Patrick Georgi submitted this change.

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mb/google/dedede: add PEN for Boten

Update devicetree of boten that enable stylus

BUG=b:160752604
BRANCH=NONE
TEST=build bios and verify function for boten

Signed-off-by: alec.wang <alec.wang@lcfc.corp-partner.google.com>
Change-Id: Ifbcac18fcf758f3d870a6af0d1b03e34369414c0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45807
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marco Chen <marcochen@google.com>
Reviewed-by: Jamie Chen <jamie.chen@intel.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
---
M src/mainboard/google/dedede/Kconfig
M src/mainboard/google/dedede/variants/boten/gpio.c
M src/mainboard/google/dedede/variants/boten/overridetree.cb
3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/mainboard/google/dedede/Kconfig b/src/mainboard/google/dedede/Kconfig
index 377702d..597516c 100644
--- a/src/mainboard/google/dedede/Kconfig
+++ b/src/mainboard/google/dedede/Kconfig
@@ -3,6 +3,7 @@
 	select BOARD_ROMSIZE_KB_16384 if !BOARD_ROMSIZE_KB_32768
 	select CR50_USE_LONG_INTERRUPT_PULSES
 	select DPTF_USE_EISA_HID
+	select DRIVERS_GENERIC_GPIO_KEYS
 	select DRIVERS_I2C_GENERIC
 	select DRIVERS_I2C_GPIO_MUX
 	select DRIVERS_I2C_HID
diff --git a/src/mainboard/google/dedede/variants/boten/gpio.c b/src/mainboard/google/dedede/variants/boten/gpio.c
index 05a567f..f889c7f 100644
--- a/src/mainboard/google/dedede/variants/boten/gpio.c
+++ b/src/mainboard/google/dedede/variants/boten/gpio.c
@@ -7,6 +7,8 @@
 
 /* Pad configuration in ramstage*/
 static const struct pad_config gpio_table[] = {
+	/* C12 : AP_PEN_DET_ODL */
+	PAD_CFG_GPI_SCI(GPP_C12, NONE, DEEP, EDGE_SINGLE, NONE),
 	/* C18 : AP_I2C_EMR_SDA */
 	PAD_NC(GPP_C18, NONE),
 	/* C19 : AP_I2C_EMR_SCL */
diff --git a/src/mainboard/google/dedede/variants/boten/overridetree.cb b/src/mainboard/google/dedede/variants/boten/overridetree.cb
index 2ba6d9d..fa6cf22 100644
--- a/src/mainboard/google/dedede/variants/boten/overridetree.cb
+++ b/src/mainboard/google/dedede/variants/boten/overridetree.cb
@@ -10,7 +10,7 @@
 	#|                   | before memory is up       |
 	#| I2C0              | Trackpad                  |
 	#| I2C1              | Digitizer                 |
-	#| I2C2              | Touchscreen               |
+	#| I2C2              | Touchscreen, Stylus       |
 	#| I2C4              | Audio                     |
 	#+-------------------+---------------------------+
 	register "common_soc_config" = "{
@@ -107,6 +107,18 @@
 			end
 		end # I2C 0
 		device pci 15.2 on
+                        chip drivers/generic/gpio_keys
+                                register "name" = ""PENH""
+                                register "gpio" = "ACPI_GPIO_IRQ_EDGE_BOTH(GPP_C12)"
+                                register "key.wake_gpe" = "GPE0_DW1_12"
+                                register "key.wakeup_route" = "WAKEUP_ROUTE_SCI"
+                                register "key.wakeup_event_action" = "EV_ACT_DEASSERTED"
+                                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
 			chip drivers/i2c/hid
 				register "generic.hid" = ""GDIX0000""
 				register "generic.desc" = ""Goodix Touchscreen""

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