diff options
Diffstat (limited to 'sound/soc/codecs/max98373.c')
| -rw-r--r-- | sound/soc/codecs/max98373.c | 454 |
1 files changed, 454 insertions, 0 deletions
diff --git a/sound/soc/codecs/max98373.c b/sound/soc/codecs/max98373.c new file mode 100644 index 000000000..1fd4dbbb4 --- /dev/null +++ b/sound/soc/codecs/max98373.c @@ -0,0 +1,454 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2017, Maxim Integrated + +#include <linux/acpi.h> +#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 <linux/gpio.h> +#include <linux/of.h> +#include <linux/of_gpio.h> +#include <sound/tlv.h> +#include "max98373.h" + +static int max98373_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 max98373_priv *max98373 = snd_soc_component_get_drvdata(component); + + switch (event) { + case SND_SOC_DAPM_POST_PMU: + regmap_update_bits(max98373->regmap, + MAX98373_R20FF_GLOBAL_SHDN, + MAX98373_GLOBAL_EN_MASK, 1); + usleep_range(30000, 31000); + break; + case SND_SOC_DAPM_POST_PMD: + regmap_update_bits(max98373->regmap, + MAX98373_R20FF_GLOBAL_SHDN, + MAX98373_GLOBAL_EN_MASK, 0); + usleep_range(30000, 31000); + max98373->tdm_mode = false; + break; + default: + return 0; + } + return 0; +} + +static const char * const max98373_switch_text[] = { + "Left", "Right", "LeftRight"}; + +static const struct soc_enum dai_sel_enum = + SOC_ENUM_SINGLE(MAX98373_R2029_PCM_TO_SPK_MONO_MIX_1, + MAX98373_PCM_TO_SPK_MONOMIX_CFG_SHIFT, + 3, max98373_switch_text); + +static const struct snd_kcontrol_new max98373_dai_controls = + SOC_DAPM_ENUM("DAI Sel", dai_sel_enum); + +static const struct snd_kcontrol_new max98373_vi_control = + SOC_DAPM_SINGLE("Switch", MAX98373_R202C_PCM_TX_EN, 0, 1, 0); + +static const struct snd_kcontrol_new max98373_spkfb_control = + SOC_DAPM_SINGLE("Switch", MAX98373_R2043_AMP_EN, 1, 1, 0); + +static const struct snd_soc_dapm_widget max98373_dapm_widgets[] = { +SND_SOC_DAPM_DAC_E("Amp Enable", "HiFi Playback", + MAX98373_R202B_PCM_RX_EN, 0, 0, max98373_dac_event, + SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD), +SND_SOC_DAPM_MUX("DAI Sel Mux", SND_SOC_NOPM, 0, 0, + &max98373_dai_controls), +SND_SOC_DAPM_OUTPUT("BE_OUT"), +SND_SOC_DAPM_AIF_OUT("Voltage Sense", "HiFi Capture", 0, + MAX98373_R2047_IV_SENSE_ADC_EN, 0, 0), +SND_SOC_DAPM_AIF_OUT("Current Sense", "HiFi Capture", 0, + MAX98373_R2047_IV_SENSE_ADC_EN, 1, 0), +SND_SOC_DAPM_AIF_OUT("Speaker FB Sense", "HiFi Capture", 0, + SND_SOC_NOPM, 0, 0), +SND_SOC_DAPM_SWITCH("VI Sense", SND_SOC_NOPM, 0, 0, + &max98373_vi_control), +SND_SOC_DAPM_SWITCH("SpkFB Sense", SND_SOC_NOPM, 0, 0, + &max98373_spkfb_control), +SND_SOC_DAPM_SIGGEN("VMON"), +SND_SOC_DAPM_SIGGEN("IMON"), +SND_SOC_DAPM_SIGGEN("FBMON"), +}; + +static DECLARE_TLV_DB_SCALE(max98373_digital_tlv, -6350, 50, 1); +static const