Re: [PATCH] Input: atmel_mxt_ts: Add of node type to the i2c table

Nick Dyer
2014-09-11T12:24:40Z

On 11/09/14 12:41, Javier Martinez Canillas wrote:
> On 09/11/2014 01:35 PM, Wolfram Sang wrote:
>>>> This is a workaround. It would make sense, however, to add it because we
>>>> want to support i2c_board_info structures.
>>>>
>>>
>>> I think it really depends if an IP block can be used on non-DT platforms
>>> (which I think is true for this trackpad) but if a driver is for an IP block
>>> that can only be used on a DT-only platform (e.g: a PMIC that is controlled
>>> over I2C and is only compatible with a DT-only SoC) then I don't think we need
>>> to support the i2c_board_info structure and can get rid of the I2C ID table on
>>> these drivers once Lee series land.
>>
>> That is exactly what I meant. It should be only added if there is a
>> reason other than "workaround". If you say, it doesn't make sense on
>> non-DT, then it should not be added.
>
> Sorry for explaining myself badly. I just tried to say that this is a decision
> that has to be made on a per-driver basis but I don't really know if makes
> sense or not in this case since I don't know if this device is (or could be)
> shipped on non-DT platforms. Nick is in a much better position to answer that
> question.

There are plenty of out-of-tree users of this driver which don't use DT.
The most significant use I'm aware of is on Chromium OS systems.