mirror of
https://github.com/torvalds/linux.git
synced 2024-12-18 00:53:40 +00:00
5f6b6ccdbe
Add the AppliedMicro X-Gene SOC PCIe host controller driver. The X-Gene PCIe controller supports up to 8 lanes and GEN3 speed. The X-Gene SOC supports up to 5 PCIe ports. [bhelgaas: folded in MAINTAINERS and bindings updates] Tested-by: Ming Lei <ming.lei@canonical.com> Tested-by: Dann Frazier <dann.frazier@canonical.com> Signed-off-by: Tanmay Inamdar <tinamdar@apm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Liviu Dudau <Liviu.Dudau@arm.com> (driver)
58 lines
1.9 KiB
Plaintext
58 lines
1.9 KiB
Plaintext
* AppliedMicro X-Gene PCIe interface
|
|
|
|
Required properties:
|
|
- device_type: set to "pci"
|
|
- compatible: should contain "apm,xgene-pcie" to identify the core.
|
|
- reg: A list of physical base address and length for each set of controller
|
|
registers. Must contain an entry for each entry in the reg-names
|
|
property.
|
|
- reg-names: Must include the following entries:
|
|
"csr": controller configuration registers.
|
|
"cfg": pcie configuration space registers.
|
|
- #address-cells: set to <3>
|
|
- #size-cells: set to <2>
|
|
- ranges: ranges for the outbound memory, I/O regions.
|
|
- dma-ranges: ranges for the inbound memory regions.
|
|
- #interrupt-cells: set to <1>
|
|
- interrupt-map-mask and interrupt-map: standard PCI properties
|
|
to define the mapping of the PCIe interface to interrupt
|
|
numbers.
|
|
- clocks: from common clock binding: handle to pci clock.
|
|
|
|
Optional properties:
|
|
- status: Either "ok" or "disabled".
|
|
- dma-coherent: Present if dma operations are coherent
|
|
|
|
Example:
|
|
|
|
SoC specific DT Entry:
|
|
|
|
pcie0: pcie@1f2b0000 {
|
|
status = "disabled";
|
|
device_type = "pci";
|
|
compatible = "apm,xgene-storm-pcie", "apm,xgene-pcie";
|
|
#interrupt-cells = <1>;
|
|
#size-cells = <2>;
|
|
#address-cells = <3>;
|
|
reg = < 0x00 0x1f2b0000 0x0 0x00010000 /* Controller registers */
|
|
0xe0 0xd0000000 0x0 0x00040000>; /* PCI config space */
|
|
reg-names = "csr", "cfg";
|
|
ranges = <0x01000000 0x00 0x00000000 0xe0 0x10000000 0x00 0x00010000 /* io */
|
|
0x02000000 0x00 0x80000000 0xe1 0x80000000 0x00 0x80000000>; /* mem */
|
|
dma-ranges = <0x42000000 0x80 0x00000000 0x80 0x00000000 0x00 0x80000000
|
|
0x42000000 0x00 0x00000000 0x00 0x00000000 0x80 0x00000000>;
|
|
interrupt-map-mask = <0x0 0x0 0x0 0x7>;
|
|
interrupt-map = <0x0 0x0 0x0 0x1 &gic 0x0 0xc2 0x1
|
|
0x0 0x0 0x0 0x2 &gic 0x0 0xc3 0x1
|
|
0x0 0x0 0x0 0x3 &gic 0x0 0xc4 0x1
|
|
0x0 0x0 0x0 0x4 &gic 0x0 0xc5 0x1>;
|
|
dma-coherent;
|
|
clocks = <&pcie0clk 0>;
|
|
};
|
|
|
|
|
|
Board specific DT Entry:
|
|
&pcie0 {
|
|
status = "ok";
|
|
};
|