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authorBjorn Helgaas <bjorn.helgaas@hp.com>2007-05-08 00:36:07 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-08 11:15:23 -0700
commit7e92b4fc345f5b6f57585fbe5ffdb0f24d7c9b26 (patch)
treea8e9dac38a9c8dd22bd182c13e2ae0e6d32bd729 /drivers
parentd0d4f69bb65a8c1c1430c577a583632709b874c6 (diff)
x86, serial: convert legacy COM ports to platform devices
Make x86 COM ports into platform devices and don't probe for them if we have PNP. This prevents double discovery, where a device was found both by the legacy probe and by 8250_pnp, e.g., serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A 00:02: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A This also means IRDA devices without a UART PNP ID will no longer be claimed by the serial driver, which might require changes in IRDA drivers and administration. In addition to this patch, you may need to configure a setserial init script, e.g., /etc/init.d/setserial, so it doesn't poke legacy UART stuff back in. On Debian, "dpkg-reconfigure setserial" with the "kernel" option does this. To force the old legacy probe behavior even when we have PNPBIOS or ACPI, load the new legacy_serial module (or build 8250 static) with the "legacy_serial.force" option. [akpm@linux-foundation.org: fix makefiles] Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Keith Owens <kaos@ocs.com.au> Cc: Len Brown <lenb@kernel.org> Cc: Adam Belay <ambx1@neo.rr.com> Cc: Matthieu CASTET <castet.matthieu@free.fr> Cc: Jean Tourrilhes <jt@hpl.hp.com> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: Ville Syrjala <syrjala@sci.fi> Cc: Russell King <rmk+serial@arm.linux.org.uk> Cc: Samuel Ortiz <samuel@sortiz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/serial/Kconfig14
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 924e9bd757f..e8efe938c4e 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -73,17 +73,21 @@ config SERIAL_8250_PCI
depends on SERIAL_8250 && PCI
default SERIAL_8250
help
- This builds standard PCI serial support. You may be able to
- disable this feature if you only need legacy serial support.
- Saves about 9K.
+ Say Y here if you have PCI serial ports.
+
+ To compile this driver as a module, choose M here: the module
+ will be called 8250_pci.
config SERIAL_8250_PNP
tristate "8250/16550 PNP device support" if EMBEDDED
depends on SERIAL_8250 && PNP
default SERIAL_8250
help
- This builds standard PNP serial support. You may be able to
- disable this feature if you only need legacy serial support.
+ Say Y here if you have serial ports described by PNPBIOS or ACPI.
+ These are typically ports built into the system board.
+
+ To compile this driver as a module, choose M here: the module
+ will be called 8250_pnp.
config SERIAL_8250_HP300
tristate