4.5-rc1 kernel is failed to bootup on FSL LS2080 RDB board

On 1/26/2016 10:27 PM, Bhupesh Sharma wrote:

Hi,

quoted

From: Shi, Yang
Sent: Wednesday, January 27, 2016 5:33 AM

quoted

Hi folks,

I tried to boot 4.5-rc1 kernel on my FSL LS2080 RDB (aka LS2085 RDB), but
it is failed silently. If I use the dtb file shipped with the SDK with
4.5-rc1 kernel, I can get the serial console output, but it is failed to
detect PCI bus.

If I use both kernel and dtb from the SDK, it works well.

The bootloader information:

U-Boot 2015.07-rc1Layerscape2-SDK+g7e8bad0 (Aug 27 2015 - 14:31:42)

SoC:  LS2085E (0x87010010)
Clock Configuration:
         CPU0(A57):1600 MHz  CPU1(A57):1600 MHz  CPU2(A57):1600 MHz
         CPU3(A57):1600 MHz  CPU4(A57):1600 MHz  CPU5(A57):1600 MHz
         CPU6(A57):1600 MHz  CPU7(A57):1600 MHz
         Bus:      600  MHz  DDR:      1333.333 MT/s     DP-DDR:
1333.333 MT/s
Reset Configuration Word (RCW):
         00: 40282830 40400040 00000000 00000000
         10: 00000000 00200000 00200000 00000000
         20: 00c12980 00002580 00000000 00000000
         30: 00000e0b 00000000 00000000 00000000
         40: 00000000 00000000 00000000 00000000
         50: 00000000 00000000 00000000 00000000
         60: 00000000 00000000 00027000 00000000
         70: 412a0000 00000000 00000000 00000000
Model: Freescale Layerscape 2085a RDB Board
Board: LS2085E-RDB, Board Arch: V1, Board version: D, boot from vBank: 4
FPGA: v1.18

And, I have ARCH_LAYERSCAPE, CONFIG_PCIE_DW and CONFIG_PCI_LAYERSCAPE
enabled.

Any hint is appreciated.

As Minghuan (our PCI developer, added in CC) suggested the reason is that uboot is for
LS2085a but kernel dtb is for ls2080.

Please apply the patch https://patchwork.kernel.org/patch/7767061/ and try again.

Thanks so much. That patch just solves the problem partially, I just 
found the layerscape pci host driver need recognize ls2085a compatible 
too. With the both fix, I can get the PCI work.

I already sent the patch to the mailing list.

Regards,
Yang

Regards,
Bhupesh