Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 652 insertions, 0 deletions

diff --git a/sound/soc/codecs/max98925.c b/sound/soc/codecs/max98925.c
new file mode 100644
index 000000000..29877730a
--- /dev/null
+++ b/sound/soc/codecs/max98925.c
@@ -0,0 +1,652 @@
+/*
+ * max98925.c -- ALSA SoC Stereo MAX98925 driver
+ * Copyright 2013-15 Maxim Integrated Products
+ * 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/delay.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/cdev.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/tlv.h>
+#include "max98925.h"
+
+static const char *const dai_text[] = {
+	"Left", "Right", "LeftRight", "LeftRightDiv2",
+};
+
+static const char * const max98925_boost_voltage_text[] = {
+	"8.5V", "8.25V", "8.0V", "7.75V", "7.5V", "7.25V", "7.0V", "6.75V",
+	"6.5V", "6.5V", "6.5V", "6.5V", "6.5V", "6.5V",	"6.5V", "6.5V"
+};
+
+static SOC_ENUM_SINGLE_DECL(max98925_boost_voltage,
+	MAX98925_CONFIGURATION, M98925_BST_VOUT_SHIFT,
+	max98925_boost_voltage_text);
+
+static const char *const hpf_text[] = {
+	"Disable", "DC Block", "100Hz",	"200Hz", "400Hz", "800Hz",
+};
+
+static const struct reg_default max98925_reg[] = {
+	{ 0x0B, 0x00 }, /* IRQ Enable0 */
+	{ 0x0C, 0x00 }, /* IRQ Enable1 */
+	{ 0x0D, 0x00 }, /* IRQ Enable2 */
+	{ 0x0E, 0x00 }, /* IRQ Clear0 */
+	{ 0x0F, 0x00 }, /* IRQ Clear1 */
+	{ 0x10, 0x00 }, /* IRQ Clear2 */
+	{ 0x11, 0xC0 }, /* Map0 */
+	{ 0x12, 0x00 }, /* Map1 */
+	{ 0x13, 0x00 }, /* Map2 */
+	{ 0x14, 0xF0 }, /* Map3 */
+	{ 0x15, 0x00 }, /* Map4 */
+	{ 0x16, 0xAB }, /* Map5 */
+	{ 0x17, 0x89 }, /* Map6 */
+	{ 0x18, 0x00 }, /* Map7 */
+	{ 0x19, 0x00 }, /* Map8 */
+	{ 0x1A, 0x06 }, /* DAI Clock Mode 1 */
+	{ 0x1B, 0xC0 }, /* DAI Clock Mode 2 */
+	{ 0x1C, 0x00 }, /* DAI Clock Divider Denominator MSBs */
+	{ 0x1D, 0x00 }, /* DAI Clock Divider Denominator LSBs */
+	{ 0x1E, 0xF0 }, /* DAI Clock Divider Numerator MSBs */
+	{ 0x1F, 0x00 }, /* DAI Clock Divider Numerator LSBs */
+	{ 0x20, 0x50 }, /* Format */
+	{ 0x21, 0x00 }, /* TDM Slot Select */
+	{ 0x22, 0x00 }, /* DOUT Configuration VMON */
+	{ 0x23, 0x00 }, /* DOUT Configuration IMON */
+	{ 0x24, 0x00 }, /* DOUT Configuration VBAT */
+	{ 0x25, 0x00 }, /* DOUT Configuration VBST */
+	{ 0x26, 0x00 }, /* DOUT Configuration FLAG */
+	{ 0x27, 0xFF }, /* DOUT HiZ Configuration 1 */
+	{ 0x28, 0xFF }, /* DOUT HiZ Configuration 2 */
+	{ 0x29, 0xFF }, /* DOUT HiZ Configuration 3 */
+	{ 0x2A, 0xFF }, /* DOUT HiZ Configuration 4 */
+	{ 0x2B, 0x02 }, /* DOUT Drive Strength */
+	{ 0x2C, 0x90 }, /* Filters */
+	{ 0x2D, 0x00 }, /* Gain */
+	{ 0x2E, 0x02 }, /* Gain Ramping */
+	{ 0x2F, 0x00 }, /* Speaker Amplifier */
+	{ 0x30, 0x0A }, /* Threshold */
+	{ 0x31, 0x00 }, /* ALC Attack */
+	{ 0x32, 0x80 }, /* ALC Atten and Release */
