[deliverable/linux.git] / sound / soc / codecs / wm8741.c

/*
 * wm8741.c  --  WM8741 ALSA SoC Audio driver
 *
 * Copyright 2010-1 Wolfson Microelectronics plc
 *
 * Author: Ian Lartey <ian@opensource.wolfsonmicro.com>
 *
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/spi/spi.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/of_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/tlv.h>

#include "wm8741.h"

#define WM8741_NUM_SUPPLIES 2
static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = {
	"AVDD",
	"DVDD",
};

#define WM8741_NUM_RATES 6

/* codec private data */
struct wm8741_priv {
	struct regmap *regmap;
	struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
	unsigned int sysclk;
	const struct snd_pcm_hw_constraint_list *sysclk_constraints;
};

static const struct reg_default wm8741_reg_defaults[] = {
	{  0, 0x0000 },     /* R0  - DACLLSB Attenuation */
	{  1, 0x0000 },     /* R1  - DACLMSB Attenuation */
	{  2, 0x0000 },     /* R2  - DACRLSB Attenuation */
	{  3, 0x0000 },     /* R3  - DACRMSB Attenuation */
	{  4, 0x0000 },     /* R4  - Volume Control */
	{  5, 0x000A },     /* R5  - Format Control */
	{  6, 0x0000 },     /* R6  - Filter Control */
	{  7, 0x0000 },     /* R7  - Mode Control 1 */
	{  8, 0x0002 },     /* R8  - Mode Control 2 */
	{ 32, 0x0002 },     /* R32 - ADDITONAL_CONTROL_1 */
};

static bool wm8741_readable(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case WM8741_DACLLSB_ATTENUATION:
	case WM8741_DACLMSB_ATTENUATION:
	case WM8741_DACRLSB_ATTENUATION:
	case WM8741_DACRMSB_ATTENUATION:
	case WM8741_VOLUME_CONTROL:
	case WM8741_FORMAT_CONTROL:
	case WM8741_FILTER_CONTROL:
	case WM8741_MODE_CONTROL_1:
	case WM8741_MODE_CONTROL_2:
	case WM8741_ADDITIONAL_CONTROL_1:
		return true;
	default:
		return false;
	}
}

static int wm8741_reset(struct snd_soc_codec *codec)
{
	return snd_soc_write(codec, WM8741_RESET, 0);
}

static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);

static const struct snd_kcontrol_new wm8741_snd_controls[] = {
SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
		 WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
		 WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
};

static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_OUTPUT("VOUTLP"),
SND_SOC_DAPM_OUTPUT("VOUTLN"),
SND_SOC_DAPM_OUTPUT("VOUTRP"),
SND_SOC_DAPM_OUTPUT("VOUTRN"),
};

static const struct snd_soc_dapm_route wm8741_dapm_routes[] = {
	{ "VOUTLP", NULL, "DACL" },
	{ "VOUTLN", NULL, "DACL" },
	{ "VOUTRP", NULL, "DACR" },
	{ "VOUTRN", NULL, "DACR" },
};

static struct {
	int value;
	int ratio;
} lrclk_ratios[WM8741_NUM_RATES] = {
	{ 1, 128 },
	{ 2, 192 },
	{ 3, 256 },
	{ 4, 384 },
	{ 5, 512 },
	{ 6, 768 },
};

static const unsigned int rates_11289[] = {
	44100, 88235,
};

static const struct snd_pcm_hw_constraint_list constraints_11289 = {
	.count	= ARRAY_SIZE(rates_11289),
	.list	= rates_11289,
};

static const unsigned int rates_12288[] = {
	32000, 48000, 96000,
};

static const struct snd_pcm_hw_constraint_list constraints_12288 = {
	.count	= ARRAY_SIZE(rates_12288),
	.list	= rates_12288,
};

static const unsigned int rates_16384[] = {
	32000,
};

static const struct snd_pcm_hw_constraint_list constraints_16384 = {
	.count	= ARRAY_SIZE(rates_16384),
	.list	= rates_16384,
};

static const unsigned int rates_16934[] = {
	44100, 88235,
};

static const struct snd_pcm_hw_constraint_list constraints_16934 = {
	.count	= ARRAY_SIZE(rates_16934),
	.list	= rates_16934,
};

static const unsigned int rates_18432[] = {
	48000, 96000,
};

static const struct snd_pcm_hw_constraint_list constraints_18432 = {
	.count	= ARRAY_SIZE(rates_18432),
	.list	= rates_18432,
};

static const unsigned int rates_22579[] = {
	44100, 88235, 1764000
};

static const struct snd_pcm_hw_constraint_list constraints_22579 = {
	.count	= ARRAY_SIZE(rates_22579),
	.list	= rates_22579,
};

static const unsigned int rates_24576[] = {
	32000, 48000, 96000, 192000
};

static const struct snd_pcm_hw_constraint_list constraints_24576 = {
	.count	= ARRAY_SIZE(rates_24576),
	.list	= rates_24576,
};

static const unsigned int rates_36864[] = {
	48000, 96000, 19200
};

static const struct snd_pcm_hw_constraint_list constraints_36864 = {
	.count	= ARRAY_SIZE(rates_36864),
	.list	= rates_36864,
};


static int wm8741_startup(struct snd_pcm_substream *substream,
			  struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);

