From d0051816e619f8f082582bec07ffa51bdb4f2104 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 6 May 2013 14:30:24 +0000 Subject: genirq: irqchip: Add a mask calculation function Some chips have weird bit mask access patterns instead of the linear you expect. Allow them to calculate the cached mask themself. Signed-off-by: Thomas Gleixner Cc: Thomas Petazzoni Cc: Andrew Lunn Cc: Russell King - ARM Linux Cc: Jason Cooper Cc: Arnd Bergmann Cc: Jean-Francois Moine Cc: devicetree-discuss@lists.ozlabs.org Cc: Rob Herring Cc: Jason Gunthorpe Cc: Gregory Clement Cc: Gerlando Falauto Cc: Rob Landley Acked-by: Grant Likely Cc: Maxime Ripard Cc: Ezequiel Garcia Cc: linux-arm-kernel@lists.infradead.org Cc: Sebastian Hesselbarth Link: http://lkml.kernel.org/r/20130506142539.302898834@linutronix.de Signed-off-by: Thomas Gleixner --- kernel/irq/generic-chip.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'kernel/irq') diff --git a/kernel/irq/generic-chip.c b/kernel/irq/generic-chip.c index 957155cebbac..5068fe3ae1af 100644 --- a/kernel/irq/generic-chip.c +++ b/kernel/irq/generic-chip.c @@ -240,6 +240,7 @@ void irq_setup_generic_chip(struct irq_chip_generic *gc, u32 msk, unsigned int set) { 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; @@ -267,9 +268,12 @@ void irq_setup_generic_chip(struct irq_chip_generic *gc, u32 msk, if (!(flags & IRQ_GC_NO_MASK)) { struct irq_data *d = irq_get_irq_data(i); - d->mask = 1 << (i - gc->irq_base); + if (chip->irq_calc_mask) + chip->irq_calc_mask(d); + else + d->mask = 1 << (i - gc->irq_base); } - irq_set_chip_and_handler(i, &ct->chip, ct->handler); + irq_set_chip_and_handler(i, chip, ct->handler); irq_set_chip_data(i, gc); irq_modify_status(i, clr, set); } -- cgit v1.2.3