/* * CS4271 ASoC codec driver * * Copyright (c) 2010 Alexander Sverdlin * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * 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. * * This driver support CS4271 codec being master or slave, working * in control port mode, connected either via SPI or I2C. * The data format accepted is I2S or left-justified. * DAPM support not implemented. */ #include #include #include #include #include #include #include #include #include #include #include #include "cs4271.h" #define CS4271_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \ SNDRV_PCM_FMTBIT_S24_LE | \ SNDRV_PCM_FMTBIT_S32_LE) #define CS4271_PCM_RATES SNDRV_PCM_RATE_8000_192000 /* * CS4271 registers */ #define CS4271_MODE1 0x01 /* Mode Control 1 */ #define CS4271_DACCTL 0x02 /* DAC Control */ #define CS4271_DACVOL 0x03 /* DAC Volume & Mixing Control */ #define CS4271_VOLA 0x04 /* DAC Channel A Volume Control */ #define CS4271_VOLB 0x05 /* DAC Channel B Volume Control */ #define CS4271_ADCCTL 0x06 /* ADC Control */ #define CS4271_MODE2 0x07 /* Mode Control 2 */ #define CS4271_CHIPID 0x08 /* Chip ID */ #define CS4271_FIRSTREG CS4271_MODE1 #define CS4271_LASTREG CS4271_MODE2 #define CS4271_NR_REGS ((CS4271_LASTREG & 0xFF) + 1) /* Bit masks for the CS4271 registers */ #define CS4271_MODE1_MODE_MASK 0xC0 #define CS4271_MODE1_MODE_1X 0x00 #define CS4271_MODE1_MODE_2X 0x80 #define CS4271_MODE1_MODE_4X 0xC0 #define CS4271_MODE1_DIV_MASK 0x30 #define CS4271_MODE1_DIV_1 0x00 #define CS4271_MODE1_DIV_15 0x10 #define CS4271_MODE1_DIV_2 0x20 #define CS4271_MODE1_DIV_3 0x30 #define CS4271_MODE1_MASTER 0x08 #define CS4271_MODE1_DAC_DIF_MASK 0x07 #define CS4271_MODE1_DAC_DIF_LJ 0x00 #define CS4271_MODE1_DAC_DIF_I2S 0x01 #define CS4271_MODE1_DAC_DIF_RJ16 0x02 #define CS4271_MODE1_DAC_DIF_RJ24 0x03 #define CS4271_MODE1_DAC_DIF_RJ20 0x04 #define CS4271_MODE1_DAC_DIF_RJ18 0x05 #define CS4271_DACCTL_AMUTE 0x80 #define CS4271_DACCTL_IF_SLOW 0x40 #define CS4271_DACCTL_DEM_MASK 0x30 #define CS4271_DACCTL_DEM_DIS 0x00 #define CS4271_DACCTL_DEM_441 0x10 #define CS4271_DACCTL_DEM_48 0x20 #define CS4271_DACCTL_DEM_32 0x30 #define CS4271_DACCTL_SVRU 0x08 #define CS4271_DACCTL_SRD 0x04 #define CS4271_DACCTL_INVA 0x02 #define CS4271_DACCTL_INVB 0x01 #define CS4271_DACVOL_BEQUA 0x40 #define CS4271_DACVOL_SOFT 0x20 #define CS4271_DACVOL_ZEROC 0x10 #define CS4271_DACVOL_ATAPI_MASK 0x0F #define CS4271_DACVOL_ATAPI_M_M 0x00 #define CS4271_DACVOL_ATAPI_M_BR 0x01 #define CS4271_DACVOL_ATAPI_M_BL 0x02 #define CS4271_DACVOL_ATAPI_M_BLR2 0x03 #define CS4271_DACVOL_ATAPI_AR_M 0x04 #define CS4271_DACVOL_ATAPI_AR_BR 0x05 #define CS4271_DACVOL_ATAPI_AR_BL 0x06 #define CS4271_DACVOL_ATAPI_AR_BLR2 0x07 #define CS4271_DACVOL_ATAPI_AL_M 0x08 #define CS4271_DACVOL_ATAPI_AL_BR 0x09 #define CS4271_DACVOL_ATAPI_AL_BL 0x0A #define CS4271_DACVOL_ATAPI_AL_BLR2 0x0B #define CS4271_DACVOL_ATAPI_ALR2_M 0x0C #define CS4271_DACVOL_ATAPI_ALR2_BR 0x0D #define CS4271_DACVOL_ATAPI_ALR2_BL 0x0E #define CS4271_DACVOL_ATAPI_ALR2_BLR2 0x0F #define CS4271_VOLA_MUTE 0x80 #define CS4271_VOLA_VOL_MASK 0x7F #define CS4271_VOLB_MUTE 0x80 #define CS4271_VOLB_VOL_MASK 0x7F #define CS4271_ADCCTL_DITHER16 0x20 #define CS4271_ADCCTL_ADC_DIF_MASK 0x10 #define CS4271_ADCCTL_ADC_DIF_LJ 0x00 #define CS4271_ADCCTL_ADC_DIF_I2S 0x10 #define CS4271_ADCCTL_MUTEA 0x08 #define CS4271_ADCCTL_MUTEB 0x04 #define CS4271_ADCCTL_HPFDA 0x02 #define CS4271_ADCCTL_HPFDB 0x01 #define CS4271_MODE2_LOOP 0x10 #define CS4271_MODE2_MUTECAEQUB 0x08 #define CS4271_MODE2_FREEZE 0x04 #define CS4271_MODE2_CPEN 0x02 #define CS4271_MODE2_PDN 0x01 #define CS4271_CHIPID_PART_MASK 0xF0 #define CS4271_CHIPID_REV_MASK 0x0F /* * Default CS4271 power-up configuration * Array contains non-existing in hw register at address 0 * Array do not include Chip ID, as codec driver does not use * registers read operations at all */ static const struct reg_default cs4271_reg_defaults[] = { { CS4271_MODE1, 0, }, { CS4271_DACCTL, CS4271_DACCTL_AMUTE, }, { CS4271_DACVOL, CS4271_DACVOL_SOFT | CS4271_DACVOL_ATAPI_AL_BR, }, { CS4271_VOLA, 0, }, { CS4271_VOLB, 0, }, { CS4271_ADCCTL, 0, }, { CS4271_MODE2, 0, }, }; static bool cs4271_volatile_reg(struct device *dev, unsigned int reg) { return reg == CS4271_CHIPID; } struct cs4271_private { unsigned int mclk; bool master; bool deemph; struct regmap *regmap; /* Current sample rate for de-emphasis control */ int rate; /* GPIO driving Reset pin, if any */ int gpio_nreset; /* GPIO that disable serial bus, if any */ int gpio_disable; /* enable soft reset workaround */ bool enable_soft_reset; }; static const struct snd_soc_dapm_widget cs4271_dapm_widgets[] = { SND_SOC_DAPM_INPUT("AINA"), SND_SOC_DAPM_INPUT("AINB"), SND_SOC_DAPM_OUTPUT("AOUTA+"), SND_SOC_DAPM_OUTPUT("AOUTA-"), SND_SOC_DAPM_OUTPUT("AOUTB+"), SND_SOC_DAPM_OUTPUT("AOUTB-"), }; static const struct snd_soc_dapm_route cs4271_dapm_routes[] = { { "Capture", NULL, "AINA" }, { "Capture", NULL, "AINB" }, { "AOUTA+", NULL, "Playback" }, { "AOUTA-", NULL, "Playback" }, { "AOUTB+", NULL, "Playback" }, { "AOUTB-", NULL, "Playback" }, }; /* * @freq is the desired MCLK rate * MCLK rate should (c) be the sample rate, multiplied by one of the * ratios listed in cs4271_mclk_fs_ratios table */ static int cs4271_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 cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); cs4271->mclk = freq; return 0; } static int cs4271_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int format) { struct snd_soc_codec *codec = codec_dai->codec; struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); unsigned int val = 0; int ret; switch (format & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBS_CFS: cs4271->master = 0; break; case SND_SOC_DAIFMT_CBM_CFM: cs4271->master = 1; val |= CS4271_MODE1_MASTER; break; default: dev_err(codec->dev, "Invalid DAI format\n"); return -EINVAL; } switch (format & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_LEFT_J: val |= CS4271_MODE1_DAC_DIF_LJ; ret = regmap_update_bits(cs4271->regmap, CS4271_ADCCTL, CS4271_ADCCTL_ADC_DIF_MASK, CS4271_ADCCTL_ADC_DIF_LJ); if (ret < 0) return ret; break; case SND_SOC_DAIFMT_I2S: val |= CS4271_MODE1_DAC_DIF_I2S; ret = regmap_update_bits(cs4271->regmap, CS4271_ADCCTL, CS4271_ADCCTL_ADC_DIF_MASK, CS4271_ADCCTL_ADC_DIF_I2S); if (ret < 0) return ret; break; default: dev_err(codec->dev, "Invalid DAI format\n"); return -EINVAL; } ret = regmap_update_bits(cs4271->regmap, CS4271_MODE1, CS4271_MODE1_DAC_DIF_MASK | CS4271_MODE1_MASTER, val); if (ret < 0) return ret; return 0; } static int cs4271_deemph[] = {0, 44100, 48000, 32000}; static int cs4271_set_deemph(struct snd_soc_codec *codec) { struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); int i, ret; int val = CS4271_DACCTL_DEM_DIS; if (cs4271->deemph) { /* Find closest de-emphasis freq */ val = 1; for (i = 2; i < ARRAY_SIZE(cs4271_deemph); i++) if (abs(cs4271_deemph[i] - cs4271->rate) < abs(cs4271_deemph[val] - cs4271->rate)) val = i; val <<= 4; } ret = regmap_update_bits(cs4271->regmap, CS4271_DACCTL, CS4271_DACCTL_DEM_MASK, val); if (ret < 0) return ret; return 0; } static int cs4271_get_deemph(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); ucontrol->value.enumerated.item[0] = cs4271->deemph; return 0; } static int cs4271_put_deemph(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); cs4271->deemph = ucontrol->value.enumerated.item[0]; return cs4271_set_deemph(codec); } struct cs4271_clk_cfg { bool master; /* codec mode */ u8 speed_mode; /* codec speed mode: 1x, 2x, 4x */ unsigned short ratio; /* MCLK / sample rate */ u8 ratio_mask; /* ratio bit mask for Master mode */ }; static struct cs4271_clk_cfg cs4271_clk_tab[] = { {1, CS4271_MODE1_MODE_1X, 256, CS4271_MODE1_DIV_1}, {1, CS4271_MODE1_MODE_1X, 384, CS4271_MODE1_DIV_15}, {1, CS4271_MODE1_MODE_1X, 512, CS4271_MODE1_DIV_2}, {1, CS4271_MODE1_MODE_1X, 768, CS4271_MODE1_DIV_3}, {1, CS4271_MODE1_MODE_2X, 128, CS4271_MODE1_DIV_1}, {1, CS4271_MODE1_MODE_2X, 192, CS4271_MODE1_DIV_15}, {1, CS4271_MODE1_MODE_2X, 256, CS4271_MODE1_DIV_2}, {1, CS4271_MODE1_MODE_2X, 384, CS4271_MODE1_DIV_3}, {1, CS4271_MODE1_MODE_4X, 64, CS4271_MODE1_DIV_1}, {1, CS4271_MODE1_MODE_4X, 96, CS4271_MODE1_DIV_15}, {1, CS4271_MODE1_MODE_4X, 128, CS4271_MODE1_DIV_2}, {1, CS4271_MODE1_MODE_4X, 192, CS4271_MODE1_DIV_3}, {0, CS4271_MODE1_MODE_1X, 256, CS4271_MODE1_DIV_1}, {0, CS4271_MODE1_MODE_1X, 384, CS4271_MODE1_DIV_1}, {0, CS4271_MODE1_MODE_1X, 512, CS4271_MODE1_DIV_1}, {0, CS4271_MODE1_MODE_1X, 768, CS4271_MODE1_DIV_2}, {0, CS4271_MODE1_MODE_1X, 1024, CS4271_MODE1_DIV_2}, {0, CS4271_MODE1_MODE_2X, 128, CS4271_MODE1_DIV_1}, {0, CS4271_MODE1_MODE_2X, 192, CS4271_MODE1_DIV_1}, {0, CS4271_MODE1_MODE_2X, 