	/* The set of sample rates that can be supported depends on the
	 * MCLK supplied to the CODEC - enforce this.
	 */
	if (!wm8741->sysclk) {
		dev_err(codec->dev,
			"No MCLK configured, call set_sysclk() on init\n");
		return -EINVAL;
	}

	snd_pcm_hw_constraint_list(substream->runtime, 0,
				   SNDRV_PCM_HW_PARAM_RATE,
				   wm8741->sysclk_constraints);

	return 0;
}

static int wm8741_hw_params(struct snd_pcm_substream *substream,
			    struct snd_pcm_hw_params *params,
			    struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1FC;
	int i;

	/* Find a supported LRCLK ratio */
	for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
		if (wm8741->sysclk / params_rate(params) ==
		    lrclk_ratios[i].ratio)
			break;
	}

	/* Should never happen, should be handled by constraints */
	if (i == ARRAY_SIZE(lrclk_ratios)) {
		dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n",
			wm8741->sysclk / params_rate(params));
		return -EINVAL;
	}

	/* bit size */
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		break;
	case SNDRV_PCM_FORMAT_S20_3LE:
		iface |= 0x0001;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		iface |= 0x0002;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		iface |= 0x0003;
		break;
	default:
		dev_dbg(codec->dev, "wm8741_hw_params:    Unsupported bit size param = %d",
			params_format(params));
		return -EINVAL;
	}

	dev_dbg(codec->dev, "wm8741_hw_params:    bit size param = %d",
		params_format(params));

	snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
	return 0;
}

static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
		int clk_id, unsigned int freq, int dir)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);

	dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);

	switch (freq) {
	case 11289600:
		wm8741->sysclk_constraints = &constraints_11289;
		wm8741->sysclk = freq;
		return 0;

	case 12288000:
		wm8741->sysclk_constraints = &constraints_12288;
		wm8741->sysclk = freq;
		return 0;

	case 16384000:
		wm8741->sysclk_constraints = &constraints_16384;
		wm8741->sysclk = freq;
		return 0;

	case 16934400:
		wm8741->sysclk_constraints = &constraints_16934;
		wm8741->sysclk = freq;
		return 0;

	case 18432000:
		wm8741->sysclk_constraints = &constraints_18432;
		wm8741->sysclk = freq;
		return 0;

	case 22579200:
	case 33868800:
		wm8741->sysclk_constraints = &constraints_22579;
		wm8741->sysclk = freq;
		return 0;

	case 24576000:
		wm8741->sysclk_constraints = &constraints_24576;
		wm8741->sysclk = freq;
		return 0;

	case 36864000:
		wm8741->sysclk_constraints = &constraints_36864;
		wm8741->sysclk = freq;
		return 0;
	}
	return -EINVAL;
}

static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
		unsigned int fmt)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1C3;

	/* check master/slave audio interface */
	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBS_CFS:
		break;
	default:
		return -EINVAL;
	}

	/* interface format */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		iface |= 0x0008;
		break;
	case SND_SOC_DAIFMT_RIGHT_J:
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		iface |= 0x0004;
		break;
	case SND_SOC_DAIFMT_DSP_A:
		iface |= 0x000C;
		break;
	case SND_SOC_DAIFMT_DSP_B:
		iface |= 0x001C;
		break;
	default:
		return -EINVAL;
	}

	/* clock inversion */
	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
		break;
	case SND_SOC_DAIFMT_IB_IF:
		iface |= 0x0010;
		break;
	case SND_SOC_DAIFMT_IB_NF:
		iface |= 0x0020;
		break;
	case SND_SOC_DAIFMT_NB_IF:
		iface |= 0x0030;
		break;
	default:
		return -EINVAL;
	}


	dev_dbg(codec->dev, "wm8741_set_dai_fmt:    Format=%x, Clock Inv=%x\n",
				fmt & SND_SOC_DAIFMT_FORMAT_MASK,
				((fmt & SND_SOC_DAIFMT_INV_MASK)));

	snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
	return 0;
}

#define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
			SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
			SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
			SNDRV_PCM_RATE_192000)

#define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)

static const struct snd_soc_dai_ops wm8741_dai_ops = {
	.startup	= wm8741_startup,
	.hw_params	= wm8741_hw_params,
	.set_sysclk	= wm8741_set_dai_sysclk,
	.set_fmt	= wm8741_set_dai_fmt,
};

static struct snd_soc_dai_driver wm8741_dai = {
	.name = "wm8741",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,  /* Mono modes not yet supported */
		.channels_max = 2,
		.rates = WM8741_RATES,
		.formats = WM8741_FORMATS,
	},
	.ops = &wm8741_dai_ops,
};

#ifdef CONFIG_PM
static int wm8741_resume(struct snd_soc_codec *codec)
{
	snd_soc_cache_sync(codec);
	return 0;
}
#else
#define wm8741_suspend NULL
#define wm8741_resume NULL
#endif

static int wm8741_probe(struct snd_soc_codec *codec)
{
	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	int ret = 0;

	ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
				    wm8741->supplies);
	if (ret != 0) {
		dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
		goto err_get;
	}

	ret = wm8741_reset(codec);
	if (ret < 0) {
		dev_err(codec->dev, "Failed to issue reset\n");
		goto err_enable;
	}

