[Buildroot] How to use the ft6236 touchscreen driver ?

[David Picard]

Well, could you please give me some directions ? Like where the dts file 
is, how do I compile it, some reference documentation...

Thanks.

Le 13/07/2016 19:16, Baruch Siach a écrit :
> Hi David,
>
> On Wed, Jul 13, 2016 at 07:07:43PM +0200, David Picard wrote:
>> I am trying to use the touch capability of Adafruit's PiTFT 2.8" on a RPi2,
>> BR 2016.05. When I modprobe ft6236, nothing happens : no message in dmesg,
>> no device created in /dev/input. i2cdetect detects it at address 38h.
>>
>> I did load i2c_bcm2708, i2c-dev. I2C works (tested with a RTCC).
>>
>> I tried :
>> # echo ft6236 0x38 > /sys/class/i2c-adapter/i2c-1/new_device
>>
>> and I got something in dmesg :
>> ft6236 1-0038: irq is missing
>> ft6236: probe of 1-0038 failed with error -22
>> i2c i2c-1: new_device: Instantiated device ft6236 at 0x38
>>
>> But still no entry in /dev/input.
>>
>> Any idea ?
>
> You most likely need to update your device tree file (.dts), and add your
> PiTFT device as a sub-node of the i2c master.
>
> baruch
>