Can you give the hardware details please? On 14 June 2012 14:35, siddharth saxena <siddharthsaxena1989@gmail.com> wrote:
Initialized in Probe :
if (device->irq) { ret = request_irq(device->irq, ts_int_handler, IRQF_TRIGGER_LOW, DRIVER_NAME, device); if (ret) { pr_err("unable to register touch irq.(%s)\r\n", device->input_dev->name); goto err_request_irq; } }
The pin by default has to be initialized to Active Low.
On Thu, Jun 14, 2012 at 2:24 PM, anish singh <anish198519851985@gmail.com> wrote:
On Thu, Jun 14, 2012 at 2:11 PM, siddharth saxena <siddharthsaxena1989@gmail.com> wrote:
Hi Arun
I tried changing the flag to IRQF_TRIGGER_HIGH but then device is behaving abnormally(Hangs and is dead after some time). Flooding interrupts still observed. Problem not solved.
I want to know, are we supposed to change interrupt pin status or it is done automatically when we return IRQ_HANDLED. why don't you paste the code for your probe routine where you are calling request_irq. Are you using threaded irq?It would be difficult to diagnose the problem without looking at your TSP manual and your code to find out the problem.
On Thu, Jun 14, 2012 at 12:21 PM, Sarbojit Ganguly <unixman.linuxboy@gmail.com> wrote:
Hi Arun,
While I agree to your pointers but he is facing the problem of "interrupt floods" even before he touches. IMHO the culprit could be the flag.
On 14 June 2012 12:01, Arun KS <getarunks@gmail.com> wrote:
Hello Siddharth,
On Thu, Jun 14, 2012 at 10:34 AM, siddharth saxena <siddharthsaxena1989@gmail.com> wrote:
Hi all
I need help with an issue. I have written a touch driver for a device and used the flag IRQF_TRIGGER_LOW to request irq. Now, when I boot the device, the touch interrupts are coming already without touching the screen. Continuous interrupts are occurring without any touch.
Probably the default state of the gpio pin(which you configured as irq) is low. Check your HW schematic.
TSC should have interrupt polarity(Active High/Low), which you have to choose depending on your schematic while initiallizing the TSC. Also different modes like assert interrupt when finger moving, when finger touch, or assert periodically.
Hope these pointer will help you.
Thanks, Arun
-- Regards Siddharth Saxena
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-- Regards, Sarbojit
-- Regards Siddharth Saxena
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-- Regards Siddharth Saxena
-- Regards, Sarbojit