# Re: \[PATCH\] dt-bindings: input: touchscreen: ilitek\_ts\_i2c: Absorb ili2xxx bindings

- From: Marek Vasut \<marex@denx.de\>
- Date: 2021-06-11 21:50:02 
- List: linux-devicetree
- Page: https://ratatoskr.run/linux-devicetree/2021/06/8192017
- Thread: https://ratatoskr.run/linux-input/2021/06/8191992/t.md

```text
On 6/11/21 8:32 PM, Dmitry Torokhov wrote:

Hi,

>>> On 6/11/21 3:54 PM, Geert Uytterhoeven wrote:
>>>> While Linux uses a different driver, the Ilitek
>>>> ILI210x/ILI2117/ILI2120/ILI251x touchscreen controller Device Tree
>>>> binding documentation is very similar.
>>>>
>>>>     - Drop the fixed reg value, as some controllers use a different
>>>>       address,
>>>>     - Make reset-gpios optional, as it is not always wired.
>>>
>>> It looks like there are now two drivers for the same hardware,
>>> drivers/input/touchscreen/ili210x.c
>>> drivers/input/touchscreen/ilitek_ts_i2c.c
>>> The ilitek_ts_i2c (newer) seems to be derived from the ilitek example
>>> code / driver, while the ili210x was written from scratch as far as I
>>> can tell.
>>
>> I'm not so sure they're for the same hardware, but you may know better?
>> https://www.displayvisions.us/fileadmin/html-seiten/eng/pdf/zubehoer/ILITek_TP_Programming_Guide_V1.50.pdf
>> lists only Ilitek parts handled by ilitek_ts_i2c.c.
>
> Ilitek folks said that the new driver is for their "Lego" series
> controllers, whereas ili210x.c is for older hardware.

The older driver also supports 251x . What exactly is "Lego" series ?
In fact, is there documentation for the different ILI2xxx touchscreen controllers ? So far, all the information I had was pulled from the various forks of downstream example code.
```