linux-kernel - [PATCH 5/8] dt-bindings: PCI: Add Amazon's Annapurna Labs PCIe host bridge binding

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Message-ID: <20190710164519.17883-6-jonnyc@amazon.com>
Date:   Thu, 11 Jul 2019 17:45:41 +0300
From:   Jonathan Chocron <jonnyc@...zon.com>
To:     <lorenzo.pieralisi@....com>, <bhelgaas@...gle.com>,
        <jingoohan1@...il.com>, <gustavo.pimentel@...opsys.com>,
        <robh+dt@...nel.org>, <mark.rutland@....com>
CC:     <dwmw@...zon.co.uk>, <benh@...nel.crashing.org>,
        <alisaidi@...zon.com>, <ronenk@...zon.com>, <barakw@...zon.com>,
        <talel@...zon.com>, <hanochu@...zon.com>, <hhhawa@...zon.com>,
        <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <jonnyc@...zon.com>
Subject: [PATCH 5/8] dt-bindings: PCI: Add Amazon's Annapurna Labs PCIe host
 bridge binding

Document Amazon's Annapurna Labs PCIe host bridge.

Signed-off-by: Jonathan Chocron <jonnyc@...zon.com>
---
 .../devicetree/bindings/pci/pcie-al.txt       | 45 +++++++++++++++++++
 MAINTAINERS                                   |  1 +
 2 files changed, 46 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/pcie-al.txt

diff --git a/Documentation/devicetree/bindings/pci/pcie-al.txt b/Documentation/devicetree/bindings/pci/pcie-al.txt
new file mode 100644
index 000000000000..d92cc529490e
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/pcie-al.txt
@@ -0,0 +1,45 @@
+* Amazon Annapurna Labs PCIe host bridge
+
+Annapurna Labs' PCIe Host Controller is based on the Synopsys DesignWare
+PCI core.
+It shares common functions with the PCIe DesignWare core driver and inherits
+common properties defined in Documentation/devicetree/bindings/pci/designware-pcie.txt.
+Properties of the host controller node that differ from it are:
+
+- compatible:
+	Usage: required
+	Value type: <stringlist>
+	Definition: Value should contain
+			- "amazon,al-pcie"
+
+- reg:
+	Usage: required
+	Value type: <prop-encoded-array>
+	Definition: Register ranges as listed in the reg-names property
+
+- reg-names:
+	Usage: required
+	Value type: <stringlist>
+	Definition: Must include the following entries
+			- "config"	PCIe ECAM space
+			- "controller"	AL proprietary registers
+			- "dbi"		Designware PCIe registers
+
+Example:
+
+	pcie-external0 {
+		compatible = "amazon,al-pcie";
+		reg = <0x0 0xfb600000 0x0 0x00100000
+		       0x0 0xfd800000 0x0 0x00010000
+		       0x0 0xfd810000 0x0 0x00001000>;
+		reg-names = "config", "controller", "dbi";
+		bus-range = <0 255>;
+		device_type = "pci";
+		#address-cells = <3>;
+		#size-cells = <2>;
+		#interrupt-cells = <1>;
+		interrupts = <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-map-mask = <0x00 0 0 7>;
+		interrupt-map = <0x0000 0 0 1 &gic_main GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>; /* INTa */
+		ranges = <0x02000000 0x0 0xc0010000 0x0 0xc0010000 0x0 0x07ff0000>;
+	};
diff --git a/MAINTAINERS b/MAINTAINERS
index 5a6137df3f0e..d555beb794bb 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -12205,6 +12205,7 @@ PCIE DRIVER FOR ANNAPURNA LABS
 M:	Jonathan Chocron <jonnyc@...zon.com>
 L:	linux-pci@...r.kernel.org
 S:	Maintained
+F:	Documentation/devicetree/bindings/pci/pcie-al.txt
 F:	drivers/pci/controller/dwc/pcie-al.c
 
 PCIE DRIVER FOR AMLOGIC MESON
-- 
2.17.1