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Thu, 30 Jan 2020 08:13:10 -0800 Received: from [10.140.9.2] (helo=xhdbharatku40.xilinx.com) by xsj-pvapsmtp01 with esmtp (Exim 4.63) (envelope-from ) id 1ixCRE-0005mP-Ct; Thu, 30 Jan 2020 08:13:04 -0800 From: Bharat Kumar Gogada To: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Cc: bhelgaas@google.com, rgummal@xilinx.com, Bharat Kumar Gogada Subject: [PATCH v5 1/2] PCI: xilinx-cpm: Add device tree binding for Versal CPM host bridge Date: Thu, 30 Jan 2020 21:42:50 +0530 Message-Id: <1580400771-12382-2-git-send-email-bharat.kumar.gogada@xilinx.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1580400771-12382-1-git-send-email-bharat.kumar.gogada@xilinx.com> References: <1580400771-12382-1-git-send-email-bharat.kumar.gogada@xilinx.com> X-TM-AS-Product-Ver: IMSS-7.1.0.1224-8.2.0.1013-23620.005 X-TM-AS-User-Approved-Sender: Yes;Yes X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-Forefront-Antispam-Report: CIP:149.199.60.83;IPV:;CTRY:US;EFV:NLI;SFV:NSPM;SFS:(10009020)(4636009)(376002)(346002)(136003)(396003)(39860400002)(189003)(199004)(336012)(186003)(2906002)(81166006)(8936002)(5660300002)(81156014)(316002)(2616005)(36756003)(26005)(107886003)(70586007)(6666004)(356004)(4326008)(9786002)(478600001)(426003)(7696005)(8676002)(70206006);DIR:OUT;SFP:1101;SCL:1;SRVR:BN6PR02MB3137;H:xsj-pvapsmtpgw01;FPR:;SPF:Pass;LANG:en;PTR:unknown-60-83.xilinx.com;MX:1;A:1; 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Signed-off-by: Bharat Kumar Gogada --- .../devicetree/bindings/pci/xilinx-versal-cpm.txt | 66 ++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 Documentation/devicetree/bindings/pci/xilinx-versal-cpm.txt diff --git a/Documentation/devicetree/bindings/pci/xilinx-versal-cpm.txt b/Documentation/devicetree/bindings/pci/xilinx-versal-cpm.txt new file mode 100644 index 0000000..35f8556 --- /dev/null +++ b/Documentation/devicetree/bindings/pci/xilinx-versal-cpm.txt @@ -0,0 +1,66 @@ +* Xilinx Versal CPM DMA Root Port Bridge DT description + +Required properties: +- #address-cells: Address representation for root ports, set to <3> +- #size-cells: Size representation for root ports, set to <2> +- #interrupt-cells: specifies the number of cells needed to encode an + interrupt source. The value must be 1. +- compatible: Should contain "xlnx,versal-cpm-host-1.00" +- reg: Should contain configuration space (includes bridge registers) and + CPM system level control and status registers, and length +- reg-names: Must include the following entries: + "cfg": configuration space region and bridge registers + "cpm_slcr": CPM system level control and status registers +- interrupts: Should contain AXI PCIe interrupt +- interrupt-map-mask, + interrupt-map: standard PCI properties to define the mapping of the + PCI interface to interrupt numbers. +- ranges: ranges for the PCI memory regions (I/O space region is not + supported by hardware) + Please refer to the standard PCI bus binding document for a more + detailed explanation +- msi-map: Maps a Requester ID to an MSI controller and associated MSI + sideband data +- interrupt-names: Must include the following entries: + "misc": interrupt asserted when legacy or error interrupt is received + +Interrupt controller child node ++++++++++++++++++++++++++++++++ +Required properties: +- interrupt-controller: identifies the node as an interrupt controller +- #address-cells: specifies the number of cells needed to encode an + address. The value must be 0. +- #interrupt-cells: specifies the number of cells needed to encode an + interrupt source. The value must be 1. + + +Refer to the following binding document for more detailed description on +the use of 'msi-map': + Documentation/devicetree/bindings/pci/pci-msi.txt + +Example: + pci@fca10000 { + #address-cells = <3>; + #interrupt-cells = <1>; + #size-cells = <2>; + compatible = "xlnx,versal-cpm-host-1.00"; + interrupt-map = <0 0 0 1 &pcie_intc_0 1>, + <0 0 0 2 &pcie_intc_0 2>, + <0 0 0 3 &pcie_intc_0 3>, + <0 0 0 4 &pcie_intc_0 4>; + interrupt-map-mask = <0 0 0 7>; + interrupt-parent = <&gic>; + interrupt-names = "misc"; + interrupts = <0 72 4>; + ranges = <0x02000000 0x00000000 0xE0000000 0x0 0xE0000000 0x00000000 0x10000000>, + <0x43000000 0x00000080 0x00000000 0x00000080 0x00000000 0x00000000 0x80000000>; + msi-map = <0x0 &its_gic 0x0 0x10000>; + reg = <0x6 0x00000000 0x0 0x1000000>, + <0x0 0xFCA10000 0x0 0x1000>; + reg-names = "cfg", "cpm_slcr"; + pcie_intc_0: pci-interrupt-controller { + #address-cells = <0>; + #interrupt-cells = <1>; + interrupt-controller ; + }; + };