	/* Change some default settings - latch VU */
	snd_soc_update_bits(codec, WM8741_DACLLSB_ATTENUATION,
			    WM8741_UPDATELL, WM8741_UPDATELL);
	snd_soc_update_bits(codec, WM8741_DACLMSB_ATTENUATION,
			    WM8741_UPDATELM, WM8741_UPDATELM);
	snd_soc_update_bits(codec, WM8741_DACRLSB_ATTENUATION,
			    WM8741_UPDATERL, WM8741_UPDATERL);
	snd_soc_update_bits(codec, WM8741_DACRMSB_ATTENUATION,
			    WM8741_UPDATERM, WM8741_UPDATERM);

	dev_dbg(codec->dev, "Successful registration\n");
	return ret;

err_enable:
	regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
err_get:
	return ret;
}

static int wm8741_remove(struct snd_soc_codec *codec)
{
	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);

	regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);

	return 0;
}

static struct snd_soc_codec_driver soc_codec_dev_wm8741 = {
	.probe =	wm8741_probe,
	.remove =	wm8741_remove,
	.resume =	wm8741_resume,

	.controls = wm8741_snd_controls,
	.num_controls = ARRAY_SIZE(wm8741_snd_controls),
	.dapm_widgets = wm8741_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(wm8741_dapm_widgets),
	.dapm_routes = wm8741_dapm_routes,
	.num_dapm_routes = ARRAY_SIZE(wm8741_dapm_routes),
};

static const struct of_device_id wm8741_of_match[] = {
	{ .compatible = "wlf,wm8741", },
	{ }
};
MODULE_DEVICE_TABLE(of, wm8741_of_match);

static const struct regmap_config wm8741_regmap = {
	.reg_bits = 7,
	.val_bits = 9,
	.max_register = WM8741_MAX_REGISTER,

	.reg_defaults = wm8741_reg_defaults,
	.num_reg_defaults = ARRAY_SIZE(wm8741_reg_defaults),
	.cache_type = REGCACHE_RBTREE,

	.readable_reg = wm8741_readable,
};

#if IS_ENABLED(CONFIG_I2C)
static int wm8741_i2c_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct wm8741_priv *wm8741;
	int ret, i;

	wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv),
			      GFP_KERNEL);
	if (wm8741 == NULL)
		return -ENOMEM;

	for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
		wm8741->supplies[i].supply = wm8741_supply_names[i];

	ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies),
				      wm8741->supplies);
	if (ret != 0) {
		dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
		return ret;
	}

	wm8741->regmap = devm_regmap_init_i2c(i2c, &wm8741_regmap);
	if (IS_ERR(wm8741->regmap)) {
		ret = PTR_ERR(wm8741->regmap);
		dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
		return ret;
	}

	i2c_set_clientdata(i2c, wm8741);

	ret = snd_soc_register_codec(&i2c->dev,
				     &soc_codec_dev_wm8741, &wm8741_dai, 1);

	return ret;
}

static int wm8741_i2c_remove(struct i2c_client *client)
{
	snd_soc_unregister_codec(&client->dev);
	return 0;
}

static const struct i2c_device_id wm8741_i2c_id[] = {
	{ "wm8741", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);

static struct i2c_driver wm8741_i2c_driver = {
	.driver = {
		.name = "wm8741",
		.owner = THIS_MODULE,
		.of_match_table = wm8741_of_match,
	},
	.probe =    wm8741_i2c_probe,
	.remove =   wm8741_i2c_remove,
	.id_table = wm8741_i2c_id,
};
#endif

#if defined(CONFIG_SPI_MASTER)
static int wm8741_spi_probe(struct spi_device *spi)
{
	struct wm8741_priv *wm8741;
	int ret, i;

	wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv),
			     GFP_KERNEL);
	if (wm8741 == NULL)
		return -ENOMEM;

	for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
		wm8741->supplies[i].supply = wm8741_supply_names[i];

	ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8741->supplies),
				      wm8741->supplies);
	if (ret != 0) {
		dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
		return ret;
	}

	wm8741->regmap = devm_regmap_init_spi(spi, &wm8741_regmap);
	if (IS_ERR(wm8741->regmap)) {
		ret = PTR_ERR(wm8741->regmap);
		dev_err(&spi->dev, "Failed to init regmap: %d\n", ret);
		return ret;
	}

	spi_set_drvdata(spi, wm8741);

	ret = snd_soc_register_codec(&spi->dev,
			&soc_codec_dev_wm8741, &wm8741_dai, 1);
	return ret;
}

static int wm8741_spi_remove(struct spi_device *spi)
{
	snd_soc_unregister_codec(&spi->dev);
	return 0;
}

static struct spi_driver wm8741_spi_driver = {
	.driver = {
		.name	= "wm8741",
		.owner	= THIS_MODULE,
		.of_match_table = wm8741_of_match,
	},
	.probe		= wm8741_spi_probe,
	.remove		= wm8741_spi_remove,
};
#endif /* CONFIG_SPI_MASTER */

static int __init wm8741_modinit(void)
{
	int ret = 0;

