ASoC: airoha: Add machine driver for Airoha AN7581

Add support for the machine driver for Airoha AN7581 paired with the WM8960
i2c codec. This driver creates the sound card for the AFE driver.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Link: https://patch.msgid.link/20260908090448.3332-6-ansuelsmth@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/mediatek/Kconfig

@@ -16,6 +16,16 @@ config SND_SOC_AN7581
 	  Select Y if you have such device.
 	  If unsure select "N".
 
+config SND_SOC_AN7581_WM8960
+	tristate "ASoc Audio driver for Airoha AN7581 with WM8960 codec"
+	depends on SND_SOC_AN7581 && I2C
+	select SND_SOC_WM8960
+	help
+	  This adds support for ASoC machine driver for Airoha AN7581
+	  boards with the WM8960 codecs.
+	  Select Y if you have such device.
+	  If unsure select "N".
+
 endmenu
 
 menu "Mediatek"

sound/soc/mediatek/an7581/Makefile

@@ -6,3 +6,4 @@ snd-soc-an7581-afe-y := \
 	an7581-dai-etdm.o
 
 obj-$(CONFIG_SND_SOC_AN7581) += snd-soc-an7581-afe.o
+obj-$(CONFIG_SND_SOC_AN7581_WM8960) += an7581-wm8960.o

sound/soc/mediatek/an7581/an7581-wm8960.c

@@ -0,0 +1,161 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Airoha ALSA SoC I2S platform driver for AN7581
+ *
+ */
+
+#include <linux/module.h>
+#include <sound/soc.h>
+
+#include "an7581-afe-common.h"
+
+SND_SOC_DAILINK_DEFS(playback,
+		     DAILINK_COMP_ARRAY(COMP_CPU("DL1")),
+		     DAILINK_COMP_ARRAY(COMP_DUMMY()),
+		     DAILINK_COMP_ARRAY(COMP_EMPTY(), COMP_EMPTY()));
+
+SND_SOC_DAILINK_DEFS(capture,
+		     DAILINK_COMP_ARRAY(COMP_CPU("UL1")),
+		     DAILINK_COMP_ARRAY(COMP_DUMMY()),
+		     DAILINK_COMP_ARRAY(COMP_EMPTY(), COMP_EMPTY()));
+
+SND_SOC_DAILINK_DEFS(codec,
+		     DAILINK_COMP_ARRAY(COMP_CPU("ETDM")),
+		     DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8960-hifi")),
+		     DAILINK_COMP_ARRAY(COMP_EMPTY(), COMP_EMPTY()));
+
+static struct snd_soc_dai_link an7581_wm8960_dai_links[] = {
+	/* FE */
+	{
+		.name = "wm8960-playback",
+		.stream_name = "wm8960-playback",
+		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
+			    SND_SOC_DPCM_TRIGGER_POST},
+		.dynamic = 1,
+		.playback_only = 1,
+		SND_SOC_DAILINK_REG(playback),
+	},
+	{
+		.name = "wm8960-capture",
+		.stream_name = "wm8960-capture",
+		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
+			    SND_SOC_DPCM_TRIGGER_POST},
+		.dynamic = 1,
+		.capture_only = 1,
+		SND_SOC_DAILINK_REG(capture),
+	},
+	/* BE */
+	{
+		.name = "wm8960-codec",
+		.no_pcm = 1,
+		.dai_fmt = SND_SOC_DAIFMT_I2S |
+			SND_SOC_DAIFMT_NB_NF |
+			SND_SOC_DAIFMT_CBP_CFP |
+			SND_SOC_DAIFMT_GATED,
+		SND_SOC_DAILINK_REG(codec),
+	},
+};
+
+static struct snd_soc_card an7581_wm8960_card = {
+	.name = "an7581-wm8960",
+	.owner = THIS_MODULE,
+	.dai_link = an7581_wm8960_dai_links,
+	.num_links = ARRAY_SIZE(an7581_wm8960_dai_links),
+};
+
+static int an7581_wm8960_machine_probe(struct platform_device *pdev)
+{
+	struct device_node *platform_dai_node, *codec_dai_node;
+	struct snd_soc_card *card = &an7581_wm8960_card;
+	struct device_node *of_platform, *codec;
+	struct snd_soc_dai_link *dai_link;
+	int i, d, ret;
+
+	card->dev = &pdev->dev;
+
+	of_platform = of_get_child_by_name(pdev->dev.of_node, "platform");
+
+	if (of_platform) {
+		platform_dai_node = of_parse_phandle(of_platform, "sound-dai", 0);
+		of_node_put(of_platform);
+
+		if (!platform_dai_node) {
+			dev_err(&pdev->dev, "Failed to parse platform/sound-dai property\n");
+			return -EINVAL;
+		}
+	} else {
+		dev_err(&pdev->dev, "Property 'platform' missing or invalid\n");
+		return -EINVAL;
+	}
+
+	for_each_card_prelinks(card, i, dai_link) {
+		struct snd_soc_dai_link_component *platform;
+
+		dai_link->num_platforms = 2;
+		for_each_link_platforms(dai_link, d, platform) {
+			if (platform->name)
+				continue;
+			platform->of_node = platform_dai_node;
+		}
+	}
+
+	codec = of_get_child_by_name(pdev->dev.of_node, "codec");
+
+	if (codec) {
+		codec_dai_node = of_parse_phandle(codec, "sound-dai", 0);
+		of_node_put(codec);
+
+		if (!codec_dai_node) {
+			of_node_put(platform_dai_node);
+			dev_err(&pdev->dev, "Failed to parse codec/sound-dai property\n");
+			return -EINVAL;
+		}
+	} else {
+		of_node_put(platform_dai_node);
+		dev_err(&pdev->dev, "Property 'codec' missing or invalid\n");
+		return -EINVAL;
+	}
+
+	for_each_card_prelinks(card, i, dai_link) {
+		if (dai_link->codecs->name)
+			continue;
+		dai_link->codecs->of_node = codec_dai_node;
+	}
+
+	ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to parse audio-routing: %d\n", ret);
+		goto err_of_node_put;
+	}
+
+	ret = devm_snd_soc_register_card(&pdev->dev, card);
+	if (ret) {
+		dev_err_probe(&pdev->dev, ret, "%s snd_soc_register_card fail\n", __func__);
+		goto err_of_node_put;
+	}
+
+	return 0;
+
+err_of_node_put:
+	of_node_put(platform_dai_node);
+	of_node_put(codec_dai_node);
+	return ret;
+}
+
+static const struct of_device_id an7581_wm8960_machine_dt_match[] = {
+	{ .compatible = "airoha,an7581-wm8960-sound" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, an7581_wm8960_machine_dt_match);
+
+static struct platform_driver an7581_wm8960_driver = {
+	.driver = {
+		   .name = "an7581-wm8960",
+		   .of_match_table = an7581_wm8960_machine_dt_match,
+	},
+	.probe = an7581_wm8960_machine_probe,
+};
+module_platform_driver(an7581_wm8960_driver);
+
+MODULE_DESCRIPTION("Airoha SoC I2S platform driver for ALSA AN7581");
+MODULE_LICENSE("GPL");