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linux/sound/soc/codecs/max9867.c
Pavel Dobias a11ffbbac9
ASoC: max9867: shutdown codec when changing filter type 
Changing filter type without disabling codec results in filter
malfunction. Disable codec when changing filter type.

Signed-off-by: Pavel Dobias <dobias@2n.cz>
Link: https://lore.kernel.org/r/20200827102528.29677-1-dobias@2n.cz
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-08-27 14:43:24 +01:00

672 lines
19 KiB
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// SPDX-License-Identifier: GPL-2.0
//
// MAX9867 ALSA SoC codec driver
//
// Copyright 2013-2015 Maxim Integrated Products
// Copyright 2018 Ladislav Michl <ladis@linux-mips.org>
//
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include "max9867.h"
struct max9867_priv {
struct regmap *regmap;
const struct snd_pcm_hw_constraint_list *constraints;
unsigned int sysclk, pclk;
bool master, dsp_a;
unsigned int adc_dac_active;
};
static const char *const max9867_spmode[] = {
"Stereo Diff", "Mono Diff",
"Stereo Cap", "Mono Cap",
"Stereo Single", "Mono Single",
"Stereo Single Fast", "Mono Single Fast"
};
static const char *const max9867_filter_text[] = {"IIR", "FIR"};
static const char *const max9867_adc_dac_filter_text[] = {
"Disabled",
"Elliptical/16/256",
"Butterworth/16/500",
"Elliptical/8/256",
"Butterworth/8/500",
"Butterworth/8-24"
};
enum max9867_adc_dac {
MAX9867_ADC_LEFT,
MAX9867_ADC_RIGHT,
MAX9867_DAC_LEFT,
MAX9867_DAC_RIGHT,
};
static int max9867_adc_dac_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
enum max9867_adc_dac adc_dac;
if (!strcmp(w->name, "ADCL"))
adc_dac = MAX9867_ADC_LEFT;
else if (!strcmp(w->name, "ADCR"))
adc_dac = MAX9867_ADC_RIGHT;
else if (!strcmp(w->name, "DACL"))
adc_dac = MAX9867_DAC_LEFT;
else if (!strcmp(w->name, "DACR"))
adc_dac = MAX9867_DAC_RIGHT;
else
return 0;
if (SND_SOC_DAPM_EVENT_ON(event))
max9867->adc_dac_active |= BIT(adc_dac);
else if (SND_SOC_DAPM_EVENT_OFF(event))
max9867->adc_dac_active &= ~BIT(adc_dac);
return 0;
}
static int max9867_filter_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
unsigned int reg;
int ret;
ret = regmap_read(max9867->regmap, MAX9867_CODECFLTR, &reg);
if (ret)
return -EINVAL;
if (reg & MAX9867_CODECFLTR_MODE)
ucontrol->value.enumerated.item[0] = 1;
else
ucontrol->value.enumerated.item[0] = 0;
return 0;
}
static int max9867_filter_set(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
unsigned int reg, mode = ucontrol->value.enumerated.item[0];
int ret;
if (mode > 1)
return -EINVAL;
/* don't allow change if ADC/DAC active */
if (max9867->adc_dac_active)
return -EBUSY;
/* read current filter mode */
ret = regmap_read(max9867->regmap, MAX9867_CODECFLTR, &reg);
if (ret)
return -EINVAL;
if (mode)
mode = MAX9867_CODECFLTR_MODE;
/* check if change is needed */
if ((reg & MAX9867_CODECFLTR_MODE) == mode)
