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linux/sound/soc/codecs/cs42l51.c
Bhumika Goyal a180ba45b1 ASoC: codecs: add const to snd_soc_codec_driver structures 
Declare snd_soc_codec_driver structures as const as they are only passed
as an argument to the function snd_soc_register_codec. This argument is
of type const, so declare the structures with this property as const.
In file codecs/sn95031.c, snd_soc_codec_driver structure is also used in
a copy operation along with getting passed to snd_soc_register_codec.
So, it can be made const too.
Done using Coccinelle:

@match disable optional_qualifier@
identifier s;
position p;
@@
static struct snd_soc_codec_driver s@p={...};

@good1@
identifier match.s;
position p;
@@
snd_soc_register_codec(...,&s@p,...)

@bad@
identifier match.s;
position p!={match.p,good1.p};
@@
s@p

@depends on !bad disable optional_qualifier@
identifier match.s;
@@
static
+const
struct snd_soc_codec_driver s={...};

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2017-08-10 16:10:50 +01:00

575 lines
16 KiB
C
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/*
* cs42l51.c
*
* ASoC Driver for Cirrus Logic CS42L51 codecs
*
* Copyright (c) 2010 Arnaud Patard <apatard@mandriva.com>
*
* Based on cs4270.c - Copyright (c) Freescale Semiconductor
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* For now:
* - Only I2C is support. Not SPI
* - master mode *NOT* supported
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <sound/initval.h>
#include <sound/pcm_params.h>
#include <sound/pcm.h>
#include <linux/regmap.h>
#include "cs42l51.h"
enum master_slave_mode {
MODE_SLAVE,
MODE_SLAVE_AUTO,
MODE_MASTER,
};
struct cs42l51_private {
unsigned int mclk;
unsigned int audio_mode; /* The mode (I2S or left-justified) */
enum master_slave_mode func;
};
#define CS42L51_FORMATS ( \
SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | \
SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \
SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE)
static int cs42l51_get_chan_mix(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
unsigned long value = snd_soc_read(codec, CS42L51_PCM_MIXER)&3;
switch (value) {
default:
case 0:
ucontrol->value.enumerated.item[0] = 0;
break;
/* same value : (L+R)/2 and (R+L)/2 */
case 1:
case 2:
ucontrol->value.enumerated.item[0] = 1;
break;
case 3:
ucontrol->value.enumerated.item[0] = 2;
break;
}
return 0;
}
#define CHAN_MIX_NORMAL 0x00
#define CHAN_MIX_BOTH 0x55
#define CHAN_MIX_SWAP 0xFF
static int cs42l51_set_chan_mix(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
unsigned char val;
switch (ucontrol->value.enumerated.item[0]) {
default:
case 0:
val = CHAN_MIX_NORMAL;
break;
case 1:
val = CHAN_MIX_BOTH;
break;
case 2:
val = CHAN_MIX_SWAP;
break;
}
snd_soc_write(codec, CS42L51_PCM_MIXER, val);
return 1;
}
static const DECLARE_TLV_DB_SCALE(adc_pcm_tlv, -5150, 50, 0);
static const DECLARE_TLV_DB_SCALE(tone_tlv, -1050, 150, 0);
static const DECLARE_TLV_DB_SCALE(aout_tlv, -10200, 50, 0);
static const DECLARE_TLV_DB_SCALE(boost_tlv, 1600, 1600, 0);
static const char *chan_mix[] = {
"L R",
