[coreboot-gerrit] Change in ...coreboot[master]: vendorcode/google/chromeos: Add mainboard hook before cr50 update

[Duncan Laurie (Code Review)]

Duncan Laurie has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/31057

Change subject: vendorcode/google/chromeos: Add mainboard hook before cr50 update
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vendorcode/google/chromeos: Add mainboard hook before cr50 update

In order to allow the mainboard to configure the system before a
cr50 initiated update reset add a weak function that the mainboard
can override if necessary.

This will allow a board that would otherwise be configured to
stay off after an EC reset to instead power up after the reset and
not end up in a shut down state after a cr50 update.

BUG=b:121380403
TEST=update cr50 firmware on sarien and reboot

Change-Id: I11f9e8c9bfe810f69b4eaa2c633252c25004cbd0
Signed-off-by: Duncan Laurie 
---
M src/vendorcode/google/chromeos/chromeos.h
M src/vendorcode/google/chromeos/cr50_enable_update.c
2 files changed, 9 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/57/31057/1

diff --git a/src/vendorcode/google/chromeos/chromeos.h b/src/vendorcode/google/chromeos/chromeos.h
index df61596..f7e2ae9 100644
--- a/src/vendorcode/google/chromeos/chromeos.h
+++ b/src/vendorcode/google/chromeos/chromeos.h
@@ -33,6 +33,9 @@
 static inline void reboot_from_watchdog(void) { return; }
 #endif /* CONFIG_CHROMEOS */

+/* Defined as weak function in cr50_enable_update.c */
+void mainboard_cr50_update_reset(void);
+
 struct romstage_handoff;

#include "gnvs.h"
diff --git a/src/vendorcode/google/chromeos/cr50_enable_update.c b/src/vendorcode/google/chromeos/cr50_enable_update.c
index 06416bd..da9a16d 100644
--- a/src/vendorcode/google/chromeos/cr50_enable_update.c
+++ b/src/vendorcode/google/chromeos/cr50_enable_update.c
@@ -21,6 +21,9 @@
 #include <security/tpm/tss.h>
 #include <vb2_api.h>
 #include <security/vboot/vboot_common.h>
+#include <vendorcode/google/chromeos/chromeos.h>
+
+void __weak mainboard_cr50_update_reset(void) {}

static void enable_update(void *unused)
 {
@@ -52,6 +55,9 @@
    if (!num_restored_headers)
    	return;

+	/* Give mainboard a chance to take action */
+	mainboard_cr50_update_reset();
+
    elog_add_event(ELOG_TYPE_CR50_UPDATE);

/* clear current post code avoid chatty eventlog on subsequent boot*/