Thread (23 messages) 23 messages, 9 authors, 2011-06-15

Re: [RFC,PATCH] Cleanup PC parallel port Kconfig

From: Russell King - ARM Linux <hidden>
Date: 2011-06-15 07:47:50
Also in: linux-alpha, linux-arch, linux-arm-kernel, linux-m68k, linux-mips

On Tue, Jun 14, 2011 at 09:30:47PM -0700, H. Peter Anvin wrote:
On 06/14/2011 02:33 PM, Arnd Bergmann wrote:
quoted
quoted
Why on earth restrict it like that?  It's just a device driver, like
more or less any other device driver...
I'd say any other classic ISA/PC driver, including floppy, gameport or
serial-8250. One problem with these is that we never fully worked out
the dependencies for these, which we probably should. CONFIG_ISA
generally means ISA add-on cards, but that might not be enabled for
platforms that have a pc-parport but no ISA slots.
OK, serial-8250 is clearly just plain wrong, since the 8250 series UARTs
are ubiquitous across just about every platform.

Floppy is special (in the short bus sense), since it is closely tied to
ISA DMA.  Conditionalizing this on ISA DMA makes total sense.
No it doesn't.  It depends on the ISA DMA API, not that the machine has
ISA DMA.

I have a platform which has no ISA DMA but uses the floppy driver.  Please
don't break it.
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