[U-Boot] [PATCH 1/2] Tegra114: fdt: Update DT files with I2C info for T114/Dalmore

[Stephen Warren <swarren@wwwdotorg.org>]

On 01/29/2013 02:57 PM, Tom Warren wrote:
> Stephen,
> 
> On Tue, Jan 29, 2013 at 2:08 PM, Stephen Warren <swarren@wwwdotorg.org> wrote:
>> On 01/29/2013 01:40 PM, Tom Warren wrote:
>>> Stephen,
>>>
>>> On Tue, Jan 29, 2013 at 1:09 PM, Stephen Warren <swarren@wwwdotorg.org> wrote:
>>>> On 01/29/2013 12:19 PM, Tom Warren wrote:
>>>>> Note that T114 does not have a separate/different DVC (power I2C)
>>>>> controller like T20 - all 5 I2C controllers are identical, but
>>>>> I2C5 is used to designate the controller intended for power
>>>>> control (PWR_I2C in the schematics).

>>>>> +             reg = <0x7000c000 0x100>;
>>>>
>>>> The interrupts property is missing here.
>>>
>>> I didn't have an interrupts property for I2C on the T30 dts files,
>>> either.
>>
>> That sounds like a bug in the DT.
>>
>>> What is it used for in U-Boot?
>>
>> U-Boot doesn't use interrupts at least on Tegra, so it's not used.
>> However, it'd be best to keep the U-Boot DT in line with the kernel DT
>> so we can easily spot differences. There has been talk of trying to use
>> the same DT for both too, although we're a long long way off from that.
> 
> I'll add it, but it seems silly to add unused values, especially when
> your past review critiques of DT files have asked for minimum
> functionality, which I agree with.

I meant to mention here that my previous comments were about unused
nodes; it doesn't seem useful to add a bunch of nodes that we aren't
using, until the drivers are ready and we actually end up using those
nodes. However, when a node is added, we should fill it in fully, so the
DT conforms to the binding for that node.