"L+R",
"R L",
};
static SOC_ENUM_SINGLE_EXT_DECL(cs42l51_chan_mix, chan_mix);
static const struct snd_kcontrol_new cs42l51_snd_controls[] = {
SOC_DOUBLE_R_SX_TLV("PCM Playback Volume",
CS42L51_PCMA_VOL, CS42L51_PCMB_VOL,
0, 0x19, 0x7F, adc_pcm_tlv),
SOC_DOUBLE_R("PCM Playback Switch",
CS42L51_PCMA_VOL, CS42L51_PCMB_VOL, 7, 1, 1),
SOC_DOUBLE_R_SX_TLV("Analog Playback Volume",
CS42L51_AOUTA_VOL, CS42L51_AOUTB_VOL,
0, 0x34, 0xE4, aout_tlv),
SOC_DOUBLE_R_SX_TLV("ADC Mixer Volume",
CS42L51_ADCA_VOL, CS42L51_ADCB_VOL,
0, 0x19, 0x7F, adc_pcm_tlv),
SOC_DOUBLE_R("ADC Mixer Switch",
CS42L51_ADCA_VOL, CS42L51_ADCB_VOL, 7, 1, 1),
SOC_SINGLE("Playback Deemphasis Switch", CS42L51_DAC_CTL, 3, 1, 0),
SOC_SINGLE("Auto-Mute Switch", CS42L51_DAC_CTL, 2, 1, 0),
SOC_SINGLE("Soft Ramp Switch", CS42L51_DAC_CTL, 1, 1, 0),
SOC_SINGLE("Zero Cross Switch", CS42L51_DAC_CTL, 0, 0, 0),
SOC_DOUBLE_TLV("Mic Boost Volume",
CS42L51_MIC_CTL, 0, 1, 1, 0, boost_tlv),
SOC_SINGLE_TLV("Bass Volume", CS42L51_TONE_CTL, 0, 0xf, 1, tone_tlv),
SOC_SINGLE_TLV("Treble Volume", CS42L51_TONE_CTL, 4, 0xf, 1, tone_tlv),
SOC_ENUM_EXT("PCM channel mixer",
cs42l51_chan_mix,
cs42l51_get_chan_mix, cs42l51_set_chan_mix),
};
/*
* to power down, one must:
* 1.) Enable the PDN bit
* 2.) enable power-down for the select channels
* 3.) disable the PDN bit.
*/
static int cs42l51_pdn_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
switch (event) {
case SND_SOC_DAPM_PRE_PMD:
snd_soc_update_bits(codec, CS42L51_POWER_CTL1,
CS42L51_POWER_CTL1_PDN,
CS42L51_POWER_CTL1_PDN);
break;
default:
case SND_SOC_DAPM_POST_PMD:
snd_soc_update_bits(codec, CS42L51_POWER_CTL1,
CS42L51_POWER_CTL1_PDN, 0);
break;
}
return 0;
}
static const char *cs42l51_dac_names[] = {"Direct PCM",
"DSP PCM", "ADC"};
static SOC_ENUM_SINGLE_DECL(cs42l51_dac_mux_enum,
CS42L51_DAC_CTL, 6, cs42l51_dac_names);
static const struct snd_kcontrol_new cs42l51_dac_mux_controls =
SOC_DAPM_ENUM("Route", cs42l51_dac_mux_enum);
static const char *cs42l51_adcl_names[] = {"AIN1 Left", "AIN2 Left",
"MIC Left", "MIC+preamp Left"};
static SOC_ENUM_SINGLE_DECL(cs42l51_adcl_mux_enum,
CS42L51_ADC_INPUT, 4, cs42l51_adcl_names);
static const struct snd_kcontrol_new cs42l51_adcl_mux_controls =
SOC_DAPM_ENUM("Route", cs42l51_adcl_mux_enum);
static const char *cs42l51_adcr_names[] = {"AIN1 Right", "AIN2 Right",
"MIC Right", "MIC+preamp Right"};
static SOC_ENUM_SINGLE_DECL(cs42l51_adcr_mux_enum,
CS42L51_ADC_INPUT, 6, cs42l51_adcr_names);
static const struct snd_kcontrol_new cs42l51_adcr_mux_controls =
SOC_DAPM_ENUM("Route", cs42l51_adcr_mux_enum);
static const struct snd_soc_dapm_widget cs42l51_dapm_widgets[] = {
SND_SOC_DAPM_MICBIAS("Mic Bias", CS42L51_MIC_POWER_CTL, 1, 1),
SND_SOC_DAPM_PGA_E("Left PGA", CS42L51_POWER_CTL1, 3, 1, NULL, 0,
cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
SND_SOC_DAPM_PGA_E("Right PGA", CS42L51_POWER_CTL1, 4, 1, NULL, 0,
cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
SND_SOC_DAPM_ADC_E("Left ADC", "Left HiFi Capture",
CS42L51_POWER_CTL1, 1, 1,
cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
SND_SOC_DAPM_ADC_E("Right ADC", "Right HiFi Capture",
