From mboxrd@z Thu Jan 1 00:00:00 1970 From: voice.shen@atmel.com (Bo Shen) Date: Tue, 2 Jul 2013 11:21:15 +0800 Subject: [RFC PATCH 08/13] sound: sam9x5_wm8731: machine driver for at91sam9x5 wm8731 boards In-Reply-To: <1372667978-4718-9-git-send-email-richard.genoud@gmail.com> References: <1372667978-4718-1-git-send-email-richard.genoud@gmail.com> <1372667978-4718-9-git-send-email-richard.genoud@gmail.com> Message-ID: <51D2472B.2010407@atmel.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Richard, Will move this patch before 5, 6, 7? On 7/1/2013 16:39, Richard Genoud wrote: > From: Nicolas Ferre > > Description of the Asoc machine driver for an at91sam9x5 based board > with a wm8731 audio DAC. Wm8731 is clocked by a crystal and used as a > master on the SSC/I2S interface. Its connections are a headphone jack > and an Line input jack. > > [Richard: this is based on an old patch from Nicolas that I forward > ported and reworked to use only device tree] > > Signed-off-by: Nicolas Ferre > Signed-off-by: Uwe Kleine-K?nig > Signed-off-by: Richard Genoud > --- > sound/soc/atmel/Kconfig | 12 ++ > sound/soc/atmel/Makefile | 2 + > sound/soc/atmel/sam9x5_wm8731.c | 232 +++++++++++++++++++++++++++++++++++++++ > 3 files changed, 246 insertions(+) > create mode 100644 sound/soc/atmel/sam9x5_wm8731.c > > diff --git a/sound/soc/atmel/Kconfig b/sound/soc/atmel/Kconfig > index 3fdd87f..f24d601 100644 > --- a/sound/soc/atmel/Kconfig > +++ b/sound/soc/atmel/Kconfig > @@ -13,6 +13,7 @@ config SND_ATMEL_SOC_PDC > config SND_ATMEL_SOC_DMA > tristate > depends on SND_ATMEL_SOC > + select SND_SOC_DMAENGINE_PCM > > config SND_ATMEL_SOC_SSC > tristate > @@ -32,6 +33,17 @@ config SND_AT91_SOC_SAM9G20_WM8731 > Say Y if you want to add support for SoC audio on WM8731-based > AT91sam9g20 evaluation board. > > +config SND_AT91_SOC_SAM9X5_WM8731 > + tristate "SoC Audio support for WM8731-based at91sam9x5 board" > + depends on ATMEL_SSC && SND_ATMEL_SOC && SOC_AT91SAM9X5 > + select SND_ATMEL_SOC_SSC > + select SND_ATMEL_SOC_DMA > + select SND_ATMEL_SOC_PDC Not need to select SND_ATMEL_SOC_PDC > + select SND_SOC_WM8731 > + help > + Say Y if you want to add support for audio SoC on an > + at91sam9x5 based board that is using WM8731 codec. > + > config SND_AT91_SOC_AFEB9260 > tristate "SoC Audio support for AFEB9260 board" > depends on ARCH_AT91 && ATMEL_SSC && ARCH_AT91 && MACH_AFEB9260 && SND_ATMEL_SOC > diff --git a/sound/soc/atmel/Makefile b/sound/soc/atmel/Makefile > index 41967cc..7784c09 100644 > --- a/sound/soc/atmel/Makefile > +++ b/sound/soc/atmel/Makefile > @@ -11,6 +11,8 @@ obj-$(CONFIG_SND_ATMEL_SOC_SSC) += snd-soc-atmel_ssc_dai.o > > # AT91 Machine Support > snd-soc-sam9g20-wm8731-objs := sam9g20_wm8731.o > +snd-soc-sam9x5-wm8731-objs := sam9x5_wm8731.o > > obj-$(CONFIG_SND_AT91_SOC_SAM9G20_WM8731) += snd-soc-sam9g20-wm8731.o > +obj-$(CONFIG_SND_AT91_SOC_SAM9X5_WM8731) += snd-soc-sam9x5-wm8731.o > obj-$(CONFIG_SND_AT91_SOC_AFEB9260) += snd-soc-afeb9260.o > diff --git a/sound/soc/atmel/sam9x5_wm8731.c b/sound/soc/atmel/sam9x5_wm8731.c > new file mode 100644 > index 0000000..83ca457 > --- /dev/null > +++ b/sound/soc/atmel/sam9x5_wm8731.c > @@ -0,0 +1,232 @@ > +/* > + * sam9x5_wm8731 -- SoC audio for AT91SAM9X5-based boards > + * that are using WM8731 as codec. > + * > + * Copyright (C) 2011 Atmel, > + * Nicolas Ferre > + * > + * Based on sam9g20_wm8731.c by: > + * Sedji Gaouaou > + * > + * GPL > + */ > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +#include > + > +#include > +#include > +#include > +#include > + > +#include > +#include > +#include > + > +#include "../codecs/wm8731.h" > +#include "atmel-pcm.h" > +#include "atmel_ssc_dai.h" > + > +#define MCLK_RATE 12288000 > + > +#define DRV_NAME "sam9x5-snd-wm8731" > + > +/* > + * Audio paths on at91sam9x5ek board: > + * > + * |A| ------------> | | ---R----> Headphone Jack > + * |T| <----\ | WM | ---L--/ > + * |9| ---> CLK <--> | 8751 | <--R----- Line In Jack > + * |1| <------------ | | <--L--/ > + */ > +static const struct snd_soc_dapm_widget at91sam9x5ek_dapm_widgets[] = { > + SND_SOC_DAPM_HP("Headphone Jack", NULL), > + SND_SOC_DAPM_LINE("Line In Jack", NULL), > +}; > + > +/* > + * Logic for a wm8731 as connected on a at91sam9x5 based board. > + */ > +static int at91sam9x5ek_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; > + struct device *dev = rtd->dev; > + int ret; > + > + dev_dbg(dev, "ASoC: at91sam9x5ek_wm8731_init() called\n"); > + > + /* > + * remove some not supported rates in relation with clock > + * provided to the wm8731 codec > + */ > + switch (MCLK_RATE) { > + case 12288000: > + codec_dai->driver->playback.rates &= SNDRV_PCM_RATE_8000 | > + SNDRV_PCM_RATE_32000 | > + SNDRV_PCM_RATE_48000 | > + SNDRV_PCM_RATE_96000; > + codec_dai->driver->capture.rates &= SNDRV_PCM_RATE_8000 | > + SNDRV_PCM_RATE_32000 | > + SNDRV_PCM_RATE_48000 | > + SNDRV_PCM_RATE_96000; > + break; > + case 12000000: > + /* all wm8731 rates supported */ > + break; > + default: > + dev_err(dev, "ASoC: Codec Master clock rate not defined\n"); > + return -EINVAL; > + } Here, I think we not need to use switch ... case, as the MCLK_RATE is hard code as 12288000. ----------------------------------------------- > + /* set not connected pins */ > + snd_soc_dapm_nc_pin(dapm, "Mic Bias"); > + snd_soc_dapm_nc_pin(dapm, "MICIN"); > + snd_soc_dapm_nc_pin(dapm, "LOUT"); > + snd_soc_dapm_nc_pin(dapm, "ROUT"); > + > + /* always connected */ > + snd_soc_dapm_enable_pin(dapm, "Headphone Jack"); > + snd_soc_dapm_enable_pin(dapm, "Line In Jack"); ------------------------------------------------ This part, not needed, as to the ASoC framework will deal with it. > + /* set the codec system clock for DAC and ADC */ > + ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, > + MCLK_RATE, SND_SOC_CLOCK_IN); > + if (ret < 0) { > + dev_err(dev, "ASoC: Failed to set WM8731 SYSCLK: %d\n", ret); > + return ret; > + } > + > + /* signal a DAPM event */ > + snd_soc_dapm_sync(dapm); > + return 0; > +} > + > +static int sam9x5_wm8731_driver_probe(struct platform_device *pdev) > +{ > + struct device_node *np = pdev->dev.of_node; > + struct device_node *codec_np, *cpu_np; > + struct snd_soc_card *card; > + struct snd_soc_dai_link *dai; > + int ret; > + > + if (!np) { > + dev_err(&pdev->dev, "No device node supplied\n"); > + return -EINVAL; > + } > + > + ret = atmel_ssc_set_audio(0); > + if (ret != 0) { > + dev_err(&pdev->dev, > + "ASoC: Failed to set SSC 0 for audio: %d\n", ret); > + return ret; > + } > + > + card = devm_kzalloc(&pdev->dev, sizeof(*card), GFP_KERNEL); > + dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL); > + if (!dai || !card) { > + ret = -ENOMEM; > + goto out; > + } > + > + card->dev = &pdev->dev; > + card->owner = THIS_MODULE; > + card->dai_link = dai; > + card->num_links = 1; > + dai->name = "WM8731"; > + dai->stream_name = "WM8731 PCM"; > + dai->codec_dai_name = "wm8731-hifi"; > + dai->init = at91sam9x5ek_wm8731_init; > + card->dapm_widgets = at91sam9x5ek_dapm_widgets; > + card->num_dapm_widgets = ARRAY_SIZE(at91sam9x5ek_dapm_widgets); Will keep these as snd_soc_card and snd_soc_dai_link structure separately? > + ret = snd_soc_of_parse_card_name(card, "atmel,model"); > + if (ret) > + goto out; > + > + ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing"); > + if (ret) > + goto out; > + > + codec_np = of_parse_phandle(np, "atmel,audio-codec", 0); > + if (!codec_np) { > + dev_err(&pdev->dev, "codec info missing\n"); > + ret = -EINVAL; > + goto out; > + } > + > + dai->codec_of_node = codec_np; > + > + cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0); > + if (!cpu_np) { > + dev_err(&pdev->dev, "ssc controller node missing\n"); > + ret = -EINVAL; > + goto out; > + } > + dai->cpu_of_node = cpu_np; > + dai->platform_of_node = cpu_np; > + > + of_node_put(codec_np); > + of_node_put(cpu_np); > + > + dai->dai_fmt = snd_soc_of_parse_daifmt(np, "atmel,"); > + > + ret = snd_soc_register_card(card); > + if (ret) { > + dev_err(&pdev->dev, > + "ASoC: Platform device allocation failed\n"); > + goto out; > + } > + > + platform_set_drvdata(pdev, card); > + > + dev_info(&pdev->dev, "ASoC: at91sam9x5ek_init ok\n"); > + > + return ret; > + > +out: > + atmel_ssc_put_audio(0); > + return ret; > +} > + > +static int sam9x5_wm8731_driver_remove(struct platform_device *pdev) > +{ > + struct snd_soc_card *card = platform_get_drvdata(pdev); > + > + snd_soc_unregister_card(card); > + atmel_ssc_put_audio(0); > + > + return 0; > +} > + > +static const struct of_device_id sam9x5_wm8731_of_match[] = { > + { .compatible = "atmel,sam9x5-audio-wm8731", }, > + {}, > +}; > +MODULE_DEVICE_TABLE(of, sam9x5_wm8731_of_match); > + > +static struct platform_driver sam9x5_wm8731_driver = { > + .driver = { > + .name = DRV_NAME, > + .owner = THIS_MODULE, > + .of_match_table = of_match_ptr(sam9x5_wm8731_of_match), > + }, > + .probe = sam9x5_wm8731_driver_probe, > + .remove = sam9x5_wm8731_driver_remove, > +}; > +module_platform_driver(sam9x5_wm8731_driver); > + > +/* Module information */ > +MODULE_AUTHOR("Nicolas Ferre "); > +MODULE_AUTHOR("Richard Genoud "); > +MODULE_DESCRIPTION("ALSA SoC machine driver for AT91SAM9x5 - WM8731"); > +MODULE_LICENSE("GPL"); > +MODULE_ALIAS("platform:" DRV_NAME); > Best Regards, Bo Shen From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bo Shen Subject: Re: [RFC PATCH 08/13] sound: sam9x5_wm8731: machine driver for at91sam9x5 wm8731 boards Date: Tue, 2 Jul 2013 11:21:15 +0800 Message-ID: <51D2472B.2010407@atmel.com> References: <1372667978-4718-1-git-send-email-richard.genoud@gmail.com> <1372667978-4718-9-git-send-email-richard.genoud@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <1372667978-4718-9-git-send-email-richard.genoud@gmail.com> Sender: linux-kernel-owner@vger.kernel.org To: Richard Genoud Cc: devicetree-discuss@lists.ozlabs.org, Nicolas Ferre , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, =?UTF-8?B?VXdlIEtsZWluZS1Lw7ZuaWc=?