DECLARE_TLV_DB_RANGE(max98373_spk_tlv, + 0, 8, TLV_DB_SCALE_ITEM(0, 50, 0), + 9, 10, TLV_DB_SCALE_ITEM(500, 100, 0), +); +static const DECLARE_TLV_DB_RANGE(max98373_spkgain_max_tlv, + 0, 9, TLV_DB_SCALE_ITEM(800, 100, 0), +); +static const DECLARE_TLV_DB_RANGE(max98373_dht_step_size_tlv, + 0, 1, TLV_DB_SCALE_ITEM(25, 25, 0), + 2, 4, TLV_DB_SCALE_ITEM(100, 100, 0), +); +static const DECLARE_TLV_DB_RANGE(max98373_dht_spkgain_min_tlv, + 0, 9, TLV_DB_SCALE_ITEM(800, 100, 0), +); +static const DECLARE_TLV_DB_RANGE(max98373_dht_rotation_point_tlv, + 0, 1, TLV_DB_SCALE_ITEM(-3000, 500, 0), + 2, 4, TLV_DB_SCALE_ITEM(-2200, 200, 0), + 5, 6, TLV_DB_SCALE_ITEM(-1500, 300, 0), + 7, 9, TLV_DB_SCALE_ITEM(-1000, 200, 0), + 10, 13, TLV_DB_SCALE_ITEM(-500, 100, 0), + 14, 15, TLV_DB_SCALE_ITEM(-100, 50, 0), +); +static const DECLARE_TLV_DB_RANGE(max98373_limiter_thresh_tlv, + 0, 15, TLV_DB_SCALE_ITEM(-1500, 100, 0), +); + +static const DECLARE_TLV_DB_RANGE(max98373_bde_gain_tlv, + 0, 60, TLV_DB_SCALE_ITEM(-1500, 25, 0), +); + +static const char * const max98373_output_voltage_lvl_text[] = { + "5.43V", "6.09V", "6.83V", "7.67V", "8.60V", + "9.65V", "10.83V", "12.15V", "13.63V", "15.29V" +}; + +static SOC_ENUM_SINGLE_DECL(max98373_out_volt_enum, + MAX98373_R203E_AMP_PATH_GAIN, 0, + max98373_output_voltage_lvl_text); + +static const char * const max98373_dht_attack_rate_text[] = { + "17.5us", "35us", "70us", "140us", + "280us", "560us", "1120us", "2240us" +}; + +static SOC_ENUM_SINGLE_DECL(max98373_dht_attack_rate_enum, + MAX98373_R20D2_DHT_ATTACK_CFG, 0, + max98373_dht_attack_rate_text); + +static const char * const max98373_dht_release_rate_text[] = { + "45ms", "225ms", "450ms", "1150ms", + "2250ms", "3100ms", "4500ms", "6750ms" +}; + +static SOC_ENUM_SINGLE_DECL(max98373_dht_release_rate_enum, + MAX98373_R20D3_DHT_RELEASE_CFG, 0, + max98373_dht_release_rate_text); + +static const char * const max98373_limiter_attack_rate_text[] = { + "10us", "20us", "40us", "80us", + "160us", "320us", "640us", "1.28ms", + "2.56ms", "5.12ms", "10.24ms", "20.48ms", + "40.96ms", "81.92ms", "16.384ms", "32.768ms" +}; + +static SOC_ENUM_SINGLE_DECL(max98373_limiter_attack_rate_enum, + MAX98373_R20E1_LIMITER_ATK_REL_RATES, 4, + max98373_limiter_attack_rate_text); + +static const char * const max98373_limiter_release_rate_text[] = { + "40us", "80us", "160us", "320us", + "640us", "1.28ms", "2.56ms", "5.120ms", + "10.24ms", "20.48ms", "40.96ms", "81.92ms", + "163.84ms", "327.68ms", "655.36ms", "1310.72ms" +}; + +static SOC_ENUM_SINGLE_DECL(max98373_limiter_release_rate_enum, + MAX98373_R20E1_LIMITER_ATK_REL_RATES, 0, + max98373_limiter_release_rate_text); + +static const char * const max98373_ADC_samplerate_text[] = { + "333kHz", "192kHz", "64kHz", "48kHz" +}; + +static