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@amazon.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>

diff --git a/Documentation/devicetree/bindings/pci/pcie-al.txt b/Documentation/devicetree/bindings/pci/pcie-al.txt
new file mode 100644 (file)
index 0000000..557a508
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/pcie-al.txt
@@ -0,0 +1,46 @@
+* Amazon Annapurna Labs PCIe host bridge
+
+Amazon's Annapurna Labs PCIe Host Controller is based on the Synopsys DesignWare
+PCI core. It 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-alpine-v2-pcie" for alpine_v2
+                       - "amazon,al-alpine-v3-pcie" for alpine_v3
+
+- 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: pcie@fb600000 {
+               compatible = "amazon,al-alpine-v3-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 GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>; /* INTa */
+               ranges = <0x02000000 0x0 0xc0010000 0x0 0xc0010000 0x0 0x07ff0000>;
+       };

diff --git a/MAINTAINERS b/MAINTAINERS
index 783569e3c4b48752c3555e9bee6fbc87adad5117..d200b16fa95cd2fdd55b585dbb44f64673650f88 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -12448,10 +12448,11 @@ T:    git git://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/pci.git/
 S:     Supported
 F:     drivers/pci/controller/
 
-PCIE DRIVER FOR ANNAPURNA LABS
+PCIE DRIVER FOR AMAZON ANNAPURNA LABS
 M:     Jonathan Chocron <jonnyc@amazon.com>
 L:     linux-pci@vger.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