[U-Boot] [PATCH 2/8] dm: pci: Avoid a driver model build error with CONFIG_CMD_PCI_ENUM

[Thierry Reding <treding@nvidia.com>]

On Fri, Oct 23, 2015 at 11:30:04AM -0600, Stephen Warren wrote:
> On 10/23/2015 09:47 AM, Simon Glass wrote:
> >Hi Stephen,
> >
> >On 21 October 2015 at 14:16, Stephen Warren <swarren@wwwdotorg.org> wrote:
> >>On 10/17/2015 11:49 AM, Simon Glass wrote:
> >>>
> >>>This is not supported with driver model, so print a message instead of
> >>>generating a build error. Rescanning PCI is not yet implemented.
> >>
> >>
> >>>diff --git a/common/cmd_pci.c b/common/cmd_pci.c
> >>
> >>
> >>>@@ -457,7 +457,11 @@ static int do_pci(cmd_tbl_t *cmdtp, int flag, int
> >>>argc, char * const argv[])
> >>>                 return pci_cfg_display(bdf, addr, size, value);
> >>>   #ifdef CONFIG_CMD_PCI_ENUM
> >>>         case 'e':
> >>>+# ifdef CONFIG_DM_PCI
> >>>+               printf("This command is not yet supported with driver
> >>>model\n");
> >>>+# else
> >>>                 pci_init();
> >>>+# endif
> >>
> >>
> >>That feature is enabled on most/all Tegra boards with PCI support. Hopefully
> >>nobody will miss it; I guess I haven't used it so I don't object to this
> >>change.
> >>
> >>However, wouldn't it be better to remove CONFIG_CMD_PCI_ENUM from the config
> >>header rather than leaving the command enabled yet non-functional? Or are
> >>you planning on implementing this path in the near future?
> >
> >I was looking for feedback on why anyone would use this option. It's
> >not clear to me what it is for.
> 
> I assume it's to support hot-pluggable PCI connectors? Or perhaps it's just
> useful during debug of PCI drivers?
> 
> >We can implement it for driver model if it is needed.
> 
> I'd be happy disabling it in the configs myself. Thierry, you enabled the
> option when you first implemented the Tegra PCIe controller driver. Do you
> have a preference?

Removing it from the configs is fine with me. I don't think I've
actually ever used it since all the way back when I was working on the
initial driver prototype.

Thierry
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