Re: A question about touchscreen absmax value

[Joonyoung Shim <jy0922.shim@samsung.com>]

On 11/17/2009 2:48 PM, Dmitry Torokhov wrote:
> On Tue, Nov 17, 2009 at 12:00:08PM +0900, Joonyoung Shim wrote:
>> On 11/17/2009 2:12 AM, Dmitry Torokhov wrote:
>>> Hi Joonyoung,
>>>
>>> On Mon, Nov 16, 2009 at 10:53:18AM +0900, Joonyoung Shim wrote:
>>>> Hi, all.
>>>>
>>>> I have a question about touchscreen resolution. My touchscreen device
>>>> can report the position from 0 to 1023 of x and y coordinates, so i
>>>> setted the absmax of input device to 1023. BTW, i only can get from 0 to 
>>>> 479 x position and to 799 y position because the LCD resolution of the
>>>> target is 480 x 800. I wonder which value is setted to the absmax - 479
>>>> and 799 or 1023.
>>> I believe driver should, by default, set absmin and absmax to match the
>>> limits of the hardware/protocol. In your case it would be 1023. The
>>> driver may choose to accept additional infromation from platform data, if
>>> present, you can also adjust absmin/absmax etc via ioctl durng the
>>> bootup sequence.
>> Hmm, i get the resolution information from platform data, so i can 
>> set absmax values from platform data. Is it ok?
>>
> 
> Sure, if there is only one possible configuration for the device on a
> given platform - yes.
> 

OK, it is helpful me.

Thanks.