ASoC: sti-sas: Add sti platform codec (32a726b2) · Commits · e / devices / android_kernel_teracube_2e

sound/soc/codecs/Kconfig

+5 −0

Original line number	Diff line number	Diff line
		@@ -102,6 +102,7 @@ config SND_SOC_ALL_CODECS
		select SND_SOC_STA350 if I2C
		select SND_SOC_STA529 if I2C
		select SND_SOC_STAC9766 if SND_SOC_AC97_BUS
		select SND_SOC_STI_SAS
		select SND_SOC_TAS2552 if I2C
		select SND_SOC_TAS5086 if I2C
		select SND_SOC_TAS571X if I2C
		@@ -610,6 +611,10 @@ config SND_SOC_STA529
		config SND_SOC_STAC9766
		tristate

		config SND_SOC_STI_SAS
		tristate "codec Audio support for STI SAS codec"
		depends on SND_SOC_STI

		config SND_SOC_TAS2552
		tristate "Texas Instruments TAS2552 Mono Audio amplifier"
		depends on I2C

sound/soc/codecs/Makefile

+2 −0

Original line number	Diff line number	Diff line
		@@ -106,6 +106,7 @@ snd-soc-sta32x-objs := sta32x.o
		snd-soc-sta350-objs := sta350.o
		snd-soc-sta529-objs := sta529.o
		snd-soc-stac9766-objs := stac9766.o
		snd-soc-sti-sas-objs := sti-sas.o
		snd-soc-tas5086-objs := tas5086.o
		snd-soc-tas571x-objs := tas571x.o
		snd-soc-tfa9879-objs := tfa9879.o
		@@ -289,6 +290,7 @@ obj-$(CONFIG_SND_SOC_STA32X) += snd-soc-sta32x.o
		obj-$(CONFIG_SND_SOC_STA350) += snd-soc-sta350.o
		obj-$(CONFIG_SND_SOC_STA529) += snd-soc-sta529.o
		obj-$(CONFIG_SND_SOC_STAC9766) += snd-soc-stac9766.o
		obj-$(CONFIG_SND_SOC_STI_SAS) += snd-soc-sti-sas.o
		obj-$(CONFIG_SND_SOC_TAS2552) += snd-soc-tas2552.o
		obj-$(CONFIG_SND_SOC_TAS5086) += snd-soc-tas5086.o
		obj-$(CONFIG_SND_SOC_TAS571X) += snd-soc-tas571x.o

sound/soc/codecs/sti-sas.c

0 → 100644

+627 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) STMicroelectronics SA 2015
		* Authors: Arnaud Pouliquen <arnaud.pouliquen@st.com>
		* for STMicroelectronics.
		* License terms: GNU General Public License (GPL), version 2
		*/

		#include <linux/io.h>
		#include <linux/module.h>
		#include <linux/regmap.h>
		#include <linux/reset.h>
		#include <linux/mfd/syscon.h>

		#include <sound/soc.h>
		#include <sound/soc-dapm.h>

		/* chipID supported */
		#define CHIPID_STIH416 0
		#define CHIPID_STIH407 1

		/* DAC definitions */

		/* stih416 DAC registers */
		/* sysconf 2517: Audio-DAC-Control */
		#define STIH416_AUDIO_DAC_CTRL 0x00000814
		/* sysconf 2519: Audio-Gue-Control */
		#define STIH416_AUDIO_GLUE_CTRL 0x0000081C

		#define STIH416_DAC_NOT_STANDBY 0x3
		#define STIH416_DAC_SOFTMUTE 0x4
		#define STIH416_DAC_ANA_NOT_PWR 0x5
		#define STIH416_DAC_NOT_PNDBG 0x6

		#define STIH416_DAC_NOT_STANDBY_MASK BIT(STIH416_DAC_NOT_STANDBY)
		#define STIH416_DAC_SOFTMUTE_MASK BIT(STIH416_DAC_SOFTMUTE)
		#define STIH416_DAC_ANA_NOT_PWR_MASK BIT(STIH416_DAC_ANA_NOT_PWR)
		#define STIH416_DAC_NOT_PNDBG_MASK BIT(STIH416_DAC_NOT_PNDBG)

