ec/google/chromeec: Add retimer handle to Type C conn

Some platforms have retimers which can be configured via the EC. Add a
handle to these retimer devices to the Type C connector device, using
devicetree references.

BUG=b:208883648
TEST=Verify disassembled SSDT on brya.
BRANCH=None

Signed-off-by: Prashant Malani <pmalani@chromium.org>
Change-Id: Ic0480b08c6d6a7562cca57192e49b8ea2a33b51e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63793
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/acpi/acpigen_usb.c

@@ -106,6 +106,7 @@ static void add_device_references(struct acpi_dp *dsd,
 	add_device_ref(dsd, "orientation-switch", config->orientation_switch);
 	add_device_ref(dsd, "usb-role-switch", config->usb_role_switch);
 	add_device_ref(dsd, "mode-switch", config->mode_switch);
+	add_device_ref(dsd, "retimer-switch", config->retimer_switch);
 }
 
 void acpigen_write_typec_connector(const struct typec_connector_class_config *config,

src/ec/google/chromeec/chip.h

@@ -11,6 +11,7 @@
 struct ec_google_chromeec_config {
 	/* Pointer to PMC Mux connector for each Type-C port */
 	DEVTREE_CONST struct device *mux_conn[MAX_TYPEC_PORTS];
+	DEVTREE_CONST struct device *retimer_conn[MAX_TYPEC_PORTS];
 };
 
 #endif /* EC_GOOGLE_CHROMEEC_CHIP_H */

src/ec/google/chromeec/ec_acpi.c

@@ -195,6 +195,7 @@ static void fill_ssdt_typec_device(const struct device *dev)
 			.orientation_switch = config->mux_conn[i],
 			.usb_role_switch = config->mux_conn[i],
 			.mode_switch = config->mux_conn[i],
+			.retimer_switch = config->retimer_conn[i],
 			.pld = &pld,
 		};
 

src/include/acpi/acpigen_usb.h

@@ -41,6 +41,8 @@ enum usb_typec_data_role {
  *	host or device, for the USB port
  * @mode_switch: Reference to the ACPI device that controls routing of data lines to
  *	various endpoints (xHCI, DP, etc.) on the SoC.
+ * @retimer_switch: Reference to the ACPI device that controls the configuration
+ * of the retimer in the Type C signal chain.
  * @pld: Reference to PLD information.
  */
 struct typec_connector_class_config {
@@ -53,6 +55,7 @@ struct typec_connector_class_config {
 	const struct device *orientation_switch;
 	const struct device *usb_role_switch;
 	const struct device *mode_switch;
+	const struct device *retimer_switch;
 	const struct acpi_pld *pld;
 };