- 根目录:
- sound
- soc
- codecs
- max98925.c
/*
* 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_codec *codec = snd_soc_kcontrol_codec(kcontrol);
struct max98925_priv *max98925 = snd_soc_codec_get_drvdata(codec);
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_codec *codec,
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;
}
}
dev_dbg(codec->dev, "%s: sample rate is %d, returning %d\n",
__func__, rate_table[i].rate, *value);
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_codec *codec = codec_dai->codec;
struct max98925_priv *max98925 = snd_soc_codec_get_drvdata(codec);
unsigned int invert = 0;
dev_dbg(codec->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(codec->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(codec->dev, "DAI invert mode unsupported");
return -EINVAL;
}
regmap_update_bits(max98925->regmap, MAX98925_FORMAT,
M98925_DAI_BCI_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_codec *codec = max98925->codec;
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->codec->dev, "unsupported sysclk %d\n",
max98925->sysclk);
return -EINVAL;
}
if (max98925_rate_value(codec, 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_codec *codec = dai->codec;
struct max98925_priv *max98925 = snd_soc_codec_get_drvdata(codec);
switch (snd_pcm_format_width(params_format(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(codec->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_codec *codec = dai->codec;
struct max98925_priv *max98925 = snd_soc_codec_get_drvdata(codec);
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_codec *codec)
{
struct max98925_priv *max98925 = snd_soc_codec_get_drvdata(codec);
max98925->codec = codec;
codec->control_data = max98925->regmap;
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_codec_driver soc_codec_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),
};
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);
goto err_out;
}
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, ®);
if ((ret < 0) ||
((reg != MAX98925_VERSION) &&
(reg != MAX98925_VERSION1))) {
dev_err(&i2c->dev,
"device initialization error (%d 0x%02X)\n",
ret, reg);
goto err_out;
}
dev_info(&i2c->dev, "device version 0x%02X\n", reg);
ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_max98925,
max98925_dai, ARRAY_SIZE(max98925_dai));
if (ret < 0)
dev_err(&i2c->dev,
"Failed to register codec: %d\n", ret);
err_out:
return ret;
}
static int max98925_i2c_remove(struct i2c_client *client)
{
snd_soc_unregister_codec(&client->dev);
return 0;
}
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",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(max98925_of_match),
.pm = NULL,
},
.probe = max98925_i2c_probe,
.remove = max98925_i2c_remove,
.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");