[S] Change in coreboot[main]: soc/intel/common: Add low battery shutdown function

[Subrata Banik (Code Review)]

Subrata Banik has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/86361?usp=email )

Change subject: soc/intel/common: Add low battery shutdown function
......................................................................

soc/intel/common: Add low battery shutdown function

This commit adds a `do_low_battery_shutdown()` function to handle system
shutdown due to critically low battery levels.

The function logs a low battery event, introduces a short delay for
logging, and then initiates a power off sequence.

This provides a standardized way to handle low battery shutdowns across
platforms.

BUG=b:339673254
TEST=Able to build and boot google/brox.

Change-Id: I92e9003c70c2608770972f1a302f954ebdf17bc4
Signed-off-by: Subrata Banik 
---
M src/include/reset.h
M src/soc/intel/common/reset.c
2 files changed, 23 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/61/86361/1

diff --git a/src/include/reset.h b/src/include/reset.h
index 95fe066..be3460a 100644
--- a/src/include/reset.h
+++ b/src/include/reset.h
@@ -41,4 +41,16 @@
  */
 void do_board_reset(void);

+/*
+ * Issue shutdown due to low battery
+ *
+ * Call this function to power off the platform if the battery level is critically low.
+ * It performs the following actions:
+ *
+ * 1. Logs an event indicating a low battery shutdown.
+ * 2. Introduces a short delay to allow time for logging.
+ * 3. Sends a shutdown command.
+ */
+void do_low_battery_shutdown(void);
+
 #endif
diff --git a/src/soc/intel/common/reset.c b/src/soc/intel/common/reset.c
index c6c394b..6ee4c10 100644
--- a/src/soc/intel/common/reset.c
+++ b/src/soc/intel/common/reset.c
@@ -3,6 +3,8 @@
 #include <arch/cache.h>
 #include <cf9_reset.h>
 #include <console/console.h>
+#include <delay.h>
+#include <elog.h>
 #include <halt.h>
 #include <reset.h>

@@ -21,3 +23,12 @@
 {
    full_reset();
 }
+
+void do_low_battery_shutdown(void)
+{
+	elog_add_event_byte(ELOG_TYPE_LOW_BATTERY_INDICATOR, ELOG_FW_ISSUE_SHUTDOWN);
+
+	delay(3);
+
+	poweroff();
+}