C++ snd_soc_register_codec函数代码示例

static int gbcodec_i2c_probe(struct i2c_client *i2c,
		    const struct i2c_device_id *id)
{
	return snd_soc_register_codec(&i2c->dev, &soc_codec_dev_gbcodec,
				      gbcodec_dai, ARRAY_SIZE(gbcodec_dai));
}

//.........这里部分代码省略.........
		return -ENOMEM;

	for (i = 0; i < ARRAY_SIZE(supply_names); i++)
		adau1701->supplies[i].supply = supply_names[i];

	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(adau1701->supplies),
			adau1701->supplies);
	if (ret < 0) {
		dev_err(dev, "Failed to get regulators: %d\n", ret);
		return ret;
	}

	ret = regulator_bulk_enable(ARRAY_SIZE(adau1701->supplies),
			adau1701->supplies);
	if (ret < 0) {
		dev_err(dev, "Failed to enable regulators: %d\n", ret);
		return ret;
	}

	adau1701->client = client;
	adau1701->regmap = devm_regmap_init(dev, NULL, client,
					    &adau1701_regmap);
	if (IS_ERR(adau1701->regmap)) {
		ret = PTR_ERR(adau1701->regmap);
		goto exit_regulators_disable;
	}


	if (dev->of_node) {
		gpio_nreset = of_get_named_gpio(dev->of_node, "reset-gpio", 0);
		if (gpio_nreset < 0 && gpio_nreset != -ENOENT) {
			ret = gpio_nreset;
			goto exit_regulators_disable;
		}

		gpio_pll_mode[0] = of_get_named_gpio(dev->of_node,
						   "adi,pll-mode-gpios", 0);
		if (gpio_pll_mode[0] < 0 && gpio_pll_mode[0] != -ENOENT) {
			ret = gpio_pll_mode[0];
			goto exit_regulators_disable;
		}

		gpio_pll_mode[1] = of_get_named_gpio(dev->of_node,
						   "adi,pll-mode-gpios", 1);
		if (gpio_pll_mode[1] < 0 && gpio_pll_mode[1] != -ENOENT) {
			ret = gpio_pll_mode[1];
			goto exit_regulators_disable;
		}

		of_property_read_u32(dev->of_node, "adi,pll-clkdiv",
				     &adau1701->pll_clkdiv);

		of_property_read_u8_array(dev->of_node, "adi,pin-config",
					  adau1701->pin_config,
					  ARRAY_SIZE(adau1701->pin_config));
	}

	if (gpio_is_valid(gpio_nreset)) {
		ret = devm_gpio_request_one(dev, gpio_nreset, GPIOF_OUT_INIT_LOW,
					    "ADAU1701 Reset");
		if (ret < 0)
			goto exit_regulators_disable;
	}

	if (gpio_is_valid(gpio_pll_mode[0]) &&
	    gpio_is_valid(gpio_pll_mode[1])) {
		ret = devm_gpio_request_one(dev, gpio_pll_mode[0],
					    GPIOF_OUT_INIT_LOW,
					    "ADAU1701 PLL mode 0");
		if (ret < 0)
			goto exit_regulators_disable;

		ret = devm_gpio_request_one(dev, gpio_pll_mode[1],
					    GPIOF_OUT_INIT_LOW,
					    "ADAU1701 PLL mode 1");
		if (ret < 0)
			goto exit_regulators_disable;
	}

	adau1701->gpio_nreset = gpio_nreset;
	adau1701->gpio_pll_mode[0] = gpio_pll_mode[0];
	adau1701->gpio_pll_mode[1] = gpio_pll_mode[1];

	i2c_set_clientdata(client, adau1701);

	adau1701->sigmadsp = devm_sigmadsp_init_i2c(client,
		&adau1701_sigmadsp_ops, ADAU1701_FIRMWARE);
	if (IS_ERR(adau1701->sigmadsp)) {
		ret = PTR_ERR(adau1701->sigmadsp);
		goto exit_regulators_disable;
	}

	ret = snd_soc_register_codec(&client->dev, &adau1701_codec_drv,
			&adau1701_dai, 1);

exit_regulators_disable:

	regulator_bulk_disable(ARRAY_SIZE(adau1701->supplies), adau1701->supplies);
	return ret;
}

