text: /*
   * ak4554.c
   *
   * Copyright (C) 2013 Renesas Solutions Corp.
   * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   *
   * 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/module.h>
  #include <sound/soc.h>
  
  /*
   * ak4554 is very simple DA/AD converter which has no setting register.
   *
   * CAUTION
   *
   * ak4554 playback format is SND_SOC_DAIFMT_RIGHT_J,
   * and,   capture  format is SND_SOC_DAIFMT_LEFT_J
   * on same bit clock, LR clock.
   * But, this driver doesn't have snd_soc_dai_ops :: set_fmt
   *
   * CPU/Codec DAI image
   *
   * CPU-DAI1 (plaback only fmt = RIGHT_J) --+-- ak4554
   *					   |
   * CPU-DAI2 (capture only fmt = LEFT_J) ---+
   */
  
  static const struct snd_soc_dapm_widget ak4554_dapm_widgets[] = {
  SND_SOC_DAPM_INPUT("AINL"),
  SND_SOC_DAPM_INPUT("AINR"),
  
  SND_SOC_DAPM_OUTPUT("AOUTL"),
  SND_SOC_DAPM_OUTPUT("AOUTR"),
  };
  
  static const struct snd_soc_dapm_route ak4554_dapm_routes[] = {
  	{ "Capture", NULL, "AINL" },
  	{ "Capture", NULL, "AINR" },
  
  	{ "AOUTL", NULL, "Playback" },
  	{ "AOUTR", NULL, "Playback" },
  };
  
  static struct snd_soc_dai_driver ak4554_dai = {
  	.name = "ak4554-hifi",
  	.playback = {
  		.stream_name = "Playback",
  		.channels_min = 2,
  		.channels_max = 2,
  		.rates = SNDRV_PCM_RATE_8000_48000,
  		.formats = SNDRV_PCM_FMTBIT_S16_LE,
  	},
  	.capture = {
  		.stream_name = "Capture",
  		.channels_min = 2,
  		.channels_max = 2,
  		.rates = SNDRV_PCM_RATE_8000_48000,
  		.formats = SNDRV_PCM_FMTBIT_S16_LE,
  	},
  	.symmetric_rates = 1,
  };
  
  static const struct snd_soc_component_driver soc_component_dev_ak4554 = {
  	.dapm_widgets		= ak4554_dapm_widgets,
  	.num_dapm_widgets	= ARRAY_SIZE(ak4554_dapm_widgets),
  	.dapm_routes		= ak4554_dapm_routes,
  	.num_dapm_routes	= ARRAY_SIZE(ak4554_dapm_routes),
  	.idle_bias_on		= 1,
  	.use_pmdown_time	= 1,
  	.endianness		= 1,
  	.non_legacy_dai_naming	= 1,
  };
  
  static int ak4554_soc_probe(struct platform_device *pdev)
  {
  	return devm_snd_soc_register_component(&pdev->dev,
  				      &soc_component_dev_ak4554,
  				      &ak4554_dai, 1);
  }
  
  static const struct of_device_id ak4554_of_match[] = {
  	{ .compatible = "asahi-kasei,ak4554" },
  	{},
  };
  MODULE_DEVICE_TABLE(of, ak4554_of_match);
  
  static struct platform_driver ak4554_driver = {
  	.driver = {
  		.name = "ak4554-adc-dac",
  		.of_match_table = ak4554_of_match,
  	},
  	.probe	= ak4554_soc_probe,
  };
  module_platform_driver(ak4554_driver);
  
  MODULE_LICENSE("GPL");
  MODULE_DESCRIPTION("SoC AK4554 driver");
  MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
  