Re: [PATCH 3/5] iommu/tegra-smmu: Use iommu_fwspec in .probe_/.attach_device()

Nicolin Chen
2020-09-29T05:42:11Z

On Tue, Sep 29, 2020 at 07:06:37AM +0300, Dmitry Osipenko wrote:
> ...
> >> As I mentioned in another reply, I think tegra_smmu_find() should be all
> >> you need in this case.
> >
> > This function is used by .probe_device() where its dev pointer is
> > an SMMU client. IIUC, tegra_smmu_find() needs np pointer of "mc".
> > For a PCI device that doesn't have a DT node with iommus property,
> > not sure how we can use tegra_smmu_find().
>
> Perhaps you could get np from struct pci_dev.bus?

Possibly yes...but I was hoping the solution would be potentially
reused by other devices that don't have DT nodes, USB for example,
though I haven't tested with current version.