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271 lines
6.7 KiB
271 lines
6.7 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// Audio driver for PCM1789 |
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// Copyright (C) 2018 Bootlin |
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// Mylène Josserand <[email protected]> |
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#include <linux/gpio/consumer.h> |
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#include <linux/module.h> |
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#include <linux/workqueue.h> |
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#include <sound/pcm_params.h> |
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#include <sound/soc.h> |
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#include <sound/tlv.h> |
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#include "pcm1789.h" |
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#define PCM1789_MUTE_CONTROL 0x10 |
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#define PCM1789_FMT_CONTROL 0x11 |
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#define PCM1789_SOFT_MUTE 0x14 |
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#define PCM1789_DAC_VOL_LEFT 0x18 |
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#define PCM1789_DAC_VOL_RIGHT 0x19 |
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#define PCM1789_FMT_MASK 0x07 |
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#define PCM1789_MUTE_MASK 0x03 |
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#define PCM1789_MUTE_SRET 0x06 |
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struct pcm1789_private { |
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struct regmap *regmap; |
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unsigned int format; |
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unsigned int rate; |
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struct gpio_desc *reset; |
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struct work_struct work; |
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struct device *dev; |
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}; |
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static const struct reg_default pcm1789_reg_defaults[] = { |
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{ PCM1789_FMT_CONTROL, 0x00 }, |
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{ PCM1789_SOFT_MUTE, 0x00 }, |
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{ PCM1789_DAC_VOL_LEFT, 0xff }, |
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{ PCM1789_DAC_VOL_RIGHT, 0xff }, |
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}; |
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static bool pcm1789_accessible_reg(struct device *dev, unsigned int reg) |
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{ |
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return reg >= PCM1789_MUTE_CONTROL && reg <= PCM1789_DAC_VOL_RIGHT; |
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} |
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static bool pcm1789_writeable_reg(struct device *dev, unsigned int reg) |
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{ |
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return pcm1789_accessible_reg(dev, reg); |
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} |
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static int pcm1789_set_dai_fmt(struct snd_soc_dai *codec_dai, |
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unsigned int format) |
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{ |
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struct snd_soc_component *component = codec_dai->component; |
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struct pcm1789_private *priv = snd_soc_component_get_drvdata(component); |
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priv->format = format; |
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return 0; |
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} |
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static int pcm1789_mute(struct snd_soc_dai *codec_dai, int mute, int direction) |
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{ |
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struct snd_soc_component *component = codec_dai->component; |
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struct pcm1789_private *priv = snd_soc_component_get_drvdata(component); |
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return regmap_update_bits(priv->regmap, PCM1789_SOFT_MUTE, |
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PCM1789_MUTE_MASK, |
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mute ? 0 : PCM1789_MUTE_MASK); |
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} |
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static int pcm1789_hw_params(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params, |
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struct snd_soc_dai *codec_dai) |
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{ |
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struct snd_soc_component *component = codec_dai->component; |
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struct pcm1789_private *priv = snd_soc_component_get_drvdata(component); |
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int val = 0, ret; |
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priv->rate = params_rate(params); |
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switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) { |
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case SND_SOC_DAIFMT_RIGHT_J: |
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switch (params_width(params)) { |
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case 24: |
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val = 2; |
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break; |
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case 16: |
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val = 3; |
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break; |
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default: |
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return -EINVAL; |
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} |
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break; |
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case SND_SOC_DAIFMT_I2S: |
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switch (params_width(params)) { |
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case 16: |
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case 24: |
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case 32: |
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val = 0; |
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break; |
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default: |
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return -EINVAL; |
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} |
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break; |
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case SND_SOC_DAIFMT_LEFT_J: |
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switch (params_width(params)) { |
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case 16: |
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case 24: |
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case 32: |
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val = 1; |
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break; |
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default: |
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return -EINVAL; |
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} |
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break; |
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default: |
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dev_err(component->dev, "Invalid DAI format\n"); |
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return -EINVAL; |
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} |
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ret = regmap_update_bits(priv->regmap, PCM1789_FMT_CONTROL, |
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PCM1789_FMT_MASK, val); |
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if (ret < 0) |
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return ret; |
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return 0; |
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} |
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static void pcm1789_work_queue(struct work_struct *work) |
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{ |
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struct pcm1789_private *priv = container_of(work, |
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struct pcm1789_private, |
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work); |
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/* Perform a software reset to remove codec from desynchronized state */ |
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if (regmap_update_bits(priv->regmap, PCM1789_MUTE_CONTROL, |
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0x3 << PCM1789_MUTE_SRET, 0) < 0) |