//.........这里部分代码省略.........
			      GFP_KERNEL);
	if (!wm2000)
		return -ENOMEM;

	mutex_init(&wm2000->lock);

	dev_set_drvdata(&i2c->dev, wm2000);

	wm2000->regmap = devm_regmap_init_i2c(i2c, &wm2000_regmap);
	if (IS_ERR(wm2000->regmap)) {
		ret = PTR_ERR(wm2000->regmap);
		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
			ret);
		goto out;
	}

	for (i = 0; i < WM2000_NUM_SUPPLIES; i++)
		wm2000->supplies[i].supply = wm2000_supplies[i];

	ret = devm_regulator_bulk_get(&i2c->dev, WM2000_NUM_SUPPLIES,
				      wm2000->supplies);
	if (ret != 0) {
		dev_err(&i2c->dev, "Failed to get supplies: %d\n", ret);
		return ret;
	}

	ret = regulator_bulk_enable(WM2000_NUM_SUPPLIES, wm2000->supplies);
	if (ret != 0) {
		dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
		return ret;
	}

	/* Verify that this is a WM2000 */
	reg = wm2000_read(i2c, WM2000_REG_ID1);
	id = reg << 8;
	reg = wm2000_read(i2c, WM2000_REG_ID2);
	id |= reg & 0xff;

	if (id != 0x2000) {
		dev_err(&i2c->dev, "Device is not a WM2000 - ID %x\n", id);
		ret = -ENODEV;
		goto err_supplies;
	}

	reg = wm2000_read(i2c, WM2000_REG_REVISON);
	dev_info(&i2c->dev, "revision %c\n", reg + 'A');

	wm2000->mclk = devm_clk_get(&i2c->dev, "MCLK");
	if (IS_ERR(wm2000->mclk)) {
		ret = PTR_ERR(wm2000->mclk);
		dev_err(&i2c->dev, "Failed to get MCLK: %d\n", ret);
		goto err_supplies;
	}

	filename = "wm2000_anc.bin";
	pdata = dev_get_platdata(&i2c->dev);
	if (pdata) {
		wm2000->speech_clarity = !pdata->speech_enh_disable;

		if (pdata->download_file)
			filename = pdata->download_file;
	}

	ret = request_firmware(&fw, filename, &i2c->dev);
	if (ret != 0) {
		dev_err(&i2c->dev, "Failed to acquire ANC data: %d\n", ret);
		goto err_supplies;
	}

	/* Pre-cook the concatenation of the register address onto the image */
	wm2000->anc_download_size = fw->size + 2;
	wm2000->anc_download = devm_kzalloc(&i2c->dev,
					    wm2000->anc_download_size,
					    GFP_KERNEL);
	if (wm2000->anc_download == NULL) {
		dev_err(&i2c->dev, "Out of memory\n");
		ret = -ENOMEM;
		goto err_supplies;
	}

	wm2000->anc_download[0] = 0x80;
	wm2000->anc_download[1] = 0x00;
	memcpy(wm2000->anc_download + 2, fw->data, fw->size);

	wm2000->anc_eng_ena = 1;
	wm2000->anc_active = 1;
	wm2000->spk_ena = 1;
	wm2000->i2c = i2c;

	wm2000_reset(wm2000);

	ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm2000, NULL, 0);

err_supplies:
	regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);

out:
	release_firmware(fw);
	return ret;
}

static int ac97_probe(struct platform_device *pdev)
{
	return snd_soc_register_codec(&pdev->dev,
			&soc_codec_dev_ac97, &ac97_dai, 1);
}

static int wm8961_register(struct wm8961_priv *wm8961)
{
	struct snd_soc_codec *codec = &wm8961->codec;
	int ret;
	u16 reg;

	if (wm8961_codec) {
		dev_err(codec->dev, "Another WM8961 is registered\n");
		ret = -EINVAL;
		goto err;
	}

	mutex_init(&codec->mutex);
	INIT_LIST_HEAD(&codec->dapm_widgets);
	INIT_LIST_HEAD(&codec->dapm_paths);

	snd_soc_codec_set_drvdata(codec, wm8961);
	codec->name = "WM8961";
	codec->owner = THIS_MODULE;
	codec->dai = &wm8961_dai;
	codec->num_dai = 1;
	codec->reg_cache_size = ARRAY_SIZE(wm8961->reg_cache);
	codec->reg_cache = &wm8961->reg_cache;
	codec->bias_level = SND_SOC_BIAS_OFF;
	codec->set_bias_level = wm8961_set_bias_level;
	codec->volatile_register = wm8961_volatile_register;

	memcpy(codec->reg_cache, wm8961_reg_defaults,
	       sizeof(wm8961_reg_defaults));

	ret = snd_soc_codec_set_cache_io(codec, 8, 16, SND_SOC_I2C);
	if (ret != 0) {
		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
		goto err;
	}

	reg = snd_soc_read(codec, WM8961_SOFTWARE_RESET);
	if (reg != 0x1801) {
		dev_err(codec->dev, "Device is not a WM8961: ID=0x%x\n", reg);
		ret = -EINVAL;
		goto err;
	}

	/* This isn't volatile - readback doesn't correspond to write */
	reg = codec->hw_read(codec, WM8961_RIGHT_INPUT_VOLUME);
	dev_info(codec->dev, "WM8961 family %d revision %c\n",
		 (reg & WM8961_DEVICE_ID_MASK) >> WM8961_DEVICE_ID_SHIFT,
		 ((reg & WM8961_CHIP_REV_MASK) >> WM8961_CHIP_REV_SHIFT)
		 + 'A');

	ret = wm8961_reset(codec);
	if (ret < 0) {
		dev_err(codec->dev, "Failed to issue reset\n");
		return ret;
	}

	/* Enable class W */
	reg = snd_soc_read(codec, WM8961_CHARGE_PUMP_B);
	reg |= WM8961_CP_DYN_PWR_MASK;
	snd_soc_write(codec, WM8961_CHARGE_PUMP_B, reg);

	/* Latch volume update bits (right channel only, we always
	 * write both out) and default ZC on. */
	reg = snd_soc_read(codec, WM8961_ROUT1_VOLUME);
	snd_soc_write(codec, WM8961_ROUT1_VOLUME,
		     reg | WM8961_LO1ZC | WM8961_OUT1VU);
	snd_soc_write(codec, WM8961_LOUT1_VOLUME, reg | WM8961_LO1ZC);
	reg = snd_soc_read(codec, WM8961_ROUT2_VOLUME);
	snd_soc_write(codec, WM8961_ROUT2_VOLUME,
		     reg | WM8961_SPKRZC | WM8961_SPKVU);
	snd_soc_write(codec, WM8961_LOUT2_VOLUME, reg | WM8961_SPKLZC);

	reg = snd_soc_read(codec, WM8961_RIGHT_ADC_VOLUME);
	snd_soc_write(codec, WM8961_RIGHT_ADC_VOLUME, reg | WM8961_ADCVU);
	reg = snd_soc_read(codec, WM8961_RIGHT_INPUT_VOLUME);
	snd_soc_write(codec, WM8961_RIGHT_INPUT_VOLUME, reg | WM8961_IPVU);

	/* Use soft mute by default */
	reg = snd_soc_read(codec, WM8961_ADC_DAC_CONTROL_2);
	reg |= WM8961_DACSMM;
	snd_soc_write(codec, WM8961_ADC_DAC_CONTROL_2, reg);

	/* Use automatic clocking mode by default; for now this is all
	 * we support.
	 */
	reg = snd_soc_read(codec, WM8961_CLOCKING_3);
	reg &= ~WM8961_MANUAL_MODE;
	snd_soc_write(codec, WM8961_CLOCKING_3, reg);

	wm8961_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

	wm8961_dai.dev = codec->dev;

	wm8961_codec = codec;

	ret = snd_soc_register_codec(codec);
	if (ret != 0) {
		dev_err(codec->dev, "Failed to register codec: %d\n", ret);
		return ret;
	}
//.........这里部分代码省略.........

