ASoC: add iPAQ hx4700 machine driver

AK4641 connected via I2S and I2C, jack detection via GPIO. Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Dmitry Artamonow <mad_soft@inbox.ru> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: add iPAQ hx4700 machine driver
AK4641 connected via I2S and I2C, jack detection via GPIO. Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Dmitry Artamonow <mad_soft@inbox.ru> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Dmitry Artamonow · Mark Brown
1 parent 00d2701070
Showing 3 changed files with 266 additions and 0 deletions Side-by-side Diff
sound/soc/pxa/Kconfig
sound/soc/pxa/Makefile
sound/soc/pxa/hx4700.c
@@ -155,6 +155,15 @@
 	help
 	  Say Y if you want to add support for SoC audio on Raumfeld devices
  
+config SND_PXA2XX_SOC_HX4700
+	tristate "SoC Audio support for HP iPAQ hx4700"
+	depends on SND_PXA2XX_SOC && MACH_H4700
+	select SND_PXA2XX_SOC_I2S
+	select SND_SOC_AK4641
+	help
+	  Say Y if you want to add support for SoC audio on the
+	  HP iPAQ hx4700.
+
 config SND_PXA2XX_SOC_MAGICIAN
 	tristate "SoC Audio support for HTC Magician"
 	depends on SND_PXA2XX_SOC && MACH_MAGICIAN
@@ -22,6 +22,7 @@
 snd-soc-saarb-objs := saarb.o
 snd-soc-tavorevb3-objs := tavorevb3.o
 snd-soc-zylonite-objs := zylonite.o
+snd-soc-hx4700-objs := hx4700.o
 snd-soc-magician-objs := magician.o
 snd-soc-mioa701-objs := mioa701_wm9713.o
 snd-soc-z2-objs := z2.o
@@ -37,6 +38,7 @@
 obj-$(CONFIG_SND_PXA2XX_SOC_SPITZ) += snd-soc-spitz.o
 obj-$(CONFIG_SND_PXA2XX_SOC_EM_X270) += snd-soc-em-x270.o
 obj-$(CONFIG_SND_PXA2XX_SOC_PALM27X) += snd-soc-palm27x.o
+obj-$(CONFIG_SND_PXA2XX_SOC_HX4700) += snd-soc-hx4700.o
 obj-$(CONFIG_SND_PXA2XX_SOC_MAGICIAN) += snd-soc-magician.o
 obj-$(CONFIG_SND_PXA2XX_SOC_MIOA701) += snd-soc-mioa701.o
 obj-$(CONFIG_SND_PXA2XX_SOC_Z2) += snd-soc-z2.o
+/*
+ * SoC audio for HP iPAQ hx4700
+ *
+ * Copyright (c) 2009 Philipp Zabel
+ *
+ *  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.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+
+#include <sound/core.h>
+#include <sound/jack.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include <mach/hx4700.h>
+#include <asm/mach-types.h>
+#include "pxa2xx-i2s.h"
+
+#include "../codecs/ak4641.h"
+
+static struct snd_soc_jack hs_jack;
+
+/* Headphones jack detection DAPM pin */
+static struct snd_soc_jack_pin hs_jack_pin[] = {
+	{
+		.pin	= "Headphone Jack",
+		.mask	= SND_JACK_HEADPHONE,
+	},
+	{
+		.pin	= "Speaker",
+		/* disable speaker when hp jack is inserted */
+		.mask   = SND_JACK_HEADPHONE,
+		.invert	= 1,
+	},
+};
+
+/* Headphones jack detection GPIO */
+static struct snd_soc_jack_gpio hs_jack_gpio = {
+	.gpio		= GPIO75_HX4700_EARPHONE_nDET,
+	.invert		= true,
+	.name		= "hp-gpio",
+	.report		= SND_JACK_HEADPHONE,
+	.debounce_time	= 200,
+};
+
+/*
+ * iPAQ hx4700 uses I2S for capture and playback.
