mb/google/poppy/variants/nautilus: Add gpio-keys ACPI node for PENH

This change uses gpio_keys driver to add ACPI node for pen eject event.

BUG=b:71329519
TEST=Verified using evtest that pen eject event results in events as
expected.

Change-Id: Ib293c2ca532c8ed9e2587143b1a69300cd9fa4e9
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/23238
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>

src/mainboard/google/poppy/Kconfig

@@ -2,6 +2,7 @@
 config BOARD_GOOGLE_BASEBOARD_POPPY
 	def_bool n
 	select BOARD_ROMSIZE_KB_16384
+	select DRIVERS_GENERIC_GPIO_KEYS
 	select DRIVERS_I2C_GENERIC
 	select DRIVERS_I2C_HID
 	select EC_GOOGLE_CHROMEEC

src/mainboard/google/poppy/variants/nautilus/devicetree.cb

@@ -321,6 +321,15 @@ chip soc/intel/skylake
 				register "hid_desc_reg_offset" = "0x1"
 				device i2c 0x9 on end
 			end
+			chip drivers/generic/gpio_keys
+				register "name" = ""PENH""
+				register "gpio" = "ACPI_GPIO_INPUT_ACTIVE_LOW(GPP_B19)"
+				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 # I2C #3
 		device pci 16.0 on  end # Management Engine Interface 1
 		device pci 16.1 off end # Management Engine Interface 2

src/mainboard/google/poppy/variants/nautilus/gpio.c

@@ -101,7 +101,7 @@ static const struct pad_config gpio_table[] = {
 	/* B18 : GSPI0_MOSI ==> NC */
 	PAD_CFG_NC(GPP_B18),
 	/* B19 : GSPI1_CS# ==> CHP3_PEN_EJECT - for notification */
-	PAD_CFG_GPI(GPP_B19, NONE, DEEP),
+	PAD_CFG_GPI_GPIO_DRIVER(GPP_B19, NONE, DEEP),
 	/* B20 : GSPI1_CLK ==> NC */
 	PAD_CFG_NC(GPP_B20),
 	/* B21 : GSPI1_MISO ==> CHP3_PEN_EJECT - for wake event */