#if IS_ENABLED(CONFIG_I2C)
	ret = i2c_add_driver(&wm8741_i2c_driver);
	if (ret != 0)
		pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
#endif
#if defined(CONFIG_SPI_MASTER)
	ret = spi_register_driver(&wm8741_spi_driver);
	if (ret != 0) {
		printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n",
		       ret);
	}
#endif

	return ret;
}
module_init(wm8741_modinit);

static void __exit wm8741_exit(void)
{
#if defined(CONFIG_SPI_MASTER)
	spi_unregister_driver(&wm8741_spi_driver);
#endif
#if IS_ENABLED(CONFIG_I2C)
	i2c_del_driver(&wm8741_i2c_driver);
#endif
}
module_exit(wm8741_exit);

MODULE_DESCRIPTION("ASoC WM8741 driver");
MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
992bee40 IL	1	/*
	2	* wm8741.c -- WM8741 ALSA SoC Audio driver
	3	*
656baaeb	4	* Copyright 2010-1 Wolfson Microelectronics plc
992bee40 IL	5	*
	6	* Author: Ian Lartey <ian@opensource.wolfsonmicro.com>
	7	*
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License version 2 as
	11	* published by the Free Software Foundation.
	12	*/
	13
	14	#include <linux/module.h>
	15	#include <linux/moduleparam.h>
	16	#include <linux/init.h>
	17	#include <linux/delay.h>
	18	#include <linux/pm.h>
	19	#include <linux/i2c.h>
39e9b8d2	20	#include <linux/spi/spi.h>
fe98c0cf	21	#include <linux/regmap.h>
992bee40 IL	22	#include <linux/regulator/consumer.h>
992bee40 IL	23	#include <linux/slab.h>
80080ec5	24	#include <linux/of_device.h>
992bee40 IL	25	#include <sound/core.h>
	26	#include <sound/pcm.h>
	27	#include <sound/pcm_params.h>
	28	#include <sound/soc.h>
992bee40 IL	29	#include <sound/initval.h>
	30	#include <sound/tlv.h>
	31
	32	#include "wm8741.h"
	33
992bee40 IL	34	#define WM8741_NUM_SUPPLIES 2
	35	static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = {
	36	"AVDD",
	37	"DVDD",
	38	};
	39
3fe4a5ee	40	#define WM8741_NUM_RATES 6
992bee40 IL	41
	42	/* codec private data */
	43	struct wm8741_priv {
fe98c0cf	44	struct regmap *regmap;
992bee40 IL	45	struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
992bee40 IL	46	unsigned int sysclk;
70bad2c7	47	const struct snd_pcm_hw_constraint_list *sysclk_constraints;
992bee40 IL	48	};
992bee40 IL	49
fe98c0cf MB	50	static const struct reg_default wm8741_reg_defaults[] = {
	51	{ 0, 0x0000 }, /* R0 - DACLLSB Attenuation */
	52	{ 1, 0x0000 }, /* R1 - DACLMSB Attenuation */
	53	{ 2, 0x0000 }, /* R2 - DACRLSB Attenuation */
	54	{ 3, 0x0000 }, /* R3 - DACRMSB Attenuation */
	55	{ 4, 0x0000 }, /* R4 - Volume Control */
	56	{ 5, 0x000A }, /* R5 - Format Control */
	57	{ 6, 0x0000 }, /* R6 - Filter Control */
	58	{ 7, 0x0000 }, /* R7 - Mode Control 1 */
	59	{ 8, 0x0002 }, /* R8 - Mode Control 2 */
	60	{ 32, 0x0002 }, /* R32 - ADDITONAL_CONTROL_1 */
992bee40 IL	61	};
992bee40 IL	62
fe98c0cf MB	63	static bool wm8741_readable(struct device *dev, unsigned int reg)
	64	{
	65	switch (reg) {
	66	case WM8741_DACLLSB_ATTENUATION:
	67	case WM8741_DACLMSB_ATTENUATION:
	68	case WM8741_DACRLSB_ATTENUATION:
	69	case WM8741_DACRMSB_ATTENUATION:
	70	case WM8741_VOLUME_CONTROL:
	71	case WM8741_FORMAT_CONTROL:
	72	case WM8741_FILTER_CONTROL:
	73	case WM8741_MODE_CONTROL_1:
	74	case WM8741_MODE_CONTROL_2:
	75	case WM8741_ADDITIONAL_CONTROL_1:
	76	return true;
	77	default:
	78	return false;
	79	}
	80	}
992bee40 IL	81
	82	static int wm8741_reset(struct snd_soc_codec *codec)
	83	{
	84	return snd_soc_write(codec, WM8741_RESET, 0);
	85	}
	86
	87	static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
	88	static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);
	89
	90	static const struct snd_kcontrol_new wm8741_snd_controls[] = {
	91	SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
	92	WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
	93	SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
	94	WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
	95	};
	96
	97	static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
	98	SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
	99	SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
	100	SND_SOC_DAPM_OUTPUT("VOUTLP"),
	101	SND_SOC_DAPM_OUTPUT("VOUTLN"),
	102	SND_SOC_DAPM_OUTPUT("VOUTRP"),