256, CS4271_MODE1_DIV_1}, {0, CS4271_MODE1_MODE_2X, 384, CS4271_MODE1_DIV_2}, {0, CS4271_MODE1_MODE_2X, 512, CS4271_MODE1_DIV_2}, {0, CS4271_MODE1_MODE_4X, 64, CS4271_MODE1_DIV_1}, {0, CS4271_MODE1_MODE_4X, 96, CS4271_MODE1_DIV_1}, {0, CS4271_MODE1_MODE_4X, 128, CS4271_MODE1_DIV_1}, {0, CS4271_MODE1_MODE_4X, 192, CS4271_MODE1_DIV_2}, {0, CS4271_MODE1_MODE_4X, 256, CS4271_MODE1_DIV_2}, }; #define CS4171_NR_RATIOS ARRAY_SIZE(cs4271_clk_tab) static int cs4271_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 cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); int i, ret; unsigned int ratio, val; if (cs4271->enable_soft_reset) { /* * Put the codec in soft reset and back again in case it's not * currently streaming data. This way of bringing the codec in * sync to the current clocks is not explicitly documented in * the data sheet, but it seems to work fine, and in contrast * to a read hardware reset, we don't have to sync back all * registers every time. */ if ((substream->stream == SNDRV_PCM_STREAM_PLAYBACK && !dai->capture_active) || (substream->stream == SNDRV_PCM_STREAM_CAPTURE && !dai->playback_active)) { ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2, CS4271_MODE2_PDN, CS4271_MODE2_PDN); if (ret < 0) return ret; ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2, CS4271_MODE2_PDN, 0); if (ret < 0) return ret; } } cs4271->rate = params_rate(params); /* Configure DAC */ if (cs4271->rate < 50000) val = CS4271_MODE1_MODE_1X; else if (cs4271->rate < 100000) val = CS4271_MODE1_MODE_2X; else val = CS4271_MODE1_MODE_4X; ratio = cs4271->mclk / cs4271->rate; for (i = 0; i < CS4171_NR_RATIOS; i++) if ((cs4271_clk_tab[i].master == cs4271->master) && (cs4271_clk_tab[i].speed_mode == val) && (cs4271_clk_tab[i].ratio == ratio)) break; if (i == CS4171_NR_RATIOS) { dev_err(codec->dev, "Invalid sample rate\n"); return -EINVAL; } val |= cs4271_clk_tab[i].ratio_mask; ret = regmap_update_bits(cs4271->regmap, CS4271_MODE1, CS4271_MODE1_MODE_MASK | CS4271_MODE1_DIV_MASK, val); if (ret < 0) return ret; return cs4271_set_deemph(codec); } static int cs4271_mute_stream(struct snd_soc_dai *dai, int mute, int stream) { struct snd_soc_codec *codec = dai->codec; struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); int ret; int val_a = 0; int val_b = 0; if (stream != SNDRV_PCM_STREAM_PLAYBACK) return 0; if (mute) { val_a = CS4271_VOLA_MUTE; val_b = CS4271_VOLB_MUTE; } ret = regmap_update_bits(cs4271->regmap, CS4271_VOLA, CS4271_VOLA_MUTE, val_a); if (ret < 0) return ret; ret = regmap_update_bits(cs4271->regmap, CS4271_VOLB, CS4271_VOLB_MUTE, val_b); if (ret < 0) return ret; return 0; } /* CS4271 controls */ static DECLARE_TLV_DB_SCALE(cs4271_dac_tlv, -12700, 100, 0); static const struct snd_kcontrol_new cs4271_snd_controls[] = { SOC_DOUBLE_R_TLV("Master Playback Volume", CS4271_VOLA, CS4271_VOLB, 0, 0x7F, 1, cs4271_dac_tlv), SOC_SINGLE("Digital Loopback