static int wm8523_register(struct wm8523_priv *wm8523,
			   enum snd_soc_control_type control)
{
	int ret;
	struct snd_soc_codec *codec = &wm8523->codec;
	int i;

	if (wm8523_codec) {
		dev_err(codec->dev, "Another WM8523 is registered\n");
		return -EINVAL;
	}

	mutex_init(&codec->mutex);
	INIT_LIST_HEAD(&codec->dapm_widgets);
	INIT_LIST_HEAD(&codec->dapm_paths);

	snd_soc_codec_set_drvdata(codec, wm8523);
	codec->name = "WM8523";
	codec->owner = THIS_MODULE;
	codec->bias_level = SND_SOC_BIAS_OFF;
	codec->set_bias_level = wm8523_set_bias_level;
	codec->dai = &wm8523_dai;
	codec->num_dai = 1;
	codec->reg_cache_size = WM8523_REGISTER_COUNT;
	codec->reg_cache = &wm8523->reg_cache;
	codec->volatile_register = wm8523_volatile_register;

	wm8523->rate_constraint.list = &wm8523->rate_constraint_list[0];
	wm8523->rate_constraint.count =
		ARRAY_SIZE(wm8523->rate_constraint_list);

	memcpy(codec->reg_cache, wm8523_reg, sizeof(wm8523_reg));

	ret = snd_soc_codec_set_cache_io(codec, 8, 16, control);
	if (ret != 0) {
		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
		goto err;
	}

	for (i = 0; i < ARRAY_SIZE(wm8523->supplies); i++)
		wm8523->supplies[i].supply = wm8523_supply_names[i];

	ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8523->supplies),
				 wm8523->supplies);
	if (ret != 0) {
		dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
		goto err;
	}

	ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies),
				    wm8523->supplies);
	if (ret != 0) {
		dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
		goto err_get;
	}

	ret = snd_soc_read(codec, WM8523_DEVICE_ID);
	if (ret < 0) {
		dev_err(codec->dev, "Failed to read ID register\n");
		goto err_enable;
	}
	if (ret != wm8523_reg[WM8523_DEVICE_ID]) {
		dev_err(codec->dev, "Device is not a WM8523, ID is %x\n", ret);
		ret = -EINVAL;
		goto err_enable;
	}

	ret = snd_soc_read(codec, WM8523_REVISION);
	if (ret < 0) {
		dev_err(codec->dev, "Failed to read revision register\n");
		goto err_enable;
	}
	dev_info(codec->dev, "revision %c\n",
		 (ret & WM8523_CHIP_REV_MASK) + 'A');

	ret = wm8523_reset(codec);
	if (ret < 0) {
		dev_err(codec->dev, "Failed to issue reset\n");
		goto err_enable;
	}

	wm8523_dai.dev = codec->dev;

	/* Change some default settings - latch VU and enable ZC */
	wm8523->reg_cache[WM8523_DAC_GAINR] |= WM8523_DACR_VU;
	wm8523->reg_cache[WM8523_DAC_CTRL3] |= WM8523_ZC;

	wm8523_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

	/* Bias level configuration will have done an extra enable */
	regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies);

	wm8523_codec = codec;

	ret = snd_soc_register_codec(codec);
	if (ret != 0) {
		dev_err(codec->dev, "Failed to register codec: %d\n", ret);
		return ret;
	}

//.........这里部分代码省略.........

