mb/google/brya: Add EC smihandler

Add implementation of EC smihandler

BUG=b:174266035
TEST=Build Test

Signed-off-by: Eric Lai <ericr_lai@compal.corp-partner.google.com>
Change-Id: I211f5755ff44514ab7ab4083f684ddd88c23fe48
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48115
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/brya/Makefile.inc

@@ -9,6 +9,8 @@ ramstage-$(CONFIG_CHROMEOS) += chromeos.c
 ramstage-y += mainboard.c
 ramstage-y += ec.c
 
+smm-$(CONFIG_HAVE_SMI_HANDLER) += smihandler.c
+
 VARIANT_DIR:=$(call strip_quotes,$(CONFIG_VARIANT_DIR))
 
 subdirs-y += variants/baseboard

src/mainboard/google/brya/smihandler.c

@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <cpu/x86/smm.h>
+#include <ec/google/chromeec/ec.h>
+#include <ec/google/chromeec/smm.h>
+#include <elog.h>
+#include <intelblocks/smihandler.h>
+#include <variant/ec.h>
+
+void mainboard_smi_sleep(u8 slp_typ)
+{
+	chromeec_smi_sleep(slp_typ, MAINBOARD_EC_S3_WAKE_EVENTS, MAINBOARD_EC_S5_WAKE_EVENTS);
+}
+
+int mainboard_smi_apmc(u8 apmc)
+{
+	chromeec_smi_apmc(apmc, MAINBOARD_EC_SCI_EVENTS, MAINBOARD_EC_SMI_EVENTS);
+	return 0;
+}
+
+void elog_gsmi_cb_mainboard_log_wake_source(void)
+{
+	google_chromeec_log_events(MAINBOARD_EC_LOG_EVENTS | MAINBOARD_EC_S0IX_WAKE_EVENTS);
+}
+
+void mainboard_smi_espi_handler(void)
+{
+	chromeec_smi_process_events();
+}