Switch", CS4271_MODE2, 4, 1, 0), SOC_SINGLE("Soft Ramp Switch", CS4271_DACVOL, 5, 1, 0), SOC_SINGLE("Zero Cross Switch", CS4271_DACVOL, 4, 1, 0), SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0, cs4271_get_deemph, cs4271_put_deemph), SOC_SINGLE("Auto-Mute Switch", CS4271_DACCTL, 7, 1, 0), SOC_SINGLE("Slow Roll Off Filter Switch", CS4271_DACCTL, 6, 1, 0), SOC_SINGLE("Soft Volume Ramp-Up Switch", CS4271_DACCTL, 3, 1, 0), SOC_SINGLE("Soft Ramp-Down Switch", CS4271_DACCTL, 2, 1, 0), SOC_SINGLE("Left Channel Inversion Switch", CS4271_DACCTL, 1, 1, 0), SOC_SINGLE("Right Channel Inversion Switch", CS4271_DACCTL, 0, 1, 0), SOC_DOUBLE("Master Capture Switch", CS4271_ADCCTL, 3, 2, 1, 1), SOC_SINGLE("Dither 16-Bit Data Switch", CS4271_ADCCTL, 5, 1, 0), SOC_DOUBLE("High Pass Filter Switch", CS4271_ADCCTL, 1, 0, 1, 1), SOC_DOUBLE_R("Master Playback Switch", CS4271_VOLA, CS4271_VOLB, 7, 1, 1), }; static const struct snd_soc_dai_ops cs4271_dai_ops = { .hw_params = cs4271_hw_params, .set_sysclk = cs4271_set_dai_sysclk, .set_fmt = cs4271_set_dai_fmt, .mute_stream = cs4271_mute_stream, }; static struct snd_soc_dai_driver cs4271_dai = { .name = "cs4271-hifi", .playback = { .stream_name = "Playback", .channels_min = 2, .channels_max = 2, .rates = CS4271_PCM_RATES, .formats = CS4271_PCM_FORMATS, }, .capture = { .stream_name = "Capture", .channels_min = 2, .channels_max = 2, .rates = CS4271_PCM_RATES, .formats = CS4271_PCM_FORMATS, }, .ops = &cs4271_dai_ops, .symmetric_rates = 1, }; #ifdef CONFIG_PM static int cs4271_soc_suspend(struct snd_soc_codec *codec) { int ret; struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); /* Set power-down bit */ ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2, CS4271_MODE2_PDN, CS4271_MODE2_PDN); if (ret < 0) return ret; return 0; } static int cs4271_soc_resume(struct snd_soc_codec *codec) { int ret; struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); /* Restore codec state */ ret = regcache_sync(cs4271->regmap); if (ret < 0) return ret; /* then disable the power-down bit */ ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2, CS4271_MODE2_PDN, 0); if (ret < 0) return ret; return 0; } #else #define cs4271_soc_suspend NULL #define cs4271_soc_resume NULL #endif /* CONFIG_PM */ #ifdef CONFIG_OF const struct of_device_id cs4271_dt_ids[] = { { .compatible = "cirrus,cs4271", }, { } }; MODULE_DEVICE_TABLE(of, cs4271_dt_ids); EXPORT_SYMBOL_GPL(cs4271_dt_ids); #endif static int cs4271_codec_probe(struct snd_soc_codec *codec) { struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); struct cs4271_platform_data *cs4271plat = codec->dev->platform_data; int ret; bool amutec_eq_bmutec = false; #ifdef CONFIG_OF if (of_match_device(cs4271_dt_ids, codec->dev)) { if (of_get_property(codec->dev->of_node, "cirrus,amutec-eq-bmutec", NULL)) amutec_eq_bmutec = true; if (of_get_property(codec->dev->of_node, "cirrus,enable-soft-reset", NULL)) cs4271->enable_soft_reset = true; } #endif if (cs4271plat) { amutec_eq_bmutec = cs4271plat->amutec_eq_bmutec; cs4271->enable_soft_reset = cs4271plat->enable_soft_reset; } if (gpio_is_valid(cs4271->gpio_nreset)) { /* Reset codec */ gpio_direction_output(cs4271->gpio_nreset, 0); mdelay(1); gpio_set_value(cs4271->gpio_nreset, 1); /* Give the codec time to wake up */ mdelay(1); } ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2, CS4271_MODE2_PDN | CS4271_MODE2_CPEN, CS4271_MODE2_PDN | CS4271_MODE2_CPEN); if (ret < 0) return ret; ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2, CS4271_MODE2_PDN, 0); if (ret < 0) return ret; /* Power-up sequence requires 85 uS */ udelay(85); if (amutec_eq_bmutec) regmap_update_bits(cs4271->regmap, CS4271_MODE2, CS4271_MODE2_MUTECAEQUB, CS4271_MODE2_MUTECAEQUB); return 0; } static int cs4271_codec_remove(struct snd_soc_codec *codec) { struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); if (gpio_is_valid(cs4271->gpio_nreset)) /* Set codec to the reset state */ gpio_set_value(cs4271->gpio_nreset, 0); return 0; }; static struct snd_soc_codec_driver soc_codec_dev_cs4271 = { .probe = cs4271_codec_probe, .remove = cs4271_codec_remove, .suspend = cs4271_soc_suspend, .resume = cs4271_soc_resume, .controls = cs4271_snd_controls, .num_controls = ARRAY_SIZE(cs4271_snd_controls), .dapm_widgets = cs4271_dapm_widgets, .num_dapm_widgets = ARRAY_SIZE(cs4271_dapm_widgets), .dapm_routes = cs4271_dapm_routes, .num_dapm_routes = ARRAY_SIZE(cs4271_dapm_routes), }; static int cs4271_common_probe(struct device *dev, struct cs4271_private **c) { struct cs4271_platform_data *cs4271plat = dev->platform_data; struct cs4271_private *cs4271; cs4271 = devm_kzalloc(dev, sizeof(*cs4271), GFP_KERNEL); if (!cs4271) return -ENOMEM; if (of_match_device(cs4271_dt_ids, dev)) cs4271->gpio_nreset = of_get_named_gpio(dev->of_node, "reset-gpio", 0); if (cs4271plat) cs4271->gpio_nreset = cs4271plat->gpio_nreset; if (gpio_is_valid(cs4271->gpio_nreset)) { int ret; ret = devm_gpio_request(dev, cs4271->gpio_nreset, "CS4271 Reset"); if (ret < 0) return ret; } *c = cs4271; return 0; } const struct regmap_config cs4271_regmap_config = { .max_register = CS4271_LASTREG, .reg_defaults = cs4271_reg_defaults, .num_reg_defaults = ARRAY_SIZE(cs4271_reg_defaults), .cache_type = REGCACHE_RBTREE, .volatile_reg = cs4271_volatile_reg, }; EXPORT_SYMBOL_GPL(cs4271_regmap_config); int cs4271_probe(struct device *dev, struct regmap *regmap) { struct cs4271_private *cs4271; int ret; if (IS_ERR(regmap)) return PTR_ERR(regmap); ret = cs4271_common_probe(dev, &cs4271); if (ret < 0) return ret; dev_set_drvdata(dev, cs4271); cs4271->regmap = regmap; return snd_soc_register_codec(dev, &soc_codec_dev_cs4271, &cs4271_dai, 1); } EXPORT_SYMBOL_GPL(cs4271_probe); MODULE_AUTHOR("Alexander Sverdlin "); MODULE_DESCRIPTION("Cirrus Logic CS4271 ALSA SoC Codec Driver"); MODULE_LICENSE("GPL");