diff --git a/src/mainboard/google/brox/Kconfig b/src/mainboard/google/brox/Kconfig
index 08a0656e6e..f6f33b6773 100644
--- a/src/mainboard/google/brox/Kconfig
+++ b/src/mainboard/google/brox/Kconfig
@@ -76,7 +76,7 @@ config DEVICETREE
 
 config DRIVER_TPM_I2C_BUS
 	hex
-	default 0x1 if BOARD_GOOGLE_BROX
+	default 0x4 if BOARD_GOOGLE_BROX
 
 config DRIVER_TPM_I2C_ADDR
 	hex
@@ -87,7 +87,7 @@ config FMDFILE
 
 config TPM_TIS_ACPI_INTERRUPT
 	int
-	default 13
+	default 66 # GPE0_DW2_02 (GPP_E2)
 
 config OVERRIDE_DEVICETREE
 	default "variants/\$(CONFIG_VARIANT_DIR)/overridetree.cb"
diff --git a/src/mainboard/google/brox/variants/baseboard/brox/devicetree.cb b/src/mainboard/google/brox/variants/baseboard/brox/devicetree.cb
index 2b73ad2b1d..c8b4c5aeaa 100644
--- a/src/mainboard/google/brox/variants/baseboard/brox/devicetree.cb
+++ b/src/mainboard/google/brox/variants/baseboard/brox/devicetree.cb
@@ -76,14 +76,12 @@ chip soc/intel/alderlake
 	#+-------------------+---------------------------+
 	#| Field             |  Value                    |
 	#+-------------------+---------------------------+
-	#| GSPI1             | Fingerprint MCU           |
-	#| I2C0              | Audio and WFC             |
-	#| I2C1              | cr50 TPM. Early init is   |
+	#| I2C0              | Trackpad                  |
+	#| I2C1              | Touchscreen               |
+	#| I2C2              | ISH Sensor                |
+	#| I2C4              | cr50 TPM. Early init is   |
 	#|                   | required to set up a BAR  |
 	#|                   | for TPM communication     |
-	#| I2C2              | SAR0                      |
-	#| I2C3              | Touchscreen               |
-	#| I2C5              | Trackpad                  |
 	#+-------------------+---------------------------+
 	register "common_soc_config" = "{
 		.i2c[0] = {
@@ -94,24 +92,18 @@ chip soc/intel/alderlake
 		},
 		.i2c[1] = {
 			.speed = I2C_SPEED_FAST,
-			.rise_time_ns = 650,
+			.rise_time_ns = 600,
 			.fall_time_ns = 400,
 			.data_hold_time_ns = 50,
 		},
 		.i2c[2] = {
-			.speed = I2C_SPEED_FAST,
-			.rise_time_ns = 900,
-			.fall_time_ns = 400,
-			.data_hold_time_ns = 50,
-		},
-		.i2c[3] = {
-			.early_init = 1,
 			.speed = I2C_SPEED_FAST,
 			.rise_time_ns = 600,
 			.fall_time_ns = 400,
 			.data_hold_time_ns = 50,
 		},
-		.i2c[5] = {
+		.i2c[4] = {
+			.early_init = 1,
 			.speed = I2C_SPEED_FAST,
 			.rise_time_ns = 650,
 			.fall_time_ns = 400,
@@ -167,7 +159,13 @@ chip soc/intel/alderlake
 				device generic 0 on end
 			end
 		end
-		device ref i2c3 on end
+		device ref i2c4 on
+			chip drivers/i2c/tpm
+				register "hid" = ""GOOG0005""
+				register "irq" = "ACPI_IRQ_EDGE_LOW(GPP_E2_IRQ)"
+				device i2c 50 on end
+			end
+		end
 		device ref heci1 on end
 		device ref sata on end
 		device ref pcie_rp8 on