diff --git a/src/mainboard/google/rex/Kconfig b/src/mainboard/google/rex/Kconfig
index 6aca9e3557..9ddd9fde5f 100644
--- a/src/mainboard/google/rex/Kconfig
+++ b/src/mainboard/google/rex/Kconfig
@@ -33,6 +33,7 @@ config BOARD_GOOGLE_BASEBOARD_REX
 	def_bool n
 	select BOARD_GOOGLE_REX_COMMON
 	select DRIVERS_INTEL_PMC
+	select DRIVERS_GENERIC_GPIO_KEYS
 	select DRIVERS_WWAN_FM350GL
 	select ENABLE_TCSS_DISPLAY_DETECTION if RUN_FSP_GOP
 	select HAVE_SLP_S0_GATE
diff --git a/src/mainboard/google/rex/variants/rex0/gpio.c b/src/mainboard/google/rex/variants/rex0/gpio.c
index 8e45149e86..671ce9792d 100644
--- a/src/mainboard/google/rex/variants/rex0/gpio.c
+++ b/src/mainboard/google/rex/variants/rex0/gpio.c
@@ -198,8 +198,8 @@ static const struct pad_config gpio_table[] = {
 	PAD_CFG_GPI_LOCK(GPP_E02, NONE, LOCK_CONFIG),
 	/* GPP_E03 : [] ==> GSC_SOC_INT_ODL */
 	PAD_CFG_GPI_APIC_LOCK(GPP_E03, NONE, LEVEL, INVERT, LOCK_CONFIG),
-	/* GPP_E04 : [] ==> HPS_INT_L */
-	PAD_CFG_GPI_IRQ_WAKE(GPP_E04, NONE, PLTRST, LEVEL, NONE),
+	/* GPP_E04 : [] ==> PEN_DETECT */
+	PAD_CFG_GPI_IRQ_WAKE(GPP_E04, NONE, PLTRST, LEVEL, INVERT),
 	/* GPP_E05 : [] ==> USB_A0_RT_RST_ODL */
 	PAD_CFG_GPO(GPP_E05, 1, DEEP),
 	/* GPP_E06 : GPP_E06_STRAP ==> Component NC */
diff --git a/src/mainboard/google/rex/variants/rex0/overridetree.cb b/src/mainboard/google/rex/variants/rex0/overridetree.cb
index 59147c7ba4..84a0b6a4df 100644
--- a/src/mainboard/google/rex/variants/rex0/overridetree.cb
+++ b/src/mainboard/google/rex/variants/rex0/overridetree.cb
@@ -533,6 +533,16 @@ chip soc/intel/meteorlake
 				register "hid_desc_reg_offset" = "0x01"
 				device i2c 10 on end
 			end
+			chip drivers/generic/gpio_keys
+				register "name" = ""PENH""
+				# GPP_E04 is the IRQ source
+				register "gpio" = "ACPI_GPIO_INPUT_ACTIVE_LOW(GPP_E04)"
+				register "key.dev_name" = ""EJCT""
+				register "key.linux_code" = "SW_PEN_INSERTED"
+				register "key.linux_input_type" = "EV_SW"
+				register "key.label" = ""pen_eject""
+				device generic 0 on end
+			end
 		end
 		device ref i2c2 on end
 		device ref i2c3 on