+ */
+static int hx4700_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 = 0;
+
+	/* set codec DAI configuration */
+	ret = snd_soc_dai_set_fmt(codec_dai,
+			SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
+			SND_SOC_DAIFMT_CBS_CFS);
+	if (ret < 0)
+		return ret;
+
+	/* set cpu DAI configuration */
+	ret = snd_soc_dai_set_fmt(cpu_dai,
+			SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
+			SND_SOC_DAIFMT_CBS_CFS);
+	if (ret < 0)
+		return ret;
+
+	/* set the I2S system clock as output */
+	ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
+			SND_SOC_CLOCK_OUT);
+	if (ret < 0)
+		return ret;
+
+	/* inform codec driver about clock freq *
+	 * (PXA I2S always uses divider 256)    */
+	ret = snd_soc_dai_set_sysclk(codec_dai, 0, 256 * params_rate(params),
+			SND_SOC_CLOCK_IN);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static struct snd_soc_ops hx4700_ops = {
+	.hw_params = hx4700_hw_params,
+};
+
+static int hx4700_spk_power(struct snd_soc_dapm_widget *w,
+			    struct snd_kcontrol *k, int event)
+{
+	gpio_set_value(GPIO107_HX4700_SPK_nSD, !!SND_SOC_DAPM_EVENT_ON(event));
+	return 0;
+}
+
+static int hx4700_hp_power(struct snd_soc_dapm_widget *w,
+			   struct snd_kcontrol *k, int event)
+{
+	gpio_set_value(GPIO92_HX4700_HP_DRIVER, !!SND_SOC_DAPM_EVENT_ON(event));
+	return 0;
+}
+
+/* hx4700 machine dapm widgets */
+static const struct snd_soc_dapm_widget hx4700_dapm_widgets[] = {
+	SND_SOC_DAPM_HP("Headphone Jack", hx4700_hp_power),
+	SND_SOC_DAPM_SPK("Speaker", hx4700_spk_power),
+	SND_SOC_DAPM_MIC("Built-in Microphone", NULL),
+};
+
+/* hx4700 machine audio_map */
+static const struct snd_soc_dapm_route hx4700_audio_map[] = {
+
+	/* Headphone connected to LOUT, ROUT */
+	{"Headphone Jack", NULL, "LOUT"},
+	{"Headphone Jack", NULL, "ROUT"},
+
+	/* Speaker connected to MOUT2 */
+	{"Speaker", NULL, "MOUT2"},
+
+	/* Microphone connected to MICIN */
+	{"MICIN", NULL, "Built-in Microphone"},
+	{"AIN", NULL, "MICOUT"},
+};
+
+/*
+ * Logic for a ak4641 as connected on a HP iPAQ hx4700
+ */
+static int hx4700_ak4641_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_codec *codec = rtd->codec;
+	struct snd_soc_dapm_context *dapm = &codec->dapm;
+	int err;
+
+	/* NC codec pins */
+	/* FIXME: is anything connected here? */
+	snd_soc_dapm_nc_pin(dapm, "MOUT1");
+	snd_soc_dapm_nc_pin(dapm, "MICEXT");
+	snd_soc_dapm_nc_pin(dapm, "AUX");
+
+	/* Jack detection API stuff */
+	err = snd_soc_jack_new(codec, "Headphone Jack",
+				SND_JACK_HEADPHONE, &hs_jack);
+	if (err)
+		return err;
+
+	err = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pin),
+					hs_jack_pin);
+	if (err)
+		return err;
+
+	err = snd_soc_jack_add_gpios(&hs_jack, 1, &hs_jack_gpio);
+