CS42L51_POWER_CTL1, 2, 1,
cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
SND_SOC_DAPM_DAC_E("Left DAC", "Left HiFi Playback",
CS42L51_POWER_CTL1, 5, 1,
cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
SND_SOC_DAPM_DAC_E("Right DAC", "Right HiFi Playback",
CS42L51_POWER_CTL1, 6, 1,
cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
/* analog/mic */
SND_SOC_DAPM_INPUT("AIN1L"),
SND_SOC_DAPM_INPUT("AIN1R"),
SND_SOC_DAPM_INPUT("AIN2L"),
SND_SOC_DAPM_INPUT("AIN2R"),
SND_SOC_DAPM_INPUT("MICL"),
SND_SOC_DAPM_INPUT("MICR"),
SND_SOC_DAPM_MIXER("Mic Preamp Left",
CS42L51_MIC_POWER_CTL, 2, 1, NULL, 0),
SND_SOC_DAPM_MIXER("Mic Preamp Right",
CS42L51_MIC_POWER_CTL, 3, 1, NULL, 0),
/* HP */
SND_SOC_DAPM_OUTPUT("HPL"),
SND_SOC_DAPM_OUTPUT("HPR"),
/* mux */
SND_SOC_DAPM_MUX("DAC Mux", SND_SOC_NOPM, 0, 0,
&cs42l51_dac_mux_controls),
SND_SOC_DAPM_MUX("PGA-ADC Mux Left", SND_SOC_NOPM, 0, 0,
&cs42l51_adcl_mux_controls),
SND_SOC_DAPM_MUX("PGA-ADC Mux Right", SND_SOC_NOPM, 0, 0,
&cs42l51_adcr_mux_controls),
};
static const struct snd_soc_dapm_route cs42l51_routes[] = {
{"HPL", NULL, "Left DAC"},
{"HPR", NULL, "Right DAC"},
{"Left ADC", NULL, "Left PGA"},
{"Right ADC", NULL, "Right PGA"},
{"Mic Preamp Left", NULL, "MICL"},
{"Mic Preamp Right", NULL, "MICR"},
{"PGA-ADC Mux Left", "AIN1 Left", "AIN1L" },
{"PGA-ADC Mux Left", "AIN2 Left", "AIN2L" },
{"PGA-ADC Mux Left", "MIC Left", "MICL" },
{"PGA-ADC Mux Left", "MIC+preamp Left", "Mic Preamp Left" },
{"PGA-ADC Mux Right", "AIN1 Right", "AIN1R" },
{"PGA-ADC Mux Right", "AIN2 Right", "AIN2R" },
{"PGA-ADC Mux Right", "MIC Right", "MICR" },
{"PGA-ADC Mux Right", "MIC+preamp Right", "Mic Preamp Right" },
{"Left PGA", NULL, "PGA-ADC Mux Left"},
{"Right PGA", NULL, "PGA-ADC Mux Right"},
};
static int cs42l51_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int format)
{
struct snd_soc_codec *codec = codec_dai->codec;
struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
case SND_SOC_DAIFMT_LEFT_J:
case SND_SOC_DAIFMT_RIGHT_J:
cs42l51->audio_mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
break;
default:
dev_err(codec->dev, "invalid DAI format\n");
return -EINVAL;
}
switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
cs42l51->func = MODE_MASTER;
break;
case SND_SOC_DAIFMT_CBS_CFS:
cs42l51->func = MODE_SLAVE_AUTO;
break;
default:
dev_err(codec->dev, "Unknown master/slave configuration\n");
return -EINVAL;
}
return 0;
}
struct cs42l51_ratios {
unsigned int ratio;
unsigned char speed_mode;
unsigned char mclk;
};
static struct cs42l51_ratios slave_ratios[] = {
{ 512, CS42L51_QSM_MODE, 0 }, { 768, CS42L51_QSM_MODE, 0 },
{ 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
{ 2048, CS42L51_QSM_MODE, 0 }, { 3072, CS42L51_QSM_MODE, 0 },
{ 256, CS42L51_HSM_MODE, 0 }, { 384, CS42L51_HSM_MODE, 0 },
{ 512, CS42L51_HSM_MODE, 0 }, { 768, CS42L51_HSM_MODE, 0 },
{ 1024, CS42L51_HSM_MODE, 0 }, { 1536, CS42L51_HSM_MODE, 0 },
{ 128, CS42L51_SSM_MODE, 0 }, { 192, CS42L51_SSM_MODE, 0 },
{ 256, CS42L51_SSM_MODE, 0 }, { 384, CS42L51_SSM_MODE, 0 },
{ 512, CS42L51_SSM_MODE, 0 }, { 768, CS42L51_SSM_MODE, 0 },