+	{ 0x33, 0x00 }, /* ALC Infinite Hold Release */
+	{ 0x34, 0x92 }, /* ALC Configuration */
+	{ 0x35, 0x01 }, /* Boost Converter */
+	{ 0x36, 0x00 }, /* Block Enable */
+	{ 0x37, 0x00 }, /* Configuration */
+	{ 0x38, 0x00 }, /* Global Enable */
+	{ 0x3A, 0x00 }, /* Boost Limiter */
+};
+
+static const struct soc_enum max98925_dai_enum =
+	SOC_ENUM_SINGLE(MAX98925_GAIN, 5, ARRAY_SIZE(dai_text), dai_text);
+
+static const struct soc_enum max98925_hpf_enum =
+	SOC_ENUM_SINGLE(MAX98925_FILTERS, 0, ARRAY_SIZE(hpf_text), hpf_text);
+
+static const struct snd_kcontrol_new max98925_hpf_sel_mux =
+	SOC_DAPM_ENUM("Rc Filter MUX Mux", max98925_hpf_enum);
+
+static const struct snd_kcontrol_new max98925_dai_sel_mux =
+	SOC_DAPM_ENUM("DAI IN MUX Mux", max98925_dai_enum);
+
+static int max98925_dac_event(struct snd_soc_dapm_widget *w,
+		struct snd_kcontrol *kcontrol, int event)
+{
+	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+	struct max98925_priv *max98925 = snd_soc_component_get_drvdata(component);
+
+	switch (event) {
+	case SND_SOC_DAPM_PRE_PMU:
+		regmap_update_bits(max98925->regmap,
+			MAX98925_BLOCK_ENABLE,
+			M98925_BST_EN_MASK |
+			M98925_ADC_IMON_EN_MASK | M98925_ADC_VMON_EN_MASK,
+			M98925_BST_EN_MASK |
+			M98925_ADC_IMON_EN_MASK | M98925_ADC_VMON_EN_MASK);
+		break;
+	case SND_SOC_DAPM_POST_PMD:
+		regmap_update_bits(max98925->regmap,
+			MAX98925_BLOCK_ENABLE, M98925_BST_EN_MASK |
+			M98925_ADC_IMON_EN_MASK | M98925_ADC_VMON_EN_MASK, 0);
+		break;
+	default:
+		return 0;
+	}
+	return 0;
+}
+
+static const struct snd_soc_dapm_widget max98925_dapm_widgets[] = {
+	SND_SOC_DAPM_AIF_IN("DAI_OUT", "HiFi Playback", 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_MUX("DAI IN MUX", SND_SOC_NOPM, 0, 0,
+				&max98925_dai_sel_mux),
+	SND_SOC_DAPM_MUX("Rc Filter MUX", SND_SOC_NOPM, 0, 0,
+				&max98925_hpf_sel_mux),
+	SND_SOC_DAPM_DAC_E("Amp Enable", NULL, MAX98925_BLOCK_ENABLE,
+			M98925_SPK_EN_SHIFT, 0, max98925_dac_event,
+			SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
+	SND_SOC_DAPM_SUPPLY("Global Enable", MAX98925_GLOBAL_ENABLE,
+			M98925_EN_SHIFT, 0, NULL, 0),
+	SND_SOC_DAPM_OUTPUT("BE_OUT"),
+};
+
+static const struct snd_soc_dapm_route max98925_audio_map[] = {
+	{"DAI IN MUX", "Left", "DAI_OUT"},
+	{"DAI IN MUX", "Right", "DAI_OUT"},
+	{"DAI IN MUX", "LeftRight", "DAI_OUT"},
+	{"DAI IN MUX", "LeftRightDiv2", "DAI_OUT"},
+	{"Rc Filter MUX", "Disable", "DAI IN MUX"},
+	{"Rc Filter MUX", "DC Block", "DAI IN MUX"},
+	{"Rc Filter MUX", "100Hz", "DAI IN MUX"},
+	{"Rc Filter MUX", "200Hz", "DAI IN MUX"},
+	{"Rc Filter MUX", "400Hz", "DAI IN MUX"},
+	{"Rc Filter MUX", "800Hz", "DAI IN MUX"},
+	{"Amp Enable", NULL, "Rc Filter MUX"},
+	{"BE_OUT", NULL, "Amp Enable"},
+	{"BE_OUT", NULL, "Global Enable"},
