[Openipmi-developer] [patch 1/1] ipmi: add autosensing of ipmi device on powerpc using device-tree

[Arnd Bergmann]

On Saturday 09 December 2006 10:46, Segher Boessenkool wrote:
> How do you know?  Some later compatible implementation might add
> some regs.  Also, there are implementations that simply ignore
> the lower address bits, so size=1 in the "reg" property is wrong
> for those.
> 
> > but depending on the HW implementation, they may be
> > between 1 and 4 bytes wide, and can have a different spacing.
> 
> Always one byte wide.

AFAICS, some implementations require word access on the registers,
even if only part of it is used. That's why the driver has
the concept of reg-size and reg-shift.

	Arnd <><