+	return err;
+}
+
+/* hx4700 digital audio interface glue - connects codec <--> CPU */
+static struct snd_soc_dai_link hx4700_dai = {
+	.name = "ak4641",
+	.stream_name = "AK4641",
+	.cpu_dai_name = "pxa2xx-i2s",
+	.codec_dai_name = "ak4641-hifi",
+	.platform_name = "pxa-pcm-audio",
+	.codec_name = "ak4641.0-0012",
+	.init = hx4700_ak4641_init,
+	.ops = &hx4700_ops,
+};
+
+/* hx4700 audio machine driver */
+static struct snd_soc_card snd_soc_card_hx4700 = {
+	.name			= "iPAQ hx4700",
+	.dai_link		= &hx4700_dai,
+	.num_links		= 1,
+	.dapm_widgets		= hx4700_dapm_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(hx4700_dapm_widgets),
+	.dapm_routes		= hx4700_audio_map,
+	.num_dapm_routes	= ARRAY_SIZE(hx4700_audio_map),
+};
+
+static struct gpio hx4700_audio_gpios[] = {
+	{ GPIO107_HX4700_SPK_nSD, GPIOF_OUT_INIT_HIGH, "SPK_POWER" },
+	{ GPIO92_HX4700_HP_DRIVER, GPIOF_OUT_INIT_LOW, "EP_POWER" },
+};
+
+static int __devinit hx4700_audio_probe(struct platform_device *pdev)
+{
+	int ret;
+
+	if (!machine_is_h4700())
+		return -ENODEV;
+
+	ret = gpio_request_array(hx4700_audio_gpios,
+				ARRAY_SIZE(hx4700_audio_gpios));
+	if (ret)
+		return ret;
+
+	snd_soc_card_hx4700.dev = &pdev->dev;
+	ret = snd_soc_register_card(&snd_soc_card_hx4700);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int __devexit hx4700_audio_remove(struct platform_device *pdev)
+{
+	snd_soc_jack_free_gpios(&hs_jack, 1, &hs_jack_gpio);
+	snd_soc_unregister_card(&snd_soc_card_hx4700);
+
+	gpio_set_value(GPIO92_HX4700_HP_DRIVER, 0);
+	gpio_set_value(GPIO107_HX4700_SPK_nSD, 0);
+
+	gpio_free_array(hx4700_audio_gpios, ARRAY_SIZE(hx4700_audio_gpios));
+	return 0;
+}
+
+static struct platform_driver hx4700_audio_driver = {
+	.driver	= {
+		.name = "hx4700-audio",
+		.owner = THIS_MODULE,
+		.pm = &snd_soc_pm_ops,
+	},
+	.probe	= hx4700_audio_probe,
+	.remove	= __devexit_p(hx4700_audio_remove),
+};
+
+static int __init hx4700_modinit(void)
+{
+	return platform_driver_register(&hx4700_audio_driver);
+}
+module_init(hx4700_modinit);
+
+static void __exit hx4700_modexit(void)
+{
+	platform_driver_unregister(&hx4700_audio_driver);
+}
+
+module_exit(hx4700_modexit);
+
+MODULE_AUTHOR("Philipp Zabel");
+MODULE_DESCRIPTION("ALSA SoC iPAQ hx4700");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:hx4700-audio");
...	...	@@ -155,6 +155,15 @@
155	155	help
156	156	Say Y if you want to add support for SoC audio on Raumfeld devices
157	157
	158	+config SND_PXA2XX_SOC_HX4700
	159	+ tristate "SoC Audio support for HP iPAQ hx4700"
	160	+ depends on SND_PXA2XX_SOC && MACH_H4700
	161	+ select SND_PXA2XX_SOC_I2S
	162	+ select SND_SOC_AK4641
	163	+ help
	164	+ Say Y if you want to add support for SoC audio on the
	165	+ HP iPAQ hx4700.