return 0;
/* shutdown codec before switching filter mode */
regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
MAX9867_PWRMAN_SHDN, 0);
/* switch filter mode */
regmap_update_bits(max9867->regmap, MAX9867_CODECFLTR,
MAX9867_CODECFLTR_MODE, mode);
/* out of shutdown now */
regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
MAX9867_PWRMAN_SHDN, MAX9867_PWRMAN_SHDN);
return 0;
}
static SOC_ENUM_SINGLE_EXT_DECL(max9867_filter, max9867_filter_text);
static SOC_ENUM_SINGLE_DECL(max9867_dac_filter, MAX9867_CODECFLTR, 0,
max9867_adc_dac_filter_text);
static SOC_ENUM_SINGLE_DECL(max9867_adc_filter, MAX9867_CODECFLTR, 4,
max9867_adc_dac_filter_text);
static SOC_ENUM_SINGLE_DECL(max9867_spkmode, MAX9867_MODECONFIG, 0,
max9867_spmode);
static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(max9867_master_tlv,
0, 2, TLV_DB_SCALE_ITEM(-8600, 200, 1),
3, 17, TLV_DB_SCALE_ITEM(-7800, 400, 0),
18, 25, TLV_DB_SCALE_ITEM(-2000, 200, 0),
26, 34, TLV_DB_SCALE_ITEM( -500, 100, 0),
35, 40, TLV_DB_SCALE_ITEM( 350, 50, 0),
);
static DECLARE_TLV_DB_SCALE(max9867_mic_tlv, 0, 100, 0);
static DECLARE_TLV_DB_SCALE(max9867_line_tlv, -600, 200, 0);
static DECLARE_TLV_DB_SCALE(max9867_adc_tlv, -1200, 100, 0);
static DECLARE_TLV_DB_SCALE(max9867_dac_tlv, -1500, 100, 0);
static DECLARE_TLV_DB_SCALE(max9867_dacboost_tlv, 0, 600, 0);
static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(max9867_micboost_tlv,
0, 2, TLV_DB_SCALE_ITEM(-2000, 2000, 1),
3, 3, TLV_DB_SCALE_ITEM(3000, 0, 0),
);
static const struct snd_kcontrol_new max9867_snd_controls[] = {
SOC_DOUBLE_R_TLV("Master Playback Volume", MAX9867_LEFTVOL,
MAX9867_RIGHTVOL, 0, 40, 1, max9867_master_tlv),
SOC_DOUBLE_R_TLV("Line Capture Volume", MAX9867_LEFTLINELVL,
MAX9867_RIGHTLINELVL, 0, 15, 1, max9867_line_tlv),
SOC_DOUBLE_R_TLV("Mic Capture Volume", MAX9867_LEFTMICGAIN,
MAX9867_RIGHTMICGAIN, 0, 20, 1, max9867_mic_tlv),
SOC_DOUBLE_R_TLV("Mic Boost Capture Volume", MAX9867_LEFTMICGAIN,
MAX9867_RIGHTMICGAIN, 5, 3, 0, max9867_micboost_tlv),
SOC_SINGLE("Digital Sidetone Volume", MAX9867_SIDETONE, 0, 31, 1),
SOC_SINGLE_TLV("Digital Playback Volume", MAX9867_DACLEVEL, 0, 15, 1,
max9867_dac_tlv),
SOC_SINGLE_TLV("Digital Boost Playback Volume", MAX9867_DACLEVEL, 4, 3, 0,
max9867_dacboost_tlv),
SOC_DOUBLE_TLV("Digital Capture Volume", MAX9867_ADCLEVEL, 4, 0, 15, 1,
max9867_adc_tlv),
SOC_ENUM("Speaker Mode", max9867_spkmode),
SOC_SINGLE("Volume Smoothing Switch", MAX9867_MODECONFIG, 6, 1, 0),
SOC_SINGLE("Line ZC Switch", MAX9867_MODECONFIG, 5, 1, 0),
SOC_ENUM_EXT("DSP Filter", max9867_filter, max9867_filter_get, max9867_filter_set),
SOC_ENUM("ADC Filter", max9867_adc_filter),
SOC_ENUM("DAC Filter", max9867_dac_filter),
SOC_SINGLE("Mono Playback Switch", MAX9867_IFC1B, 3, 1, 0),
};
/* Input mixer */
static const struct snd_kcontrol_new max9867_input_mixer_controls[] = {