static int __devinit cg29xx_codec_driver_probe(struct platform_device *pdev)
{
	int ret;
	struct cg29xx_codec_dai_data *dai_data;

	pr_debug("%s: Enter.\n", __func__);

	pr_info("%s: Init codec private data..\n", __func__);
	dai_data = kzalloc(CG29XX_NBR_OF_DAI * sizeof(struct cg29xx_codec_dai_data),
			GFP_KERNEL);
	if (dai_data == NULL)
		return -ENOMEM;

	dai_data[0].tx_active = 0;
	dai_data[0].rx_active = 0;
	dai_data[0].input_select = 0;
	dai_data[0].output_select = 0;
	dai_data[0].config.port = PORT_0_I2S;
	dai_data[0].config.conf.i2s.mode = DAI_MODE_SLAVE;
	dai_data[0].config.conf.i2s.half_period = HALF_PER_DUR_16;
	dai_data[0].config.conf.i2s.channel_sel = CHANNEL_SELECTION_BOTH;
	dai_data[0].config.conf.i2s.sample_rate = SAMPLE_RATE_48;
	dai_data[0].config.conf.i2s.word_width = WORD_WIDTH_32;
	dai_data[1].tx_active = 0;
	dai_data[1].rx_active = 0;
	dai_data[1].input_select = 0;
	dai_data[1].output_select = 0;
	dai_data[1].config.port = PORT_1_I2S_PCM;
	dai_data[1].config.conf.i2s_pcm.mode = DAI_MODE_SLAVE;
	dai_data[1].config.conf.i2s_pcm.slot_0_dir = DAI_DIR_B_RX_A_TX;
	dai_data[1].config.conf.i2s_pcm.slot_1_dir = DAI_DIR_B_TX_A_RX;
	dai_data[1].config.conf.i2s_pcm.slot_2_dir = DAI_DIR_B_RX_A_TX;
	dai_data[1].config.conf.i2s_pcm.slot_3_dir = DAI_DIR_B_RX_A_TX;
	dai_data[1].config.conf.i2s_pcm.slot_0_used = true;
	dai_data[1].config.conf.i2s_pcm.slot_1_used = false;
	dai_data[1].config.conf.i2s_pcm.slot_2_used = false;
	dai_data[1].config.conf.i2s_pcm.slot_3_used = false;
	dai_data[1].config.conf.i2s_pcm.slot_0_start = 0;
	dai_data[1].config.conf.i2s_pcm.slot_1_start = 16;
	dai_data[1].config.conf.i2s_pcm.slot_2_start = 32;
	dai_data[1].config.conf.i2s_pcm.slot_3_start = 48;
	dai_data[1].config.conf.i2s_pcm.protocol = PORT_PROTOCOL_PCM;
	dai_data[1].config.conf.i2s_pcm.ratio = STREAM_RATIO_FM48_VOICE16;
	dai_data[1].config.conf.i2s_pcm.duration = SYNC_DURATION_32;
	dai_data[1].config.conf.i2s_pcm.clk = BIT_CLK_512;
	dai_data[1].config.conf.i2s_pcm.sample_rate = SAMPLE_RATE_16;

	platform_set_drvdata(pdev, dai_data);

	pr_info("%s: Register codec.\n", __func__);
	ret = snd_soc_register_codec(&pdev->dev, &cg29xx_codec_driver, &cg29xx_dai_driver[0], 2);
	if (ret < 0) {
		pr_debug("%s: Error: Failed to register codec (ret = %d).\n",
			__func__,
			ret);
		snd_soc_unregister_codec(&pdev->dev);
		kfree(platform_get_drvdata(pdev));
		return ret;
	}

	return 0;
}

static int cq93vc_platform_probe(struct platform_device *pdev)
{
	return snd_soc_register_codec(&pdev->dev,
			&soc_codec_dev_cq93vc, &cq93vc_dai, 1);
}

static int __devinit uda134x_codec_probe(struct platform_device *pdev)
{
	return snd_soc_register_codec(&pdev->dev,
			&soc_codec_dev_uda134x, &uda134x_dai, 1);
}

static int s5m8751_codec_probe(struct platform_device *pdev)
{
	struct s5m8751_priv *priv;
	struct s5m8751 *s5m8751 = dev_get_drvdata(pdev->dev.parent);
	struct s5m8751_pdata *s5m8751_pdata = s5m8751->dev->platform_data;
	struct s5m8751_audio_pdata *pdata = s5m8751_pdata->audio;
	struct snd_soc_codec *codec;
	uint8_t reg_val;
	int ret = 0;

