[XS] Change in coreboot[main]: soc/intel/pantherlake: Add early power off support

[Subrata Banik (Code Review)]

Attention is currently required from: Intel coreboot Reviewers, Jayvik Desai, Kapil Porwal, Pranava Y N.

Subrata Banik has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/86358?usp=email )

Change subject: soc/intel/pantherlake: Add early power off support
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soc/intel/pantherlake: Add early power off support

This commit adds support for early power off on Panther Lake platforms.
It introduces a platform_do_early_poweroff() function which, when
PLATFORM_SUPPORTS_EARLY_POWEROFF is enabled, calls the EC's early
power off function (google_chromeec_do_early_poweroff()) if the Chrome
EC is present.

This allows for early power off scenarios on platforms that require it.

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

Change-Id: I7f53655e9aeb65b1d5646e1ebcc092b225e6e8ef
Signed-off-by: Subrata Banik 
---
M src/soc/intel/pantherlake/reset.c
1 file changed, 9 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/58/86358/1

diff --git a/src/soc/intel/pantherlake/reset.c b/src/soc/intel/pantherlake/reset.c
index bc5815a..039dba6 100644
--- a/src/soc/intel/pantherlake/reset.c
+++ b/src/soc/intel/pantherlake/reset.c
@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */

#include <cf9_reset.h>
+#include <ec/google/chromeec/ec.h>
 #include <intelblocks/cse.h>
 #include <intelblocks/pmclib.h>
 #include <soc/intel/common/reset.h>
@@ -15,3 +16,11 @@
    pmc_global_reset_enable(1);
    do_full_reset();
 }
+
+#if CONFIG(PLATFORM_SUPPORTS_EARLY_POWEROFF)
+void platform_do_early_poweroff(void)
+{
+	if (CONFIG(EC_GOOGLE_CHROMEEC))
+		google_chromeec_do_early_poweroff();
+}
+#endif