SOC_DAPM_DOUBLE("Line Capture Switch", MAX9867_INPUTCONFIG, 7, 5, 1, 0),
SOC_DAPM_DOUBLE("Mic Capture Switch", MAX9867_INPUTCONFIG, 6, 4, 1, 0),
};
/* Output mixer */
static const struct snd_kcontrol_new max9867_output_mixer_controls[] = {
SOC_DAPM_DOUBLE_R("Line Bypass Switch",
MAX9867_LEFTLINELVL, MAX9867_RIGHTLINELVL, 6, 1, 1),
};
/* Sidetone mixer */
static const struct snd_kcontrol_new max9867_sidetone_mixer_controls[] = {
SOC_DAPM_DOUBLE("Sidetone Switch", MAX9867_SIDETONE, 6, 7, 1, 0),
};
/* Line out switch */
static const struct snd_kcontrol_new max9867_line_out_control =
SOC_DAPM_DOUBLE_R("Switch",
MAX9867_LEFTVOL, MAX9867_RIGHTVOL, 6, 1, 1);
/* DMIC mux */
static const char *const dmic_mux_text[] = {
"ADC", "DMIC"
};
static SOC_ENUM_SINGLE_DECL(left_dmic_mux_enum,
MAX9867_MICCONFIG, 5, dmic_mux_text);
static SOC_ENUM_SINGLE_DECL(right_dmic_mux_enum,
MAX9867_MICCONFIG, 4, dmic_mux_text);
static const struct snd_kcontrol_new max9867_left_dmic_mux =
SOC_DAPM_ENUM("DMICL Mux", left_dmic_mux_enum);
static const struct snd_kcontrol_new max9867_right_dmic_mux =
SOC_DAPM_ENUM("DMICR Mux", right_dmic_mux_enum);
static const struct snd_soc_dapm_widget max9867_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("MICL"),
SND_SOC_DAPM_INPUT("MICR"),
SND_SOC_DAPM_INPUT("DMICL"),
SND_SOC_DAPM_INPUT("DMICR"),
SND_SOC_DAPM_INPUT("LINL"),
SND_SOC_DAPM_INPUT("LINR"),
SND_SOC_DAPM_PGA("Left Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_PGA("Right Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_MIXER_NAMED_CTL("Input Mixer", SND_SOC_NOPM, 0, 0,
max9867_input_mixer_controls,
ARRAY_SIZE(max9867_input_mixer_controls)),
SND_SOC_DAPM_MUX("DMICL Mux", SND_SOC_NOPM, 0, 0,
&max9867_left_dmic_mux),
SND_SOC_DAPM_MUX("DMICR Mux", SND_SOC_NOPM, 0, 0,
&max9867_right_dmic_mux),
SND_SOC_DAPM_ADC_E("ADCL", "HiFi Capture", SND_SOC_NOPM, 0, 0,
max9867_adc_dac_event,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_ADC_E("ADCR", "HiFi Capture", SND_SOC_NOPM, 0, 0,
max9867_adc_dac_event,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_MIXER("Digital", SND_SOC_NOPM, 0, 0,
max9867_sidetone_mixer_controls,
ARRAY_SIZE(max9867_sidetone_mixer_controls)),
SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", SND_SOC_NOPM, 0, 0,
max9867_output_mixer_controls,
ARRAY_SIZE(max9867_output_mixer_controls)),
SND_SOC_DAPM_DAC_E("DACL", "HiFi Playback", SND_SOC_NOPM, 0, 0,
max9867_adc_dac_event,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_DAC_E("DACR", "HiFi Playback", SND_SOC_NOPM, 0, 0,
max9867_adc_dac_event,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_SWITCH("Master Playback", SND_SOC_NOPM, 0, 0,
&max9867_line_out_control),
SND_SOC_DAPM_OUTPUT("LOUT"),
SND_SOC_DAPM_OUTPUT("ROUT"),
};
static const struct snd_soc_dapm_route max9867_audio_map[] = {
{"Left Line Input", NULL, "LINL"},
{"Right Line Input", NULL, "LINR"},
{"Input Mixer", "Mic Capture Switch", "MICL"},