	103	SND_SOC_DAPM_OUTPUT("VOUTRN"),
	104	};
	105
0e62780f	106	static const struct snd_soc_dapm_route wm8741_dapm_routes[] = {
992bee40 IL	107	{ "VOUTLP", NULL, "DACL" },
	108	{ "VOUTLN", NULL, "DACL" },
	109	{ "VOUTRP", NULL, "DACR" },
	110	{ "VOUTRN", NULL, "DACR" },
	111	};
	112
992bee40 IL	113	static struct {
	114	int value;
	115	int ratio;
	116	} lrclk_ratios[WM8741_NUM_RATES] = {
3fe4a5ee IL	117	{ 1, 128 },
	118	{ 2, 192 },
	119	{ 3, 256 },
	120	{ 4, 384 },
	121	{ 5, 512 },
	122	{ 6, 768 },
	123	};
	124
70bad2c7	125	static const unsigned int rates_11289[] = {
3fe4a5ee IL	126	44100, 88235,
	127	};
	128
70bad2c7	129	static const struct snd_pcm_hw_constraint_list constraints_11289 = {
3fe4a5ee IL	130	.count = ARRAY_SIZE(rates_11289),
	131	.list = rates_11289,
	132	};
	133
70bad2c7	134	static const unsigned int rates_12288[] = {
3fe4a5ee IL	135	32000, 48000, 96000,
	136	};
	137
70bad2c7	138	static const struct snd_pcm_hw_constraint_list constraints_12288 = {
3fe4a5ee IL	139	.count = ARRAY_SIZE(rates_12288),
	140	.list = rates_12288,
	141	};
	142
70bad2c7	143	static const unsigned int rates_16384[] = {
3fe4a5ee IL	144	32000,
	145	};
	146
70bad2c7	147	static const struct snd_pcm_hw_constraint_list constraints_16384 = {
3fe4a5ee IL	148	.count = ARRAY_SIZE(rates_16384),
	149	.list = rates_16384,
	150	};
	151
70bad2c7	152	static const unsigned int rates_16934[] = {
3fe4a5ee IL	153	44100, 88235,
	154	};
	155
70bad2c7	156	static const struct snd_pcm_hw_constraint_list constraints_16934 = {
3fe4a5ee IL	157	.count = ARRAY_SIZE(rates_16934),
	158	.list = rates_16934,
	159	};
	160
70bad2c7	161	static const unsigned int rates_18432[] = {
3fe4a5ee IL	162	48000, 96000,
	163	};
	164
70bad2c7	165	static const struct snd_pcm_hw_constraint_list constraints_18432 = {
3fe4a5ee IL	166	.count = ARRAY_SIZE(rates_18432),
	167	.list = rates_18432,
	168	};
	169
70bad2c7	170	static const unsigned int rates_22579[] = {
3fe4a5ee IL	171	44100, 88235, 1764000
	172	};
	173
70bad2c7	174	static const struct snd_pcm_hw_constraint_list constraints_22579 = {
3fe4a5ee IL	175	.count = ARRAY_SIZE(rates_22579),
	176	.list = rates_22579,
	177	};
	178
70bad2c7	179	static const unsigned int rates_24576[] = {
3fe4a5ee IL	180	32000, 48000, 96000, 192000
	181	};
	182
70bad2c7	183	static const struct snd_pcm_hw_constraint_list constraints_24576 = {
3fe4a5ee IL	184	.count = ARRAY_SIZE(rates_24576),
	185	.list = rates_24576,
	186	};
	187
70bad2c7	188	static const unsigned int rates_36864[] = {
3fe4a5ee IL	189	48000, 96000, 19200
	190	};
	191
70bad2c7	192	static const struct snd_pcm_hw_constraint_list constraints_36864 = {
3fe4a5ee IL	193	.count = ARRAY_SIZE(rates_36864),
3fe4a5ee IL	194	.list = rates_36864,
992bee40 IL	195	};
	196
	197
	198	static int wm8741_startup(struct snd_pcm_substream *substream,
	199	struct snd_soc_dai *dai)
	200	{
	201	struct snd_soc_codec *codec = dai->codec;
	202	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	203
	204	/* The set of sample rates that can be supported depends on the
	205	* MCLK supplied to the CODEC - enforce this.
	206	*/
	207	if (!wm8741->sysclk) {
	208	dev_err(codec->dev,
	209	"No MCLK configured, call set_sysclk() on init\n");
	210	return -EINVAL;
	211	}
	212
	213	snd_pcm_hw_constraint_list(substream->runtime, 0,
	214	SNDRV_PCM_HW_PARAM_RATE,
3fe4a5ee	215	wm8741->sysclk_constraints);
992bee40 IL	216
	217	return 0;
	218	}
	219
	220	static int wm8741_hw_params(struct snd_pcm_substream *substream,
	221	struct snd_pcm_hw_params *params,
	222	struct snd_soc_dai *dai)
	223	{
e6968a17	224	struct snd_soc_codec *codec = dai->codec;
992bee40 IL	225	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	226	u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1FC;
	227	int i;
	228
	229	/* Find a supported LRCLK ratio */
	230	for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
	231	if (wm8741->sysclk / params_rate(params) ==
	232	lrclk_ratios[i].ratio)
	233	break;
	234	}
	235
	236	/* Should never happen, should be handled by constraints */
	237	if (i == ARRAY_SIZE(lrclk_ratios)) {
	238	dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n",
