topic Re: PCIe in SABRESDP in i.MX Processors

PCIe in SABRESDP

vijaikumar — Wed, 23 Sep 2015 11:52:12 GMT

Hi All,

I am currently trying to get PCIe up in SABRESDP( SABRE for Smart Devices Reference Design|Freescale ). I am using imx_3.14.28_1.0.0_ga branch and have enabled the following configurations in menuconfig as mentioned in i.MX 6 Linux® Reference Manual, Rev. L3.14.28_1.0.0-ga.

CONFIG_PCI=y

CONFIG_PCI_DOMAINS=y

CONFIG_PCI_SYSCALL=y

CONFIG_PCIE_DW=y

CONFIG_PCI_IMX6=y

I am getting the following error.

bus: 'platform': add driver imx6q-pcie

bus: 'platform': driver_probe_device: matched device 1ffc000.pcie with driver imx6q-pcie

bus: 'platform': really_probe: probing driver imx6q-pcie with device 1ffc000.pcie

imx6q-pcie 1ffc000.pcie: no default pinctrl state

imx6q-pcie 1ffc000.pcie: phy link never came up

imx6q-pcie 1ffc000.pcie: Failed to bring link up!

imx6q-pcie 1ffc000.pcie: failed to initialize host

imx6q-pcie: probe of 1ffc000.pcie failed with error -22

bus: 'platform': remove driver imx6q-pcie

driver: 'imx6q-pcie': driver_release

lspci shows nothing. I have not connected any PCIe devices to the board. Atleast I should be able to see the root complex using lspci command. Any ideas on what is wrong?

Re: PCIe in SABRESDP

igorpadykov — Thu, 24 Sep 2015 01:42:20 GMT

Hi Vijai

please try with connected PCIe card, without it

lspci will show nothing. Recommended to try several cards.

Best regards

igor

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Re: PCIe in SABRESDP

vijaikumar — Thu, 24 Sep 2015 05:18:02 GMT

Hi igorpadykov,

Currently we are using MU609 modem from Huawei. This card has already been proved with other processors. Moreover the 3.10.17 kernel detects the root complex without any issues. when I do lspci in 3.10.17 I can see the vendor ID and device ID of it. Is there any workarounds I have to do inorder to get root complex up on 3.14.28 kernel?

Re: PCIe in SABRESDP

igorpadykov — Thu, 24 Sep 2015 11:25:20 GMT

one can try to change usleep_range, as described at

Re: i.MX6 PCIe bug (scheduling while atomic)

~igor

Re: PCIe in SABRESDP

alexlevandovski — Wed, 06 Jul 2016 13:13:14 GMT

Hello,Vijai I have the same Problem. I looked to pci-imx6.c and see the same time as in Link from igorpadykov, but steel have the problem. Do you know, how to get problem away?

regards Alex