{ 128, CS42L51_DSM_MODE, 0 }, { 192, CS42L51_DSM_MODE, 0 },
{ 256, CS42L51_DSM_MODE, 0 }, { 384, CS42L51_DSM_MODE, 0 },
};
static struct cs42l51_ratios slave_auto_ratios[] = {
{ 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
{ 2048, CS42L51_QSM_MODE, 1 }, { 3072, CS42L51_QSM_MODE, 1 },
{ 512, CS42L51_HSM_MODE, 0 }, { 768, CS42L51_HSM_MODE, 0 },
{ 1024, CS42L51_HSM_MODE, 1 }, { 1536, CS42L51_HSM_MODE, 1 },
{ 256, CS42L51_SSM_MODE, 0 }, { 384, CS42L51_SSM_MODE, 0 },
{ 512, CS42L51_SSM_MODE, 1 }, { 768, CS42L51_SSM_MODE, 1 },
{ 128, CS42L51_DSM_MODE, 0 }, { 192, CS42L51_DSM_MODE, 0 },
{ 256, CS42L51_DSM_MODE, 1 }, { 384, CS42L51_DSM_MODE, 1 },
};
static int cs42l51_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 cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
cs42l51->mclk = freq;
return 0;
}
static int cs42l51_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 cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
int ret;
unsigned int i;
unsigned int rate;
unsigned int ratio;
struct cs42l51_ratios *ratios = NULL;
int nr_ratios = 0;
int intf_ctl, power_ctl, fmt;
switch (cs42l51->func) {
case MODE_MASTER:
return -EINVAL;
case MODE_SLAVE:
ratios = slave_ratios;
nr_ratios = ARRAY_SIZE(slave_ratios);
break;
case MODE_SLAVE_AUTO:
ratios = slave_auto_ratios;
nr_ratios = ARRAY_SIZE(slave_auto_ratios);
break;
}
/* Figure out which MCLK/LRCK ratio to use */
rate = params_rate(params); /* Sampling rate, in Hz */
ratio = cs42l51->mclk / rate; /* MCLK/LRCK ratio */
for (i = 0; i < nr_ratios; i++) {
if (ratios[i].ratio == ratio)
break;
}
if (i == nr_ratios) {
/* We did not find a matching ratio */
dev_err(codec->dev, "could not find matching ratio\n");
return -EINVAL;
}
intf_ctl = snd_soc_read(codec, CS42L51_INTF_CTL);
power_ctl = snd_soc_read(codec, CS42L51_MIC_POWER_CTL);
intf_ctl &= ~(CS42L51_INTF_CTL_MASTER | CS42L51_INTF_CTL_ADC_I2S
| CS42L51_INTF_CTL_DAC_FORMAT(7));
power_ctl &= ~(CS42L51_MIC_POWER_CTL_SPEED(3)
| CS42L51_MIC_POWER_CTL_MCLK_DIV2);
switch (cs42l51->func) {
case MODE_MASTER:
intf_ctl |= CS42L51_INTF_CTL_MASTER;
power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
break;
case MODE_SLAVE:
power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
break;
case MODE_SLAVE_AUTO:
power_ctl |= CS42L51_MIC_POWER_CTL_AUTO;
break;
}
switch (cs42l51->audio_mode) {
case SND_SOC_DAIFMT_I2S:
intf_ctl |= CS42L51_INTF_CTL_ADC_I2S;
intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_I2S);
break;
case SND_SOC_DAIFMT_LEFT_J:
intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_LJ24);
break;
case SND_SOC_DAIFMT_RIGHT_J:
switch (params_width(params)) {
case 16:
fmt = CS42L51_DAC_DIF_RJ16;
break;
case 18:
fmt = CS42L51_DAC_DIF_RJ18;
break;
case 20:
fmt = CS42L51_DAC_DIF_RJ20;
break;
case 24:
fmt = CS42L51_DAC_DIF_RJ24;
break;
default:
dev_err(codec->dev, "unknown format\n");
return -EINVAL;
}
intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(fmt);
break;
default:
dev_err(codec->dev, "unknown format\n");
return -EINVAL;
}
if (ratios[i].mclk)
power_ctl |= CS42L51_MIC_POWER_CTL_MCLK_DIV2;
