[coreboot-gerrit] [S] Change in coreboot[main]: ec/google/chromeec: Implement early power off

[Subrata Banik (Code Review)]

Subrata Banik has submitted this change. ( https://review.coreboot.org/c/coreboot/+/86337?usp=email )

(

5 is the latest approved patch-set.
No files were changed between the latest approved patch-set and the submitted one.
 )Change subject: ec/google/chromeec: Implement early power off
......................................................................

ec/google/chromeec: Implement early power off

This commit implements the `google_chromeec_do_early_poweroff`
function for the Chrome EC. This allows the system to power
off before memory initialization by triggering an EC reset
with EC_REBOOT_COLD_AP_OFF.

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

Change-Id: Ia53469feb2a020b38a5414728159b09c86c7e32d
Signed-off-by: Subrata Banik 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/86337
Reviewed-by: Karthik Ramasubramanian 
Tested-by: build bot (Jenkins) 
Reviewed-by: Caveh Jalali 
---
M src/ec/google/chromeec/ec.c
M src/ec/google/chromeec/ec.h
2 files changed, 15 insertions(+), 0 deletions(-)

Approvals:
  Karthik Ramasubramanian: Looks good to me, approved
  build bot (Jenkins): Verified
  Caveh Jalali: Looks good to me, but someone else must approve

diff --git a/src/ec/google/chromeec/ec.c b/src/ec/google/chromeec/ec.c
index 2e8961f..cc581ff 100644
--- a/src/ec/google/chromeec/ec.c
+++ b/src/ec/google/chromeec/ec.c
@@ -8,6 +8,7 @@
 #include <device/device.h>
 #include <device/path.h>
 #include <elog.h>
+#include <halt.h>
 #include <rtc.h>
 #include <security/vboot/vboot_common.h>
 #include <stdlib.h>
@@ -1669,3 +1670,9 @@

return false;
 }
+
+void google_chromeec_do_early_poweroff(void)
+{
+	google_chromeec_reboot(EC_REBOOT_COLD_AP_OFF, 0);
+	halt();
+}
diff --git a/src/ec/google/chromeec/ec.h b/src/ec/google/chromeec/ec.h
index b11b7a8..08d4f27 100644
--- a/src/ec/google/chromeec/ec.h
+++ b/src/ec/google/chromeec/ec.h
@@ -471,6 +471,14 @@
  */
 bool google_chromeec_is_battery_present(void);

+/*
+ * Performs early power off.
+ *
+ * This function handles the necessary steps to initiate an early power off
+ * sequence.
+ */
+void google_chromeec_do_early_poweroff(void);
+
 /**
  * Determine if the UCSI stack is currently active.
  *