diff options
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/generic-chip.c | 50 |
1 files changed, 34 insertions, 16 deletions
diff --git a/kernel/irq/generic-chip.c b/kernel/irq/generic-chip.c index 5068fe3ae1af..3deb3333d53e 100644 --- a/kernel/irq/generic-chip.c +++ b/kernel/irq/generic-chip.c @@ -186,6 +186,19 @@ int irq_gc_set_wake(struct irq_data *d, unsigned int on) return 0; } +static void +irq_init_generic_chip(struct irq_chip_generic *gc, const char *name, + int num_ct, unsigned int irq_base, + void __iomem *reg_base, irq_flow_handler_t handler) +{ + raw_spin_lock_init(&gc->lock); + gc->num_ct = num_ct; + gc->irq_base = irq_base; + gc->reg_base = reg_base; + gc->chip_types->chip.name = name; + gc->chip_types->handler = handler; +} + /** * irq_alloc_generic_chip - Allocate a generic chip and initialize it * @name: Name of the irq chip @@ -206,17 +219,31 @@ irq_alloc_generic_chip(const char *name, int num_ct, unsigned int irq_base, gc = kzalloc(sz, GFP_KERNEL); if (gc) { - raw_spin_lock_init(&gc->lock); - gc->num_ct = num_ct; - gc->irq_base = irq_base; - gc->reg_base = reg_base; - gc->chip_types->chip.name = name; - gc->chip_types->handler = handler; + irq_init_generic_chip(gc, name, num_ct, irq_base, reg_base, + handler); } return gc; } EXPORT_SYMBOL_GPL(irq_alloc_generic_chip); +static void +irq_gc_init_mask_cache(struct irq_chip_generic *gc, enum irq_gc_flags flags) +{ + struct irq_chip_type *ct = gc->chip_types; + u32 *mskptr = &gc->mask_cache, mskreg = ct->regs.mask; + int i; + + for (i = 0; i < gc->num_ct; i++) { + if (flags & IRQ_GC_MASK_CACHE_PER_TYPE) { + mskptr = &ct[i].mask_cache_priv; + mskreg = ct[i].regs.mask; + } + ct[i].mask_cache = mskptr; + if (flags & IRQ_GC_INIT_MASK_CACHE) + *mskptr = irq_reg_readl(gc->reg_base + mskreg); + } +} + /* * Separate lockdep class for interrupt chip which can nest irq_desc * lock. @@ -242,21 +269,12 @@ void irq_setup_generic_chip(struct irq_chip_generic *gc, u32 msk, struct irq_chip_type *ct = gc->chip_types; struct irq_chip *chip = &ct->chip; unsigned int i; - u32 *mskptr = &gc->mask_cache, mskreg = ct->regs.mask; raw_spin_lock(&gc_lock); list_add_tail(&gc->list, &gc_list); raw_spin_unlock(&gc_lock); - for (i = 0; i < gc->num_ct; i++) { - if (flags & IRQ_GC_MASK_CACHE_PER_TYPE) { - mskptr = &ct[i].mask_cache_priv; - mskreg = ct[i].regs.mask; - } - ct[i].mask_cache = mskptr; - if (flags & IRQ_GC_INIT_MASK_CACHE) - *mskptr = irq_reg_readl(gc->reg_base + mskreg); - } + irq_gc_init_mask_cache(gc, flags); for (i = gc->irq_base; msk; msk >>= 1, i++) { if (!(msk & 0x01)) |