diff --git a/target/linux/mediatek/files-5.4/sound/soc/mediatek/mt7986/mt7986-si3218x.c b/target/linux/mediatek/files-5.4/sound/soc/mediatek/mt7986/mt7986-si3218x.c
new file mode 100644
index 0000000..b91ee07
--- /dev/null
+++ b/target/linux/mediatek/files-5.4/sound/soc/mediatek/mt7986/mt7986-si3218x.c
@@ -0,0 +1,297 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * mt7986-si3218x.c  --  MT7986-SI3218X ALSA SoC machine driver
+ *
+ * Copyright (c) 2023 MediaTek Inc.
+ * Authors: Vic Wu <vic.wu@mediatek.com>
+ *          Maso Huang <maso.huang@mediatek.com>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/module.h>
+#include <sound/soc.h>
+
+#include "mt7986-afe-common.h"
+#include "mt7986-reg.h"
+#include "../common/mtk-afe-platform-driver.h"
+
+enum {
+	HOPPING_CLK = 0,
+	APLL_CLK = 1,
+};
+
+enum {
+	I2S = 0,
+	PCMA = 4,
+	PCMB,
+};
+
+enum {
+	ETDM_IN5 = 2,
+	ETDM_OUT5 = 10,
+};
+
+enum {
+	AFE_FS_8K = 0,
+	AFE_FS_11K = 1,
+	AFE_FS_12K = 2,
+	AFE_FS_16K = 4,
+	AFE_FS_22K = 5,
+	AFE_FS_24K = 6,
+	AFE_FS_32K = 8,
+	AFE_FS_44K = 9,
+	AFE_FS_48K = 10,
+	AFE_FS_88K = 13,
+	AFE_FS_96K = 14,
+	AFE_FS_176K = 17,
+	AFE_FS_192K = 18,
+};
+
+enum {
+	ETDM_FS_8K = 0,
+	ETDM_FS_12K = 1,
+	ETDM_FS_16K = 2,
+	ETDM_FS_24K = 3,
+	ETDM_FS_32K = 4,
+	ETDM_FS_48K = 5,
+	ETDM_FS_96K = 7,
+	ETDM_FS_192K = 9,
+	ETDM_FS_11K = 16,
+	ETDM_FS_22K = 17,
+	ETDM_FS_44K = 18,
+	ETDM_FS_88K = 19,
+	ETDM_FS_176K = 20,
+};
+
+static int mt7986_si3218x_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_component *component =
+		snd_soc_rtdcom_lookup(rtd, AFE_PCM_NAME);
+	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(component);
+	struct mt7986_afe_private *afe_priv = afe->platform_priv;
+	int ret;
+
+	/* enable clk */
+	ret = clk_bulk_prepare_enable(afe_priv->num_clks, afe_priv->clks);
+	if (ret) {
+		dev_err(afe->dev, "Failed to enable clocks\n");
+		return ret;
+	}
+
+	regmap_update_bits(afe->regmap, AUDIO_TOP_CON2, CLK_OUT5_PDN_MASK, 0);
+	regmap_update_bits(afe->regmap, AUDIO_TOP_CON2, CLK_IN5_PDN_MASK, 0);
+	regmap_update_bits(afe->regmap, AUDIO_TOP_CON4, 0x3fff, 0);
+	regmap_update_bits(afe->regmap, AUDIO_ENGEN_CON0, AUD_APLL2_EN_MASK,
+			   AUD_APLL2_EN);
+	regmap_update_bits(afe->regmap, AUDIO_ENGEN_CON0, AUD_26M_EN_MASK,
+			   AUD_26M_EN);
+
+	/* set ETDM_IN5_CON0 */
+	regmap_update_bits(afe->regmap, ETDM_IN5_CON0, ETDM_SYNC_MASK,
+			   ETDM_SYNC);
+	regmap_update_bits(afe->regmap, ETDM_IN5_CON0, ETDM_FMT_MASK,
+			   FIELD_PREP(ETDM_FMT_MASK, PCMA));
+	regmap_update_bits(afe->regmap, ETDM_IN5_CON0, ETDM_BIT_LEN_MASK,
+			   FIELD_PREP(ETDM_BIT_LEN_MASK, 16 - 1));