		/* stih407 DAC registers */
		/* sysconf 5041: Audio-Gue-Control */
		#define STIH407_AUDIO_GLUE_CTRL 0x000000A4
		/* sysconf 5042: Audio-DAC-Control */
		#define STIH407_AUDIO_DAC_CTRL 0x000000A8

		/* DAC definitions */
		#define STIH407_DAC_SOFTMUTE 0x0
		#define STIH407_DAC_STANDBY_ANA 0x1
		#define STIH407_DAC_STANDBY 0x2

		#define STIH407_DAC_SOFTMUTE_MASK BIT(STIH407_DAC_SOFTMUTE)
		#define STIH407_DAC_STANDBY_ANA_MASK BIT(STIH407_DAC_STANDBY_ANA)
		#define STIH407_DAC_STANDBY_MASK BIT(STIH407_DAC_STANDBY)

		/* SPDIF definitions */
		#define SPDIF_BIPHASE_ENABLE 0x6
		#define SPDIF_BIPHASE_IDLE 0x7

		#define SPDIF_BIPHASE_ENABLE_MASK BIT(SPDIF_BIPHASE_ENABLE)
		#define SPDIF_BIPHASE_IDLE_MASK BIT(SPDIF_BIPHASE_IDLE)

		enum {
		STI_SAS_DAI_SPDIF_OUT,
		STI_SAS_DAI_ANALOG_OUT,
		};

		static const struct reg_default stih416_sas_reg_defaults[] = {
		{ STIH407_AUDIO_GLUE_CTRL, 0x00000040 },
		{ STIH407_AUDIO_DAC_CTRL, 0x000000000 },
		};

		static const struct reg_default stih407_sas_reg_defaults[] = {
		{ STIH416_AUDIO_DAC_CTRL, 0x000000000 },
		{ STIH416_AUDIO_GLUE_CTRL, 0x00000040 },
		};

		struct sti_dac_audio {
		struct regmap *regmap;
		struct regmap *virt_regmap;
		struct regmap_field **field;
		struct reset_control *rst;
		int mclk;
		};

		struct sti_spdif_audio {
		struct regmap *regmap;
		struct regmap_field **field;
		int mclk;
		};

		/* device data structure */
		struct sti_sas_dev_data {
		const int chipid; /* IC version */
		const struct regmap_config *regmap;
		const struct snd_soc_dai_ops dac_ops; / DAC function callbacks */
		const struct snd_soc_dapm_widget dapm_widgets; / dapms declaration */
		const int num_dapm_widgets; /* dapms declaration */
		const struct snd_soc_dapm_route dapm_routes; / route declaration */
		const int num_dapm_routes; /* route declaration */
		};

		/* driver data structure */
		struct sti_sas_data {
		struct device *dev;
		const struct sti_sas_dev_data *dev_data;
		struct sti_dac_audio dac;
		struct sti_spdif_audio spdif;
		};

		/* Read a register from the sysconf reg bank */
		static int sti_sas_read_reg(void *context, unsigned int reg,
		unsigned int *value)
		{
		struct sti_sas_data *drvdata = context;
		int status;
		u32 val;

		status = regmap_read(drvdata->dac.regmap, reg, &val);
		*value = (unsigned int)val;

		return status;
		}

		/* Read a register from the sysconf reg bank */
		static int sti_sas_write_reg(void *context, unsigned int reg,
		unsigned int value)
		{
		struct sti_sas_data *drvdata = context;
		int status;

		status = regmap_write(drvdata->dac.regmap, reg, value);

		return status;
		}

		static int sti_sas_init_sas_registers(struct snd_soc_codec *codec,
		struct sti_sas_data *data)
		{
		int ret;
		/*
		* DAC and SPDIF are activated by default
		* put them in IDLE to save power
		*/

		/* Initialise bi-phase formatter to disabled */
		ret = snd_soc_update_bits(codec, STIH407_AUDIO_GLUE_CTRL,
		SPDIF_BIPHASE_ENABLE_MASK, 0);

		if (!ret)
		/* Initialise bi-phase formatter idle value to 0 */
		ret = snd_soc_update_bits(codec, STIH407_AUDIO_GLUE_CTRL,
		SPDIF_BIPHASE_IDLE_MASK, 0);
		if (ret < 0) {
		dev_err(codec->dev, "Failed to update SPDIF registers");
		return ret;
		}

