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

- From: Dmitry Torokhov \<dmitry.torokhov@gmail.com\>
- Date: 2021-06-11 18:33:44 
- List: linux-input
- Page: https://ratatoskr.run/linux-input/2021/06/8192012
- Thread: https://ratatoskr.run/linux-input/2021/06/8191992/t.md

```text
Hi Geert, Maerek,

On Fri, Jun 11, 2021 at 08:23:10PM +0200, Geert Uytterhoeven wrote:
> Hi Marek,
> 
> On Fri, Jun 11, 2021 at 4:20 PM Marek Vasut [ref] wrote:
> > 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.

Thanks.

-- 
Dmitry
```