[S] Change in coreboot[main]: vc/google/chromeos: Implement platform callback for critical shutdown

[Subrata Banik (Code Review)]

Subrata Banik has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/86228?usp=email )

Change subject: vc/google/chromeos: Implement platform callback for critical shutdown
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vc/google/chromeos: Implement platform callback for critical shutdown

This commit implements the platform_is_critical_shutdown_needed callback
for ChromeOS.  It checks the Chrome EC for a critically low battery
condition. If detected, a short delay is introduced before logging a
low battery event and initiating a system poweroff using the
poweroff() function. This ensures a clean shutdown due to low battery.

BUG=b:339673254
TEST=Verified low battery boot event logging and controlled shutdown.

Change-Id: I119f80a45c045a6095cae98f179c755a2e948e9c
Signed-off-by: Subrata Banik 
---
M src/vendorcode/google/chromeos/splash.c
1 file changed, 14 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/28/86228/1

diff --git a/src/vendorcode/google/chromeos/splash.c b/src/vendorcode/google/chromeos/splash.c
index 0c7cba7..8925721 100644
--- a/src/vendorcode/google/chromeos/splash.c
+++ b/src/vendorcode/google/chromeos/splash.c
@@ -2,8 +2,22 @@

#include <bootsplash.h>
 #include <ec/google/chromeec/ec.h>
+#include <elog.h>
+#include <fsp/api.h>
+#include <delay.h>
+#include <halt.h>
 #include <vendorcode/google/chromeos/chromeos.h>

+void platform_is_critical_shutdown_needed(void)
+{
+	if (CONFIG(EC_GOOGLE_CHROMEEC) && google_chromeec_is_below_critical_threshold()) {
+		/* Allow user to notice the low battery indicator before poweroff */
+		delay(3);
+		elog_add_event_byte(ELOG_TYPE_LOW_BATTERY_INDICATOR, ELOG_FW_ISSUE_SHUTDOWN);
+		poweroff();
+	}
+}
+
 static bool chromeos_render_low_battery_logo(void)
 {
    if (!CONFIG(CHROMEOS_LOW_BATTERY_INDICATOR_SCREEN) || !CONFIG(EC_GOOGLE_CHROMEEC))