[patch 14/37] PNPACPI: extend irq_flags() to set IORESOURCE_IRQ_SHAREABLE when appropriate

Bjorn Helgaas
2008-04-01T15:18:06Z

[-- Attachment #1: pnpacpi-add-shareability-to-irq-flags --]
[-- Type: text/plain, Size: 2514 bytes --]

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>

Index: work7/drivers/pnp/pnpacpi/rsparser.c
===================================================================
--- work7.orig/drivers/pnp/pnpacpi/rsparser.c 2008-03-21 15:10:22.000000000 -0600
+++ work7/drivers/pnp/pnpacpi/rsparser.c 2008-03-21 15:10:23.000000000 -0600
@@ -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)
@@ -108,16 +115,13 @@
}

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);
@@ -439,7 +443,7 @@
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);
}
@@ -459,7 +463,7 @@
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);
}

--