diff --git a/target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7981.dtsi b/target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7981.dtsi
index f5bd0ca..0f50a15 100644
--- a/target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7981.dtsi
+++ b/target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7981.dtsi
@@ -251,12 +251,12 @@
 		status = "disabled";
 	};
 
-	i2c0: i2c@11008000 {
-		compatible = "mediatek,mt7986-i2c";
-		reg = <0 0x11008000 0 0x90>,
+	i2c0: i2c@11007000 {
+		compatible = "mediatek,mt7981-i2c";
+		reg = <0 0x11007000 0 0x1000>,
 		      <0 0x10217080 0 0x80>;
 		interrupts = <GIC_SPI 136 IRQ_TYPE_LEVEL_HIGH>;
-		clock-div = <5>;
+		clock-div = <1>;
 		clocks = <&infracfg_ao CK_INFRA_I2CO_CK>,
 			 <&infracfg_ao CK_INFRA_AP_DMA_CK>;
 		clock-names = "main", "dma";
diff --git a/target/linux/mediatek/mt7981/config-5.4 b/target/linux/mediatek/mt7981/config-5.4
index 5ad53fb..826be0f 100644
--- a/target/linux/mediatek/mt7981/config-5.4
+++ b/target/linux/mediatek/mt7981/config-5.4
@@ -219,6 +219,10 @@
 CONFIG_HW_RANDOM_MTK=y
 CONFIG_HZ=250
 CONFIG_HZ_250=y
+CONFIG_I2C=y
+CONFIG_I2C_BOARDINFO=y
+CONFIG_I2C_CHARDEV=y
+CONFIG_I2C_MT65XX=y
 CONFIG_ICPLUS_PHY=y
 CONFIG_IIO=y
 CONFIG_IKCONFIG=y
diff --git a/target/linux/mediatek/patches-5.4/0901-i2c-busses-add-mt7981-support.patch b/target/linux/mediatek/patches-5.4/0901-i2c-busses-add-mt7981-support.patch
new file mode 100644
index 0000000..f79d2f8
--- /dev/null
+++ b/target/linux/mediatek/patches-5.4/0901-i2c-busses-add-mt7981-support.patch
@@ -0,0 +1,43 @@
+diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
+index e1ef012..4fd4721 100644
+--- a/drivers/i2c/busses/i2c-mt65xx.c
++++ b/drivers/i2c/busses/i2c-mt65xx.c
+@@ -157,7 +157,7 @@ static const u16 mt_i2c_regs_v1[] = {
+ 
+ static const u16 mt_i2c_regs_v2[] = {
+ 	[OFFSET_DATA_PORT] = 0x0,
+-	[OFFSET_SLAVE_ADDR] = 0x4,
++	[OFFSET_SLAVE_ADDR] = 0x94,
+ 	[OFFSET_INTR_MASK] = 0x8,
+ 	[OFFSET_INTR_STAT] = 0xc,
+ 	[OFFSET_CONTROL] = 0x10,
+@@ -289,6 +289,18 @@ static const struct mtk_i2c_compatible mt7622_compat = {
+ 	.ltiming_adjust = 0,
+ };
+ 
++static const struct mtk_i2c_compatible mt7981_compat = {
++	.regs = mt_i2c_regs_v2,
++	.pmic_i2c = 0,
++	.dcm = 0,
++	.auto_restart = 1,
++	.aux_len_reg = 1,
++	.support_33bits = 1,
++	.timing_adjust = 1,
++	.dma_sync = 1,
++	.ltiming_adjust = 1,
++};
++
+ static const struct mtk_i2c_compatible mt7986_compat = {
+ 	.quirks = &mt7622_i2c_quirks,
+ 	.regs = mt_i2c_regs_v1,
+@@ -332,6 +344,7 @@ static const struct of_device_id mtk_i2c_of_match[] = {
+ 	{ .compatible = "mediatek,mt6577-i2c", .data = &mt6577_compat },
+ 	{ .compatible = "mediatek,mt6589-i2c", .data = &mt6589_compat },
+ 	{ .compatible = "mediatek,mt7622-i2c", .data = &mt7622_compat },
++	{ .compatible = "mediatek,mt7981-i2c", .data = &mt7981_compat },
+ 	{ .compatible = "mediatek,mt7986-i2c", .data = &mt7986_compat },
+ 	{ .compatible = "mediatek,mt8173-i2c", .data = &mt8173_compat },
+ 	{ .compatible = "mediatek,mt8183-i2c", .data = &mt8183_compat },
+-- 
+2.18.0
+