= List-Id: devicetree@vger.kernel.org Hi Richard, Will move this patch before 5, 6, 7? On 7/1/2013 16:39, Richard Genoud wrote: > From: Nicolas Ferre > > Description of the Asoc machine driver for an at91sam9x5 based board > with a wm8731 audio DAC. Wm8731 is clocked by a crystal and used as a > master on the SSC/I2S interface. Its connections are a headphone jack > and an Line input jack. > > [Richard: this is based on an old patch from Nicolas that I forward > ported and reworked to use only device tree] > > Signed-off-by: Nicolas Ferre > Signed-off-by: Uwe Kleine-K=C3=B6nig > Signed-off-by: Richard Genoud > --- > sound/soc/atmel/Kconfig | 12 ++ > sound/soc/atmel/Makefile | 2 + > sound/soc/atmel/sam9x5_wm8731.c | 232 ++++++++++++++++++++++++++++= +++++++++++ > 3 files changed, 246 insertions(+) > create mode 100644 sound/soc/atmel/sam9x5_wm8731.c > > diff --git a/sound/soc/atmel/Kconfig b/sound/soc/atmel/Kconfig > index 3fdd87f..f24d601 100644 > --- a/sound/soc/atmel/Kconfig > +++ b/sound/soc/atmel/Kconfig > @@ -13,6 +13,7 @@ config SND_ATMEL_SOC_PDC > config SND_ATMEL_SOC_DMA > tristate > depends on SND_ATMEL_SOC > + select SND_SOC_DMAENGINE_PCM > > config SND_ATMEL_SOC_SSC > tristate > @@ -32,6 +33,17 @@ config SND_AT91_SOC_SAM9G20_WM8731 > Say Y if you want to add support for SoC audio on WM8731-based > AT91sam9g20 evaluation board. > > +config SND_AT91_SOC_SAM9X5_WM8731 > + tristate "SoC Audio support for WM8731-based at91sam9x5 board" > + depends on ATMEL_SSC && SND_ATMEL_SOC && SOC_AT91SAM9X5 > + select SND_ATMEL_SOC_SSC > + select SND_ATMEL_SOC_DMA > + select SND_ATMEL_SOC_PDC Not need to select SND_ATMEL_SOC_PDC > + select SND_SOC_WM8731 > + help > + Say Y if you want to add support for audio SoC on an > + at91sam9x5 based board that is using WM8731 codec. > + > config SND_AT91_SOC_AFEB9260 > tristate "SoC Audio support for AFEB9260 board" > depends on ARCH_AT91 && ATMEL_SSC && ARCH_AT91 && MACH_AFEB9260 &&= SND_ATMEL_SOC > diff --git a/sound/soc/atmel/Makefile b/sound/soc/atmel/Makefile > index 41967cc..7784c09 100644 > --- a/sound/soc/atmel/Makefile > +++ b/sound/soc/atmel/Makefile > @@ -11,6 +11,8 @@ obj-$(CONFIG_SND_ATMEL_SOC_SSC) +=3D snd-soc-atmel_= ssc_dai.o > > # AT91 Machine Support > snd-soc-sam9g20-wm8731-objs :=3D sam9g20_wm8731.o > +snd-soc-sam9x5-wm8731-objs :=3D sam9x5_wm8731.o > > obj-$(CONFIG_SND_AT91_SOC_SAM9G20_WM8731) +=3D snd-soc-sam9g20-wm87= 31.o > +obj-$(CONFIG_SND_AT91_SOC_SAM9X5_WM8731) +=3D snd-soc-sam9x5-wm8731.