+};
+
+static bool max98925_volatile_register(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case MAX98925_VBAT_DATA:
+	case MAX98925_VBST_DATA:
+	case MAX98925_LIVE_STATUS0:
+	case MAX98925_LIVE_STATUS1:
+	case MAX98925_LIVE_STATUS2:
+	case MAX98925_STATE0:
+	case MAX98925_STATE1:
+	case MAX98925_STATE2:
+	case MAX98925_FLAG0:
+	case MAX98925_FLAG1:
+	case MAX98925_FLAG2:
+	case MAX98925_REV_VERSION:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool max98925_readable_register(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case MAX98925_IRQ_CLEAR0:
+	case MAX98925_IRQ_CLEAR1:
+	case MAX98925_IRQ_CLEAR2:
+	case MAX98925_ALC_HOLD_RLS:
+		return false;
+	default:
+		return true;
+	}
+}
+
+static DECLARE_TLV_DB_SCALE(max98925_spk_tlv, -600, 100, 0);
+
+static const struct snd_kcontrol_new max98925_snd_controls[] = {
+	SOC_SINGLE_TLV("Speaker Volume", MAX98925_GAIN,
+		M98925_SPK_GAIN_SHIFT, (1<<M98925_SPK_GAIN_WIDTH)-1, 0,
+		max98925_spk_tlv),
+	SOC_SINGLE("Ramp Switch", MAX98925_GAIN_RAMPING,
+				M98925_SPK_RMP_EN_SHIFT, 1, 0),
+	SOC_SINGLE("ZCD Switch", MAX98925_GAIN_RAMPING,
+				M98925_SPK_ZCD_EN_SHIFT, 1, 0),
+	SOC_SINGLE("ALC Switch", MAX98925_THRESHOLD,
+				M98925_ALC_EN_SHIFT, 1, 0),
+	SOC_SINGLE("ALC Threshold", MAX98925_THRESHOLD, M98925_ALC_TH_SHIFT,
+				(1<<M98925_ALC_TH_WIDTH)-1, 0),
+	SOC_ENUM("Boost Output Voltage", max98925_boost_voltage),
+};
+
+/* codec sample rate and n/m dividers parameter table */
+static const struct {
+	int rate;
+	int  sr;
+	int divisors[3][2];
+} rate_table[] = {
+	{
+		.rate = 8000,
+		.sr = 0,
+		.divisors = { {1, 375}, {5, 1764}, {1, 384} }
+	},
+	{
+		.rate = 11025,
+		.sr = 1,
+		.divisors = { {147, 40000}, {1, 256}, {147, 40960} }
+	},
+	{
+		.rate = 12000,
+		.sr = 2,
+		.divisors = { {1, 250}, {5, 1176}, {1, 256} }
+	},
+	{
+		.rate = 16000,
+		.sr = 3,
+		.divisors = { {2, 375}, {5, 882}, {1, 192} }
+	},
+	{
+		.rate = 22050,
+		.sr = 4,
+		.divisors = { {147, 20000}, {1, 128}, {147, 20480} }
+	},
+	{
+		.rate = 24000,
+		.sr = 5,
+		.divisors = { {1, 125}, {5, 588}, {1, 128} }
+	},
+	{
+		.rate = 32000,
+		.sr = 6,
+		.divisors = { {4, 375}, {5, 441}, {1, 96} }
+	},
+	{
+		.rate = 44100,
+		.sr = 7,
+		.divisors = { {147, 10000}, {1, 64}, {147, 10240} }
+	},
+	{
+		.rate = 48000,
+		.sr = 8,
+		.divisors = { {2, 125}, {5, 294}, {1, 64} }
+	},
+};
+
+static inline int max98925_rate_value(struct snd_soc_component *component,
+		int rate, int clock, int *value, int *n, int *m)
+{
+	int ret = -EINVAL;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(rate_table); i++) {
+		if (rate_table[i].rate >= rate) {
+			*value = rate_table[i].sr;
+			*n = rate_table[i].divisors[clock][0];
+			*m = rate_table[i].divisors[clock][1];
+			ret = 0;
