diff --git a/target/linux/mediatek/patches-5.4/999-2111-i2c-busses-add-mt7981-support.patch b/target/linux/mediatek/patches-5.4/999-2111-i2c-busses-add-mt7981-support.patch
new file mode 100644
index 0000000..ba37f4a
--- /dev/null
+++ b/target/linux/mediatek/patches-5.4/999-2111-i2c-busses-add-mt7981-support.patch
@@ -0,0 +1,52 @@
+From c4ad4b0aa7fb10beb510b99caba9cd027a88a723 Mon Sep 17 00:00:00 2001
+From: Sam Shih <sam.shih@mediatek.com>
+Date: Fri, 2 Jun 2023 13:06:06 +0800
+Subject: [PATCH] [slow-speed-io][999-2111-i2c-busses-add-mt7981-support.patch]
+
+---
+ drivers/i2c/busses/i2c-mt65xx.c | 15 ++++++++++++++-
+ 1 file changed, 14 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
+index 14d96c876..995e8bbaf 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 },
+-- 
+2.34.1
+