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SubjectRe: [PATCH v7 5/6] Documentation: dt-bindings: pci: altera pcie device tree binding
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On 09/20/2015 09:13 PM, Ley Foon Tan wrote:
> This patch adds the bindings for Altera PCIe host controller driver and
> Altera PCIe MSI driver.
>
> Signed-off-by: Ley Foon Tan <lftan@altera.com>
> ---
> .../devicetree/bindings/pci/altera-pcie-msi.txt | 28 +++++++++++++
> .../devicetree/bindings/pci/altera-pcie.txt | 49 ++++++++++++++++++++++
> 2 files changed, 77 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/pci/altera-pcie-msi.txt
> create mode 100644 Documentation/devicetree/bindings/pci/altera-pcie.txt
>
> diff --git a/Documentation/devicetree/bindings/pci/altera-pcie-msi.txt b/Documentation/devicetree/bindings/pci/altera-pcie-msi.txt
> new file mode 100644
> index 0000000..53ad2388
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/altera-pcie-msi.txt
> @@ -0,0 +1,28 @@
> +* Altera PCIe MSI controller
> +
> +Required properties:
> +- compatible: should contain "altr,msi-1.0"
> +- reg: specifies the physical base address of the controller and
> + the length of the memory mapped region.
> +- reg-names: must include the following entries:
> + "csr": CSR registers
> + "vector_slave": vectors slave port region
> +- interrupt-parent: interrupt source phandle.
> +- interrupts: specifies the interrupt source of the parent interrupt
> + controller. The format of the interrupt specifier depends on the
> + parent interrupt controller.
> +- num-vectors: number of vectors, range 1 to 32.
> +- msi-controller: indicates that this is MSI controller node
> +
> +
> +Example
> +msi0: msi@0xFF200000 {
> + compatible = "altr,msi-1.0";
> + reg = <0xFF200000 0x00000010
> + 0xFF200010 0x00000080>;
> + reg-names = "csr", "vector_slave";
> + interrupt-parent = <&hps_0_arm_gic_0>;
> + interrupts = <0 42 4>;
> + msi-controller = <1>;

This should not have a value.

> + num-vectors = <32>;
> +};
> diff --git a/Documentation/devicetree/bindings/pci/altera-pcie.txt b/Documentation/devicetree/bindings/pci/altera-pcie.txt
> new file mode 100644
> index 0000000..4440db1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/altera-pcie.txt
> @@ -0,0 +1,49 @@
> +* Altera PCIe controller
> +
> +Required properties:
> +- compatible : should contain "altr,pcie-root-port-1.0"
> +- reg: a list of physical base address and length for TXS and CRA.
> +- reg-names: must include the following entries:
> + "Txs" or "txs": TX slave port region
> + "Cra" or "cra": Control register access region

Why both cases? Can we please just have one (or none is better IMO).

txs contains the config space?

> +- interrupt-parent: interrupt source phandle.
> +- interrupts: specifies the interrupt source of the parent interrupt controller.
> + The format of the interrupt specifier depends on the parent interrupt
> + controller.
> +- device_type: must be "pci"
> +- #address-cells: set to <3>
> +- #size-cells: set to <2>
> +- #interrupt-cells: set to <1>
> +- ranges: describes the translation of addresses for root ports and standard
> + PCI regions.
> +- interrupt-map-mask and interrupt-map: standard PCI properties to define the
> + mapping of the PCIe interface to interrupt numbers.
> +
> +Optional properties:
> +- msi-parent: Link to the hardware entity that serves as the MSI controller for this PCIe
> + controller.
> +- bus-range: PCI bus numbers covered
> +
> +Example
> + pcie_0: pcie@0xc00000000 {
> + compatible = "altr,pcie-root-port-1.0";
> + reg = <0xc0000000 0x20000000>,
> + <0xff220000 0x00004000>;
> + reg-names = "Txs", "Cra";
> + interrupt-parent = <&hps_0_arm_gic_0>;
> + interrupts = <0 40 4>;
> + interrupt-controller;
> + #interrupt-cells = <1>;
> + bus-range = <0x0 0xFF>;
> + device_type = "pci";
> + msi-parent = <&msi_to_gic_gen_0>;
> + #address-cells = <3>;
> + #size-cells = <2>;
> + interrupt-map-mask = <0 0 0 7>;
> + interrupt-map = <0 0 0 1 &pcie_0 1>,
> + <0 0 0 2 &pcie_0 2>,
> + <0 0 0 3 &pcie_0 3>,
> + <0 0 0 4 &pcie_0 4>;
> + ranges = <0x82000000 0x00000000 0x00000000 0xc0000000 0x00000000 0x10000000
> + 0x82000000 0x00000000 0x10000000 0xd0000000 0x00000000 0x10000000>;
> + };
>



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