On Wed, Feb 26, 2025 at 6:43 AM Siddharth Vadapalli <s-vadapalli@xxxxxx> wrote: > > PCIe NTB (Non-Transparent-Bridge) allows connecting the memory of > multiple PCIe Hosts (Root-Complex). The number of such hosts is > determined by the number of PCIe instances configured for NTB operation > on the device which intends to enable NTB functionality. Add a device-tree > overlay to configure PCIE0 and PCIE1 instances of PCIe on J721E EVM for NTB > operation. This shall allow connecting the memory of two PCIe Hosts via > PCIE0 and PCIE1 on J721E EVM. > > Signed-off-by: Siddharth Vadapalli <s-vadapalli@xxxxxx> > --- > > v1: > https://patchwork.kernel.org/project/linux-arm-kernel/patch/20250202093636.2699064-2-s-vadapalli@xxxxxx/ > Changes since v1: > - s/epf_bus/epf-bus since node names shouldn't contain underscores. > > Regards, > Siddharth. > > arch/arm64/boot/dts/ti/Makefile | 4 + > .../boot/dts/ti/k3-j721e-evm-pcie-ntb.dtso | 91 +++++++++++++++++++ > 2 files changed, 95 insertions(+) > create mode 100644 arch/arm64/boot/dts/ti/k3-j721e-evm-pcie-ntb.dtso > > diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile > index 8a4bdf87e2d4..1097ab30f5a9 100644 > --- a/arch/arm64/boot/dts/ti/Makefile > +++ b/arch/arm64/boot/dts/ti/Makefile > @@ -102,6 +102,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-j721e-beagleboneai64.dtb > dtb-$(CONFIG_ARCH_K3) += k3-j721e-common-proc-board-infotainment.dtbo > dtb-$(CONFIG_ARCH_K3) += k3-j721e-evm.dtb > dtb-$(CONFIG_ARCH_K3) += k3-j721e-evm-gesi-exp-board.dtbo > +dtb-$(CONFIG_ARCH_K3) += k3-j721e-evm-pcie-ntb.dtbo > dtb-$(CONFIG_ARCH_K3) += k3-j721e-evm-pcie0-ep.dtbo > dtb-$(CONFIG_ARCH_K3) += k3-j721e-evm-pcie1-ep.dtbo > dtb-$(CONFIG_ARCH_K3) += k3-j721e-sk.dtb > @@ -201,6 +202,8 @@ k3-j7200-evm-pcie1-ep-dtbs := k3-j7200-common-proc-board.dtb \ > k3-j7200-evm-pcie1-ep.dtbo > k3-j721e-common-proc-board-infotainment-dtbs := k3-j721e-common-proc-board.dtb \ > k3-j721e-common-proc-board-infotainment.dtbo > +k3-j721e-evm-pcie-ntb-dtbs := k3-j721e-common-proc-board.dtb \ > + k3-j721e-evm-pcie-ntb.dtbo > k3-j721e-evm-pcie0-ep-dtbs := k3-j721e-common-proc-board.dtb \ > k3-j721e-evm-pcie0-ep.dtbo > k3-j721e-evm-pcie1-ep-dtbs := k3-j721e-common-proc-board.dtb \ > @@ -239,6 +242,7 @@ dtb- += k3-am625-beagleplay-csi2-ov5640.dtb \ > k3-am69-sk-pcie0-ep.dtb \ > k3-j7200-evm-pcie1-ep.dtb \ > k3-j721e-common-proc-board-infotainment.dtb \ > + k3-j721e-evm-pcie-ntb.dtb \ > k3-j721e-evm-pcie0-ep.dtb \ > k3-j721e-evm-pcie1-ep.dtb \ > k3-j721e-sk-csi2-dual-imx219.dtb \ > diff --git a/arch/arm64/boot/dts/ti/k3-j721e-evm-pcie-ntb.dtso b/arch/arm64/boot/dts/ti/k3-j721e-evm-pcie-ntb.dtso > new file mode 100644 > index 000000000000..9b6b3e153e91 > --- /dev/null > +++ b/arch/arm64/boot/dts/ti/k3-j721e-evm-pcie-ntb.dtso > @@ -0,0 +1,91 @@ > +// SPDX-License-Identifier: GPL-2.0-only OR MIT > +/** > + * DT Overlay for enabling NTB functionality using PCIE0 and PCIE1 instances of > + * PCIe on the J7 common processor board. > + * > + * J7 Common Processor Board Product Link: https://www.ti.com/tool/J721EXCPXEVM > + * > + * Copyright (C) 2025 Texas Instruments Incorporated - https://www.ti.com/ > + */ > + > +/dts-v1/; > +/plugin/; > + > +#include <dt-bindings/interrupt-controller/arm-gic.h> > +#include <dt-bindings/soc/ti,sci_pm_domain.h> > + > +#include "k3-pinctrl.h" > + > +&{/} { > + epf-bus { > + compatible = "pci-epf-bus"; There is no such binding upstream nor one pending. This needs to be dropped. Rob