	239	wm8741->sysclk / params_rate(params));
	240	return -EINVAL;
	241	}
	242
	243	/* bit size */
	244	switch (params_format(params)) {
	245	case SNDRV_PCM_FORMAT_S16_LE:
	246	break;
	247	case SNDRV_PCM_FORMAT_S20_3LE:
	248	iface \|= 0x0001;
	249	break;
	250	case SNDRV_PCM_FORMAT_S24_LE:
	251	iface \|= 0x0002;
	252	break;
	253	case SNDRV_PCM_FORMAT_S32_LE:
	254	iface \|= 0x0003;
	255	break;
	256	default:
	257	dev_dbg(codec->dev, "wm8741_hw_params: Unsupported bit size param = %d",
	258	params_format(params));
	259	return -EINVAL;
	260	}
	261
	262	dev_dbg(codec->dev, "wm8741_hw_params: bit size param = %d",
	263	params_format(params));
	264
	265	snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
	266	return 0;
	267	}
	268
	269	static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
	270	int clk_id, unsigned int freq, int dir)
	271	{
	272	struct snd_soc_codec *codec = codec_dai->codec;
	273	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
992bee40 IL	274
	275	dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
	276
3fe4a5ee IL	277	switch (freq) {
	278	case 11289600:
	279	wm8741->sysclk_constraints = &constraints_11289;
	280	wm8741->sysclk = freq;
	281	return 0;
	282
	283	case 12288000:
	284	wm8741->sysclk_constraints = &constraints_12288;
	285	wm8741->sysclk = freq;
	286	return 0;
	287
	288	case 16384000:
	289	wm8741->sysclk_constraints = &constraints_16384;
	290	wm8741->sysclk = freq;
	291	return 0;
	292
	293	case 16934400:
	294	wm8741->sysclk_constraints = &constraints_16934;
	295	wm8741->sysclk = freq;
	296	return 0;
	297
	298	case 18432000:
	299	wm8741->sysclk_constraints = &constraints_18432;
	300	wm8741->sysclk = freq;
	301	return 0;
	302
	303	case 22579200:
	304	case 33868800:
	305	wm8741->sysclk_constraints = &constraints_22579;
	306	wm8741->sysclk = freq;
	307	return 0;
	308
	309	case 24576000:
	310	wm8741->sysclk_constraints = &constraints_24576;
	311	wm8741->sysclk = freq;
	312	return 0;
	313
	314	case 36864000:
	315	wm8741->sysclk_constraints = &constraints_36864;
	316	wm8741->sysclk = freq;
	317	return 0;
992bee40	318	}
3fe4a5ee	319	return -EINVAL;
992bee40 IL	320	}
	321
	322	static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
	323	unsigned int fmt)
	324	{
	325	struct snd_soc_codec *codec = codec_dai->codec;
	326	u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1C3;
	327
	328	/* check master/slave audio interface */
	329	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	330	case SND_SOC_DAIFMT_CBS_CFS:
	331	break;
	332	default:
	333	return -EINVAL;
	334	}
	335
	336	/* interface format */
	337	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	338	case SND_SOC_DAIFMT_I2S:
	339	iface \|= 0x0008;
	340	break;
	341	case SND_SOC_DAIFMT_RIGHT_J:
	342	break;
	343	case SND_SOC_DAIFMT_LEFT_J:
	344	iface \|= 0x0004;
	345	break;
	346	case SND_SOC_DAIFMT_DSP_A:
3a340104	347	iface \|= 0x000C;
992bee40 IL	348	break;
992bee40 IL	349	case SND_SOC_DAIFMT_DSP_B:
3a340104	350	iface \|= 0x001C;
992bee40 IL	351	break;
	352	default:
	353	return -EINVAL;
	354	}
	355
	356	/* clock inversion */
	357	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	358	case SND_SOC_DAIFMT_NB_NF:
	359	break;
	360	case SND_SOC_DAIFMT_IB_IF:
	361	iface \|= 0x0010;
	362	break;
	363	case SND_SOC_DAIFMT_IB_NF:
	364	iface \|= 0x0020;
	365	break;
	366	case SND_SOC_DAIFMT_NB_IF:
	367	iface \|= 0x0030;
	368	break;
	369	default:
	370	return -EINVAL;
	371	}
	372
	373
	374	dev_dbg(codec->dev, "wm8741_set_dai_fmt: Format=%x, Clock Inv=%x\n",
	375	fmt & SND_SOC_DAIFMT_FORMAT_MASK,
	376	((fmt & SND_SOC_DAIFMT_INV_MASK)));
	377
	378	snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
	379	return 0;
	380	}
	381
	382	#define WM8741_RATES (SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \| \
	383	SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_88200 \| \
	384	SNDRV_PCM_RATE_96000 \| SNDRV_PCM_RATE_176400 \| \
	385	SNDRV_PCM_RATE_192000)
	386
	387	#define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S20_3LE \|\
	388	SNDRV_PCM_FMTBIT_S24_LE \| SNDRV_PCM_FMTBIT_S32_LE)
	389
85e7652d	390	static const struct snd_soc_dai_ops wm8741_dai_ops = {
