Re: [PATCH 2/3] PCI: host: pcie-designware: add support for suspend and resume

[Pratyush Anand]

Hi Kishon,

On Fri, Jul 3, 2015 at 4:33 PM, Kishon Vijay Abraham I <kishon@xxxxxx> wrote:
> Certain platforms require MSE bit to be cleared to set the master
> in standby mode. (In DRA7xx TRM_vE, section 24.9.4.5.2.2.1 PCIe
> Controller Master Standby Behavior advises to use the clearing
> of the local MSE bit to set the master in standby. Without this
> some of the clocks do not idle).
>
> Cleared the MSE bit on suspend and enabled it back on resume.
> This is required to get suspend/resume working.

Have you tested with a card having IO space memory as well.
I think you might need to require clear and enable PCI_COMMAND_IO
in suspend and resume respectively.

~Pratyush
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