		/* Init DAC configuration */
		switch (data->dev_data->chipid) {
		case CHIPID_STIH407:
		/* init configuration */
		ret = snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL,
		STIH407_DAC_STANDBY_MASK,
		STIH407_DAC_STANDBY_MASK);

		if (!ret)
		ret = snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL,
		STIH407_DAC_STANDBY_ANA_MASK,
		STIH407_DAC_STANDBY_ANA_MASK);
		if (!ret)
		ret = snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL,
		STIH407_DAC_SOFTMUTE_MASK,
		STIH407_DAC_SOFTMUTE_MASK);
		break;
		case CHIPID_STIH416:
		ret = snd_soc_update_bits(codec, STIH416_AUDIO_DAC_CTRL,
		STIH416_DAC_NOT_STANDBY_MASK, 0);
		if (!ret)
		ret = snd_soc_update_bits(codec,
		STIH416_AUDIO_DAC_CTRL,
		STIH416_DAC_ANA_NOT_PWR, 0);
		if (!ret)
		ret = snd_soc_update_bits(codec,
		STIH416_AUDIO_DAC_CTRL,
		STIH416_DAC_NOT_PNDBG_MASK,
		0);
		if (!ret)
		ret = snd_soc_update_bits(codec,
		STIH416_AUDIO_DAC_CTRL,
		STIH416_DAC_SOFTMUTE_MASK,
		STIH416_DAC_SOFTMUTE_MASK);
		break;
		default:
		return -EINVAL;
		}

		if (ret < 0) {
		dev_err(codec->dev, "Failed to update DAC registers");
		return ret;
		}

		return ret;
		}

		/*
		* DAC
		*/
		static int sti_sas_dac_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
		{
		/* Sanity check only */
		if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
		dev_err(dai->codec->dev,
		"%s: ERROR: Unsupporter master mask 0x%x\n",
		__func__, fmt & SND_SOC_DAIFMT_MASTER_MASK);
		return -EINVAL;
		}

		return 0;
		}

		static int stih416_dac_probe(struct snd_soc_dai *dai)
		{
		struct snd_soc_codec *codec = dai->codec;
		struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev);
		struct sti_dac_audio *dac = &drvdata->dac;

		/* Get reset control */
		dac->rst = devm_reset_control_get(codec->dev, "dac_rst");
		if (IS_ERR(dac->rst)) {
		dev_err(dai->codec->dev,
		"%s: ERROR: DAC reset control not defined (%d)!\n",
		__func__, (int)dac->rst);
		dac->rst = NULL;
		return -EFAULT;
		}
		/* Put the DAC into reset */
		reset_control_assert(dac->rst);

		return 0;
		}

		const struct snd_soc_dapm_widget stih416_sas_dapm_widgets[] = {
		SND_SOC_DAPM_PGA("DAC bandgap", STIH416_AUDIO_DAC_CTRL,
		STIH416_DAC_NOT_PNDBG_MASK, 0, NULL, 0),
		SND_SOC_DAPM_OUT_DRV("DAC standby ana", STIH416_AUDIO_DAC_CTRL,
		STIH416_DAC_ANA_NOT_PWR, 0, NULL, 0),
		SND_SOC_DAPM_DAC("DAC standby", "dac_p", STIH416_AUDIO_DAC_CTRL,
		STIH416_DAC_NOT_STANDBY, 0),
		SND_SOC_DAPM_OUTPUT("DAC Output"),
		};

		const struct snd_soc_dapm_widget stih407_sas_dapm_widgets[] = {
		SND_SOC_DAPM_OUT_DRV("DAC standby ana", STIH407_AUDIO_DAC_CTRL,
		STIH407_DAC_STANDBY_ANA, 1, NULL, 0),
		SND_SOC_DAPM_DAC("DAC standby", "dac_p", STIH407_AUDIO_DAC_CTRL,
		STIH407_DAC_STANDBY, 1),
		SND_SOC_DAPM_OUTPUT("DAC Output"),
		};

		const struct snd_soc_dapm_route stih416_sas_route[] = {
		{"DAC Output", NULL, "DAC bandgap"},
		{"DAC Output", NULL, "DAC standby ana"},
		{"DAC standby ana", NULL, "DAC standby"},
		};