{"Input Mixer", "Mic Capture Switch", "MICR"},
{"Input Mixer", "Line Capture Switch", "Left Line Input"},
{"Input Mixer", "Line Capture Switch", "Right Line Input"},
{"DMICL Mux", "DMIC", "DMICL"},
{"DMICR Mux", "DMIC", "DMICR"},
{"DMICL Mux", "ADC", "Input Mixer"},
{"DMICR Mux", "ADC", "Input Mixer"},
{"ADCL", NULL, "DMICL Mux"},
{"ADCR", NULL, "DMICR Mux"},
{"Digital", "Sidetone Switch", "ADCL"},
{"Digital", "Sidetone Switch", "ADCR"},
{"DACL", NULL, "Digital"},
{"DACR", NULL, "Digital"},
{"Output Mixer", "Line Bypass Switch", "Left Line Input"},
{"Output Mixer", "Line Bypass Switch", "Right Line Input"},
{"Output Mixer", NULL, "DACL"},
{"Output Mixer", NULL, "DACR"},
{"Master Playback", "Switch", "Output Mixer"},
{"LOUT", NULL, "Master Playback"},
{"ROUT", NULL, "Master Playback"},
};
static const unsigned int max9867_rates_44k1[] = {
11025, 22050, 44100,
};
static const struct snd_pcm_hw_constraint_list max9867_constraints_44k1 = {
.list = max9867_rates_44k1,
.count = ARRAY_SIZE(max9867_rates_44k1),
};
static const unsigned int max9867_rates_48k[] = {
8000, 16000, 32000, 48000,
};
static const struct snd_pcm_hw_constraint_list max9867_constraints_48k = {
.list = max9867_rates_48k,
.count = ARRAY_SIZE(max9867_rates_48k),
};
static int max9867_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct max9867_priv *max9867 =
snd_soc_component_get_drvdata(dai->component);
if (max9867->constraints)
snd_pcm_hw_constraint_list(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_RATE, max9867->constraints);
return 0;
}
static int max9867_dai_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
{
int value;
unsigned long int rate, ratio;
struct snd_soc_component *component = dai->component;
struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
unsigned int ni = DIV_ROUND_CLOSEST_ULL(96ULL * 0x10000 * params_rate(params),
max9867->pclk);
/* set up the ni value */
regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH,
MAX9867_NI_HIGH_MASK, (0xFF00 & ni) >> 8);
regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW,
MAX9867_NI_LOW_MASK, 0x00FF & ni);
if (max9867->master) {
if (max9867->dsp_a) {
value = MAX9867_IFC1B_48X;
} else {
rate = params_rate(params) * 2 * params_width(params);
ratio = max9867->pclk / rate;
switch (params_width(params)) {
case 8:
case 16:
switch (ratio) {
case 2:
value = MAX9867_IFC1B_PCLK_2;
break;
case 4:
value = MAX9867_IFC1B_PCLK_4;
break;
case 8:
value = MAX9867_IFC1B_PCLK_8;
break;
case 16:
value = MAX9867_IFC1B_PCLK_16;
break;
default:
return -EINVAL;
}
break;
case 24:
value = MAX9867_IFC1B_48X;
break;
case 32:
value = MAX9867_IFC1B_64X;
break;
default:
return -EINVAL;
}
}
regmap_update_bits(max9867->regmap, MAX9867_IFC1B,
MAX9867_IFC1B_BCLK_MASK, value);
} else {
/*
* digital pll locks on to any externally supplied LRCLK signal
* and also enable rapid lock mode.
