Commit cb6358eb authored Jul 03, 2006 by Bjorn Helgaas Committed by Linus Torvalds Jul 03, 2006

[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>

parent c32928c5

drivers/serial/8250_pnp.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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;