// SPDX-License-Identifier: GPL-2.0
// ak4554.c
//
// Copyright (C) 2013 Renesas Solutions Corp.
// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

#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_rate = 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,
};

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 v2");
MODULE_DESCRIPTION("SoC AK4554 driver");
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");