touch screen interrupts

[Oana Medvesan]

Hello

I use a Qualcomm Device (apq8074Dragonboard) with this kernel:
msm-AU_LINUX_ANDROID_JB_3.2_RB5.04.03.00.146.064

And in one of my own applications (not a kernel driver) i try to catch the touch screen interrupt.

cat /proc/interrupts | grep gpio                            
 
240:          1       GIC  msmgpio

288:          0   msmgpio  wcd9xxx

290:          0   msmgpio  msm-sdccsdiowakeup

291:          0   msmgpio
 
331:          1   msmgpio  atmel_mxt_ts

The Ts controller is an atmel, so I thought that  IRQ=331 is the one.
But I can’t catch it.
I can catch the msmgpio GIC IRQ (the 240) but not the msmgpio type.
Could you give me any pointers on how the msmgpio interrupt works for the touchscreen and how exactly should I catch it?


Thanks you

Regards,
Oana

[hedwin]

a userspace appliaction can not catch an hardware interrupt directly. you need a driver to handle this or alternatively use user space io.

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[Oana Medvesan]

Hello

Yes, you're right. I forgot to mention that my app is a secure driver (not a linux driver)
I am able to catch all the GIC interrupts (timer, etc) but not the msmgpio type and i don't understand why.
Something different about this msmgpio type...