STRUCT IRQ_CHIP_GENE(9)                     Structures                    STRUCT IRQ_CHIP_GENE(9)



NAME
       struct_irq_chip_generic - Generic irq chip data structure

SYNOPSIS
       struct irq_chip_generic {
         raw_spinlock_t lock;
         void __iomem * reg_base;
         u32 (* reg_readl) (void __iomem *addr);
         void (* reg_writel) (u32 val, void __iomem *addr);
         void (* suspend) (struct irq_chip_generic *gc);
         void (* resume) (struct irq_chip_generic *gc);
         unsigned int irq_base;
         unsigned int irq_cnt;
         u32 mask_cache;
         u32 type_cache;
         u32 polarity_cache;
         u32 wake_enabled;
         u32 wake_active;
         unsigned int num_ct;
         void * private;
         unsigned long installed;
         unsigned long unused;
         struct irq_domain * domain;
         struct list_head list;
         struct irq_chip_type chip_types[0];
       };

MEMBERS
       lock
           Lock to protect register and cache data access

       reg_base
           Register base address (virtual)

       reg_readl
           Alternate I/O accessor (defaults to readl if NULL)

       reg_writel
           Alternate I/O accessor (defaults to writel if NULL)

       suspend
           Function called from core code on suspend once per chip; can be useful instead of
           irq_chip::suspend to handle chip details even when no interrupts are in use

       resume
           Function called from core code on resume once per chip; can be useful instead of
           irq_chip::suspend to handle chip details even when no interrupts are in use

       irq_base
           Interrupt base nr for this chip

       irq_cnt
           Number of interrupts handled by this chip

       mask_cache
           Cached mask register shared between all chip types

       type_cache
           Cached type register

       polarity_cache
           Cached polarity register

       wake_enabled
           Interrupt can wakeup from suspend

       wake_active
           Interrupt is marked as an wakeup from suspend source

       num_ct
           Number of available irq_chip_type instances (usually 1)

       private
           Private data for non generic chip callbacks

       installed
           bitfield to denote installed interrupts

       unused
           bitfield to denote unused interrupts

       domain
           irq domain pointer

       list
           List head for keeping track of instances

       chip_types[0]
           Array of interrupt irq_chip_types

DESCRIPTION
       Note, that irq_chip_generic can have multiple irq_chip_type implementations which can be
       associated to a particular irq line of an irq_chip_generic instance. That allows to share
       and protect state in an irq_chip_generic instance when we need to implement different flow
       mechanisms (level/edge) for it.

AUTHORS
       Thomas Gleixner <tglx AT linutronix.de>
           Author.

       Ingo Molnar <mingo AT elte.hu>
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   STRUCT IRQ_CHIP_GENE(9)