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