[coreboot-gerrit] Change in coreboot[master]: ec/google/chromeec: Provide EC access path for Retimer firmware update

[John Zhao (Code Review)]

John Zhao has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/49257 )

Change subject: ec/google/chromeec: Provide EC access path for Retimer firmware update
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ec/google/chromeec: Provide EC access path for Retimer firmware update

Kernel needs to access EC RFWU entry in order to retrieve from EC about
port and mux info and set EC operations like modes change. This change
provides EC RFWU path for Retimer driver usage.

BUG=b:162528867
TEST=Booted to kernel and verified EC RFWU path from ACPI SSDT table.

Signed-off-by: John Zhao 
Change-Id: I3817d93cfdeedf15825dab6c537b151fd063338b
---
M src/ec/google/chromeec/ec_acpi.c
1 file changed, 6 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/57/49257/1

diff --git a/src/ec/google/chromeec/ec_acpi.c b/src/ec/google/chromeec/ec_acpi.c
index fff3954..d777d1b 100644
--- a/src/ec/google/chromeec/ec_acpi.c
+++ b/src/ec/google/chromeec/ec_acpi.c
@@ -7,6 +7,7 @@
 #include <acpi/acpigen_usb.h>
 #include <console/console.h>
 #include <drivers/usb/acpi/chip.h>
+#include <drivers/intel/usb4/retimer/retimer.h>
 #include <ec/google/common/dptf.h>

#include "chip.h"
@@ -235,3 +236,8 @@
    fill_ssdt_typec_device(dev);
    fill_ssdt_ps2_keyboard(dev);
 }
+
+const char *mainboard_retimer_fw_update_path(void)
+{
+	return "\_SB_.PCI0.LPCB.EC0_.RFWU";
+}