1*2959ab24SNipun Gupta# SPDX-License-Identifier: GPL-2.0 2*2959ab24SNipun Gupta# 3*2959ab24SNipun Gupta# CDX bus configuration 4*2959ab24SNipun Gupta# 5*2959ab24SNipun Gupta# Copyright (C) 2022-2023, Advanced Micro Devices, Inc. 6*2959ab24SNipun Gupta# 7*2959ab24SNipun Gupta 8*2959ab24SNipun Guptaconfig CDX_BUS 9*2959ab24SNipun Gupta bool "CDX Bus driver" 10*2959ab24SNipun Gupta depends on OF && ARM64 11*2959ab24SNipun Gupta help 12*2959ab24SNipun Gupta Driver to enable Composable DMA Transfer(CDX) Bus. CDX bus 13*2959ab24SNipun Gupta exposes Fabric devices which uses composable DMA IP to the 14*2959ab24SNipun Gupta APU. CDX bus provides a mechanism for scanning and probing 15*2959ab24SNipun Gupta of CDX devices. CDX devices are memory mapped on system bus 16*2959ab24SNipun Gupta for embedded CPUs. CDX bus uses CDX controller and firmware 17*2959ab24SNipun Gupta to scan these CDX devices. 18