+	regmap_update_bits(afe->regmap, ETDM_IN5_CON0, ETDM_WRD_LEN_MASK,
+			   FIELD_PREP(ETDM_WRD_LEN_MASK, 16 - 1));
+	regmap_update_bits(afe->regmap, ETDM_IN5_CON0, ETDM_CH_NUM_MASK,
+			   FIELD_PREP(ETDM_CH_NUM_MASK, 4 - 1));
+	regmap_update_bits(afe->regmap, ETDM_IN5_CON0, RELATCH_SRC_MASK,
+			   FIELD_PREP(RELATCH_SRC_MASK, APLL_CLK));
+
+	/* set ETDM_IN5_CON2 */
+	regmap_update_bits(afe->regmap, ETDM_IN5_CON2, IN_CLK_SRC_MASK,
+			   IN_CLK_SRC(APLL_CLK));
+
+	/* set ETDM_IN5_CON3 */
+	regmap_update_bits(afe->regmap, ETDM_IN5_CON3, IN_SEL_FS_MASK,
+			   IN_SEL_FS(ETDM_FS_16K));
+
+	/* set ETDM_IN5_CON4 */
+	regmap_update_bits(afe->regmap, ETDM_IN5_CON4, IN_CLK_INV_MASK,
+			   IN_CLK_INV);
+	regmap_update_bits(afe->regmap, ETDM_IN5_CON4, IN_RELATCH_MASK,
+			   IN_RELATCH(AFE_FS_16K));
+
+	/* set ETDM_OUT5_CON0 */
+	regmap_update_bits(afe->regmap, ETDM_OUT5_CON0, ETDM_FMT_MASK,
+			   FIELD_PREP(ETDM_FMT_MASK, PCMA));
+	regmap_update_bits(afe->regmap, ETDM_OUT5_CON0, ETDM_BIT_LEN_MASK,
+			   FIELD_PREP(ETDM_BIT_LEN_MASK, 16 - 1));
+	regmap_update_bits(afe->regmap, ETDM_OUT5_CON0, ETDM_WRD_LEN_MASK,
+			   FIELD_PREP(ETDM_WRD_LEN_MASK, 16 - 1));
+	regmap_update_bits(afe->regmap, ETDM_OUT5_CON0, ETDM_CH_NUM_MASK,
+			   FIELD_PREP(ETDM_CH_NUM_MASK, 4 - 1));
+	regmap_update_bits(afe->regmap, ETDM_OUT5_CON0, RELATCH_SRC_MASK,
+			   FIELD_PREP(RELATCH_SRC_MASK, APLL_CLK));
+
+	/* set ETDM_OUT5_CON4 */
+	regmap_update_bits(afe->regmap, ETDM_OUT5_CON4, OUT_SEL_FS_MASK,
+			   OUT_SEL_FS(ETDM_FS_16K));
+	regmap_update_bits(afe->regmap, ETDM_OUT5_CON4, OUT_CLK_SRC_MASK,
+			   OUT_CLK_SRC(APLL_CLK));
+	regmap_update_bits(afe->regmap, ETDM_OUT5_CON4, OUT_RELATCH_MASK,
+			   OUT_RELATCH(AFE_FS_16K));
+
+	/* set ETDM_OUT5_CON5 */
+	regmap_update_bits(afe->regmap, ETDM_OUT5_CON5, OUT_CLK_INV_MASK,
+			   OUT_CLK_INV);
+	regmap_update_bits(afe->regmap, ETDM_OUT5_CON5, ETDM_CLK_DIV_MASK,
+			   ETDM_CLK_DIV);
+
+	/* set external loopback */
+	regmap_update_bits(afe->regmap, ETDM_4_7_COWORK_CON0, OUT_SEL_MASK,
+			   OUT_SEL(ETDM_IN5));
+
+	/* enable ETDM */
+	regmap_update_bits(afe->regmap, ETDM_IN5_CON0, ETDM_EN_MASK,
+			   ETDM_EN);
+	regmap_update_bits(afe->regmap, ETDM_OUT5_CON0, ETDM_EN_MASK,
+			   ETDM_EN);
+
+	return 0;
+}
+
+SND_SOC_DAILINK_DEFS(playback,
+	DAILINK_COMP_ARRAY(COMP_CPU("DL1")),
+	DAILINK_COMP_ARRAY(COMP_DUMMY()),
+	DAILINK_COMP_ARRAY(COMP_EMPTY()));
+
+SND_SOC_DAILINK_DEFS(capture,
+	DAILINK_COMP_ARRAY(COMP_CPU("UL1")),
+	DAILINK_COMP_ARRAY(COMP_DUMMY()),
+	DAILINK_COMP_ARRAY(COMP_EMPTY()));
+
+SND_SOC_DAILINK_DEFS(codec,
+	DAILINK_COMP_ARRAY(COMP_CPU("ETDM")),
+	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "proslic_spi-aif")),