	166	+
158	167	config SND_PXA2XX_SOC_MAGICIAN
159	168	tristate "SoC Audio support for HTC Magician"
160	169	depends on SND_PXA2XX_SOC && MACH_MAGICIAN
...	...	@@ -22,6 +22,7 @@
22	22	snd-soc-saarb-objs := saarb.o
23	23	snd-soc-tavorevb3-objs := tavorevb3.o
24	24	snd-soc-zylonite-objs := zylonite.o
	25	+snd-soc-hx4700-objs := hx4700.o
25	26	snd-soc-magician-objs := magician.o
26	27	snd-soc-mioa701-objs := mioa701_wm9713.o
27	28	snd-soc-z2-objs := z2.o
...	...	@@ -37,6 +38,7 @@
37	38	obj-$(CONFIG_SND_PXA2XX_SOC_SPITZ) += snd-soc-spitz.o
38	39	obj-$(CONFIG_SND_PXA2XX_SOC_EM_X270) += snd-soc-em-x270.o
39	40	obj-$(CONFIG_SND_PXA2XX_SOC_PALM27X) += snd-soc-palm27x.o
	41	+obj-$(CONFIG_SND_PXA2XX_SOC_HX4700) += snd-soc-hx4700.o
40	42	obj-$(CONFIG_SND_PXA2XX_SOC_MAGICIAN) += snd-soc-magician.o
41	43	obj-$(CONFIG_SND_PXA2XX_SOC_MIOA701) += snd-soc-mioa701.o
42	44	obj-$(CONFIG_SND_PXA2XX_SOC_Z2) += snd-soc-z2.o
	1	+/*
	2	+ * SoC audio for HP iPAQ hx4700
	3	+ *
	4	+ * Copyright (c) 2009 Philipp Zabel
	5	+ *
	6	+ * This program is free software; you can redistribute it and/or modify it
	7	+ * under the terms of the GNU General Public License as published by the
	8	+ * Free Software Foundation; either version 2 of the License, or (at your
	9	+ * option) any later version.
	10	+ *
	11	+ */
	12	+
	13	+#include <linux/module.h>
	14	+#include <linux/timer.h>
	15	+#include <linux/interrupt.h>
	16	+#include <linux/platform_device.h>
	17	+#include <linux/delay.h>
	18	+#include <linux/gpio.h>
	19	+
	20	+#include <sound/core.h>
	21	+#include <sound/jack.h>
	22	+#include <sound/pcm.h>
	23	+#include <sound/pcm_params.h>
	24	+#include <sound/soc.h>
	25	+
	26	+#include <mach/hx4700.h>
	27	+#include <asm/mach-types.h>
	28	+#include "pxa2xx-i2s.h"
	29	+
	30	+#include "../codecs/ak4641.h"
	31	+
	32	+static struct snd_soc_jack hs_jack;
	33	+
	34	+/* Headphones jack detection DAPM pin */
	35	+static struct snd_soc_jack_pin hs_jack_pin[] = {
	36	+ {
	37	+ .pin = "Headphone Jack",
	38	+ .mask = SND_JACK_HEADPHONE,
	39	+ },
	40	+ {
	41	+ .pin = "Speaker",
	42	+ /* disable speaker when hp jack is inserted */
	43	+ .mask = SND_JACK_HEADPHONE,
	44	+ .invert = 1,
	45	+ },
	46	+};
	47	+
	48	+/* Headphones jack detection GPIO */
	49	+static struct snd_soc_jack_gpio hs_jack_gpio = {
	50	+ .gpio = GPIO75_HX4700_EARPHONE_nDET,
	51	+ .invert = true,
	52	+ .name = "hp-gpio",
	53	+ .report = SND_JACK_HEADPHONE,
	54	+ .debounce_time = 200,
	55	+};
	56	+
	57	+/*
	58	+ * iPAQ hx4700 uses I2S for capture and playback.