+			break;
+		}
+	}
+	return ret;
+}
+
+static void max98925_set_sense_data(struct max98925_priv *max98925)
+{
+	/* set VMON slots */
+	regmap_update_bits(max98925->regmap,
+		MAX98925_DOUT_CFG_VMON,
+		M98925_DAI_VMON_EN_MASK, M98925_DAI_VMON_EN_MASK);
+	regmap_update_bits(max98925->regmap,
+		MAX98925_DOUT_CFG_VMON,
+		M98925_DAI_VMON_SLOT_MASK,
+		max98925->v_slot << M98925_DAI_VMON_SLOT_SHIFT);
+	/* set IMON slots */
+	regmap_update_bits(max98925->regmap,
+		MAX98925_DOUT_CFG_IMON,
+		M98925_DAI_IMON_EN_MASK, M98925_DAI_IMON_EN_MASK);
+	regmap_update_bits(max98925->regmap,
+		MAX98925_DOUT_CFG_IMON,
+		M98925_DAI_IMON_SLOT_MASK,
+		max98925->i_slot << M98925_DAI_IMON_SLOT_SHIFT);
+}
+
+static int max98925_dai_set_fmt(struct snd_soc_dai *codec_dai,
+				 unsigned int fmt)
+{
+	struct snd_soc_component *component = codec_dai->component;
+	struct max98925_priv *max98925 = snd_soc_component_get_drvdata(component);
+	unsigned int invert = 0;
+
+	dev_dbg(component->dev, "%s: fmt 0x%08X\n", __func__, fmt);
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBS_CFS:
+		/* set DAI to slave mode */
+		regmap_update_bits(max98925->regmap,
+			MAX98925_DAI_CLK_MODE2,
+			M98925_DAI_MAS_MASK, 0);
+		max98925_set_sense_data(max98925);
+		break;
+	case SND_SOC_DAIFMT_CBM_CFM:
+		/*
+		 * set left channel DAI to master mode,
+		 * right channel always slave
+		 */
+		regmap_update_bits(max98925->regmap,
+			MAX98925_DAI_CLK_MODE2,
+			M98925_DAI_MAS_MASK, M98925_DAI_MAS_MASK);
+		break;
+	case SND_SOC_DAIFMT_CBS_CFM:
+	case SND_SOC_DAIFMT_CBM_CFS:
+	default:
+		dev_err(component->dev, "DAI clock mode unsupported");
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_NB_NF:
+		break;
+	case SND_SOC_DAIFMT_NB_IF:
+		invert = M98925_DAI_WCI_MASK;
+		break;
+	case SND_SOC_DAIFMT_IB_NF:
+		invert = M98925_DAI_BCI_MASK;
+		break;
+	case SND_SOC_DAIFMT_IB_IF:
+		invert = M98925_DAI_BCI_MASK | M98925_DAI_WCI_MASK;
+		break;
+	default:
+		dev_err(component->dev, "DAI invert mode unsupported");
+		return -EINVAL;
+	}
+
+	regmap_update_bits(max98925->regmap, MAX98925_FORMAT,
+			M98925_DAI_BCI_MASK | M98925_DAI_WCI_MASK, invert);
+	return 0;
+}
+
+static int max98925_set_clock(struct max98925_priv *max98925,
+		struct snd_pcm_hw_params *params)
+{
+	unsigned int dai_sr = 0, clock, mdll, n, m;
+	struct snd_soc_component *component = max98925->component;
+	int rate = params_rate(params);
+	/* BCLK/LRCLK ratio calculation */
+	int blr_clk_ratio = params_channels(params) * max98925->ch_size;
+
+	switch (blr_clk_ratio) {
+	case 32:
+		regmap_update_bits(max98925->regmap,
+			MAX98925_DAI_CLK_MODE2,
+			M98925_DAI_BSEL_MASK, M98925_DAI_BSEL_32);
+		break;
+	case 48:
+		regmap_update_bits(max98925->regmap,
+			MAX98925_DAI_CLK_MODE2,