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dev_err(priv->dev, "Error while setting SRET"); |
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} |
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static int pcm1789_trigger(struct snd_pcm_substream *substream, int cmd, |
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struct snd_soc_dai *dai) |
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{ |
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struct snd_soc_component *component = dai->component; |
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struct pcm1789_private *priv = snd_soc_component_get_drvdata(component); |
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int ret = 0; |
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switch (cmd) { |
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case SNDRV_PCM_TRIGGER_START: |
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case SNDRV_PCM_TRIGGER_RESUME: |
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
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schedule_work(&priv->work); |
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break; |
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case SNDRV_PCM_TRIGGER_STOP: |
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case SNDRV_PCM_TRIGGER_SUSPEND: |
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
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break; |
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default: |
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ret = -EINVAL; |
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} |
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return ret; |
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} |
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static const struct snd_soc_dai_ops pcm1789_dai_ops = { |
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.set_fmt = pcm1789_set_dai_fmt, |
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.hw_params = pcm1789_hw_params, |
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.mute_stream = pcm1789_mute, |
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.trigger = pcm1789_trigger, |
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.no_capture_mute = 1, |
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}; |
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static const DECLARE_TLV_DB_SCALE(pcm1789_dac_tlv, -12000, 50, 1); |
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static const struct snd_kcontrol_new pcm1789_controls[] = { |
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SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM1789_DAC_VOL_LEFT, |
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PCM1789_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0, |
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pcm1789_dac_tlv), |
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}; |
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static const struct snd_soc_dapm_widget pcm1789_dapm_widgets[] = { |
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SND_SOC_DAPM_OUTPUT("IOUTL+"), |
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SND_SOC_DAPM_OUTPUT("IOUTL-"), |
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SND_SOC_DAPM_OUTPUT("IOUTR+"), |
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SND_SOC_DAPM_OUTPUT("IOUTR-"), |
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}; |
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static const struct snd_soc_dapm_route pcm1789_dapm_routes[] = { |
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{ "IOUTL+", NULL, "Playback" }, |
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{ "IOUTL-", NULL, "Playback" }, |
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{ "IOUTR+", NULL, "Playback" }, |
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{ "IOUTR-", NULL, "Playback" }, |
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}; |
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static struct snd_soc_dai_driver pcm1789_dai = { |
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.name = "pcm1789-hifi", |
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.playback = { |
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.stream_name = "Playback", |
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.channels_min = 2, |
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.channels_max = 2, |
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.rates = SNDRV_PCM_RATE_CONTINUOUS, |
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.rate_min = 10000, |
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.rate_max = 200000, |
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.formats = PCM1789_FORMATS, |
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}, |
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.ops = &pcm1789_dai_ops, |
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}; |
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const struct regmap_config pcm1789_regmap_config = { |
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.reg_bits = 8, |
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.val_bits = 8, |
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.max_register = PCM1789_DAC_VOL_RIGHT, |
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.reg_defaults = pcm1789_reg_defaults, |
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.num_reg_defaults = ARRAY_SIZE(pcm1789_reg_defaults), |
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.writeable_reg = pcm1789_writeable_reg, |
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.readable_reg = pcm1789_accessible_reg, |
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}; |
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EXPORT_SYMBOL_GPL(pcm1789_regmap_config); |
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static const struct snd_soc_component_driver soc_component_dev_pcm1789 = { |
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.controls = pcm1789_controls, |
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.num_controls = ARRAY_SIZE(pcm1789_controls), |
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.dapm_widgets = pcm1789_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(pcm1789_dapm_widgets), |
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.dapm_routes = pcm1789_dapm_routes, |
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.num_dapm_routes = ARRAY_SIZE(pcm1789_dapm_routes), |
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.idle_bias_on = 1, |
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.use_pmdown_time = 1, |
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.endianness = 1, |
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}; |
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int pcm1789_common_init(struct device *dev, struct regmap *regmap) |
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{ |
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struct pcm1789_private *pcm1789; |
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pcm1789 = devm_kzalloc(dev, sizeof(struct pcm1789_private), |
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GFP_KERNEL); |
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if (!pcm1789) |
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return -ENOMEM; |
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pcm1789->regmap = regmap; |
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pcm1789->dev = dev; |
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dev_set_drvdata(dev, pcm1789); |
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pcm1789->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); |
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if (IS_ERR(pcm1789->reset)) |
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return PTR_ERR(pcm1789->reset); |
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gpiod_set_value_cansleep(pcm1789->reset, 0); |
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msleep(300); |
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INIT_WORK(&pcm1789->work, pcm1789_work_queue); |
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return devm_snd_soc_register_component(dev, &soc_component_dev_pcm1789, |
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&pcm1789_dai, 1); |
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} |
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EXPORT_SYMBOL_GPL(pcm1789_common_init); |
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void pcm1789_common_exit(struct device *dev) |
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{ |
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struct pcm1789_private *priv = dev_get_drvdata(dev); |
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flush_work(&priv->work); |
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} |
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EXPORT_SYMBOL_GPL(pcm1789_common_exit); |
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MODULE_DESCRIPTION("ASoC PCM1789 driver"); |
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MODULE_AUTHOR("Mylène Josserand <[email protected]>"); |
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MODULE_LICENSE("GPL");
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