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authorBjorn Helgaas <bjorn.helgaas@hp.com>2006-07-03 09:24:12 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-04 00:26:58 +0200
commitcb6358eb69d9854f65f2979c0ce9280eee041828 (patch)
tree383765c090a291af222b08ae4044441d40a5d338 /drivers
parent[PATCH] PNPACPI: support shareable interrupts (diff)
downloadlinux-cb6358eb69d9854f65f2979c0ce9280eee041828.tar.xz
linux-cb6358eb69d9854f65f2979c0ce9280eee041828.zip
[PATCH] SERIAL: allow shared 8250_pnp interrupts
PNP devices can use shared interrupts, so check to see whether we'll need SA_SHIRQ for request_irq(). The builtin PDH UART on the HP rx8640 is an example of an ACPI/PNP device that uses a shareable level-triggered, active-low interrupt. The interrupt can be shared in very large I/O configurations or by artificially lowering IA64_DEF_LAST_DEVICE_VECTOR. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Adam Belay <ambx1@neo.rr.com> Cc: Matthieu Castet <castet.matthieu@free.fr> Cc: Li Shaohua <shaohua.li@intel.com> Cc: Len Brown <len.brown@intel.com> Acked-by: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/serial/8250_pnp.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/serial/8250_pnp.c b/drivers/serial/8250_pnp.c
index 739bc84f91e9..632f62d6ec7e 100644
--- a/drivers/serial/8250_pnp.c
+++ b/drivers/serial/8250_pnp.c
@@ -431,6 +431,8 @@ serial_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
#endif
port.flags |= UPF_SKIP_TEST | UPF_BOOT_AUTOCONF;
+ if (pnp_irq_flags(dev, 0) & IORESOURCE_IRQ_SHAREABLE)
+ port.flags |= UPF_SHARE_IRQ;
port.uartclk = 1843200;
port.dev = &dev->dev;