ret = snd_soc_write(codec, CS42L51_INTF_CTL, intf_ctl);
if (ret < 0)
return ret;
ret = snd_soc_write(codec, CS42L51_MIC_POWER_CTL, power_ctl);
if (ret < 0)
return ret;
return 0;
}
static int cs42l51_dai_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
int reg;
int mask = CS42L51_DAC_OUT_CTL_DACA_MUTE|CS42L51_DAC_OUT_CTL_DACB_MUTE;
reg = snd_soc_read(codec, CS42L51_DAC_OUT_CTL);
if (mute)
reg |= mask;
else
reg &= ~mask;
return snd_soc_write(codec, CS42L51_DAC_OUT_CTL, reg);
}
static const struct snd_soc_dai_ops cs42l51_dai_ops = {
.hw_params = cs42l51_hw_params,
.set_sysclk = cs42l51_set_dai_sysclk,
.set_fmt = cs42l51_set_dai_fmt,
.digital_mute = cs42l51_dai_mute,
};
static struct snd_soc_dai_driver cs42l51_dai = {
.name = "cs42l51-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_96000,
.formats = CS42L51_FORMATS,
},
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_96000,
.formats = CS42L51_FORMATS,
},
.ops = &cs42l51_dai_ops,
};
static int cs42l51_codec_probe(struct snd_soc_codec *codec)
{
int ret, reg;
/*
* DAC configuration
* - Use signal processor
* - auto mute
* - vol changes immediate
* - no de-emphasize
*/
reg = CS42L51_DAC_CTL_DATA_SEL(1)
| CS42L51_DAC_CTL_AMUTE | CS42L51_DAC_CTL_DACSZ(0);
ret = snd_soc_write(codec, CS42L51_DAC_CTL, reg);
if (ret < 0)
return ret;
return 0;
}
static const struct snd_soc_codec_driver soc_codec_device_cs42l51 = {
.probe = cs42l51_codec_probe,
.component_driver = {
.controls = cs42l51_snd_controls,
.num_controls = ARRAY_SIZE(cs42l51_snd_controls),
.dapm_widgets = cs42l51_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(cs42l51_dapm_widgets),
.dapm_routes = cs42l51_routes,
.num_dapm_routes = ARRAY_SIZE(cs42l51_routes),
},
};
const struct regmap_config cs42l51_regmap = {
.max_register = CS42L51_CHARGE_FREQ,
.cache_type = REGCACHE_RBTREE,
};
EXPORT_SYMBOL_GPL(cs42l51_regmap);
int cs42l51_probe(struct device *dev, struct regmap *regmap)
{
struct cs42l51_private *cs42l51;
unsigned int val;
int ret;
if (IS_ERR(regmap))
return PTR_ERR(regmap);
cs42l51 = devm_kzalloc(dev, sizeof(struct cs42l51_private),
GFP_KERNEL);
if (!cs42l51)
return -ENOMEM;
dev_set_drvdata(dev, cs42l51);
/* Verify that we have a CS42L51 */
ret = regmap_read(regmap, CS42L51_CHIP_REV_ID, &val);
if (ret < 0) {
dev_err(dev, "failed to read I2C\n");
goto error;
}
if ((val != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_A)) &&
(val != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_B))) {
dev_err(dev, "Invalid chip id: %x\n", val);
ret = -ENODEV;
goto error;
}
dev_info(dev, "Cirrus Logic CS42L51, Revision: %02X\n",
val & CS42L51_CHIP_REV_MASK);
ret = snd_soc_register_codec(dev,
&soc_codec_device_cs42l51, &cs42l51_dai, 1);
error:
return ret;
}
EXPORT_SYMBOL_GPL(cs42l51_probe);
const struct of_device_id cs42l51_of_match[] = {
{ .compatible = "cirrus,cs42l51", },
{ }
};
MODULE_DEVICE_TABLE(of, cs42l51_of_match);
EXPORT_SYMBOL_GPL(cs42l51_of_match);
MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
MODULE_DESCRIPTION("Cirrus Logic CS42L51 ALSA SoC Codec Driver");
MODULE_LICENSE("GPL");
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