	59	+ */
	60	+static int hx4700_hw_params(struct snd_pcm_substream *substream,
	61	+ struct snd_pcm_hw_params *params)
	62	+{
	63	+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
	64	+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
	65	+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	66	+ int ret = 0;
	67	+
	68	+ /* set codec DAI configuration */
	69	+ ret = snd_soc_dai_set_fmt(codec_dai,
	70	+ SND_SOC_DAIFMT_MSB \| SND_SOC_DAIFMT_NB_NF \|
	71	+ SND_SOC_DAIFMT_CBS_CFS);
	72	+ if (ret < 0)
	73	+ return ret;
	74	+
	75	+ /* set cpu DAI configuration */
	76	+ ret = snd_soc_dai_set_fmt(cpu_dai,
	77	+ SND_SOC_DAIFMT_MSB \| SND_SOC_DAIFMT_NB_NF \|
	78	+ SND_SOC_DAIFMT_CBS_CFS);
	79	+ if (ret < 0)
	80	+ return ret;
	81	+
	82	+ /* set the I2S system clock as output */
	83	+ ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
	84	+ SND_SOC_CLOCK_OUT);
	85	+ if (ret < 0)
	86	+ return ret;
	87	+
	88	+ /* inform codec driver about clock freq *
	89	+ * (PXA I2S always uses divider 256) */
	90	+ ret = snd_soc_dai_set_sysclk(codec_dai, 0, 256 * params_rate(params),
	91	+ SND_SOC_CLOCK_IN);
	92	+ if (ret < 0)
	93	+ return ret;
	94	+
	95	+ return 0;
	96	+}
	97	+
	98	+static struct snd_soc_ops hx4700_ops = {
	99	+ .hw_params = hx4700_hw_params,
	100	+};
	101	+
	102	+static int hx4700_spk_power(struct snd_soc_dapm_widget *w,
	103	+ struct snd_kcontrol *k, int event)
	104	+{
	105	+ gpio_set_value(GPIO107_HX4700_SPK_nSD, !!SND_SOC_DAPM_EVENT_ON(event));
	106	+ return 0;
	107	+}
	108	+
	109	+static int hx4700_hp_power(struct snd_soc_dapm_widget *w,
	110	+ struct snd_kcontrol *k, int event)
	111	+{
	112	+ gpio_set_value(GPIO92_HX4700_HP_DRIVER, !!SND_SOC_DAPM_EVENT_ON(event));
	113	+ return 0;
	114	+}
	115	+
	116	+/* hx4700 machine dapm widgets */
	117	+static const struct snd_soc_dapm_widget hx4700_dapm_widgets[] = {
	118	+ SND_SOC_DAPM_HP("Headphone Jack", hx4700_hp_power),
	119	+ SND_SOC_DAPM_SPK("Speaker", hx4700_spk_power),
	120	+ SND_SOC_DAPM_MIC("Built-in Microphone", NULL),
	121	+};
	122	+
	123	+/* hx4700 machine audio_map */
	124	+static const struct snd_soc_dapm_route hx4700_audio_map[] = {
	125	+
	126	+ /* Headphone connected to LOUT, ROUT */
	127	+ {"Headphone Jack", NULL, "LOUT"},
	128	+ {"Headphone Jack", NULL, "ROUT"},
	129	+
	130	+ /* Speaker connected to MOUT2 */
	131	+ {"Speaker", NULL, "MOUT2"},
	132	+
	133	+ /* Microphone connected to MICIN */
	134	+ {"MICIN", NULL, "Built-in Microphone"},
	135	+ {"AIN", NULL, "MICOUT"},
	136	+};
	137	+
	138	+/*
	139	+ * Logic for a ak4641 as connected on a HP iPAQ hx4700
	140	+ */
	141	+static int hx4700_ak4641_init(struct snd_soc_pcm_runtime *rtd)
	142	+{
	143	+ struct snd_soc_codec *codec = rtd->codec;
	144	+ struct snd_soc_dapm_context *dapm = &codec->dapm;
	145	+ int err;
	146	+
	147	+ /* NC codec pins */
	148	+ /* FIXME: is anything connected here? */
	149	+ snd_soc_dapm_nc_pin(dapm, "MOUT1");
	150	+ snd_soc_dapm_nc_pin(dapm, "MICEXT");
	151	+ snd_soc_dapm_nc_pin(dapm, "AUX");
	152	+
	153	+ /* Jack detection API stuff */
