From dcf403e43a5c20b8684801f9b1e01cc6770ab65e Mon Sep 17 00:00:00 2001
From: Wen Zhang <zhangwen6@huaqin.corp-partner.google.com>
Date: Fri, 7 Mar 2025 14:37:05 +0800
Subject: [PATCH] mb/google/skywalker: Configure fingerprint pins

There is no powering-on control in the fingerprint kernel driver.
Follow Rauru to power-on FP MCU in the FW.

BUG=b:401396071
BRANCH=none
TEST=ectool --name=cros_fp version can get the FP FW version.

Signed-off-by: Haikun Zhou <zhouhaikun5@huaqin.corp-partner.google.com>
Change-Id: I20ff175ee4874c4188b7d07ee57330a9275dcb3d
Reviewed-on: https://review.coreboot.org/c/coreboot/+/87852
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Reviewed-by: Yidi Lin <yidilin@google.com>
---
 src/mainboard/google/skywalker/chromeos.c  | 3 +++
 src/mainboard/google/skywalker/gpio.h      | 3 +++
 src/mainboard/google/skywalker/mainboard.c | 9 +++++++++
 3 files changed, 15 insertions(+)

diff --git a/src/mainboard/google/skywalker/chromeos.c b/src/mainboard/google/skywalker/chromeos.c
index 02abb5f899..c5b9f8ee16 100644
--- a/src/mainboard/google/skywalker/chromeos.c
+++ b/src/mainboard/google/skywalker/chromeos.c
@@ -28,6 +28,9 @@ void setup_chromeos_gpios(void)
 	gpio_output(GPIO_XHCI_INIT_DONE, 0);
 	gpio_output(GPIO_AP_SUSPEND_L, 1);
 	gpio_output(GPIO_AP_HDMI_RST_ODL, 0);
+	gpio_output(GPIO_AP_FP_FW_UP_STRAP, 0);
+	gpio_output(GPIO_EN_PWR_FP, 0);
+	gpio_output(GPIO_FP_RST_1V8_S3_L, 0);
 }
 
 void fill_lb_gpios(struct lb_gpios *gpios)
diff --git a/src/mainboard/google/skywalker/gpio.h b/src/mainboard/google/skywalker/gpio.h
index 5bd8744126..8a1925a635 100644
--- a/src/mainboard/google/skywalker/gpio.h
+++ b/src/mainboard/google/skywalker/gpio.h
@@ -11,6 +11,9 @@
 #define GPIO_AP_EC_WARM_RST_REQ		GPIO(GBE_AUX_PPS0)
 #define GPIO_GSC_AP_INT_ODL		GPIO(GBE_AUX_PPS1)
 #define GPIO_AP_SUSPEND_L		GPIO(CONN_TOP_DATA)
+#define GPIO_FP_RST_1V8_S3_L		GPIO(GBE_RXER)
+#define GPIO_AP_FP_FW_UP_STRAP		GPIO(GBE_TXER)
+#define GPIO_EN_PWR_FP			GPIO(GPIO12)
 #define GPIO_HP_INT_ODL			GPIO(GPIO04)
 #define GPIO_SPKR_INT_ODL		GPIO(GPIO08)
 #define GPIO_SAR_INT_ODL		GPIO(GPIO09)
diff --git a/src/mainboard/google/skywalker/mainboard.c b/src/mainboard/google/skywalker/mainboard.c
index 686fd55e2e..af27c8268c 100644
--- a/src/mainboard/google/skywalker/mainboard.c
+++ b/src/mainboard/google/skywalker/mainboard.c
@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only OR MIT */
 
 #include <device/device.h>
+#include <gpio.h>
 #include <soc/bl31.h>
 #include <soc/dpm_v2.h>
 #include <soc/spm_common.h>
@@ -8,11 +9,19 @@
 
 #include "gpio.h"
 
+static void power_on_fpmcu(void)
+{
+	/* Power on the fingerprint MCU */
+	gpio_output(GPIO_EN_PWR_FP, 1);
+	gpio_output(GPIO_FP_RST_1V8_S3_L, 1);
+}
+
 static void mainboard_init(struct device *dev)
 {
 	dpm_init();
 	setup_usb_host();
 	spm_init();
+	power_on_fpmcu();
 
 	if (CONFIG(ARM64_USE_ARM_TRUSTED_FIRMWARE))
 		register_reset_to_bl31(GPIO_AP_EC_WARM_RST_REQ.id, true);