= o > obj-$(CONFIG_SND_AT91_SOC_AFEB9260) +=3D snd-soc-afeb9260.o > diff --git a/sound/soc/atmel/sam9x5_wm8731.c b/sound/soc/atmel/sam9x5= _wm8731.c > new file mode 100644 > index 0000000..83ca457 > --- /dev/null > +++ b/sound/soc/atmel/sam9x5_wm8731.c > @@ -0,0 +1,232 @@ > +/* > + * sam9x5_wm8731 -- SoC audio for AT91SAM9X5-based boards > + * that are using WM8731 as codec. > + * > + * Copyright (C) 2011 Atmel, > + * Nicolas Ferre > + * > + * Based on sam9g20_wm8731.c by: > + * Sedji Gaouaou > + * > + * GPL > + */ > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +#include > + > +#include > +#include > +#include > +#include > + > +#include > +#include > +#include > + > +#include "../codecs/wm8731.h" > +#include "atmel-pcm.h" > +#include "atmel_ssc_dai.h" > + > +#define MCLK_RATE 12288000 > + > +#define DRV_NAME "sam9x5-snd-wm8731" > + > +/* > + * Audio paths on at91sam9x5ek board: > + * > + * |A| ------------> | | ---R----> Headphone Jack > + * |T| <----\ | WM | ---L--/ > + * |9| ---> CLK <--> | 8751 | <--R----- Line In Jack > + * |1| <------------ | | <--L--/ > + */ > +static const struct snd_soc_dapm_widget at91sam9x5ek_dapm_widgets[] = =3D { > + SND_SOC_DAPM_HP("Headphone Jack", NULL), > + SND_SOC_DAPM_LINE("Line In Jack", NULL), > +}; > + > +/* > + * Logic for a wm8731 as connected on a at91sam9x5 based board. > + */ > +static int at91sam9x5ek_wm8731_init(struct snd_soc_pcm_runtime *rtd) > +{ > + struct snd_soc_codec *codec =3D rtd->codec; > + struct snd_soc_dai *codec_dai =3D rtd->codec_dai; > + struct snd_soc_dapm_context *dapm =3D &codec->dapm; > + struct device *dev =3D rtd->dev; > + int ret; > + > + dev_dbg(dev, "ASoC: at91sam9x5ek_wm8731_init() called\n"); > + > + /* > + * remove some not supported rates in relation with clock > + * provided to the wm8731 codec > + */ > + switch (MCLK_RATE) { > + case 12288000: > + codec_dai->driver->playback.rates &=3D SNDRV_PCM_RATE_8000 | > + SNDRV_PCM_RATE_32000 | > + SNDRV_PCM_RATE_48000 | > + SNDRV_PCM_RATE_96000; > + codec_dai->driver->capture.rates &=3D SNDRV_PCM_RATE_8000 | > + SNDRV_PCM_RATE_32000 | > + SNDRV_PCM_RATE_48000 | > + SNDRV_PCM_RATE_96000; > + break; > + case 12000000: > + /* all wm8731 rates supported */ > + break; > + default: > + dev_err(dev, "ASoC: Codec Master clock rate not defined\n"); > + return -EINVAL; > + } Here, I think we not need to use switch ... case, as the MCLK_RATE is=20 hard code as 12288000. ----------------------------------------------- > + /* set not connected pins */ > + snd_soc_dapm_nc_pin(dapm, "Mic Bias"); > + snd_soc_dapm_nc_pin(dapm, "MICIN"); > + snd_soc_dapm_nc_pin(dapm, "LOUT"); > + snd_soc_dapm_nc_pin(dapm, "ROUT"); > + > + /* always connected */ > + snd_soc_dapm_enable_pin(dapm, "Headphone Jack"); > + snd_soc_dapm_enable_pin(dapm, "Line In Jack"); ------------------------------------------------ This part, not needed, as to the ASoC framework will deal with it. > + /* set the codec system clock for DAC and ADC */ > + ret =3D snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, > + MCLK_RATE, SND_SOC_CLOCK_IN); > + if (ret < 0) { > + dev_err(dev, "ASoC: Failed to set WM8731 SYSCLK: %d\n", ret); > + return ret; > + } > + > + /* signal a DAPM event */ > + snd_soc_dapm_sync(dapm); > + return 0; > +} > + > +static int sam9x5_wm8731_driver_probe(struct platform_device *pdev) > +{ > + struct device_node *np =3D pdev->dev.of_node; > + struct device_node *codec_np, *cpu_np; > + struct snd_soc_card *card; > + struct snd_soc_dai_link *dai; > + int ret; > + > + if (!np) { > + dev_err(&pdev->dev, "No device node supplied\n"); > + return -EINVAL; > + } > + > + ret =3D atmel_ssc_set_audio(0); > + if (ret !