From 1037e341233a7ac87dbaf9e2544571b892a3262c Mon Sep 17 00:00:00 2001
From: Mathew King <mathewk@chromium.org>
Date: Wed, 24 Feb 2021 14:36:54 -0700
Subject: [PATCH] mb/google/guybrush: Add option to toggle GPIO for sign of
 life

Enabling the GPIO_SIGN_OF_LIFE option will allow for early boot testing.

BUG=b:180721202
TEST=builds

Change-Id: I069623ae76a4e4d1e43a47dd95fdfcece398ebfb
Signed-off-by: Mathew King <mathewk@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51069
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: EricR Lai <ericr_lai@compal.corp-partner.google.com>
---
 src/mainboard/google/guybrush/Kconfig     |  7 +++++++
 src/mainboard/google/guybrush/bootblock.c | 12 ++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/src/mainboard/google/guybrush/Kconfig b/src/mainboard/google/guybrush/Kconfig
index bd4848ca88..46e8a5ab32 100644
--- a/src/mainboard/google/guybrush/Kconfig
+++ b/src/mainboard/google/guybrush/Kconfig
@@ -55,4 +55,11 @@ config MAINBOARD_FAMILY
 	string
 	default "Google_Guybrush"
 
+config GPIO_SIGN_OF_LIFE
+	def_bool n
+	help
+	  Enable toggling GPIO 31 as a sign of life on Guybrush
+
+	  TODO: Remove this option when board is booting
+
 endif # BOARD_GOOGLE_BASEBOARD_GUYBRUSH
diff --git a/src/mainboard/google/guybrush/bootblock.c b/src/mainboard/google/guybrush/bootblock.c
index d7a30b0d11..5eacd0b9d0 100644
--- a/src/mainboard/google/guybrush/bootblock.c
+++ b/src/mainboard/google/guybrush/bootblock.c
@@ -2,6 +2,9 @@
 
 #include <bootblock_common.h>
 #include <baseboard/variants.h>
+#include <delay.h>
+#include <gpio.h>
+#include <soc/gpio.h>
 
 void bootblock_mainboard_early_init(void)
 {
@@ -10,4 +13,13 @@ void bootblock_mainboard_early_init(void)
 
 	gpios = variant_bootblock_gpio_table(&num_gpios);
 	program_gpios(gpios, num_gpios);
+
+	if (CONFIG(GPIO_SIGN_OF_LIFE)) {
+		for (int x = 0; x < 20; x++) {
+			gpio_set(GPIO_31, 1);
+			mdelay(10);
+			gpio_set(GPIO_31, 0);
+			mdelay(10);
+		}
+	}
 }