992bee40 IL	391	.startup = wm8741_startup,
	392	.hw_params = wm8741_hw_params,
	393	.set_sysclk = wm8741_set_dai_sysclk,
	394	.set_fmt = wm8741_set_dai_fmt,
	395	};
	396
f0fba2ad	397	static struct snd_soc_dai_driver wm8741_dai = {
30e2d368	398	.name = "wm8741",
992bee40 IL	399	.playback = {
	400	.stream_name = "Playback",
	401	.channels_min = 2, /* Mono modes not yet supported */
	402	.channels_max = 2,
	403	.rates = WM8741_RATES,
	404	.formats = WM8741_FORMATS,
	405	},
	406	.ops = &wm8741_dai_ops,
	407	};
992bee40 IL	408
992bee40 IL	409	#ifdef CONFIG_PM
f0fba2ad	410	static int wm8741_resume(struct snd_soc_codec *codec)
992bee40	411	{
df3431b7	412	snd_soc_cache_sync(codec);
992bee40 IL	413	return 0;
	414	}
	415	#else
	416	#define wm8741_suspend NULL
	417	#define wm8741_resume NULL
	418	#endif
	419
f0fba2ad	420	static int wm8741_probe(struct snd_soc_codec *codec)
992bee40	421	{
f0fba2ad	422	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
992bee40	423	int ret = 0;
398575db MB	424
	425	ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
	426	wm8741->supplies);
	427	if (ret != 0) {
	428	dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
	429	goto err_get;
	430	}
992bee40	431
f0fba2ad	432	ret = wm8741_reset(codec);
992bee40	433	if (ret < 0) {
f0fba2ad	434	dev_err(codec->dev, "Failed to issue reset\n");
398575db	435	goto err_enable;
992bee40 IL	436	}
992bee40 IL	437
f0fba2ad	438	/* Change some default settings - latch VU */
a1b3b5ee MB	439	snd_soc_update_bits(codec, WM8741_DACLLSB_ATTENUATION,
	440	WM8741_UPDATELL, WM8741_UPDATELL);
	441	snd_soc_update_bits(codec, WM8741_DACLMSB_ATTENUATION,
	442	WM8741_UPDATELM, WM8741_UPDATELM);
	443	snd_soc_update_bits(codec, WM8741_DACRLSB_ATTENUATION,
	444	WM8741_UPDATERL, WM8741_UPDATERL);
9b5999b1	445	snd_soc_update_bits(codec, WM8741_DACRMSB_ATTENUATION,
a1b3b5ee	446	WM8741_UPDATERM, WM8741_UPDATERM);
f0fba2ad	447
f0fba2ad	448	dev_dbg(codec->dev, "Successful registration\n");
992bee40	449	return ret;
398575db MB	450
	451	err_enable:
	452	regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
	453	err_get:
398575db MB	454	return ret;
	455	}
	456
	457	static int wm8741_remove(struct snd_soc_codec *codec)
	458	{
	459	struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
	460
	461	regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
398575db MB	462
398575db MB	463	return 0;
992bee40 IL	464	}
992bee40 IL	465
f0fba2ad	466	static struct snd_soc_codec_driver soc_codec_dev_wm8741 = {
992bee40	467	.probe = wm8741_probe,
398575db	468	.remove = wm8741_remove,
992bee40	469	.resume = wm8741_resume,
0e62780f MB	470
	471	.controls = wm8741_snd_controls,
	472	.num_controls = ARRAY_SIZE(wm8741_snd_controls),
	473	.dapm_widgets = wm8741_dapm_widgets,
	474	.num_dapm_widgets = ARRAY_SIZE(wm8741_dapm_widgets),
	475	.dapm_routes = wm8741_dapm_routes,
	476	.num_dapm_routes = ARRAY_SIZE(wm8741_dapm_routes),
992bee40	477	};
992bee40	478
80080ec5 MB	479	static const struct of_device_id wm8741_of_match[] = {
	480	{ .compatible = "wlf,wm8741", },
	481	{ }
	482	};
	483	MODULE_DEVICE_TABLE(of, wm8741_of_match);
	484
fe98c0cf MB	485	static const struct regmap_config wm8741_regmap = {
	486	.reg_bits = 7,
	487	.val_bits = 9,
	488	.max_register = WM8741_MAX_REGISTER,
	489
	490	.reg_defaults = wm8741_reg_defaults,
	491	.num_reg_defaults = ARRAY_SIZE(wm8741_reg_defaults),
	492	.cache_type = REGCACHE_RBTREE,
	493
	494	.readable_reg = wm8741_readable,
	495	};
	496
26090a83	497	#if IS_ENABLED(CONFIG_I2C)
f0fba2ad LG	498	static int wm8741_i2c_probe(struct i2c_client *i2c,
f0fba2ad LG	499	const struct i2c_device_id *id)
992bee40	500	{
f0fba2ad	501	struct wm8741_priv *wm8741;
d9780550	502	int ret, i;
992bee40	503
5aefb306 MB	504	wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv),
5aefb306 MB	505	GFP_KERNEL);
f0fba2ad LG	506	if (wm8741 == NULL)
f0fba2ad LG	507	return -ENOMEM;
992bee40	508
d9780550 MB	509	for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
	510	wm8741->supplies[i].supply = wm8741_supply_names[i];
	511
	512	ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies),
	513	wm8741->supplies);