	priv = kzalloc(sizeof(struct s5m8751_priv), GFP_KERNEL);
	if (priv == NULL)
		goto err;

	priv->s5m8751 = s5m8751;
	codec = &priv->codec;

	mutex_init(&codec->mutex);
	INIT_LIST_HEAD(&codec->dapm_widgets);
	INIT_LIST_HEAD(&codec->dapm_paths);

	snd_soc_codec_set_drvdata(codec, priv);

	codec->name = "S5M8751";
	codec->owner = THIS_MODULE;
	codec->read = s5m8751_codec_read;
	codec->write = s5m8751_codec_write;
	codec->bias_level = SND_SOC_BIAS_OFF;
	codec->set_bias_level = s5m8751_set_bias_level;
	codec->dai = &s5m8751_dai;
	codec->num_dai = 1;

	mutex_init(&codec->mutex);
	INIT_LIST_HEAD(&codec->dapm_widgets);
	INIT_LIST_HEAD(&codec->dapm_paths);

	s5m8751_codec = codec;

	reg_val = s5m8751_codec_read(codec, S5M8751_AMP_CTRL);
	s5m8751_codec_write(codec, S5M8751_AMP_CTRL, reg_val |
						S5M8751_HP_AMP_MUTE_CONTROL_ON);

	s5m8751_codec_write(codec, S5M8751_DA_PDB1, S5M8751_DA_PDB1_SPK |
						S5M8751_VMID_50K);
	s5m8751_codec_write(codec, S5M8751_DA_AMIX1, S5M8751_DA_AMIX1_SPK);

	reg_val = s5m8751_codec_read(codec, S5M8751_IN1_CTRL1);
	reg_val &= ~S5M8751_LOGIC_PDN;
	s5m8751_codec_write(codec, S5M8751_IN1_CTRL1, reg_val);
	reg_val |= S5M8751_LOGIC_PDN;
	s5m8751_codec_write(codec, S5M8751_IN1_CTRL1, reg_val);

	s5m8751_codec_write(codec, S5M8751_DA_VOLL, pdata->dac_vol);
	s5m8751_codec_write(codec, S5M8751_DA_VOLR, pdata->dac_vol);
	s5m8751_codec_write(codec, S5M8751_HP_VOL1, pdata->hp_vol);
	s5m8751_codec_write(codec, S5M8751_HP_VOL2, pdata->hp_vol);
	s5m8751_codec_write(codec, S5M8751_AMP_EN, S5M8751_SPK_AMP_EN);

	codec->dev = &pdev->dev;
	s5m8751_dai.dev = codec->dev;

	s5m8751_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

	s5m8751_codec = codec;

	ret = snd_soc_register_codec(codec);
	if (ret != 0) {
		dev_err(codec->dev, "Failed to register codec: %d\n", ret);
		goto err_codec;
	}

	ret = snd_soc_register_dais(&s5m8751_dai, 1);
	if (ret != 0) {
		dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
		goto err_codec;
	}

	return 0;

err_codec:
	snd_soc_unregister_codec(codec);

err:
	kfree(priv);
	return ret;
}

static int __devinit dfbmcs320_probe(struct platform_device *pdev)
{
	return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_dfbmcs320,
			&dfbmcs320_dai, 1);
}

static __devinit int wm8903_i2c_probe(struct i2c_client *i2c,
				      const struct i2c_device_id *id)
{
	struct wm8903_priv *wm8903;
	struct snd_soc_codec *codec;
	int ret;
	u16 val;

	wm8903 = kzalloc(sizeof(struct wm8903_priv), GFP_KERNEL);
	if (wm8903 == NULL)
		return -ENOMEM;

	codec = &wm8903->codec;

	mutex_init(&codec->mutex);
	INIT_LIST_HEAD(&codec->dapm_widgets);
	INIT_LIST_HEAD(&codec->dapm_paths);