+			M98925_DAI_BSEL_MASK, M98925_DAI_BSEL_48);
+		break;
+	case 64:
+		regmap_update_bits(max98925->regmap,
+			MAX98925_DAI_CLK_MODE2,
+			M98925_DAI_BSEL_MASK, M98925_DAI_BSEL_64);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (max98925->sysclk) {
+	case 6000000:
+		clock = 0;
+		mdll  = M98925_MDLL_MULT_MCLKx16;
+		break;
+	case 11289600:
+		clock = 1;
+		mdll  = M98925_MDLL_MULT_MCLKx8;
+		break;
+	case 12000000:
+		clock = 0;
+		mdll  = M98925_MDLL_MULT_MCLKx8;
+		break;
+	case 12288000:
+		clock = 2;
+		mdll  = M98925_MDLL_MULT_MCLKx8;
+		break;
+	default:
+		dev_info(max98925->component->dev, "unsupported sysclk %d\n",
+					max98925->sysclk);
+		return -EINVAL;
+	}
+
+	if (max98925_rate_value(component, rate, clock, &dai_sr, &n, &m))
+		return -EINVAL;
+
+	/* set DAI_SR to correct LRCLK frequency */
+	regmap_update_bits(max98925->regmap,
+			MAX98925_DAI_CLK_MODE2,
+			M98925_DAI_SR_MASK, dai_sr << M98925_DAI_SR_SHIFT);
+	/* set DAI m divider */
+	regmap_write(max98925->regmap,
+		MAX98925_DAI_CLK_DIV_M_MSBS, m >> 8);
+	regmap_write(max98925->regmap,
+		MAX98925_DAI_CLK_DIV_M_LSBS, m & 0xFF);
+	/* set DAI n divider */
+	regmap_write(max98925->regmap,
+		MAX98925_DAI_CLK_DIV_N_MSBS, n >> 8);
+	regmap_write(max98925->regmap,
+		MAX98925_DAI_CLK_DIV_N_LSBS, n & 0xFF);
+	/* set MDLL */
+	regmap_update_bits(max98925->regmap, MAX98925_DAI_CLK_MODE1,
+			M98925_MDLL_MULT_MASK, mdll << M98925_MDLL_MULT_SHIFT);
+	return 0;
+}
+
+static int max98925_dai_hw_params(struct snd_pcm_substream *substream,
+				   struct snd_pcm_hw_params *params,
+				   struct snd_soc_dai *dai)
+{
+	struct snd_soc_component *component = dai->component;
+	struct max98925_priv *max98925 = snd_soc_component_get_drvdata(component);
+
+	switch (params_width(params)) {
+	case 16:
+		regmap_update_bits(max98925->regmap,
+				MAX98925_FORMAT,
+				M98925_DAI_CHANSZ_MASK, M98925_DAI_CHANSZ_16);
+		max98925->ch_size = 16;
+		break;
+	case 24:
+		regmap_update_bits(max98925->regmap,
+				MAX98925_FORMAT,
+				M98925_DAI_CHANSZ_MASK, M98925_DAI_CHANSZ_24);
+		max98925->ch_size = 24;
+		break;
+	case 32:
+		regmap_update_bits(max98925->regmap,
+				MAX98925_FORMAT,
+				M98925_DAI_CHANSZ_MASK, M98925_DAI_CHANSZ_32);
+		max98925->ch_size = 32;
+		break;
+	default:
+		pr_err("%s: format unsupported %d",
+				__func__, params_format(params));
+		return -EINVAL;
+	}
+	dev_dbg(component->dev, "%s: format supported %d",
+				__func__, params_format(params));
+	return max98925_set_clock(max98925, params);
+}
+
+static int max98925_dai_set_sysclk(struct snd_soc_dai *dai,
+				   int clk_id, unsigned int freq, int dir)
+{
+	struct snd_soc_component *component = dai->component;
+	struct max98925_priv *max98925 = snd_soc_component_get_drvdata(component);
+
