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ads7846 / Banana pro


arcadialabs
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Hi,

 

I own several SPI touch displays, and I would like to use them with armbian.

I got the displays to work already, but I'm now trying to get the touchpanels to work also.

 

I'm using Debian Jessie Server Legacy 5.20 with a BananaPro board.

 

I tried to add the module to /etc/modules :

ads7846_device gpio_pendown=17 cs=1 x_plate_ohms=400 pressure_max=255 swap_xy=0
ads7846

... does not work, I don't even see an error in dmesg.

I also tried to put the options in a /etc/modprobe.d/ads7846.conf, /etc/modprobe.d/ads7846_device.conf and /etc/modprobe.d/fbtft_device.conf but nothing works.

 

Manual modprobe :

modprobe ads7846 

loads fine (I could see it in lsmod), but

modprobe ads7846_device gpio_pendown=17 cs=1 x_plate_ohms=400 pressure_max=255 swap_xy=0

returns modprobe: FATAL: Module ads7846_device not found.

 

Do you have an idea ?

Thank you !

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You need to add at least something like this:

https://github.com/raspberrypi/linux/blob/rpi-4.4.y/arch/arm/boot/dts/overlays/ads7846-overlay.dts

This is valid for recent Vanilla kernel, for legacy ... module is present:

https://github.com/igorpecovnik/lib/blob/master/config/kernel/linux-sun7i-default.config#L1702

but perhaps it has to be enabled in HW config (script.bin).

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