	codec->dev = &i2c->dev;
	codec->name = "WM8903";
	codec->owner = THIS_MODULE;
	codec->bias_level = SND_SOC_BIAS_OFF;
	codec->set_bias_level = wm8903_set_bias_level;
	codec->dai = &wm8903_dai;
	codec->num_dai = 1;
	codec->reg_cache_size = ARRAY_SIZE(wm8903->reg_cache);
	codec->reg_cache = &wm8903->reg_cache[0];
	codec->private_data = wm8903;
	codec->volatile_register = wm8903_volatile_register;

	i2c_set_clientdata(i2c, codec);
	codec->control_data = i2c;

	ret = snd_soc_codec_set_cache_io(codec, 8, 16, SND_SOC_I2C);
	if (ret != 0) {
		dev_err(&i2c->dev, "Failed to set cache I/O: %d\n", ret);
		goto err;
	}

	val = snd_soc_read(codec, WM8903_SW_RESET_AND_ID);
	if (val != wm8903_reg_defaults[WM8903_SW_RESET_AND_ID]) {
		dev_err(&i2c->dev,
			"Device with ID register %x is not a WM8903\n", val);
		return -ENODEV;
	}

	val = snd_soc_read(codec, WM8903_REVISION_NUMBER);
	dev_info(&i2c->dev, "WM8903 revision %d\n",
		 val & WM8903_CHIP_REV_MASK);

	wm8903_reset(codec);

	/* power on device */
	wm8903_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

	/* Latch volume update bits */
	val = snd_soc_read(codec, WM8903_ADC_DIGITAL_VOLUME_LEFT);
	val |= WM8903_ADCVU;
	snd_soc_write(codec, WM8903_ADC_DIGITAL_VOLUME_LEFT, val);
	snd_soc_write(codec, WM8903_ADC_DIGITAL_VOLUME_RIGHT, val);

	val = snd_soc_read(codec, WM8903_DAC_DIGITAL_VOLUME_LEFT);
	val |= WM8903_DACVU;
	snd_soc_write(codec, WM8903_DAC_DIGITAL_VOLUME_LEFT, val);
	snd_soc_write(codec, WM8903_DAC_DIGITAL_VOLUME_RIGHT, val);

	val = snd_soc_read(codec, WM8903_ANALOGUE_OUT1_LEFT);
	val |= WM8903_HPOUTVU;
	snd_soc_write(codec, WM8903_ANALOGUE_OUT1_LEFT, val);
	snd_soc_write(codec, WM8903_ANALOGUE_OUT1_RIGHT, val);

	val = snd_soc_read(codec, WM8903_ANALOGUE_OUT2_LEFT);
	val |= WM8903_LINEOUTVU;
	snd_soc_write(codec, WM8903_ANALOGUE_OUT2_LEFT, val);
	snd_soc_write(codec, WM8903_ANALOGUE_OUT2_RIGHT, val);

	val = snd_soc_read(codec, WM8903_ANALOGUE_OUT3_LEFT);
	val |= WM8903_SPKVU;
	snd_soc_write(codec, WM8903_ANALOGUE_OUT3_LEFT, val);
	snd_soc_write(codec, WM8903_ANALOGUE_OUT3_RIGHT, val);

	/* Enable DAC soft mute by default */
	val = snd_soc_read(codec, WM8903_DAC_DIGITAL_1);
	val |= WM8903_DAC_MUTEMODE;
	snd_soc_write(codec, WM8903_DAC_DIGITAL_1, val);

	wm8903_dai.dev = &i2c->dev;
	wm8903_codec = codec;

	ret = snd_soc_register_codec(codec);
	if (ret != 0) {
		dev_err(&i2c->dev, "Failed to register codec: %d\n", ret);
		goto err;
	}

	ret = snd_soc_register_dai(&wm8903_dai);
	if (ret != 0) {
		dev_err(&i2c->dev, "Failed to register DAI: %d\n", ret);
		goto err_codec;
	}
//.........这里部分代码省略.........

