struct_irq_chip(9) [suse man page]
STRUCT
IRQ_CHIP(9) Structures STRUCT IRQ_CHIP(9) NAME
struct_irq_chip - hardware interrupt chip descriptor SYNOPSIS
struct irq_chip { const char * name; unsigned int (* startup) (unsigned int irq); void (* shutdown) (unsigned int irq); void (* enable) (unsigned int irq); void (* disable) (unsigned int irq); void (* ack) (unsigned int irq); void (* mask) (unsigned int irq); void (* mask_ack) (unsigned int irq); void (* unmask) (unsigned int irq); void (* eoi) (unsigned int irq); void (* end) (unsigned int irq); int (* set_affinity) (unsigned int irq,const struct cpumask *dest); int (* retrigger) (unsigned int irq); int (* set_type) (unsigned int irq, unsigned int flow_type); int (* set_wake) (unsigned int irq, unsigned int on); void (* bus_lock) (unsigned int irq); void (* bus_sync_unlock) (unsigned int irq); #ifdef CONFIG_IRQ_RELEASE_METHOD void (* release) (unsigned int irq, void *dev_id); #endif const char * typename; }; MEMBERS
name name for /proc/interrupts startup start up the interrupt (defaults to ->enable if NULL) shutdown shut down the interrupt (defaults to ->disable if NULL) enable enable the interrupt (defaults to chip->unmask if NULL) disable disable the interrupt ack start of a new interrupt mask mask an interrupt source mask_ack ack and mask an interrupt source unmask unmask an interrupt source eoi end of interrupt - chip level end end of interrupt - flow level set_affinity set the CPU affinity on SMP machines retrigger resend an IRQ to the CPU set_type set the flow type (IRQ_TYPE_LEVEL/etc.) of an IRQ set_wake enable/disable power-management wake-on of an IRQ bus_lock function to lock access to slow bus (i2c) chips bus_sync_unlock function to sync and unlock slow bus (i2c) chips release release function solely used by UML typename obsoleted by name, kept as migration helper AUTHORS
Thomas Gleixner <tglx@linutronix.de> Author. Ingo Molnar <mingo@elte.hu> Author. COPYRIGHT
Kernel Hackers Manual 2.6. July 2010 STRUCT IRQ_CHIP(9)
Check Out this Related Man Page
REQUEST_THREADED_IRQ(9) Public Functions Provided REQUEST_THREADED_IRQ(9) NAME
request_threaded_irq - allocate an interrupt line SYNOPSIS
int request_threaded_irq(unsigned int irq, irq_handler_t handler, irq_handler_t thread_fn, unsigned long irqflags, const char * devname, void * dev_id); ARGUMENTS
irq Interrupt line to allocate handler Function to be called when the IRQ occurs. Primary handler for threaded interrupts If NULL and thread_fn != NULL the default primary handler is installed thread_fn Function called from the irq handler thread If NULL, no irq thread is created irqflags Interrupt type flags devname An ascii name for the claiming device dev_id A cookie passed back to the handler function DESCRIPTION
This call allocates interrupt resources and enables the interrupt line and IRQ handling. From the point this call is made your handler function may be invoked. Since your handler function must clear any interrupt the board raises, you must take care both to initialise your hardware and to set up the interrupt handler in the right order. If you want to set up a threaded irq handler for your device then you need to supply handler and thread_fn. handler is still called in hard interrupt context and has to check whether the interrupt originates from the device. If yes it needs to disable the interrupt on the device and return IRQ_WAKE_THREAD which will wake up the handler thread and run thread_fn. This split handler design is necessary to support shared interrupts. Dev_id must be globally unique. Normally the address of the device data structure is used as the cookie. Since the handler receives this value it makes sense to use it. If your interrupt is shared you must pass a non NULL dev_id as this is required when freeing the interrupt. FLAGS
IRQF_SHARED Interrupt is shared IRQF_TRIGGER_* Specify active edge(s) or level AUTHORS
Thomas Gleixner <tglx@linutronix.de> Author. Ingo Molnar <mingo@elte.hu> Author. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 REQUEST_THREADED_IRQ(9)