Messages in this thread | | | Date | Tue, 9 Aug 2011 19:16:30 -0700 | From | Greg KH <> | Subject | Re: kernel panic with simple driver |
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On Wed, Aug 10, 2011 at 10:33:28AM +0900, Murali K. Vemuri wrote: > There is no concurrent access to the timer. The design is that: > 1.Driver provides an IOCTL for start / stop > 2. when the driver receives START IOCTL, it toggles some GPIOs to ON / OFF. > 3. the GPIOs will be ON for 500 MSec and OFF for 500 MSec. > 4. Two successive START IOCTLs will not be honored. > 5. There is only one application that uses these IOCTLs > 6. When I receive a STOP IOCTL, I am doing : > if (timer_pending (&my_timer)) > del_timer(&my_timer);
What kind of driver is this? For what type of hardware?
Can't you control the gpios from userspace with out any need to write a kernel driver?
thanks,
greg k-h
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