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# Copyright 2022 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
description: USB-C muxes chain
compatible: "cros-ec,usb-mux-chain"
properties:
usb-muxes:
type: phandles
required: true
description: |
List of USB-C muxes and retimers for the USB-C port. The USB-C subsystem
traverses this list in the order specified. The phandles are references to
cros-ec,usbc-mux nodes. Link this mux chain with a specific USB-C port by
adding the "cros-ec,usb-mux-chain" as a child of the "named-usbc-port"
node.
alternative-chain:
type: boolean
description: |
Set if this is alternative USB-C muxes chain. It can be selected in
runtime using USB_MUX_ENABLE_ALTERNATIVE macro.
# Example DTS defining USB-C port 0 with main and alternative usb mux chains.
# The main chain has two muxes: BB retimer and virtual mux.
# The alternative chain has three muxes: BB retimer, SOC side BB retimer and
# virtual mux.
#
# usbc_port0: port0@0 {
# compatible = "named-usbc-port";
# reg = <0>;
# ...
# usb-mux-chain-0 {
# compatible = "cros-ec,usb-mux-chain";
# usb-muxes = <&usb_c0_bb_retimer
# &virtual_mux_c0>;
# };
# usb-mux-chain-0 {
# compatible = "cros-ec,usb-mux-chain";
# alternative-chain;
# usb-muxes = <&usb_c0_bb_retimer
# &usb_c0_soc_side_bb_retimer
# &virtual_mux_c0>;
# };
# };
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