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ec/google/chromeec: Implement early power off

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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 <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/86337
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Caveh Jalali <caveh@chromium.org>
This commit is contained in:
Subrata Banik 2025-02-09 07:53:42 +00:00
commit 46f38d05d6
2 changed files with 15 additions and 0 deletions
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7
src/ec/google/chromeec/ec.c
View file

@ -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 @@ bool google_chromeec_is_battery_present(void)
return false;
}
void google_chromeec_do_early_poweroff(void)
{
google_chromeec_reboot(EC_REBOOT_COLD_AP_OFF, 0);
halt();
}

8
src/ec/google/chromeec/ec.h
View file

@ -471,6 +471,14 @@ bool google_chromeec_is_below_critical_threshold(void);
*/
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.
*