_ptr(at91sam9g20ek_wm8731_dt_ids),
242b9bb8 BS	314	},
242b9bb8 BS	315	.probe = at91sam9g20ek_audio_probe,
71d14ea6	316	.remove = at91sam9g20ek_audio_remove,
242b9bb8 BS	317	};
	318
	319	module_platform_driver(at91sam9g20ek_audio_driver);
5b99e6cc SG	320
	321	/* Module information */
	322	MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
	323	MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");
242b9bb8	324	MODULE_ALIAS("platform:at91sam9g20ek-audio");
5b99e6cc	325	MODULE_LICENSE("GPL");