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PNPACPI: extend irq_flags() to set IORESOURCE_IRQ_SHAREABLE when appropriate 

This simplifies IRQ resource parsing slightly by computing all the
IORESOURCE_IRQ_* flags at the same time.

This also keeps track of shareability information when parsing options
from _PRS.  Previously we ignored shareability in _PRS.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-By: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bjorn Helgaas 2008-04-28 16:34:02 -06:00 committed by Len Brown
parent bb84b41d1a
commit cd7ec927d9
1 changed files with 15 additions and 11 deletions
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26
drivers/pnp/pnpacpi/rsparser.c
View File

@ -32,19 +32,26 @@
/*
* Allocated Resources
*/
static int irq_flags(int triggering, int polarity)
static int irq_flags(int triggering, int polarity, int shareable)
{
int flags;
if (triggering == ACPI_LEVEL_SENSITIVE) {
if (polarity == ACPI_ACTIVE_LOW)
return IORESOURCE_IRQ_LOWLEVEL;
flags = IORESOURCE_IRQ_LOWLEVEL;
else
return IORESOURCE_IRQ_HIGHLEVEL;
flags = IORESOURCE_IRQ_HIGHLEVEL;
} else {
if (polarity == ACPI_ACTIVE_LOW)
return IORESOURCE_IRQ_LOWEDGE;
flags = IORESOURCE_IRQ_LOWEDGE;
else
return IORESOURCE_IRQ_HIGHEDGE;
flags = IORESOURCE_IRQ_HIGHEDGE;
}
if (shareable)
flags |= IORESOURCE_IRQ_SHAREABLE;
return flags;
}
static void decode_irq_flags(int flag, int *triggering, int *polarity)
@ -110,16 +117,13 @@ static void pnpacpi_parse_allocated_irqresource(struct pnp_resource_table *res,
}
res->irq_resource[i].flags = IORESOURCE_IRQ; // Also clears _UNSET flag
res->irq_resource[i].flags |= irq_flags(triggering, polarity);
res->irq_resource[i].flags |= irq_flags(triggering, polarity, shareable);
irq = acpi_register_gsi(gsi, triggering, polarity);
if (irq < 0) {
res->irq_resource[i].flags |= IORESOURCE_DISABLED;
return;
}
if (shareable)
res->irq_resource[i].flags |= IORESOURCE_IRQ_SHAREABLE;
res->irq_resource[i].start = irq;
res->irq_resource[i].end = irq;
pcibios_penalize_isa_irq(irq, 1);
@ -441,7 +445,7 @@ static __init void pnpacpi_parse_irq_option(struct pnp_option *option,
for (i = 0; i < p->interrupt_count; i++)
if (p->interrupts[i])
__set_bit(p->interrupts[i], irq->map);
irq->flags = irq_flags(p->triggering, p->polarity);
irq->flags = irq_flags(p->triggering, p->polarity, p->sharable);
pnp_register_irq_resource(option, irq);
}
@ -461,7 +465,7 @@ static __init void pnpacpi_parse_ext_irq_option(struct pnp_option *option,
for (i = 0; i < p->interrupt_count; i++)
if (p->interrupts[i])
__set_bit(p->interrupts[i], irq->map);
irq->flags = irq_flags(p->triggering, p->polarity);
irq->flags = irq_flags(p->triggering, p->polarity, p->sharable);
pnp_register_irq_resource(option, irq);
}