+	switch (clk_id) {
+	case 0:
+		/* use MCLK for Left channel, right channel always BCLK */
+		regmap_update_bits(max98925->regmap,
+				MAX98925_DAI_CLK_MODE1,
+				M98925_DAI_CLK_SOURCE_MASK, 0);
+		break;
+	case 1:
+		/* configure dai clock source to BCLK instead of MCLK */
+		regmap_update_bits(max98925->regmap,
+				MAX98925_DAI_CLK_MODE1,
+				M98925_DAI_CLK_SOURCE_MASK,
+				M98925_DAI_CLK_SOURCE_MASK);
+		break;
+	default:
+		return -EINVAL;
+	}
+	max98925->sysclk = freq;
+	return 0;
+}
+
+#define MAX98925_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
+			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
+
+static const struct snd_soc_dai_ops max98925_dai_ops = {
+	.set_sysclk = max98925_dai_set_sysclk,
+	.set_fmt = max98925_dai_set_fmt,
+	.hw_params = max98925_dai_hw_params,
+};
+
+static struct snd_soc_dai_driver max98925_dai[] = {
+	{
+		.name = "max98925-aif1",
+		.playback = {
+			.stream_name = "HiFi Playback",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = SNDRV_PCM_RATE_8000_48000,
+			.formats = MAX98925_FORMATS,
+		},
+		.capture = {
+			.stream_name = "HiFi Capture",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = SNDRV_PCM_RATE_8000_48000,
+			.formats = MAX98925_FORMATS,
+		},
+		.ops = &max98925_dai_ops,
+	}
+};
+
+static int max98925_probe(struct snd_soc_component *component)
+{
+	struct max98925_priv *max98925 = snd_soc_component_get_drvdata(component);
+
+	max98925->component = component;
+	regmap_write(max98925->regmap, MAX98925_GLOBAL_ENABLE, 0x00);
+	/* It's not the default but we need to set DAI_DLY */
+	regmap_write(max98925->regmap,
+			MAX98925_FORMAT, M98925_DAI_DLY_MASK);
+	regmap_write(max98925->regmap, MAX98925_TDM_SLOT_SELECT, 0xC8);
+	regmap_write(max98925->regmap, MAX98925_DOUT_HIZ_CFG1, 0xFF);
+	regmap_write(max98925->regmap, MAX98925_DOUT_HIZ_CFG2, 0xFF);
+	regmap_write(max98925->regmap, MAX98925_DOUT_HIZ_CFG3, 0xFF);
+	regmap_write(max98925->regmap, MAX98925_DOUT_HIZ_CFG4, 0xF0);
+	regmap_write(max98925->regmap, MAX98925_FILTERS, 0xD8);
+	regmap_write(max98925->regmap, MAX98925_ALC_CONFIGURATION, 0xF8);
+	regmap_write(max98925->regmap, MAX98925_CONFIGURATION, 0xF0);
+	/* Disable ALC muting */
+	regmap_write(max98925->regmap, MAX98925_BOOST_LIMITER, 0xF8);
+	return 0;
+}
+
+static const struct snd_soc_component_driver soc_component_dev_max98925 = {
+	.probe			= max98925_probe,
+	.controls		= max98925_snd_controls,
+	.num_controls		= ARRAY_SIZE(max98925_snd_controls),
+	.dapm_routes		= max98925_audio_map,
+	.num_dapm_routes	= ARRAY_SIZE(max98925_audio_map),
+	.dapm_widgets		= max98925_dapm_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(max98925_dapm_widgets),
+	.idle_bias_on		= 1,
+	.use_pmdown_time	= 1,
+	.endianness		= 1,
+	.non_legacy_dai_naming	= 1,