		const struct snd_soc_dapm_route stih407_sas_route[] = {
		{"DAC Output", NULL, "DAC standby ana"},
		{"DAC standby ana", NULL, "DAC standby"},
		};

		static int stih416_sas_dac_mute(struct snd_soc_dai *dai, int mute, int stream)
		{
		struct snd_soc_codec *codec = dai->codec;

		if (mute) {
		return snd_soc_update_bits(codec, STIH416_AUDIO_DAC_CTRL,
		STIH416_DAC_SOFTMUTE_MASK,
		STIH416_DAC_SOFTMUTE_MASK);
		} else {
		return snd_soc_update_bits(codec, STIH416_AUDIO_DAC_CTRL,
		STIH416_DAC_SOFTMUTE_MASK, 0);
		}
		}

		static int stih407_sas_dac_mute(struct snd_soc_dai *dai, int mute, int stream)
		{
		struct snd_soc_codec *codec = dai->codec;

		if (mute) {
		return snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL,
		STIH407_DAC_SOFTMUTE_MASK,
		STIH407_DAC_SOFTMUTE_MASK);
		} else {
		return snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL,
		STIH407_DAC_SOFTMUTE_MASK,
		0);
		}
		}

		/*
		* SPDIF
		*/
		static int sti_sas_spdif_set_fmt(struct snd_soc_dai *dai,
		unsigned int fmt)
		{
		if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
		dev_err(dai->codec->dev,
		"%s: ERROR: Unsupporter master mask 0x%x\n",
		__func__, fmt & SND_SOC_DAIFMT_MASTER_MASK);
		return -EINVAL;
		}

		return 0;
		}

		/*
		* sti_sas_spdif_trigger:
		* Trigger function is used to ensure that BiPhase Formater is disabled
		* before CPU dai is stopped.
		* This is mandatory to avoid that BPF is stalled
		*/
		static int sti_sas_spdif_trigger(struct snd_pcm_substream *substream, int cmd,
		struct snd_soc_dai *dai)
		{
		struct snd_soc_codec *codec = dai->codec;

		switch (cmd) {
		case SNDRV_PCM_TRIGGER_START:
		case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		return snd_soc_update_bits(codec, STIH407_AUDIO_GLUE_CTRL,
		SPDIF_BIPHASE_ENABLE_MASK,
		SPDIF_BIPHASE_ENABLE_MASK);
		case SNDRV_PCM_TRIGGER_RESUME:
		case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		case SNDRV_PCM_TRIGGER_STOP:
		case SNDRV_PCM_TRIGGER_SUSPEND:
		return snd_soc_update_bits(codec, STIH407_AUDIO_GLUE_CTRL,
		SPDIF_BIPHASE_ENABLE_MASK,
		0);
		default:
		return -EINVAL;
		}
		}

		static bool sti_sas_volatile_register(struct device *dev, unsigned int reg)
		{
		if (reg == STIH407_AUDIO_GLUE_CTRL)
		return true;

		return false;
		}

		/*
		* CODEC DAIS
		*/

		/*
		* sti_sas_set_sysclk:
		* get MCLK input frequency to check that MCLK-FS ratio is coherent
		*/
		static int sti_sas_set_sysclk(struct snd_soc_dai *dai, int clk_id,
		unsigned int freq, int dir)
		{
		struct snd_soc_codec *codec = dai->codec;
		struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev);

		if (dir == SND_SOC_CLOCK_OUT)
		return 0;

		if (clk_id != 0)
		return -EINVAL;

		switch (dai->id) {
		case STI_SAS_DAI_SPDIF_OUT:
		drvdata->spdif.mclk = freq;
		break;

		case STI_SAS_DAI_ANALOG_OUT:
		drvdata->dac.mclk = freq;
		break;
		}

		return 0;
		}

		static int sti_sas_prepare(struct snd_pcm_substream *substream,
		struct snd_soc_dai *dai)
		{
		struct snd_soc_codec *codec = dai->codec;
		struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev);
		struct snd_pcm_runtime *runtime = substream->runtime;