SOC_ENUM_SINGLE_DECL(max98373_adc_samplerate_enum, + MAX98373_R2051_MEAS_ADC_SAMPLING_RATE, 0, + max98373_ADC_samplerate_text); + +static const struct snd_kcontrol_new max98373_snd_controls[] = { +SOC_SINGLE("Digital Vol Sel Switch", MAX98373_R203F_AMP_DSP_CFG, + MAX98373_AMP_VOL_SEL_SHIFT, 1, 0), +SOC_SINGLE("Volume Location Switch", MAX98373_R203F_AMP_DSP_CFG, + MAX98373_AMP_VOL_SEL_SHIFT, 1, 0), +SOC_SINGLE("Ramp Up Switch", MAX98373_R203F_AMP_DSP_CFG, + MAX98373_AMP_DSP_CFG_RMP_UP_SHIFT, 1, 0), +SOC_SINGLE("Ramp Down Switch", MAX98373_R203F_AMP_DSP_CFG, + MAX98373_AMP_DSP_CFG_RMP_DN_SHIFT, 1, 0), +SOC_SINGLE("CLK Monitor Switch", MAX98373_R20FE_DEVICE_AUTO_RESTART_CFG, + MAX98373_CLOCK_MON_SHIFT, 1, 0), +SOC_SINGLE("Dither Switch", MAX98373_R203F_AMP_DSP_CFG, + MAX98373_AMP_DSP_CFG_DITH_SHIFT, 1, 0), +SOC_SINGLE("DC Blocker Switch", MAX98373_R203F_AMP_DSP_CFG, + MAX98373_AMP_DSP_CFG_DCBLK_SHIFT, 1, 0), +SOC_SINGLE_TLV("Digital Volume", MAX98373_R203D_AMP_DIG_VOL_CTRL, + 0, 0x7F, 1, max98373_digital_tlv), +SOC_SINGLE_TLV("Speaker Volume", MAX98373_R203E_AMP_PATH_GAIN, + MAX98373_SPK_DIGI_GAIN_SHIFT, 10, 0, max98373_spk_tlv), +SOC_SINGLE_TLV("FS Max Volume", MAX98373_R203E_AMP_PATH_GAIN, + MAX98373_FS_GAIN_MAX_SHIFT, 9, 0, max98373_spkgain_max_tlv), +SOC_ENUM("Output Voltage", max98373_out_volt_enum), +/* Dynamic Headroom Tracking */ +SOC_SINGLE("DHT Switch", MAX98373_R20D4_DHT_EN, + MAX98373_DHT_EN_SHIFT, 1, 0), +SOC_SINGLE_TLV("DHT Min Volume", MAX98373_R20D1_DHT_CFG, + MAX98373_DHT_SPK_GAIN_MIN_SHIFT, 9, 0, max98373_dht_spkgain_min_tlv), +SOC_SINGLE_TLV("DHT Rot Pnt Volume", MAX98373_R20D1_DHT_CFG, + MAX98373_DHT_ROT_PNT_SHIFT, 15, 1, max98373_dht_rotation_point_tlv), +SOC_SINGLE_TLV("DHT Attack Step Volume", MAX98373_R20D2_DHT_ATTACK_CFG, + MAX98373_DHT_ATTACK_STEP_SHIFT, 4, 0, max98373_dht_step_size_tlv), +SOC_SINGLE_TLV("DHT Release Step Volume", MAX98373_R20D3_DHT_RELEASE_CFG, + MAX98373_DHT_RELEASE_STEP_SHIFT, 4, 0, max98373_dht_step_size_tlv), +SOC_ENUM("DHT Attack Rate", max98373_dht_attack_rate_enum), +SOC_ENUM("DHT Release Rate", max98373_dht_release_rate_enum), +/* ADC configuration */ +SOC_SINGLE("ADC PVDD CH Switch", MAX98373_R2056_MEAS_ADC_PVDD_CH_EN, 0, 1, 0), +SOC_SINGLE("ADC PVDD FLT Switch", MAX98373_R2052_MEAS_ADC_PVDD_FLT_CFG, + MAX98373_FLT_EN_SHIFT, 1, 0), +SOC_SINGLE("ADC TEMP FLT Switch", MAX98373_R2053_MEAS_ADC_THERM_FLT_CFG, + MAX98373_FLT_EN_SHIFT, 1, 0), +SOC_SINGLE("ADC PVDD", MAX98373_R2054_MEAS_ADC_PVDD_CH_READBACK, 0, 0xFF, 0), +SOC_SINGLE("ADC TEMP", MAX98373_R2055_MEAS_ADC_THERM_CH_READBACK, 0, 0xFF, 0), +SOC_SINGLE("ADC PVDD FLT Coeff", MAX98373_R2052_MEAS_ADC_PVDD_FLT_CFG, + 0, 0x3, 0), +SOC_SINGLE("ADC TEMP FLT Coeff", MAX98373_R2053_MEAS_ADC_THERM_FLT_CFG, + 0, 0x3, 0), +SOC_ENUM("ADC