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

[Stephen Warren]

On 10/23/2015 09:47 AM, Simon Glass wrote:
> Hi Stephen,
>
> On 21 October 2015 at 14:16, Stephen Warren <swarren at 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?