From 5e6e5c11c7841d5a1df8e7a33466df1a8a2a6314 Mon Sep 17 00:00:00 2001
From: Wisley Chen <wisley.chen@quantatw.com>
Date: Fri, 15 Jan 2021 13:48:38 +0800
Subject: [PATCH] mb/google/dedede/var/drawcia: Add support to handle pen
 detection

For board version 6 afterward, it will have external pull-up for
GPP_C12, and remove internal pull-up.

BUG=b:177618684
TEST=emerge-dedede coreboot, check evtest if SW_PEN_INSERTED event
(value:1/0) when insert/eject pen, and eject pen to wake system from s0ix

Signed-off-by: Wisley Chen <wisley.chen@quantatw.com>
Change-Id: I503873afb48384168dcd8a822c7246655898356e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49469
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: Henry Sun <henrysun@google.com>
---
 .../dedede/variants/drawcia/Makefile.inc      |  1 +
 .../google/dedede/variants/drawcia/gpio.c     | 36 +++++++++++++++++++
 .../dedede/variants/drawcia/overridetree.cb   | 11 ++++++
 3 files changed, 48 insertions(+)
 create mode 100644 src/mainboard/google/dedede/variants/drawcia/gpio.c

diff --git a/src/mainboard/google/dedede/variants/drawcia/Makefile.inc b/src/mainboard/google/dedede/variants/drawcia/Makefile.inc
index 24c75d1d9a..04eb9a4877 100644
--- a/src/mainboard/google/dedede/variants/drawcia/Makefile.inc
+++ b/src/mainboard/google/dedede/variants/drawcia/Makefile.inc
@@ -1,3 +1,4 @@
 ## SPDX-License-Identifier: GPL-2.0-or-later
 
+ramstage-y += gpio.c
 ramstage-$(CONFIG_FW_CONFIG) += variant.c
diff --git a/src/mainboard/google/dedede/variants/drawcia/gpio.c b/src/mainboard/google/dedede/variants/drawcia/gpio.c
new file mode 100644
index 0000000000..a91a94ee55
--- /dev/null
+++ b/src/mainboard/google/dedede/variants/drawcia/gpio.c
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <baseboard/gpio.h>
+#include <baseboard/variants.h>
+#include <fw_config.h>
+#include <console/console.h>
+#include <ec/google/chromeec/ec.h>
+
+/* Pad configuration in ramstage*/
+static const struct pad_config pre_board6_gpio_table[] = {
+
+	/* C12 : AP_PEN_DET_ODL */
+	PAD_CFG_GPI_GPIO_DRIVER(GPP_C12, UP_20K, DEEP),
+};
+
+/* bid6: Pad configuration for board version 6 afterward in ramstage*/
+static const struct pad_config board6_gpio_table[] = {
+
+	/* C12 : AP_PEN_DET_ODL has an external pull-up and hence no pad termination.*/
+	PAD_CFG_GPI_GPIO_DRIVER(GPP_C12, NONE, DEEP),
+};
+
+const struct pad_config *variant_override_gpio_table(size_t *num)
+{
+	uint32_t board_version;
+	*num = ARRAY_SIZE(pre_board6_gpio_table);
+
+	if (!google_chromeec_cbi_get_board_version(&board_version)) {
+		if (board_version >= 6) {
+			*num = ARRAY_SIZE(board6_gpio_table);
+			return board6_gpio_table;
+		}
+	}
+
+	return pre_board6_gpio_table;
+}
diff --git a/src/mainboard/google/dedede/variants/drawcia/overridetree.cb b/src/mainboard/google/dedede/variants/drawcia/overridetree.cb
index 59593432fe..fbc6f0b8a5 100644
--- a/src/mainboard/google/dedede/variants/drawcia/overridetree.cb
+++ b/src/mainboard/google/dedede/variants/drawcia/overridetree.cb
@@ -162,6 +162,17 @@ chip soc/intel/jasperlake
 			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/generic
 				register "hid" = ""ELAN0001""
 				register "desc" = ""ELAN Touchscreen""