[GIT PULL] ARM: dts: aspeed: Changes for v4.15

[Joel Stanley]

On Fri, Nov 17, 2017 at 1:27 PM, Joel Stanley <joel at jms.id.au> wrote:
> On Fri, Oct 20, 2017 at 8:19 AM, Arnd Bergmann <arnd at arndb.de> wrote:
>> On Fri, Oct 6, 2017 at 9:05 AM, Joel Stanley <joel at jms.id.au> wrote:
>>> Hello ARM SoC maintainers!
>>>
>>> Here are some ASPEED device tree updates for v4.15.
>>>
>>> Sadly our clk driver is still under review, so I have not been able to
>>> include all of the patches I intended to. Alas, these improvements are
>>> still useful.
>>
>> Pulled into next/dt
>
> I noticed this didn't make it into Linus tree for 4.15 :(

Scratch that. My mistake, it is there (I was looking at the wrong part
of the diffstat). We should still clear up your query about the
aliases.

>
> Was it because of your question below?
>
>>
>>>     ARM: dts: aspeed: Add aliases for UARTs
>>
>> Can you explain this one? It looks like you now have aliases for
>> all uart and i2c entries on all machines, even when they don't
>> actually expose the ports. The purpose of the aliases is to
>> only list the ones that are actually usable, so they should normally
>> go into the board specific .dts files.
>
> Sorry for not responding to this at the time. I was on vacation.
>
> The idea was to maintain expectations for userspace where they assume
> the character devices match the numbering of the hardware. So
> /dev/ttyS4 is always the fifth uart, even when the board only has one
> or two wired up.
>
> If we don't do that, our userspace developers have trouble telling
> which UART is actually /dev/ttyS0, for example.
>
> Cheers,
>
> Joel