		switch (dai->id) {
		case STI_SAS_DAI_SPDIF_OUT:
		if ((drvdata->spdif.mclk / runtime->rate) != 128) {
		dev_err(codec->dev, "unexpected mclk-fs ratio");
		return -EINVAL;
		}
		break;
		case STI_SAS_DAI_ANALOG_OUT:
		if ((drvdata->dac.mclk / runtime->rate) != 256) {
		dev_err(codec->dev, "unexpected mclk-fs ratio");
		return -EINVAL;
		}
		break;
		}

		return 0;
		}

		const struct snd_soc_dai_ops stih416_dac_ops = {
		.set_fmt = sti_sas_dac_set_fmt,
		.mute_stream = stih416_sas_dac_mute,
		.prepare = sti_sas_prepare,
		.set_sysclk = sti_sas_set_sysclk,
		};

		const struct snd_soc_dai_ops stih407_dac_ops = {
		.set_fmt = sti_sas_dac_set_fmt,
		.mute_stream = stih407_sas_dac_mute,
		.prepare = sti_sas_prepare,
		.set_sysclk = sti_sas_set_sysclk,
		};

		const struct regmap_config stih407_sas_regmap = {
		.reg_bits = 32,
		.val_bits = 32,

		.max_register = STIH407_AUDIO_DAC_CTRL,
		.reg_defaults = stih407_sas_reg_defaults,
		.num_reg_defaults = ARRAY_SIZE(stih407_sas_reg_defaults),
		.volatile_reg = sti_sas_volatile_register,
		.cache_type = REGCACHE_RBTREE,
		.reg_read = sti_sas_read_reg,
		.reg_write = sti_sas_write_reg,
		};

		const struct regmap_config stih416_sas_regmap = {
		.reg_bits = 32,
		.val_bits = 32,

		.max_register = STIH416_AUDIO_DAC_CTRL,
		.reg_defaults = stih416_sas_reg_defaults,
		.num_reg_defaults = ARRAY_SIZE(stih416_sas_reg_defaults),
		.volatile_reg = sti_sas_volatile_register,
		.cache_type = REGCACHE_RBTREE,
		.reg_read = sti_sas_read_reg,
		.reg_write = sti_sas_write_reg,
		};

		const struct sti_sas_dev_data stih416_data = {
		.chipid = CHIPID_STIH416,
		.regmap = &stih416_sas_regmap,
		.dac_ops = &stih416_dac_ops,
		.dapm_widgets = stih416_sas_dapm_widgets,
		.num_dapm_widgets = ARRAY_SIZE(stih416_sas_dapm_widgets),
		.dapm_routes = stih416_sas_route,
		.num_dapm_routes = ARRAY_SIZE(stih416_sas_route),
		};

		const struct sti_sas_dev_data stih407_data = {
		.chipid = CHIPID_STIH407,
		.regmap = &stih407_sas_regmap,
		.dac_ops = &stih407_dac_ops,
		.dapm_widgets = stih407_sas_dapm_widgets,
		.num_dapm_widgets = ARRAY_SIZE(stih407_sas_dapm_widgets),
		.dapm_routes = stih407_sas_route,
		.num_dapm_routes = ARRAY_SIZE(stih407_sas_route),
		};

		static struct snd_soc_dai_driver sti_sas_dai[] = {
		{
		.name = "sas-dai-spdif-out",
		.id = STI_SAS_DAI_SPDIF_OUT,
		.playback = {
		.stream_name = "spdif_p",
		.channels_min = 2,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \|
		SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_64000 \|
		SNDRV_PCM_RATE_88200 \| SNDRV_PCM_RATE_96000 \|
		SNDRV_PCM_RATE_192000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE \|
		SNDRV_PCM_FMTBIT_S32_LE,
		},
		.ops = (struct snd_soc_dai_ops[]) {
		{
		.set_fmt = sti_sas_spdif_set_fmt,
		.trigger = sti_sas_spdif_trigger,
		.set_sysclk = sti_sas_set_sysclk,
		.prepare = sti_sas_prepare,
		}
		},
		},
		{
		.name = "sas-dai-dac",
		.id = STI_SAS_DAI_ANALOG_OUT,
		.playback = {
		.stream_name = "dac_p",
		.channels_min = 2,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_8000_48000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE \|
		SNDRV_PCM_FMTBIT_S32_LE,
		},
		},
		};

