1 files changed, 96 insertions, 0 deletions
diff --git a/sound/soc/codecs/ak4554.c b/sound/soc/codecs/ak4554.c
new file mode 100644
index 000000000..b9607de5a
--- /dev/null
+++ b/sound/soc/codecs/ak4554.c
@@ -0,0 +1,96 @@
+// 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>");