+};
+
+static const struct regmap_config max98925_regmap = {
+	.reg_bits         = 8,
+	.val_bits         = 8,
+	.max_register     = MAX98925_REV_VERSION,
+	.reg_defaults     = max98925_reg,
+	.num_reg_defaults = ARRAY_SIZE(max98925_reg),
+	.volatile_reg     = max98925_volatile_register,
+	.readable_reg     = max98925_readable_register,
+	.cache_type       = REGCACHE_RBTREE,
+};
+
+static int max98925_i2c_probe(struct i2c_client *i2c,
+			     const struct i2c_device_id *id)
+{
+	int ret, reg;
+	u32 value;
+	struct max98925_priv *max98925;
+
+	max98925 = devm_kzalloc(&i2c->dev,
+			sizeof(*max98925), GFP_KERNEL);
+	if (!max98925)
+		return -ENOMEM;
+
+	i2c_set_clientdata(i2c, max98925);
+	max98925->regmap = devm_regmap_init_i2c(i2c, &max98925_regmap);
+	if (IS_ERR(max98925->regmap)) {
+		ret = PTR_ERR(max98925->regmap);
+		dev_err(&i2c->dev,
+				"Failed to allocate regmap: %d\n", ret);
+		return ret;
+	}
+
+	if (!of_property_read_u32(i2c->dev.of_node, "vmon-slot-no", &value)) {
+		if (value > M98925_DAI_VMON_SLOT_1E_1F) {
+			dev_err(&i2c->dev, "vmon slot number is wrong:\n");
+			return -EINVAL;
+		}
+		max98925->v_slot = value;
+	}
+	if (!of_property_read_u32(i2c->dev.of_node, "imon-slot-no", &value)) {
+		if (value > M98925_DAI_IMON_SLOT_1E_1F) {
+			dev_err(&i2c->dev, "imon slot number is wrong:\n");
+			return -EINVAL;
+		}
+		max98925->i_slot = value;
+	}
+
+	ret = regmap_read(max98925->regmap, MAX98925_REV_VERSION, &reg);
+	if (ret < 0) {
+		dev_err(&i2c->dev, "Read revision failed\n");
+		return ret;
+	}
+
+	if ((reg != MAX98925_VERSION) && (reg != MAX98925_VERSION1)) {
+		ret = -ENODEV;
+		dev_err(&i2c->dev, "Invalid revision (%d 0x%02X)\n",
+			ret, reg);
+		return ret;
+	}
+
+	dev_info(&i2c->dev, "device version 0x%02X\n", reg);
+
+	ret = devm_snd_soc_register_component(&i2c->dev,
+			&soc_component_dev_max98925,
+			max98925_dai, ARRAY_SIZE(max98925_dai));
+	if (ret < 0)
+		dev_err(&i2c->dev,
+				"Failed to register component: %d\n", ret);
+	return ret;
+}
+
+static const struct i2c_device_id max98925_i2c_id[] = {
+	{ "max98925", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, max98925_i2c_id);
+
+static const struct of_device_id max98925_of_match[] = {
+	{ .compatible = "maxim,max98925", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, max98925_of_match);
+
+static struct i2c_driver max98925_i2c_driver = {
+	.driver = {
+		.name = "max98925",
+		.of_match_table = of_match_ptr(max98925_of_match),
+		.pm = NULL,
+	},
+	.probe  = max98925_i2c_probe,
+	.id_table = max98925_i2c_id,
+};
+
+module_i2c_driver(max98925_i2c_driver)
+
+MODULE_DESCRIPTION("ALSA SoC MAX98925 driver");
+MODULE_AUTHOR("Ralph Birt <rdbirt@gmail.com>, Anish kumar <anish.kumar@maximintegrated.com>");
+MODULE_LICENSE("GPL");