	514	if (ret != 0) {
fe98c0cf MB	515	dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
	516	return ret;
	517	}
	518
fd64c455	519	wm8741->regmap = devm_regmap_init_i2c(i2c, &wm8741_regmap);
fe98c0cf MB	520	if (IS_ERR(wm8741->regmap)) {
	521	ret = PTR_ERR(wm8741->regmap);
	522	dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
	523	return ret;
d9780550 MB	524	}
d9780550 MB	525
f0fba2ad	526	i2c_set_clientdata(i2c, wm8741);
992bee40	527
398575db MB	528	ret = snd_soc_register_codec(&i2c->dev,
398575db MB	529	&soc_codec_dev_wm8741, &wm8741_dai, 1);
992bee40	530
992bee40 IL	531	return ret;
	532	}
	533
f0fba2ad	534	static int wm8741_i2c_remove(struct i2c_client *client)
992bee40	535	{
f0fba2ad	536	snd_soc_unregister_codec(&client->dev);
992bee40 IL	537	return 0;
	538	}
	539
	540	static const struct i2c_device_id wm8741_i2c_id[] = {
	541	{ "wm8741", 0 },
	542	{ }
	543	};
	544	MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
	545
992bee40 IL	546	static struct i2c_driver wm8741_i2c_driver = {
992bee40 IL	547	.driver = {
0473e61b	548	.name = "wm8741",
992bee40	549	.owner = THIS_MODULE,
80080ec5	550	.of_match_table = wm8741_of_match,
992bee40 IL	551	},
992bee40 IL	552	.probe = wm8741_i2c_probe,
f0fba2ad	553	.remove = wm8741_i2c_remove,
992bee40 IL	554	.id_table = wm8741_i2c_id,
	555	};
	556	#endif
	557
39e9b8d2	558	#if defined(CONFIG_SPI_MASTER)
7a79e94e	559	static int wm8741_spi_probe(struct spi_device *spi)
39e9b8d2 MB	560	{
39e9b8d2 MB	561	struct wm8741_priv *wm8741;
d9780550	562	int ret, i;
39e9b8d2	563
5aefb306 MB	564	wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv),
5aefb306 MB	565	GFP_KERNEL);
39e9b8d2 MB	566	if (wm8741 == NULL)
	567	return -ENOMEM;
	568
d9780550 MB	569	for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
	570	wm8741->supplies[i].supply = wm8741_supply_names[i];
	571
fe98c0cf	572	ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8741->supplies),
d9780550 MB	573	wm8741->supplies);
	574	if (ret != 0) {
	575	dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
fe98c0cf MB	576	return ret;
	577	}
	578
fd64c455	579	wm8741->regmap = devm_regmap_init_spi(spi, &wm8741_regmap);
fe98c0cf MB	580	if (IS_ERR(wm8741->regmap)) {
	581	ret = PTR_ERR(wm8741->regmap);
	582	dev_err(&spi->dev, "Failed to init regmap: %d\n", ret);
	583	return ret;
d9780550 MB	584	}
d9780550 MB	585
39e9b8d2 MB	586	spi_set_drvdata(spi, wm8741);
	587
	588	ret = snd_soc_register_codec(&spi->dev,
	589	&soc_codec_dev_wm8741, &wm8741_dai, 1);
39e9b8d2 MB	590	return ret;
	591	}
	592
7a79e94e	593	static int wm8741_spi_remove(struct spi_device *spi)
39e9b8d2 MB	594	{
39e9b8d2 MB	595	snd_soc_unregister_codec(&spi->dev);
39e9b8d2 MB	596	return 0;
	597	}
	598
	599	static struct spi_driver wm8741_spi_driver = {
	600	.driver = {
	601	.name = "wm8741",
	602	.owner = THIS_MODULE,
80080ec5	603	.of_match_table = wm8741_of_match,
39e9b8d2 MB	604	},
39e9b8d2 MB	605	.probe = wm8741_spi_probe,
7a79e94e	606	.remove = wm8741_spi_remove,
39e9b8d2 MB	607	};
	608	#endif /* CONFIG_SPI_MASTER */
	609
992bee40 IL	610	static int __init wm8741_modinit(void)
992bee40 IL	611	{
f0fba2ad LG	612	int ret = 0;
f0fba2ad LG	613
26090a83	614	#if IS_ENABLED(CONFIG_I2C)
992bee40	615	ret = i2c_add_driver(&wm8741_i2c_driver);
3fe4a5ee	616	if (ret != 0)
f0fba2ad	617	pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
992bee40	618	#endif
39e9b8d2 MB	619	#if defined(CONFIG_SPI_MASTER)
	620	ret = spi_register_driver(&wm8741_spi_driver);
	621	if (ret != 0) {
	622	printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n",
	623	ret);
	624	}
	625	#endif
f0fba2ad LG	626
f0fba2ad LG	627	return ret;
992bee40 IL	628	}
	629	module_init(wm8741_modinit);
	630
	631	static void __exit wm8741_exit(void)
	632	{
39e9b8d2 MB	633	#if defined(CONFIG_SPI_MASTER)
	634	spi_unregister_driver(&wm8741_spi_driver);
	635	#endif
26090a83	636	#if IS_ENABLED(CONFIG_I2C)
992bee40 IL	637	i2c_del_driver(&wm8741_i2c_driver);
	638	#endif
	639	}
	640	module_exit(wm8741_exit);
	641
	642	MODULE_DESCRIPTION("ASoC WM8741 driver");
	643	MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
	644	MODULE_LICENSE("GPL");