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IMX6SX SDB PCIe Fails in U-Boot

Question asked by eliasradi on Apr 3, 2017
Latest reply on Apr 4, 2017 by eliasradi

  We've been trying to get PCIe working in u-boot on a Freescale IMX6SX SDB rev C and all we get is:

PCI: pcie phy link never came up
Hit any key to stop autoboot: 0
=> pci
pci_bus_to_hose() failed


we've tested the following:
- u-boot from fsl-yocto-L4.1.15_2.0.0-ga and enabled "#define CONFIG_CMD_PCI"
- u-boot from uboot-imx_v2015.04_3.14.52_1.1.0_ga and enabled "#define CONFIG_CMD_PCI"
- even got u-boot.imx binary from someone with Freescale IMX6SX SDB revA board that has PCIe working. That same binary fails PCIe on a rev C board.


Anything changed on SPF-27962 from A to C that requires some changes in code? We even backtracked the changes in SPF-27962 to make the board like a rev A w.r.t. to PCIe changes and still "pci" fails.


Initially thought it is a hardware issue, but we've tested and gotten same failed results on another custom IMX6SX board.

Anyone with any ideas? Anyone with a rev C IMX6SC SDB PCIe working in u-boot?