[coreboot-gerrit] Change in coreboot[master]: mb/google/dedede/var/magolor: Add stylus pen function

[Ren Kuo (Code Review)]

Ren Kuo has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/60185 )

Change subject: mb/google/dedede/var/magolor: Add stylus pen function
......................................................................

mb/google/dedede/var/magolor: Add stylus pen function

Update devicetree and gpio to handle stylus pen detection.

BUG=b:167983049
TEST=Build firmware and check behavior is expected.
     Wake up from suspend when pen is removed from the garage.
     Present the stylus menu when pen is removed from the garage.

Change-Id: I62489bb289b18f9aa0823005224eda3ef5218e03
Signed-off-by: Ren Kuo 
---
M src/mainboard/google/dedede/variants/magolor/Makefile.inc
A src/mainboard/google/dedede/variants/magolor/gpio.c
M src/mainboard/google/dedede/variants/magolor/overridetree.cb
3 files changed, 31 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/85/60185/1

diff --git a/src/mainboard/google/dedede/variants/magolor/Makefile.inc b/src/mainboard/google/dedede/variants/magolor/Makefile.inc
index 24c75d1..3333383 100644
--- a/src/mainboard/google/dedede/variants/magolor/Makefile.inc
+++ b/src/mainboard/google/dedede/variants/magolor/Makefile.inc
@@ -1,3 +1,4 @@
 ## SPDX-License-Identifier: GPL-2.0-or-later

ramstage-$(CONFIG_FW_CONFIG) += variant.c
+ramstage-y += gpio.c
diff --git a/src/mainboard/google/dedede/variants/magolor/gpio.c b/src/mainboard/google/dedede/variants/magolor/gpio.c
new file mode 100644
index 0000000..795d731
--- /dev/null
+++ b/src/mainboard/google/dedede/variants/magolor/gpio.c
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <baseboard/gpio.h>
+#include <baseboard/variants.h>
+#include <commonlib/helpers.h>
+
+/* Pad configuration in ramstage*/
+static const struct pad_config gpio_table[] = {
+
+	/* C12 : AP_PEN_DET_ODL (external pull-high) */
+	PAD_CFG_GPI_GPIO_DRIVER(GPP_C12, NONE, DEEP),
+
+};
+
+const struct pad_config *variant_override_gpio_table(size_t *num)
+{
+	*num = ARRAY_SIZE(gpio_table);
+	return gpio_table;
+}
diff --git a/src/mainboard/google/dedede/variants/magolor/overridetree.cb b/src/mainboard/google/dedede/variants/magolor/overridetree.cb
index 24b32db..666c3ce 100644
--- a/src/mainboard/google/dedede/variants/magolor/overridetree.cb
+++ b/src/mainboard/google/dedede/variants/magolor/overridetree.cb
@@ -187,6 +187,17 @@
    		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" = ""ELAN6915""
    			register "generic.desc" = ""ELAN Touchscreen""