*/
regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW,
MAX9867_RAPID_LOCK, MAX9867_RAPID_LOCK);
regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH,
MAX9867_PLL, MAX9867_PLL);
}
return 0;
}
static int max9867_mute(struct snd_soc_dai *dai, int mute, int direction)
{
struct snd_soc_component *component = dai->component;
struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
return regmap_update_bits(max9867->regmap, MAX9867_DACLEVEL,
1 << 6, !!mute << 6);
}
static int max9867_set_dai_sysclk(struct snd_soc_dai *codec_dai,
int clk_id, unsigned int freq, int dir)
{
struct snd_soc_component *component = codec_dai->component;
struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
int value = 0;
/* Set the prescaler based on the master clock frequency*/
if (freq >= 10000000 && freq <= 20000000) {
value |= MAX9867_PSCLK_10_20;
max9867->pclk = freq;
} else if (freq >= 20000000 && freq <= 40000000) {
value |= MAX9867_PSCLK_20_40;
max9867->pclk = freq / 2;
} else if (freq >= 40000000 && freq <= 60000000) {
value |= MAX9867_PSCLK_40_60;
max9867->pclk = freq / 4;
} else {
dev_err(component->dev,
"Invalid clock frequency %uHz (required 10-60MHz)\n",
freq);
return -EINVAL;
}
if (freq % 48000 == 0)
max9867->constraints = &max9867_constraints_48k;
else if (freq % 44100 == 0)
max9867->constraints = &max9867_constraints_44k1;
else
dev_warn(component->dev,
"Unable to set exact rate with %uHz clock frequency\n",
freq);
max9867->sysclk = freq;
value = value << MAX9867_PSCLK_SHIFT;
/* exact integer mode is not supported */
value &= ~MAX9867_FREQ_MASK;
regmap_update_bits(max9867->regmap, MAX9867_SYSCLK,
MAX9867_PSCLK_MASK, value);
return 0;
}
static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_component *component = codec_dai->component;
struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
u8 iface1A, iface1B;
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
max9867->master = true;
iface1A = MAX9867_MASTER;
iface1B = MAX9867_IFC1B_48X;
break;
case SND_SOC_DAIFMT_CBS_CFS:
max9867->master = false;
iface1A = iface1B = 0;
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
max9867->dsp_a = false;
iface1A |= MAX9867_I2S_DLY;
break;
case SND_SOC_DAIFMT_DSP_A:
max9867->dsp_a = true;
iface1A |= MAX9867_TDM_MODE | MAX9867_SDOUT_HIZ;
break;
default:
return -EINVAL;
}
/* Clock inversion bits, BCI and WCI */
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_IB_IF:
iface1A |= MAX9867_WCI_MODE | MAX9867_BCI_MODE;
break;
case SND_SOC_DAIFMT_IB_NF:
iface1A |= MAX9867_BCI_MODE;
break;
case SND_SOC_DAIFMT_NB_IF:
iface1A |= MAX9867_WCI_MODE;
break;
default:
return -EINVAL;
}
regmap_write(max9867->regmap, MAX9867_IFC1A, iface1A);
regmap_update_bits(max9867->regmap, MAX9867_IFC1B,
MAX9867_IFC1B_BCLK_MASK, iface1B);
return 0;
}
static const struct snd_soc_dai_ops max9867_dai_ops = {
.set_sysclk = max9867_set_dai_sysclk,
.set_fmt = max9867_dai_set_fmt,
.mute_stream = max9867_mute,
.startup = max9867_startup,
.hw_params = max9867_dai_hw_params,
.no_capture_mute = 1,
};
static struct snd_soc_dai_driver max9867_dai[] = {
{
.name = "max9867-aif1",
.playback = {
.stream_name = "HiFi Playback",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_48000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.capture = {
.stream_name = "HiFi Capture",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_48000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &max9867_dai_ops,
