diff options
Diffstat (limited to 'sound/soc/codecs/max98926.c')
| -rw-r--r-- | sound/soc/codecs/max98926.c | 606 |
1 files changed, 606 insertions, 0 deletions
diff --git a/sound/soc/codecs/max98926.c b/sound/soc/codecs/max98926.c new file mode 100644 index 000000000000..8d14adae5cc5 --- /dev/null +++ b/sound/soc/codecs/max98926.c @@ -0,0 +1,606 @@ +/* + * max98926.c -- ALSA SoC MAX98926 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 "max98926.h" + +static const char * const max98926_boost_voltage_txt[] = { + "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 const char * const max98926_boost_current_txt[] = { + "0.6", "0.8", "1.0", "1.2", "1.4", "1.6", "1.8", "2.0", + "2.2", "2.4", "2.6", "2.8", "3.2", "3.6", "4.0", "4.4" +}; + +static const char *const max98926_dai_txt[] = { + "Left", "Right", "LeftRight", "LeftRightDiv2", +}; + +static const char *const max98926_pdm_ch_text[] = { + "Current", "Voltage", +}; + +static const char *const max98926_hpf_cutoff_txt[] = { + "Disable", "DC Block", "100Hz", + "200Hz", "400Hz", "800Hz", +}; + +static const struct reg_default max98926_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, 0x04 }, /* DAI Clock Mode 1 */ + { 0x1B, 0x00 }, /* 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 max98926_voltage_enum[] = { + SOC_ENUM_SINGLE(MAX98926_DAI_CLK_DIV_N_LSBS, 0, + ARRAY_SIZE(max98926_pdm_ch_text), + max98926_pdm_ch_text), +}; + +static const struct snd_kcontrol_new max98926_voltage_control = + SOC_DAPM_ENUM("Route", max98926_voltage_enum); + +static const struct soc_enum max98926_current_enum[] = { + SOC_ENUM_SINGLE(MAX98926_DAI_CLK_DIV_N_LSBS, + MAX98926_PDM_SOURCE_1_SHIFT, + ARRAY_SIZE(max98926_pdm_ch_text), + max98926_pdm_ch_text), +}; + +static const struct snd_kcontrol_new max98926_current_control = + SOC_DAPM_ENUM("Route", max98926_current_enum); + +static const struct snd_kcontrol_new max98926_mixer_controls[] = { + SOC_DAPM_SINGLE("PCM Single Switch", MAX98926_SPK_AMP, + MAX98926_INSELECT_MODE_SHIFT, 0, 0), + SOC_DAPM_SINGLE("PDM Single Switch", MAX98926_SPK_AMP, + MAX98926_INSELECT_MODE_SHIFT, 1, 0), +}; + +static const struct snd_kcontrol_new max98926_dai_controls[] = { + SOC_DAPM_SINGLE("Left", MAX98926_GAIN, + MAX98926_DAC_IN_SEL_SHIFT, 0, 0), + SOC_DAPM_SINGLE("Right", MAX98926_GAIN, + MAX98926_DAC_IN_SEL_SHIFT, 1, 0), + SOC_DAPM_SINGLE("LeftRight", MAX98926_GAIN, + MAX98926_DAC_IN_SEL_SHIFT, 2, 0), + SOC_DAPM_SINGLE("(Left+Right)/2 Switch", MAX98926_GAIN, + MAX98926_DAC_IN_SEL_SHIFT, 3, 0), +}; + +static const struct snd_soc_dapm_widget max98926_dapm_widgets[] = { + SND_SOC_DAPM_AIF_IN("DAI_OUT", "HiFi Playback", 0, + SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_DAC("Amp Enable", NULL, MAX98926_BLOCK_ENABLE, + MAX98926_SPK_EN_SHIFT, 0), + SND_SOC_DAPM_SUPPLY("Global Enable", MAX98926_GLOBAL_ENABLE, + MAX98926_EN_SHIFT, 0, NULL, 0), + SND_SOC_DAPM_SUPPLY("VI Enable", MAX98926_BLOCK_ENABLE, + MAX98926_ADC_IMON_EN_WIDTH | + MAX98926_ADC_VMON_EN_SHIFT, + 0, NULL, 0), + SND_SOC_DAPM_PGA("BST Enable", MAX98926_BLOCK_ENABLE, + MAX98926_BST_EN_SHIFT, 0, NULL, 0), + SND_SOC_DAPM_OUTPUT("BE_OUT"), + SND_SOC_DAPM_MIXER("PCM Sel", MAX98926_SPK_AMP, + MAX98926_INSELECT_MODE_SHIFT, 0, + &max98926_mixer_controls[0], + ARRAY_SIZE(max98926_mixer_controls)), + SND_SOC_DAPM_MIXER("DAI Sel", + MAX98926_GAIN, MAX98926_DAC_IN_SEL_SHIFT, 0, + &max98926_dai_controls[0], + ARRAY_SIZE(max98926_dai_controls)), + SND_SOC_DAPM_MUX("PDM CH1 Source", + MAX98926_DAI_CLK_DIV_N_LSBS, + MAX98926_PDM_CURRENT_SHIFT, + 0, &max98926_current_control), + SND_SOC_DAPM_MUX("PDM CH0 Source", + MAX98926_DAI_CLK_DIV_N_LSBS, + MAX98926_PDM_VOLTAGE_SHIFT, + 0, &max98926_voltage_control), +}; + +static const struct snd_soc_dapm_route max98926_audio_map[] = { + {"VI Enable", NULL, "DAI_OUT"}, + {"DAI Sel", "Left", "VI Enable"}, + {"DAI Sel", "Right", "VI Enable"}, + {"DAI Sel", "LeftRight", "VI Enable"}, + {"DAI Sel", "LeftRightDiv2", "VI Enable"}, + {"PCM Sel", "PCM", "DAI Sel"}, + + {"PDM CH1 Source", "Current", "DAI_OUT"}, + {"PDM CH1 Source", "Voltage", "DAI_OUT"}, + {"PDM CH0 Source", "Current", "DAI_OUT"}, + {"PDM CH0 Source", "Voltage", "DAI_OUT"}, + {"PCM Sel", "Analog", "PDM CH1 Source"}, + {"PCM Sel", "Analog", "PDM CH0 Source"}, + {"Amp Enable", NULL, "PCM Sel"}, + + {"BST Enable", NULL, "Amp Enable"}, + {"BE_OUT", NULL, "BST Enable"}, +}; + +static bool max98926_volatile_register(struct device *dev, unsigned int reg) +{ + switch (reg) { + case MAX98926_VBAT_DATA: + case MAX98926_VBST_DATA: + case MAX98926_LIVE_STATUS0: + case MAX98926_LIVE_STATUS1: + case MAX98926_LIVE_STATUS2: + case MAX98926_STATE0: + case MAX98926_STATE1: + case MAX98926_STATE2: + case MAX98926_FLAG0: + case MAX98926_FLAG1: + case MAX98926_FLAG2: + case MAX98926_VERSION: + return true; + default: + return false; + } +} + +static bool max98926_readable_register(struct device *dev, unsigned int reg) +{ + switch (reg) { + case MAX98926_IRQ_CLEAR0: + case MAX98926_IRQ_CLEAR1: + case MAX98926_IRQ_CLEAR2: + case MAX98926_ALC_HOLD_RLS: + return false; + default: + return true; + } +}; + +DECLARE_TLV_DB_SCALE(max98926_spk_tlv, -600, 100, 0); +DECLARE_TLV_DB_RANGE(max98926_current_tlv, + 0, 11, TLV_DB_SCALE_ITEM(20, 20, 0), + 12, 15, TLV_DB_SCALE_ITEM(320, 40, 0), +); + +static SOC_ENUM_SINGLE_DECL(max98926_dac_hpf_cutoff, + MAX98926_FILTERS, MAX98926_DAC_HPF_SHIFT, + max98926_hpf_cutoff_txt); + +static SOC_ENUM_SINGLE_DECL(max98926_boost_voltage, + MAX98926_CONFIGURATION, MAX98926_BST_VOUT_SHIFT, + max98926_boost_voltage_txt); + +static const struct snd_kcontrol_new max98926_snd_controls[] = { + SOC_SINGLE_TLV("Speaker Volume", MAX98926_GAIN, + MAX98926_SPK_GAIN_SHIFT, + (1<<MAX98926_SPK_GAIN_WIDTH)-1, 0, + max98926_spk_tlv), + SOC_SINGLE("Ramp Switch", MAX98926_GAIN_RAMPING, + MAX98926_SPK_RMP_EN_SHIFT, 1, 0), + SOC_SINGLE("ZCD Switch", MAX98926_GAIN_RAMPING, + MAX98926_SPK_ZCD_EN_SHIFT, 1, 0), + SOC_SINGLE("ALC