	154	+ err = snd_soc_jack_new(codec, "Headphone Jack",
	155	+ SND_JACK_HEADPHONE, &hs_jack);
	156	+ if (err)
	157	+ return err;
	158	+
	159	+ err = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pin),
	160	+ hs_jack_pin);
	161	+ if (err)
	162	+ return err;
	163	+
	164	+ err = snd_soc_jack_add_gpios(&hs_jack, 1, &hs_jack_gpio);
	165	+
	166	+ return err;
	167	+}
	168	+
	169	+/* hx4700 digital audio interface glue - connects codec <--> CPU */
	170	+static struct snd_soc_dai_link hx4700_dai = {
	171	+ .name = "ak4641",
	172	+ .stream_name = "AK4641",
	173	+ .cpu_dai_name = "pxa2xx-i2s",
	174	+ .codec_dai_name = "ak4641-hifi",
	175	+ .platform_name = "pxa-pcm-audio",
	176	+ .codec_name = "ak4641.0-0012",
	177	+ .init = hx4700_ak4641_init,
	178	+ .ops = &hx4700_ops,
	179	+};
	180	+
	181	+/* hx4700 audio machine driver */
	182	+static struct snd_soc_card snd_soc_card_hx4700 = {
	183	+ .name = "iPAQ hx4700",
	184	+ .dai_link = &hx4700_dai,
	185	+ .num_links = 1,
	186	+ .dapm_widgets = hx4700_dapm_widgets,
	187	+ .num_dapm_widgets = ARRAY_SIZE(hx4700_dapm_widgets),
	188	+ .dapm_routes = hx4700_audio_map,
	189	+ .num_dapm_routes = ARRAY_SIZE(hx4700_audio_map),
	190	+};
	191	+
	192	+static struct gpio hx4700_audio_gpios[] = {
	193	+ { GPIO107_HX4700_SPK_nSD, GPIOF_OUT_INIT_HIGH, "SPK_POWER" },
	194	+ { GPIO92_HX4700_HP_DRIVER, GPIOF_OUT_INIT_LOW, "EP_POWER" },
	195	+};
	196	+
	197	+static int __devinit hx4700_audio_probe(struct platform_device *pdev)
	198	+{
	199	+ int ret;
	200	+
	201	+ if (!machine_is_h4700())
	202	+ return -ENODEV;
	203	+
	204	+ ret = gpio_request_array(hx4700_audio_gpios,
	205	+ ARRAY_SIZE(hx4700_audio_gpios));
	206	+ if (ret)
	207	+ return ret;
	208	+
	209	+ snd_soc_card_hx4700.dev = &pdev->dev;
	210	+ ret = snd_soc_register_card(&snd_soc_card_hx4700);
	211	+ if (ret)
	212	+ return ret;
	213	+
	214	+ return 0;
	215	+}
	216	+
	217	+static int __devexit hx4700_audio_remove(struct platform_device *pdev)
	218	+{
	219	+ snd_soc_jack_free_gpios(&hs_jack, 1, &hs_jack_gpio);
	220	+ snd_soc_unregister_card(&snd_soc_card_hx4700);
	221	+
	222	+ gpio_set_value(GPIO92_HX4700_HP_DRIVER, 0);
	223	+ gpio_set_value(GPIO107_HX4700_SPK_nSD, 0);
	224	+
	225	+ gpio_free_array(hx4700_audio_gpios, ARRAY_SIZE(hx4700_audio_gpios));
	226	+ return 0;
	227	+}
	228	+
	229	+static struct platform_driver hx4700_audio_driver = {
	230	+ .driver = {
	231	+ .name = "hx4700-audio",
	232	+ .owner = THIS_MODULE,
	233	+ .pm = &snd_soc_pm_ops,
	234	+ },
	235	+ .probe = hx4700_audio_probe,
	236	+ .remove = __devexit_p(hx4700_audio_remove),
	237	+};
	238	+
	239	+static int __init hx4700_modinit(void)
	240	+{
	241	+ return platform_driver_register(&hx4700_audio_driver);
	242	+}
	243	+module_init(hx4700_modinit);
	244	+
	245	+static void __exit hx4700_modexit(void)
	246	+{
	247	+ platform_driver_unregister(&hx4700_audio_driver);
	248	+}
	249	+
	250	+module_exit(hx4700_modexit);
	251	+
	252	+MODULE_AUTHOR("Philipp Zabel");
	253	+MODULE_DESCRIPTION("ALSA SoC iPAQ hx4700");
	254	+MODULE_LICENSE("GPL");
	255	+MODULE_ALIAS("platform:hx4700-audio");