SampleRate", max98373_adc_samplerate_enum), +/* Brownout Detection Engine */ +SOC_SINGLE("BDE Switch", MAX98373_R20B5_BDE_EN, MAX98373_BDE_EN_SHIFT, 1, 0), +SOC_SINGLE("BDE LVL4 Mute Switch", MAX98373_R20B2_BDE_L4_CFG_2, + MAX98373_LVL4_MUTE_EN_SHIFT, 1, 0), +SOC_SINGLE("BDE LVL4 Hold Switch", MAX98373_R20B2_BDE_L4_CFG_2, + MAX98373_LVL4_HOLD_EN_SHIFT, 1, 0), +SOC_SINGLE("BDE LVL1 Thresh", MAX98373_R2097_BDE_L1_THRESH, 0, 0xFF, 0), +SOC_SINGLE("BDE LVL2 Thresh", MAX98373_R2098_BDE_L2_THRESH, 0, 0xFF, 0), +SOC_SINGLE("BDE LVL3 Thresh", MAX98373_R2099_BDE_L3_THRESH, 0, 0xFF, 0), +SOC_SINGLE("BDE LVL4 Thresh", MAX98373_R209A_BDE_L4_THRESH, 0, 0xFF, 0), +SOC_SINGLE("BDE Active Level", MAX98373_R20B6_BDE_CUR_STATE_READBACK, 0, 8, 0), +SOC_SINGLE("BDE Clip Mode Switch", MAX98373_R2092_BDE_CLIPPER_MODE, 0, 1, 0), +SOC_SINGLE("BDE Thresh Hysteresis", MAX98373_R209B_BDE_THRESH_HYST, 0, 0xFF, 0), +SOC_SINGLE("BDE Hold Time", MAX98373_R2090_BDE_LVL_HOLD, 0, 0xFF, 0), +SOC_SINGLE("BDE Attack Rate", MAX98373_R2091_BDE_GAIN_ATK_REL_RATE, 4, 0xF, 0), +SOC_SINGLE("BDE Release Rate", MAX98373_R2091_BDE_GAIN_ATK_REL_RATE, 0, 0xF, 0), +SOC_SINGLE_TLV("BDE LVL1 Clip Thresh Volume", MAX98373_R20A9_BDE_L1_CFG_2, + 0, 0x3C, 1, max98373_bde_gain_tlv), +SOC_SINGLE_TLV("BDE LVL2 Clip Thresh Volume", MAX98373_R20AC_BDE_L2_CFG_2, + 0, 0x3C, 1, max98373_bde_gain_tlv), +SOC_SINGLE_TLV("BDE LVL3 Clip Thresh Volume", MAX98373_R20AF_BDE_L3_CFG_2, + 0, 0x3C, 1, max98373_bde_gain_tlv), +SOC_SINGLE_TLV("BDE LVL4 Clip Thresh Volume", MAX98373_R20B2_BDE_L4_CFG_2, + 0, 0x3C, 1, max98373_bde_gain_tlv), +SOC_SINGLE_TLV("BDE LVL1 Clip Reduction Volume", MAX98373_R20AA_BDE_L1_CFG_3, + 0, 0x3C, 1, max98373_bde_gain_tlv), +SOC_SINGLE_TLV("BDE LVL2 Clip Reduction Volume", MAX98373_R20AD_BDE_L2_CFG_3, + 0, 0x3C, 1, max98373_bde_gain_tlv), +SOC_SINGLE_TLV("BDE LVL3 Clip Reduction Volume", MAX98373_R20B0_BDE_L3_CFG_3, + 0, 0x3C, 1, max98373_bde_gain_tlv), +SOC_SINGLE_TLV("BDE LVL4 Clip Reduction Volume", MAX98373_R20B3_BDE_L4_CFG_3, + 0, 0x3C, 1, max98373_bde_gain_tlv), +SOC_SINGLE_TLV("BDE LVL1 Limiter Thresh Volume", MAX98373_R20A8_BDE_L1_CFG_1, + 0, 0xF, 1, max98373_limiter_thresh_tlv), +SOC_SINGLE_TLV("BDE LVL2 Limiter Thresh Volume", MAX98373_R20AB_BDE_L2_CFG_1, + 0, 0xF, 1, max98373_limiter_thresh_tlv), +SOC_SINGLE_TLV("BDE LVL3 Limiter Thresh Volume", MAX98373_R20AE_BDE_L3_CFG_1, + 0, 0xF, 1, max98373_limiter_thresh_tlv), +SOC_SINGLE_TLV("BDE LVL4 Limiter Thresh Volume", MAX98373_R20B1_BDE_L4_CFG_1, + 0, 0xF, 1, max98373_limiter_thresh_tlv), +/* Limiter */ +SOC_SINGLE("Limiter Switch", MAX98373_R20E2_LIMITER_EN, + MAX98373_LIMITER_EN_SHIFT, 1, 0), +SOC_SINGLE("Limiter Src Switch", MAX98373_R20E0_LIMITER_THRESH_CFG, + MAX98373_LIMITER_THRESH_SRC_SHIFT, 1, 0), +SOC_SINGLE_TLV("Limiter Thresh