linux-kernel - [RFC PATCH 01/21] dt-bindings: PCI: Endpoint: Add DT bindings for PCI EPF Bus

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Message-ID: <20190926112933.8922-2-kishon@ti.com>
Date:   Thu, 26 Sep 2019 16:59:13 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Jonathan Corbet <corbet@....net>,
        Rob Herring <robh+dt@...nel.org>, Jon Mason <jdmason@...zu.us>,
        Dave Jiang <dave.jiang@...el.com>,
        Allen Hubbe <allenbh@...il.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>
CC:     Mark Rutland <mark.rutland@....com>, <kishon@...com>,
        <linux-pci@...r.kernel.org>, <linux-doc@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-ntb@...glegroups.com>
Subject: [RFC PATCH 01/21] dt-bindings: PCI: Endpoint: Add DT bindings for PCI EPF Bus

Add device tree bindings for PCI endpoint function bus to which
endpoint function devices should be attached.

Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
---
 .../bindings/pci/endpoint/pci-epf-bus.txt     | 27 +++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/endpoint/pci-epf-bus.txt

diff --git a/Documentation/devicetree/bindings/pci/endpoint/pci-epf-bus.txt b/Documentation/devicetree/bindings/pci/endpoint/pci-epf-bus.txt
new file mode 100644
index 000000000000..16727ddf01f5
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/endpoint/pci-epf-bus.txt
@@ -0,0 +1,27 @@
+PCI Endpoint Function Bus
+
+This describes the bindings for endpoint function bus to which endpoint
+function devices should be attached.
+
+Required Properties:
+ - compatible: Should be "pci-epf-bus"
+
+One or more subnodes representing PCIe endpoint function device exposed
+to the remote host.
+
+Example:
+Following is an example of NTB device exposed to the remote host.
+
+epf_bus {
+	compatible = "pci-epf-bus";
+
+	ntb {
+		compatible = "pci-epf-ntb";
+		epcs = <&pcie0_ep>, <&pcie1_ep>;
+		epc-names = "primary", "secondary";
+		vendor-id = /bits/ 16 <0x104c>;
+		device-id = /bits/ 16 <0xb00d>;
+		num-mws = <4>;
+		mws-size = <0x100000>, <0x100000>, <0x100000>, <0x100000>;
+	};
+};
-- 
2.17.1