Switch", MAX98926_THRESHOLD, + MAX98926_ALC_EN_SHIFT, 1, 0), + SOC_SINGLE("ALC Threshold", MAX98926_THRESHOLD, + MAX98926_ALC_TH_SHIFT, + (1<<MAX98926_ALC_TH_WIDTH)-1, 0), + SOC_ENUM("Boost Output Voltage", max98926_boost_voltage), + SOC_SINGLE_TLV("Boost Current Limit", MAX98926_BOOST_LIMITER, + MAX98926_BST_ILIM_SHIFT, + (1<<MAX98926_BST_ILIM_SHIFT)-1, 0, + max98926_current_tlv), + SOC_ENUM("DAC HPF Cutoff", max98926_dac_hpf_cutoff), + SOC_DOUBLE("PDM Channel One", MAX98926_DAI_CLK_DIV_N_LSBS, + MAX98926_PDM_CHANNEL_1_SHIFT, + MAX98926_PDM_CHANNEL_1_HIZ, 1, 0), + SOC_DOUBLE("PDM Channel Zero", MAX98926_DAI_CLK_DIV_N_LSBS, + MAX98926_PDM_CHANNEL_0_SHIFT, + MAX98926_PDM_CHANNEL_0_HIZ, 1, 0), +}; + +static const struct { + int rate; + int sr; +} rate_table[] = { + { + .rate = 8000, + .sr = 0, + }, + { + .rate = 11025, + .sr = 1, + }, + { + .rate = 12000, + .sr = 2, + }, + { + .rate = 16000, + .sr = 3, + }, + { + .rate = 22050, + .sr = 4, + }, + { + .rate = 24000, + .sr = 5, + }, + { + .rate = 32000, + .sr = 6, + }, + { + .rate = 44100, + .sr = 7, + }, + { + .rate = 48000, + .sr = 8, + }, +}; + +static void max98926_set_sense_data(struct max98926_priv *max98926) +{ + regmap_update_bits(max98926->regmap, + MAX98926_DOUT_CFG_VMON, + MAX98926_DAI_VMON_EN_MASK, + MAX98926_DAI_VMON_EN_MASK); + regmap_update_bits(max98926->regmap, + MAX98926_DOUT_CFG_IMON, + MAX98926_DAI_IMON_EN_MASK, + MAX98926_DAI_IMON_EN_MASK); + + if (!max98926->interleave_mode) { + /* set VMON slots */ + regmap_update_bits(max98926->regmap, + MAX98926_DOUT_CFG_VMON, + MAX98926_DAI_VMON_SLOT_MASK, + max98926->v_slot); + /* set IMON slots */ + regmap_update_bits(max98926->regmap, + MAX98926_DOUT_CFG_IMON, + MAX98926_DAI_IMON_SLOT_MASK, + max98926->i_slot); + } else { + /* enable interleave mode */ + regmap_update_bits(max98926->regmap, + MAX98926_FORMAT, + MAX98926_DAI_INTERLEAVE_MASK, + MAX98926_DAI_INTERLEAVE_MASK); + /* set interleave slots */ + regmap_update_bits(max98926->regmap, + MAX98926_DOUT_CFG_VBAT, + MAX98926_DAI_INTERLEAVE_SLOT_MASK, + max98926->v_slot); + } +} + +static int max98926_dai_set_fmt(struct snd_soc_dai *codec_dai, + unsigned int fmt) +{ + struct snd_soc_codec *codec = codec_dai->codec; + struct max98926_priv *max98926 = 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: + max98926_set_sense_data(max98926); + break; + 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 = MAX98926_DAI_WCI_MASK; + break; + case SND_SOC_DAIFMT_IB_NF: + invert = MAX98926_DAI_BCI_MASK; + break; + case SND_SOC_DAIFMT_IB_IF: + invert = MAX98926_DAI_BCI_MASK | MAX98926_DAI_WCI_MASK; + break; + default: + dev_err(codec->dev, "DAI invert mode unsupported"); + return -EINVAL; + } + + regmap_write(max98926->regmap, + MAX98926_FORMAT, MAX98926_DAI_DLY_MASK); + regmap_update_bits(max98926->regmap, MAX98926_FORMAT, + MAX98926_DAI_BCI_MASK, invert); + return 0; +} + +static int max98926_dai_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + int dai_sr = -EINVAL; + int rate = params_rate(params), i; + struct snd_soc_codec *codec = dai->codec; + struct max98926_priv *max98926 = snd_soc_codec_get_drvdata(codec); + int blr_clk_ratio; + + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_S16_LE: + regmap_update_bits(max98926->regmap, + MAX98926_FORMAT, + MAX98926_DAI_CHANSZ_MASK, + MAX98926_DAI_CHANSZ_16); + max98926->ch_size = 16; + break; + case SNDRV_PCM_FORMAT_S24_LE: + regmap_update_bits(max98926->regmap, + MAX98926_FORMAT, + MAX98926_DAI_CHANSZ_MASK, + MAX98926_DAI_CHANSZ_24); + max98926->ch_size = 24; + break; + case SNDRV_PCM_FORMAT_S32_LE: + regmap_update_bits(max98926->regmap, + MAX98926_FORMAT, + MAX98926_DAI_CHANSZ_MASK, + MAX98926_DAI_CHANSZ_32); + max98926->ch_size = 32; + break; + default: + dev_dbg(codec->dev, "format unsupported %d", + params_format(params)); + return -EINVAL; + } + + /* BCLK/LRCLK ratio calculation */ + blr_clk_ratio = params_channels(params) * max98926->ch_size; + + switch (blr_clk_ratio) { + case 32: + regmap_update_bits(max98926->regmap, + MAX98926_DAI_CLK_MODE2, + MAX98926_DAI_BSEL_MASK, + MAX98926_DAI_BSEL_32); + break; + case 48: + regmap_update_bits(max98926->regmap, + MAX98926_DAI_CLK_MODE2, + MAX98926_DAI_BSEL_MASK, + MAX98926_DAI_BSEL_48); + break; + case 64: + regmap_update_bits(max98926->regmap, + MAX98926_DAI_CLK_MODE2, + MAX98926_DAI_BSEL_MASK, + MAX98926_DAI_BSEL_64); + break; + default: + return -EINVAL; + } + + /* find the closest rate */ + for (i = 0; i < ARRAY_SIZE(rate_table); i++) { + if (rate_table[i].rate >= rate) { + dai_sr = rate_table[i].sr; + break; + } + } + if (dai_sr < 0) + return -EINVAL; + + /* set DAI_SR to correct LRCLK frequency */ + regmap_update_bits(max98926->regmap, + MAX98926_DAI_CLK_MODE2, + MAX98926_DAI_SR_MASK, dai_sr << MAX98926_DAI_SR_SHIFT); + return 0; +} + +#define MAX98926_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \ + SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) + +static struct snd_soc_dai_ops max98926_dai_ops = { + .set_fmt = max98926_dai_set_fmt, + .hw_params = max98926_dai_hw_params, +}; + +static struct snd_soc_dai_driver max98926_dai[] = { +{ + .name = "max98926-aif1", + .playback = { + .stream_name = "HiFi Playback", + .channels_min = 1, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_8000_48000, + .formats = MAX98926_FORMATS, + }, + .capture = { + .stream_name = "HiFi Capture", + .channels_min = 1, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_8000_48000, + .formats = MAX98926_FORMATS, + }, + .ops = &max98926_dai_ops, +} +}; + +static int max98926_probe(struct snd_soc_codec *codec) +{ + struct max98926_priv *max98926 = snd_soc_codec_get_drvdata(codec); + + max98926->codec = codec; + codec->control_data = max98926->regmap; + /* Hi-Z all the slots */ + regmap_write(max98926->regmap, MAX98926_DOUT_HIZ_CFG4, 0xF0); + return 0; +} + +static struct snd_soc_codec_driver soc_codec_dev_max98926 = { + .probe = max98926_probe, + .controls = max98926_snd_controls, + .num_controls = ARRAY_SIZE(max98926_snd_controls), + .dapm_routes = max98926_audio_map, + .num_dapm_routes = ARRAY_SIZE(max98926_audio_map), + .dapm_widgets = max98926_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(max98926_dapm_widgets), +}; + +static const struct regmap_config max98926_regmap = { + .reg_bits = 8, + .val_bits = 8, + .max_register = MAX98926_VERSION, + .reg_defaults = max98926_reg, + .num_reg_defaults = ARRAY_SIZE(max98926_reg), + .volatile_reg = max98926_volatile_register, + .readable_reg = max98926_readable_register, + .cache_type = REGCACHE_RBTREE, +}; + +static int max98926_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + int ret, reg; + u32 value; + struct max98926_priv *max98926; + + max98926 = devm_kzalloc(&i2c->dev, + sizeof(*max98926), GFP_KERNEL); + if (!max98926) + return -ENOMEM; + + i2c_set_clientdata(i2c, max98926); + max98926->regmap = devm_regmap_init_i2c(i2c, &max98926_regmap); + if (IS_ERR(max98926->regmap)) { + ret = PTR_ERR(max98926->regmap); + dev_err(&i2c->dev, + "Failed to allocate regmap: %d\n", ret); + goto err_out; + } + if (of_property_read_bool(i2c->dev.of_node, "interleave-mode")) + max98926->interleave_mode = true; + + if (!of_property_read_u32(i2c->dev.of_node, "vmon-slot-no", &value)) { + if (value > MAX98926_DAI_VMON_SLOT_1E_1F) { + dev_err(&i2c->dev, "vmon slot number is wrong:\n"); + return -EINVAL; + } + max98926->v_slot = value; + } + if (!of_property_read_u32(i2c->dev.of_node, "imon-slot-no", &value)) { + if (value > MAX98926_DAI_IMON_SLOT_1E_1F) { + dev_err(&i2c->dev, "imon slot number is wrong:\n"); + return -EINVAL; + } + max98926->i_slot = value; + } + ret = regmap_read(max98926->regmap, + MAX98926_VERSION, ®); + if (ret < 0) { + dev_err(&i2c->dev, "Failed to read: %x\n", reg); + return ret; + } + + ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_max98926, + max98926_dai, ARRAY_SIZE(max98926_dai)); + if (ret < 0) + dev_err(&i2c->dev, + "Failed to register codec: %d\n", ret); + dev_info(&i2c->dev, "device version: %x\n", reg); +err_out: + return ret; +} + +static int max98926_i2c_remove(struct i2c_client *client) +{ + snd_soc_unregister_codec(&client->dev); + return 0; +} + +static const struct i2c_device_id max98926_i2c_id[] = { + { "max98926", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, max98926_i2c_id); + +static const struct of_device_id max98926_of_match[] = { + { .compatible = "maxim,max98926", }, + { } +}; +MODULE_DEVICE_TABLE(of, max98926_of_match); + +static struct i2c_driver max98926_i2c_driver = { + .driver = { + .name = "max98926", + .of_match_table = of_match_ptr(max98926_of_match), + .pm = NULL, + }, + .probe = max98926_i2c_probe, + .remove = max98926_i2c_remove, + .id_table = max98926_i2c_id, +}; + +module_i2c_driver(max98926_i2c_driver) +MODULE_DESCRIPTION("ALSA SoC MAX98926 driver"); +MODULE_AUTHOR("Anish kumar <anish.kumar@maximintegrated.com>"); +MODULE_LICENSE("GPL"); |