Volume", MAX98373_R20E0_LIMITER_THRESH_CFG, + MAX98373_LIMITER_THRESH_SHIFT, 15, 0, max98373_limiter_thresh_tlv), +SOC_ENUM("Limiter Attack Rate", max98373_limiter_attack_rate_enum), +SOC_ENUM("Limiter Release Rate", max98373_limiter_release_rate_enum), +}; + +static const struct snd_soc_dapm_route max98373_audio_map[] = { + /* Plabyack */ + {"DAI Sel Mux", "Left", "Amp Enable"}, + {"DAI Sel Mux", "Right", "Amp Enable"}, + {"DAI Sel Mux", "LeftRight", "Amp Enable"}, + {"BE_OUT", NULL, "DAI Sel Mux"}, + /* Capture */ + { "VI Sense", "Switch", "VMON" }, + { "VI Sense", "Switch", "IMON" }, + { "SpkFB Sense", "Switch", "FBMON" }, + { "Voltage Sense", NULL, "VI Sense" }, + { "Current Sense", NULL, "VI Sense" }, + { "Speaker FB Sense", NULL, "SpkFB Sense" }, +}; + +void max98373_reset(struct max98373_priv *max98373, struct device *dev) +{ + int ret, reg, count; + + /* Software Reset */ + ret = regmap_update_bits(max98373->regmap, + MAX98373_R2000_SW_RESET, + MAX98373_SOFT_RESET, + MAX98373_SOFT_RESET); + if (ret) + dev_err(dev, "Reset command failed. (ret:%d)\n", ret); + + count = 0; + while (count < 3) { + usleep_range(10000, 11000); + /* Software Reset Verification */ + ret = regmap_read(max98373->regmap, + MAX98373_R21FF_REV_ID, ®); + if (!ret) { + dev_info(dev, "Reset completed (retry:%d)\n", count); + return; + } + count++; + } + dev_err(dev, "Reset failed. (ret:%d)\n", ret); +} +EXPORT_SYMBOL_GPL(max98373_reset); + +static int max98373_probe(struct snd_soc_component *component) +{ + struct max98373_priv *max98373 = snd_soc_component_get_drvdata(component); + + /* Software Reset */ + max98373_reset(max98373, component->dev); + + /* IV default slot configuration */ + regmap_write(max98373->regmap, + MAX98373_R2020_PCM_TX_HIZ_EN_1, + 0xFF); + regmap_write(max98373->regmap, + MAX98373_R2021_PCM_TX_HIZ_EN_2, + 0xFF); + /* L/R mix configuration */ + regmap_write(max98373->regmap, + MAX98373_R2029_PCM_TO_SPK_MONO_MIX_1, + 0x80); + regmap_write(max98373->regmap, + MAX98373_R202A_PCM_TO_SPK_MONO_MIX_2, + 0x1); + /* Enable DC blocker */ + regmap_write(max98373->regmap, + MAX98373_R203F_AMP_DSP_CFG, + 0x3); + /* Enable IMON VMON DC blocker */ + regmap_write(max98373->regmap, + MAX98373_R2046_IV_SENSE_ADC_DSP_CFG, + 0x7); + /* voltage, current slot configuration */ + regmap_write(max98373->regmap, + MAX98373_R2022_PCM_TX_SRC_1, + (max98373->i_slot << MAX98373_PCM_TX_CH_SRC_A_I_SHIFT | + max98373->v_slot) & 0xFF); + if (max98373->v_slot < 8) + regmap_update_bits(max98373->regmap, + MAX98373_R2020_PCM_TX_HIZ_EN_1, + 1 << max98373->v_slot, 0); + else + regmap_update_bits(max98373->regmap, + MAX98373_R2021_PCM_TX_HIZ_EN_2, + 1 << (max98373->v_slot - 8), 0); + + if (max98373->i_slot < 8) + regmap_update_bits(max98373->regmap, + MAX98373_R2020_PCM_TX_HIZ_EN_1, + 