Scott Wood wrote:
It doesn't buy us anything in here, but it's conceivable that someone
may want to write a driver that uses a shift in the I/O accessor
rather than an array of port offsets,
It wouldn't be IDE driver then, and neither it would be libata
which also does this another way this (despite pata_platform uses
shifts too -- not in the accessors, so no speed loss).
The device tree is not just for Linux.
Yeah, and I can't wait to see some other its users. ;-)
This doesn't mean that shift is better anyway. If everyone considers it
better, I give up. But be warned that shift (stride) is not the only property
characterizing register accesses -- the regs might be only accessible as
16/32-bit quantities, for example (16-bit is a real world example -- from
Amiga or smth of that sort, IIRC).
equivalent of the cntlzw innstruction, and shift makes it clear that
the stride must be power-of-two). Plus, using shift is consistent
with what we do on ns16550.
Why the heck should we care about the UART code taling about IDE?!
Consistency?
We're not obliged to be consistent with every piece of the kernel code.
-Scott
MBR, Sergei
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