		#ifdef CONFIG_PM_SLEEP
		static int sti_sas_resume(struct snd_soc_codec *codec)
		{
		struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev);

		return sti_sas_init_sas_registers(codec, drvdata);
		}
		#else
		#define sti_sas_resume NULL
		#endif

		static int sti_sas_codec_probe(struct snd_soc_codec *codec)
		{
		struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev);
		int ret;

		ret = sti_sas_init_sas_registers(codec, drvdata);

		return ret;
		}

		static struct snd_soc_codec_driver sti_sas_driver = {
		.probe = sti_sas_codec_probe,
		.resume = sti_sas_resume,
		};

		static const struct of_device_id sti_sas_dev_match[] = {
		{
		.compatible = "st,stih416-sas-codec",
		.data = &stih416_data,
		},
		{
		.compatible = "st,stih407-sas-codec",
		.data = &stih407_data,
		},
		{},
		};

		static int sti_sas_driver_probe(struct platform_device *pdev)
		{
		struct device_node *pnode = pdev->dev.of_node;
		struct sti_sas_data *drvdata;

		/* Allocate device structure */
		drvdata = devm_kzalloc(&pdev->dev, sizeof(struct sti_sas_data),
		GFP_KERNEL);
		if (!drvdata)
		return -ENOMEM;

		/* Populate data structure depending on compatibility */
		if (!of_match_node(sti_sas_dev_match, pnode)->data) {
		dev_err(&pdev->dev, "data associated to device is missing");
		return -EINVAL;
		}

		drvdata->dev_data = of_match_node(sti_sas_dev_match, pnode)->data;

		/* Initialise device structure */
		drvdata->dev = &pdev->dev;

		/* Request the DAC & SPDIF registers memory region */
		drvdata->dac.virt_regmap = devm_regmap_init(&pdev->dev, NULL, drvdata,
		drvdata->dev_data->regmap);
		if (!drvdata->dac.virt_regmap) {
		dev_err(&pdev->dev, "audio registers not enabled\n");
		return -EFAULT;
		}

		/* Request the syscon region */
		drvdata->dac.regmap =
		syscon_regmap_lookup_by_phandle(pnode, "st,syscfg");
		if (!drvdata->dac.regmap) {
		dev_err(&pdev->dev, "syscon registers not available\n");
		return -EFAULT;
		}
		drvdata->spdif.regmap = drvdata->dac.regmap;

		/* Set DAC dai probe */
		if (drvdata->dev_data->chipid == CHIPID_STIH416)
		sti_sas_dai[STI_SAS_DAI_ANALOG_OUT].probe = stih416_dac_probe;

		sti_sas_dai[STI_SAS_DAI_ANALOG_OUT].ops = drvdata->dev_data->dac_ops;

		/* Set dapms*/
		sti_sas_driver.dapm_widgets = drvdata->dev_data->dapm_widgets;
		sti_sas_driver.num_dapm_widgets = drvdata->dev_data->num_dapm_widgets;

		sti_sas_driver.dapm_routes = drvdata->dev_data->dapm_routes;
		sti_sas_driver.num_dapm_routes = drvdata->dev_data->num_dapm_routes;

		/* Store context */
		dev_set_drvdata(&pdev->dev, drvdata);

		return snd_soc_register_codec(&pdev->dev, &sti_sas_driver,
		sti_sas_dai,
		ARRAY_SIZE(sti_sas_dai));
		}

		static int sti_sas_driver_remove(struct platform_device *pdev)
		{
		snd_soc_unregister_codec(&pdev->dev);

		return 0;
		}

		static struct platform_driver sti_sas_platform_driver = {
		.driver = {
		.name = "sti-sas-codec",
		.owner = THIS_MODULE,
		.of_match_table = sti_sas_dev_match,
		},
		.probe = sti_sas_driver_probe,
		.remove = sti_sas_driver_remove,
		};

		module_platform_driver(sti_sas_platform_driver);

		MODULE_DESCRIPTION("audio codec for STMicroelectronics sti platforms");
		MODULE_AUTHOR("Arnaud.pouliquen@st.com");
		MODULE_LICENSE("GPL v2");