|
Hi, 1. When we probe a device, how does it find out that the
device actually exists and is functional? 2. Do we probe for interrupts to check which interrupt line(s)
can be assigned to the device in question? 3. When the driver is calling probe_irq_on, it returns a bit
mask of unassigned interrupts. In such case driver assigns an interrupt line
for that specific device, Am I right? 4. If so, then how does the driver decide which interrupt
line to assign to the device? 5. Once the driver assigns the interrupt line, why does the
programmer need to explicity enable the interrupt for that device. Shouldn’t
that be done by probe_irq_on as default? 6. Why do we say that the programmer must be careful to
enable interrupts on the device after the call to the above function and
disable them before the probe_irq_off? TIA. Regards, Rajendra Stalekar(extn 2016) Location:- Akruti Mobile no:- +91 9860501143 |