static int tfa_dummy_platform_probe(struct platform_device *pdev)
{
	return snd_soc_register_codec(&pdev->dev, &soc_codec_tfa_dummy,
					&tfa_dummy_dai, 1);
}

static int spdif_dit_probe(struct platform_device *pdev)
{
	return snd_soc_register_codec(&pdev->dev, &soc_codec_spdif_dit,
			&dit_stub_dai, 1);
}

static int cs42l73_i2c_probe(struct i2c_client *i2c_client,
			     const struct i2c_device_id *id)
{
	struct cs42l73_private *cs42l73;
	struct cs42l73_platform_data *pdata = dev_get_platdata(&i2c_client->dev);
	int ret;
	unsigned int devid = 0;
	unsigned int reg;
	u32 val32;

	cs42l73 = devm_kzalloc(&i2c_client->dev, sizeof(struct cs42l73_private),
			       GFP_KERNEL);
	if (!cs42l73)
		return -ENOMEM;

	cs42l73->regmap = devm_regmap_init_i2c(i2c_client, &cs42l73_regmap);
	if (IS_ERR(cs42l73->regmap)) {
		ret = PTR_ERR(cs42l73->regmap);
		dev_err(&i2c_client->dev, "regmap_init() failed: %d\n", ret);
		return ret;
	}

	if (pdata) {
		cs42l73->pdata = *pdata;
	} else {
		pdata = devm_kzalloc(&i2c_client->dev,
				     sizeof(struct cs42l73_platform_data),
				GFP_KERNEL);
		if (!pdata) {
			dev_err(&i2c_client->dev, "could not allocate pdata\n");
			return -ENOMEM;
		}
		if (i2c_client->dev.of_node) {
			if (of_property_read_u32(i2c_client->dev.of_node,
				"chgfreq", &val32) >= 0)
				pdata->chgfreq = val32;
		}
		pdata->reset_gpio = of_get_named_gpio(i2c_client->dev.of_node,
						"reset-gpio", 0);
		cs42l73->pdata = *pdata;
	}

	i2c_set_clientdata(i2c_client, cs42l73);

	if (cs42l73->pdata.reset_gpio) {
		ret = devm_gpio_request_one(&i2c_client->dev,
					    cs42l73->pdata.reset_gpio,
					    GPIOF_OUT_INIT_HIGH,
					    "CS42L73 /RST");
		if (ret < 0) {
			dev_err(&i2c_client->dev, "Failed to request /RST %d: %d\n",
				cs42l73->pdata.reset_gpio, ret);
			return ret;
		}
		gpio_set_value_cansleep(cs42l73->pdata.reset_gpio, 0);
		gpio_set_value_cansleep(cs42l73->pdata.reset_gpio, 1);
	}

	regcache_cache_bypass(cs42l73->regmap, true);

	/* initialize codec */
	ret = regmap_read(cs42l73->regmap, CS42L73_DEVID_AB, &reg);
	devid = (reg & 0xFF) << 12;

	ret = regmap_read(cs42l73->regmap, CS42L73_DEVID_CD, &reg);
	devid |= (reg & 0xFF) << 4;

	ret = regmap_read(cs42l73->regmap, CS42L73_DEVID_E, &reg);
	devid |= (reg & 0xF0) >> 4;

	if (devid != CS42L73_DEVID) {
		ret = -ENODEV;
		dev_err(&i2c_client->dev,
			"CS42L73 Device ID (%X). Expected %X\n",
			devid, CS42L73_DEVID);
		return ret;
	}

	ret = regmap_read(cs42l73->regmap, CS42L73_REVID, &reg);
	if (ret < 0) {
		dev_err(&i2c_client->dev, "Get Revision ID failed\n");
		return ret;;
	}

	dev_info(&i2c_client->dev,
		 "Cirrus Logic CS42L73, Revision: %02X\n", reg & 0xFF);

	regcache_cache_bypass(cs42l73->regmap, false);

	ret =  snd_soc_register_codec(&i2c_client->dev,
			&soc_codec_dev_cs42l73, cs42l73_dai,
			ARRAY_SIZE(cs42l73_dai));
	if (ret < 0)
		return ret;
	return 0;
}