linux-kernel - [v2 4/6] dt-bindings: PCI: rcar: Add bindings for R-Car PCIe endpoint controller

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Message-Id: <20191213084748.11210-5-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date:   Fri, 13 Dec 2019 08:47:46 +0000
From:   Lad Prabhakar <prabhakar.csengg@...il.com>
To:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Marek Vasut <marek.vasut+renesas@...il.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        linux-pci@...r.kernel.org
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrew Murray <andrew.murray@....com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-renesas-soc@...r.kernel.org,
        Chris Paterson <Chris.Paterson2@...esas.com>,
        Frank Rowand <frowand.list@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Jingoo Han <jingoohan1@...il.com>,
        Simon Horman <horms@...ge.net.au>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        Tom Joseph <tjoseph@...ence.com>,
        Heiko Stuebner <heiko@...ech.de>,
        linux-rockchip@...ts.infradead.org,
        "Lad, Prabhakar" <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [v2 4/6] dt-bindings: PCI: rcar: Add bindings for R-Car PCIe endpoint controller

From: "Lad, Prabhakar" <prabhakar.mahadev-lad.rj@...renesas.com>

This patch adds the bindings for the R-Car PCIe endpoint driver.

Signed-off-by: Lad, Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
---
 .../devicetree/bindings/pci/rcar-pci-ep.txt        | 37 ++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/rcar-pci-ep.txt

diff --git a/Documentation/devicetree/bindings/pci/rcar-pci-ep.txt b/Documentation/devicetree/bindings/pci/rcar-pci-ep.txt
new file mode 100644
index 0000000..7f0a97e
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/rcar-pci-ep.txt
@@ -0,0 +1,37 @@
+* Renesas R-Car PCIe Endpoint Controller DT description
+
+Required properties:
+	    "renesas,pcie-ep-r8a774c0" for the R8A774C0 SoC;
+	    "renesas,pcie-ep-rcar-gen3" for a generic R-Car Gen3 or
+				     RZ/G2 compatible device.
+
+	    When compatible with the generic version, nodes must list the
+	    SoC-specific version corresponding to the platform first
+	    followed by the generic version.
+
+- reg: base address and length of the PCIe controller registers.
+- outbound-ranges: outbound windows base address and length including the flags.
+- resets: Must contain phandles to PCIe-related reset lines exposed by IP block
+- clocks: from common clock binding: clock specifiers for the PCIe controller
+	 clock.
+- clock-names: from common clock binding: should be "pcie".
+
+Optional Property:
+- max-functions: Maximum number of functions that can be configured (default 1).
+
+Example:
+
+SoC-specific DT Entry:
+
+	pcie_ep: pcie_ep@...00000 {
+		compatible = "renesas,pcie-ep-r8a774c0", "renesas,pcie-rcar-gen2";
+		reg = <0 0xfe000000 0 0x80000>;
+		outbound-ranges = <0xa 0x0 0xfe100000 0 0x000100000
+				   0xa 0x0 0xfe200000 0 0x000200000
+				   0x6 0x0 0x30000000 0 0x008000000
+				   0x6 0x0 0x38000000 0 0x008000000>;
+		clocks = <&cpg CPG_MOD 319>;
+		clock-names = "pcie";
+		power-domains = <&sysc R8A774C0_PD_ALWAYS_ON>;
+		resets = <&cpg 319>;
+	};
-- 
2.7.4