z8530_interrupt(9) [centos man page]

Z8530_INTERRUPT(9)					     Public Functions Provided						Z8530_INTERRUPT(9)

NAME

       z8530_interrupt - Handle an interrupt from a Z8530

SYNOPSIS

       irqreturn_t z8530_interrupt(int irq, void * dev_id);

ARGUMENTS

       irq
	   Interrupt number

       dev_id
	   The Z8530 device that is interrupting.

DESCRIPTION

       A Z85[2]30 device has stuck its hand in the air for attention. We scan both the channels on the chip for events and then call the channel
       specific call backs for each channel that has events. We have to use callback functions because the two channels can be in different modes.

       Locking is done for the handlers. Note that locking is done at the chip level (the 5uS delay issue is per chip not per channel). c->lock
       for both channels points to dev->lock

AUTHOR

       Alan Cox <alan@lxorguk.ukuu.org.uk>
	   Author.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014							Z8530_INTERRUPT(9)

STRUCT 
IRQ_DATA(9)						    Structures							STRUCT IRQ_DATA(9)

NAME

       struct_irq_data - per irq and irq chip data passed down to chip functions

SYNOPSIS

       struct irq_data {
	 unsigned int irq;
	 unsigned long hwirq;
	 unsigned int node;
	 unsigned int state_use_accessors;
	 struct irq_chip * chip;
	 struct irq_domain * domain;
	 void * handler_data;
	 void * chip_data;
	 struct msi_desc * msi_desc;
	 cpumask_var_t affinity;
       };

MEMBERS

       irq
	   interrupt number

       hwirq
	   hardware interrupt number, local to the interrupt domain

       node
	   node index useful for balancing

       state_use_accessors
	   status information for irq chip functions. Use accessor functions to deal with it

       chip
	   low level interrupt hardware access

       domain
	   Interrupt translation domain; responsible for mapping between hwirq number and linux irq number.

       handler_data
	   per-IRQ data for the irq_chip methods

       chip_data
	   platform-specific per-chip private data for the chip methods, to allow shared chip implementations

       msi_desc
	   MSI descriptor

       affinity
	   IRQ affinity on SMP

DESCRIPTION

       The fields here need to overlay the ones in irq_desc until we cleaned up the direct references and switched everything over to irq_data.

AUTHORS

       Thomas Gleixner <tglx@linutronix.de>
	   Author.

       Ingo Molnar <mingo@elte.hu>
	   Author.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014							STRUCT IRQ_DATA(9)