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arm64: dts: imx94: Correct PCIe outbound address space configuration

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Fix the PCIe outbound memory ranges for both pcie0 controllers on i.MX94.

The memory window size was incorrectly set to 256MB during initial
bring-up, but the hardware supports up to 4GB of outbound address space
per controller.

Additionally, the ECAM region cannot be mapped as I/O space. Use a
memory-mapped region for I/O space instead, and relocate the 1MB I/O
region to immediately follow the memory region at offset 0xf0000000
within each window.

Update the outbound address space layout per controller as follows:

  - 3.5GB  64-bit prefetchable memory
  - 256MB  32-bit non-prefetchable memory
  - 1MB    I/O

Fixes: 8cd439f177 ("arm64: dts: imx94: Add pcie0 and pcie0-ep supports")
Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
This commit is contained in:
Richard Zhu 2026-06-04 10:38:20 +08:00 committed by Frank Li
parent 368eb597c6
commit ffccbd6804
1 changed files with 3 additions and 2 deletions
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arch/arm64/boot/dts/freescale/imx94.dtsi
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@ -1374,8 +1374,9 @@ pcie0: pcie@4c300000 {
<0 0x4c360000 0 0x10000>,
<0 0x4c340000 0 0x4000>;
reg-names = "dbi", "config", "atu", "app";
ranges = <0x81000000 0x0 0x00000000 0x0 0x6ff00000 0 0x00100000>,
<0x82000000 0x0 0x10000000 0x9 0x10000000 0 0x80000000>;
ranges = <0x43000000 0x9 0x00000000 0x9 0x00000000 0x0 0xe0000000>,
<0x82000000 0x0 0xe0000000 0x9 0xe0000000 0x0 0x10000000>,
<0x81000000 0x0 0x00000000 0x9 0xf0000000 0x0 0x00100000>;
#address-cells = <3>;
#size-cells = <2>;
device_type = "pci";