1 << max98373->i_slot, 0); + else + regmap_update_bits(max98373->regmap, + MAX98373_R2021_PCM_TX_HIZ_EN_2, + 1 << (max98373->i_slot - 8), 0); + + /* speaker feedback slot configuration */ + regmap_write(max98373->regmap, + MAX98373_R2023_PCM_TX_SRC_2, + max98373->spkfb_slot & 0xFF); + + /* Set interleave mode */ + if (max98373->interleave_mode) + regmap_update_bits(max98373->regmap, + MAX98373_R2024_PCM_DATA_FMT_CFG, + MAX98373_PCM_TX_CH_INTERLEAVE_MASK, + MAX98373_PCM_TX_CH_INTERLEAVE_MASK); + + /* Speaker enable */ + regmap_update_bits(max98373->regmap, + MAX98373_R2043_AMP_EN, + MAX98373_SPK_EN_MASK, 1); + + return 0; +} + +const struct snd_soc_component_driver soc_codec_dev_max98373 = { + .probe = max98373_probe, + .controls = max98373_snd_controls, + .num_controls = ARRAY_SIZE(max98373_snd_controls), + .dapm_widgets = max98373_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(max98373_dapm_widgets), + .dapm_routes = max98373_audio_map, + .num_dapm_routes = ARRAY_SIZE(max98373_audio_map), + .use_pmdown_time = 1, + .endianness = 1, + .non_legacy_dai_naming = 1, +}; +EXPORT_SYMBOL_GPL(soc_codec_dev_max98373); + +const struct snd_soc_component_driver soc_codec_dev_max98373_sdw = { + .probe = NULL, + .controls = max98373_snd_controls, + .num_controls = ARRAY_SIZE(max98373_snd_controls), + .dapm_widgets = max98373_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(max98373_dapm_widgets), + .dapm_routes = max98373_audio_map, + .num_dapm_routes = ARRAY_SIZE(max98373_audio_map), + .use_pmdown_time = 1, + .endianness = 1, + .non_legacy_dai_naming = 1, +}; +EXPORT_SYMBOL_GPL(soc_codec_dev_max98373_sdw); + +void max98373_slot_config(struct device *dev, + struct max98373_priv *max98373) +{ + int value; + + if (!device_property_read_u32(dev, "maxim,vmon-slot-no", &value)) + max98373->v_slot = value & 0xF; + else + max98373->v_slot = 0; + + if (!device_property_read_u32(dev, "maxim,imon-slot-no", &value)) + max98373->i_slot = value & 0xF; + else + max98373->i_slot = 1; + if (dev->of_node) { + max98373->reset_gpio = of_get_named_gpio(dev->of_node, + "maxim,reset-gpio", 0); + if (!gpio_is_valid(max98373->reset_gpio)) { + dev_err(dev, "Looking up %s property in node %s failed %d\n", + "maxim,reset-gpio", dev->of_node->full_name, + max98373->reset_gpio); + } else { + dev_dbg(dev, "maxim,reset-gpio=%d", + max98373->reset_gpio); + } + } else { + /* this makes reset_gpio as invalid */ + max98373->reset_gpio = -1; + } + + if (!device_property_read_u32(dev, "maxim,spkfb-slot-no", &value)) + max98373->spkfb_slot = value & 0xF; + else + max98373->spkfb_slot = 2; +} +EXPORT_SYMBOL_GPL(max98373_slot_config); + +MODULE_DESCRIPTION("ALSA SoC MAX98373 driver"); +MODULE_AUTHOR("Ryan Lee <ryans.lee@maximintegrated.com>"); +MODULE_LICENSE("GPL"); |