.symmetric_rates = 1,
}
};
#ifdef CONFIG_PM
static int max9867_suspend(struct snd_soc_component *component)
{
snd_soc_component_force_bias_level(component, SND_SOC_BIAS_OFF);
return 0;
}
static int max9867_resume(struct snd_soc_component *component)
{
snd_soc_component_force_bias_level(component, SND_SOC_BIAS_STANDBY);
return 0;
}
#else
#define max9867_suspend NULL
#define max9867_resume NULL
#endif
static int max9867_set_bias_level(struct snd_soc_component *component,
enum snd_soc_bias_level level)
{
int err;
struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
switch (level) {
case SND_SOC_BIAS_STANDBY:
if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
err = regcache_sync(max9867->regmap);
if (err)
return err;
err = regmap_write(max9867->regmap,
MAX9867_PWRMAN, 0xff);
if (err)
return err;
}
break;
case SND_SOC_BIAS_OFF:
err = regmap_write(max9867->regmap, MAX9867_PWRMAN, 0);
if (err)
return err;
regcache_mark_dirty(max9867->regmap);
break;
default:
break;
}
return 0;
}
static const struct snd_soc_component_driver max9867_component = {
.controls = max9867_snd_controls,
.num_controls = ARRAY_SIZE(max9867_snd_controls),
.dapm_routes = max9867_audio_map,
.num_dapm_routes = ARRAY_SIZE(max9867_audio_map),
.dapm_widgets = max9867_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(max9867_dapm_widgets),
.suspend = max9867_suspend,
.resume = max9867_resume,
.set_bias_level = max9867_set_bias_level,
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
.non_legacy_dai_naming = 1,
};
static bool max9867_volatile_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case MAX9867_STATUS:
case MAX9867_JACKSTATUS:
case MAX9867_AUXHIGH:
case MAX9867_AUXLOW:
return true;
default:
return false;
}
}
static const struct regmap_config max9867_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = MAX9867_REVISION,
.volatile_reg = max9867_volatile_register,
.cache_type = REGCACHE_RBTREE,
};
static int max9867_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct max9867_priv *max9867;
int ret, reg;
max9867 = devm_kzalloc(&i2c->dev, sizeof(*max9867), GFP_KERNEL);
if (!max9867)
return -ENOMEM;
i2c_set_clientdata(i2c, max9867);
max9867->regmap = devm_regmap_init_i2c(i2c, &max9867_regmap);
if (IS_ERR(max9867->regmap)) {
ret = PTR_ERR(max9867->regmap);
dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret);
return ret;
}
ret = regmap_read(max9867->regmap, MAX9867_REVISION, &reg);
if (ret < 0) {
dev_err(&i2c->dev, "Failed to read: %d\n", ret);
return ret;
}
dev_info(&i2c->dev, "device revision: %x\n", reg);
ret = devm_snd_soc_register_component(&i2c->dev, &max9867_component,
max9867_dai, ARRAY_SIZE(max9867_dai));
if (ret < 0)
dev_err(&i2c->dev, "Failed to register component: %d\n", ret);
return ret;
}
static const struct i2c_device_id max9867_i2c_id[] = {
{ "max9867", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, max9867_i2c_id);
static const struct of_device_id max9867_of_match[] = {
{ .compatible = "maxim,max9867", },
{ }
};
MODULE_DEVICE_TABLE(of, max9867_of_match);
static struct i2c_driver max9867_i2c_driver = {
.driver = {
.name = "max9867",
.of_match_table = of_match_ptr(max9867_of_match),
},
.probe = max9867_i2c_probe,
.id_table = max9867_i2c_id,
};
module_i2c_driver(max9867_i2c_driver);
MODULE_AUTHOR("Ladislav Michl <ladis@linux-mips.org>");
MODULE_DESCRIPTION("ASoC MAX9867 driver");
MODULE_LICENSE("GPL");
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