[S] Change in coreboot[main]: mb/google/brya/var/guren: Add Stylus Pen Function

[Daniel Peng (Code Review)]

Daniel Peng has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/87235?usp=email )

Change subject: mb/google/brya/var/guren: Add Stylus Pen Function
......................................................................

mb/google/brya/var/guren: Add Stylus Pen Function

New Stylus Pen for MAXEYE/0585501490 module for Guren360 project.
1. Add STYLUS fw_config setting
2. Enable stylus device settings
3. Disable the stylus GPIO pins based on fw_config

BUG=b:406168542
BRANCH=firmware-nissa-15217.B
TEST=1. emerge-nissa coreboot
     2. Confirm command evtest for stylus PRP0001:00 and workable.

Change-Id: I46d679d29b35d0f4fc70d63b74975d3bdfc40b7b
Signed-off-by: Daniel Peng 
---
M src/mainboard/google/brya/variants/guren/fw_config.c
M src/mainboard/google/brya/variants/guren/gpio.c
M src/mainboard/google/brya/variants/guren/overridetree.cb
3 files changed, 32 insertions(+), 4 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/35/87235/1

diff --git a/src/mainboard/google/brya/variants/guren/fw_config.c b/src/mainboard/google/brya/variants/guren/fw_config.c
index efebee2..63e55a3 100644
--- a/src/mainboard/google/brya/variants/guren/fw_config.c
+++ b/src/mainboard/google/brya/variants/guren/fw_config.c
@@ -27,6 +27,13 @@
    PAD_NC(GPP_H23, NONE),
 };

+static const struct pad_config stylus_disable_pads[] = {
+	/* F13 : SOC_PEN_DETECT_R_ODL */
+	PAD_NC_LOCK(GPP_F13, NONE, LOCK_CONFIG),
+	/* F15 : SOC_PEN_DETECT_ODL */
+	PAD_NC_LOCK(GPP_F15, NONE, LOCK_CONFIG),
+};
+
 void fw_config_gpio_padbased_override(struct pad_config *padbased_table)
 {
    if (!fw_config_probe(FW_CONFIG(DB_USB, DB_HDMI_LTE))
@@ -44,4 +51,10 @@
    	gpio_padbased_override(padbased_table, lte_disable_pads,
    					ARRAY_SIZE(lte_disable_pads));
    }
+
+	if (fw_config_probe(FW_CONFIG(STYLUS, STYLUS_ABSENT))) {
+		printk(BIOS_INFO, "Disable Stylus GPIO pins.\n");
+		gpio_padbased_override(padbased_table, stylus_disable_pads,
+						ARRAY_SIZE(stylus_disable_pads));
+	}
 }
diff --git a/src/mainboard/google/brya/variants/guren/gpio.c b/src/mainboard/google/brya/variants/guren/gpio.c
index 0c46265..b5017c6 100644
--- a/src/mainboard/google/brya/variants/guren/gpio.c
+++ b/src/mainboard/google/brya/variants/guren/gpio.c
@@ -26,10 +26,6 @@
    PAD_CFG_GPI(GPP_E5, NONE, DEEP),
    /* F12 : WWAN_RST_L */
    PAD_CFG_GPO_LOCK(GPP_F12, 1, LOCK_CONFIG),
-	/* F13 : GSXSLOAD ==> NC */
-	PAD_NC_LOCK(GPP_F13, NONE, LOCK_CONFIG),
-	/* F15 : GSXSRESET# ==> NC */
-	PAD_NC_LOCK(GPP_F15, NONE, LOCK_CONFIG),
    /* H19 : SOC_I2C_SUB_INT_ODL */
    PAD_CFG_GPI_APIC(GPP_H19, NONE, PLTRST, LEVEL, NONE),
    /* H22 : IMGCLKOUT3 ==> NC */
diff --git a/src/mainboard/google/brya/variants/guren/overridetree.cb b/src/mainboard/google/brya/variants/guren/overridetree.cb
index 0e10689..fffb46c 100644
--- a/src/mainboard/google/brya/variants/guren/overridetree.cb
+++ b/src/mainboard/google/brya/variants/guren/overridetree.cb
@@ -21,6 +21,10 @@
    	option WIFI_SAR_ID_INTEL_CONVERTIBLE		 0
    	option WIFI_SAR_ID_INTEL_CLAMSHELL		 1
    end
+	field STYLUS 15
+		option STYLUS_ABSENT		0
+		option STYLUS_PRESENT		1
+	end
    field WFC 17 18
    	option WFC_ABSENT		0
    	option WFC_PRESENT		1
@@ -369,6 +373,21 @@
    				probe TOUCHSCREEN_SOURCE TOUCHSCREEN_ILIT2901
    			end
    		end
+
+			chip drivers/generic/gpio_keys
+				register "name" = ""PENH""
+				register "gpio" = "ACPI_GPIO_INPUT_ACTIVE_LOW(GPP_F13)"
+				register "key.wake_gpe" = "GPE0_DW2_15"
+				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
+					probe STYLUS STYLUS_PRESENT
+				end
+			end
    	end #I2C1
    	device ref i2c2 on
    		chip drivers/i2c/sx9324