|
@@ -1983,7 +1983,7 @@ This function receives the IRQ number, the name of the function, flags, a name f
|
|
|
Usually there is a certain number of IRQs available.
|
|
Usually there is a certain number of IRQs available.
|
|
|
How many IRQs there are is hardware-dependent.
|
|
How many IRQs there are is hardware-dependent.
|
|
|
|
|
|
|
|
-The flags can be used for specify behaviors of the IRQ.
|
|
|
|
|
|
|
+The flags can be used to specify behaviors of the IRQ.
|
|
|
For example, use \cpp|IRQF_SHARED| to indicate you are willing to share the IRQ with other interrupt handlers (usually because a number of hardware devices sit on the same IRQ); use the \cpp|IRQF_ONESHOT| to indicate that the IRQ is not reenabled after the handler finished.
|
|
For example, use \cpp|IRQF_SHARED| to indicate you are willing to share the IRQ with other interrupt handlers (usually because a number of hardware devices sit on the same IRQ); use the \cpp|IRQF_ONESHOT| to indicate that the IRQ is not reenabled after the handler finished.
|
|
|
It should be noted that in some materials, you may encounter another set of IRQ flags named with the \cpp|SA| prefix.
|
|
It should be noted that in some materials, you may encounter another set of IRQ flags named with the \cpp|SA| prefix.
|
|
|
For example, the \cpp|SA_SHIRQ| and the \cpp|SA_INTERRUPT|.
|
|
For example, the \cpp|SA_SHIRQ| and the \cpp|SA_INTERRUPT|.
|
Cheng-Yang Chou