=3D 0) { > + dev_err(&pdev->dev, > + "ASoC: Failed to set SSC 0 for audio: %d\n", ret); > + return ret; > + } > + > + card =3D devm_kzalloc(&pdev->dev, sizeof(*card), GFP_KERNEL); > + dai =3D devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL); > + if (!dai || !card) { > + ret =3D -ENOMEM; > + goto out; > + } > + > + card->dev =3D &pdev->dev; > + card->owner =3D THIS_MODULE; > + card->dai_link =3D dai; > + card->num_links =3D 1; > + dai->name =3D "WM8731"; > + dai->stream_name =3D "WM8731 PCM"; > + dai->codec_dai_name =3D "wm8731-hifi"; > + dai->init =3D at91sam9x5ek_wm8731_init; > + card->dapm_widgets =3D at91sam9x5ek_dapm_widgets; > + card->num_dapm_widgets =3D ARRAY_SIZE(at91sam9x5ek_dapm_widgets); Will keep these as snd_soc_card and snd_soc_dai_link structure separate= ly? > + ret =3D snd_soc_of_parse_card_name(card, "atmel,model"); > + if (ret) > + goto out; > + > + ret =3D snd_soc_of_parse_audio_routing(card, "atmel,audio-routing")= ; > + if (ret) > + goto out; > + > + codec_np =3D of_parse_phandle(np, "atmel,audio-codec", 0); > + if (!codec_np) { > + dev_err(&pdev->dev, "codec info missing\n"); > + ret =3D -EINVAL; > + goto out; > + } > + > + dai->codec_of_node =3D codec_np; > + > + cpu_np =3D of_parse_phandle(np, "atmel,ssc-controller", 0); > + if (!cpu_np) { > + dev_err(&pdev->dev, "ssc controller node missing\n"); > + ret =3D -EINVAL; > + goto out; > + } > + dai->cpu_of_node =3D cpu_np; > + dai->platform_of_node =3D cpu_np; > + > + of_node_put(codec_np); > + of_node_put(cpu_np); > + > + dai->dai_fmt =3D snd_soc_of_parse_daifmt(np, "atmel,"); > + > + ret =3D snd_soc_register_card(card); > + if (ret) { > + dev_err(&pdev->dev, > + "ASoC: Platform device allocation failed\n"); > + goto out; > + } > + > + platform_set_drvdata(pdev, card); > + > + dev_info(&pdev->dev, "ASoC: at91sam9x5ek_init ok\n"); > + > + return ret; > + > +out: > + atmel_ssc_put_audio(0); > + return ret; > +} > + > +static int sam9x5_wm8731_driver_remove(struct platform_device *pdev) > +{ > + struct snd_soc_card *card =3D platform_get_drvdata(pdev); > + > + snd_soc_unregister_card(card); > + atmel_ssc_put_audio(0); > + > + return 0; > +} > + > +static const struct of_device_id sam9x5_wm8731_of_match[] =3D { > + { .compatible =3D "atmel,sam9x5-audio-wm8731", }, > + {}, > +}; > +MODULE_DEVICE_TABLE(of, sam9x5_wm8731_of_match); > + > +static struct platform_driver sam9x5_wm8731_driver =3D { > + .driver =3D { > + .name =3D DRV_NAME, > + .owner =3D THIS_MODULE, > + .of_match_table =3D of_match_ptr(sam9x5_wm8731_of_match), > + }, > + .probe =3D sam9x5_wm8731_driver_probe, > + .remove =3D sam9x5_wm8731_driver_remove, > +}; > +module_platform_driver(sam9x5_wm8731_driver); > + > +/* Module information */ > +MODULE_AUTHOR("Nicolas Ferre "); > +MODULE_AUTHOR("Richard Genoud "); > +MODULE_DESCRIPTION("ALSA SoC machine driver for AT91SAM9x5 - WM8731"= ); > +MODULE_LICENSE("GPL"); > +MODULE_ALIAS("platform:" DRV_NAME); > Best Regards, Bo Shen