| Message ID | 987664A83D2D224EAE907B061CE93D5301E7281306@orsmsx505.amr.corp.intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 06/14/2011 03:08 PM, Luck, Tony wrote: > diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig > index 38280ef..849805a 100644 > --- a/arch/ia64/Kconfig > +++ b/arch/ia64/Kconfig > @@ -23,6 +23,7 @@ config IA64 > select HAVE_ARCH_TRACEHOOK > select HAVE_DMA_API_DEBUG > select HAVE_GENERIC_HARDIRQS > + select HAVE_PC_PARPORT > select GENERIC_IRQ_PROBE > select GENERIC_PENDING_IRQ if SMP > select IRQ_PER_CPU > > I took a look at the back of all my ia64 systems - none of them > have a parallel port. It seems unlikely that new systems will > start adding parallel ports :-) > > So even if I had a printer (or other device) that used a parallel > port, I have no way to test it. > If it has PCI slots, it can have a parallel port. -hpa
On Tue, Jun 14, 2011 at 09:31:27PM -0700, H. Peter Anvin wrote: > On 06/14/2011 03:08 PM, Luck, Tony wrote: > > I took a look at the back of all my ia64 systems - none of them > > have a parallel port. It seems unlikely that new systems will > > start adding parallel ports :-) > > > > So even if I had a printer (or other device) that used a parallel > > port, I have no way to test it. > > If it has PCI slots, it can have a parallel port. Is that a clue about where a select statement should be?
On 06/15/2011 12:39 AM, Russell King - ARM Linux wrote: > On Tue, Jun 14, 2011 at 09:31:27PM -0700, H. Peter Anvin wrote: >> On 06/14/2011 03:08 PM, Luck, Tony wrote: >>> I took a look at the back of all my ia64 systems - none of them >>> have a parallel port. It seems unlikely that new systems will >>> start adding parallel ports :-) >>> >>> So even if I had a printer (or other device) that used a parallel >>> port, I have no way to test it. >> >> If it has PCI slots, it can have a parallel port. > > Is that a clue about where a select statement should be? Not really, because it's a sufficient condition, not a required one. All a platform needs to expose a PC-style parallel port interface is a minimum of 3 contiguous I/O locations, and although in the PC they are I/O mapped, they don't need to be. The basic (SPP) parallel port interface is really just a glorified set of GPIOs and could at least in theory be implemented as-is on any platform with contiguous GPIO ports. The faster modes (EPP and ECP) do contain logic, and ECP depends on the ISA DMA API (thanks to Russell for pointing out that actual ISA DMA is not required, any slave DMA solution will do.) -hpa
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index 38280ef..849805a 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -23,6 +23,7 @@ config IA64 select HAVE_ARCH_TRACEHOOK select HAVE_DMA_API_DEBUG select HAVE_GENERIC_HARDIRQS + select HAVE_PC_PARPORT select GENERIC_IRQ_PROBE select GENERIC_PENDING_IRQ if SMP select IRQ_PER_CPU