+	DAILINK_COMP_ARRAY(COMP_EMPTY()));
+
+static struct snd_soc_dai_link mt7986_si3218x_dai_links[] = {
+	/* FE */
+	{
+		.name = "si3218x-playback",
+		.stream_name = "si3218x-playback",
+		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
+			    SND_SOC_DPCM_TRIGGER_POST},
+		.dynamic = 1,
+		.dpcm_playback = 1,
+		SND_SOC_DAILINK_REG(playback),
+	},
+	{
+		.name = "si3218x-capture",
+		.stream_name = "si3218x-capture",
+		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
+			    SND_SOC_DPCM_TRIGGER_POST},
+		.dynamic = 1,
+		.dpcm_capture = 1,
+		SND_SOC_DAILINK_REG(capture),
+	},
+	/* BE */
+	{
+		.name = "si3218x-codec",
+		.no_pcm = 1,
+		.dai_fmt = SND_SOC_DAIFMT_DSP_A |
+			SND_SOC_DAIFMT_IB_NF |
+			SND_SOC_DAIFMT_CBS_CFS,
+		.init = mt7986_si3218x_init,
+		.dpcm_playback = 1,
+		.dpcm_capture = 1,
+		SND_SOC_DAILINK_REG(codec),
+	},
+};
+
+static struct snd_soc_card mt7986_si3218x_card = {
+	.name = "mt7986-si3218x",
+	.owner = THIS_MODULE,
+	.dai_link = mt7986_si3218x_dai_links,
+	.num_links = ARRAY_SIZE(mt7986_si3218x_dai_links),
+};
+
+static int mt7986_si3218x_machine_probe(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = &mt7986_si3218x_card;
+	struct snd_soc_dai_link *dai_link;
+	struct device_node *platform, *codec;
+	struct device_node *platform_dai_node, *codec_dai_node;
+	int ret, i;
+
+	card->dev = &pdev->dev;
+
+	platform = of_get_child_by_name(pdev->dev.of_node, "platform");
+
+	if (platform) {
+		platform_dai_node = of_parse_phandle(platform, "sound-dai", 0);
+		of_node_put(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) {
+		if (dai_link->platforms->name)
+			continue;
+		dai_link->platforms->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 = devm_snd_soc_register_card(&pdev->dev, card);
+	if (ret) {
+		dev_err(&pdev->dev, "%s snd_soc_register_card fail: %d\n", __func__, ret);
+		goto err_of_node_put;
+	}
+
+err_of_node_put:
+	of_node_put(platform_dai_node);
+	of_node_put(codec_dai_node);
+	return ret;
+}
+
+static const struct of_device_id mt7986_si3218x_machine_dt_match[] = {
+	{.compatible = "mediatek,mt7986-si3218x-sound"},
+	{ /* sentinel */ }
+};
+
+static struct platform_driver mt7986_si3218x_machine = {
+	.driver = {
+		.name = "mt7986-si3218x",
+		.of_match_table = mt7986_si3218x_machine_dt_match,
+	},
+	.probe = mt7986_si3218x_machine_probe,
+};
+
+module_platform_driver(mt7986_si3218x_machine);
+
+/* Module information */
+MODULE_DESCRIPTION("MT7986 SI3218X ALSA SoC machine driver");
+MODULE_AUTHOR("Vic Wu <vic.wu@mediatek.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("mt7986 si3218x soc card");