Change in coreboot[master]: mb/google/dedede/var/metaknight: Add support to handle pen detection

[David Wu (Code Review)]

David Wu has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/51709 )

Change subject: mb/google/dedede/var/metaknight: Add support to handle pen detection
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mb/google/dedede/var/metaknight: Add support to handle pen detection

Update devicetree and gpio setting of metaknight to handle pen detection.

BUG=b:180426949
TEST=Build and check behavior is expected.

Signed-off-by: David Wu 
Change-Id: Ieeca20eff57b16217a13d996dca3f662911f3e5a
---
M src/mainboard/google/dedede/variants/metaknight/gpio.c
M src/mainboard/google/dedede/variants/metaknight/overridetree.cb
2 files changed, 14 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/09/51709/1

diff --git a/src/mainboard/google/dedede/variants/metaknight/gpio.c b/src/mainboard/google/dedede/variants/metaknight/gpio.c
index d6a7fd5..e1d2552 100644
--- a/src/mainboard/google/dedede/variants/metaknight/gpio.c
+++ b/src/mainboard/google/dedede/variants/metaknight/gpio.c
@@ -10,6 +10,9 @@
    /* A10 : WWAN_EN => LTE_PWR_OFF_ODL */
    PAD_CFG_GPO(GPP_A10, 1, PWROK),

+	/* C12 : AP_PEN_DET_ODL */
+	PAD_CFG_GPI_GPIO_DRIVER(GPP_C12, UP_20K, DEEP),
+
    /* H17 : WWAN_RST_L => LTE_RESET_R_ODL */
    PAD_CFG_GPO(GPP_H17, 0, PLTRST),
 };
diff --git a/src/mainboard/google/dedede/variants/metaknight/overridetree.cb b/src/mainboard/google/dedede/variants/metaknight/overridetree.cb
index 322f72c..c453c87 100644
--- a/src/mainboard/google/dedede/variants/metaknight/overridetree.cb
+++ b/src/mainboard/google/dedede/variants/metaknight/overridetree.cb
@@ -116,6 +116,17 @@
    		end
    	end # I2C 0
    	device pci 15.2 on
+                        chip drivers/generic/gpio_keys
+				register "name" = ""PENH""
+				register "gpio" = "ACPI_GPIO_INPUT_ACTIVE_LOW(GPP_C12)"
+				register "key.wakeup_route" = "WAKEUP_ROUTE_GPIO_IRQ"
+				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""