Re: [RFC 2.6.27 1/1] gpiolib: add support for batch set of pins

[David Brownell]

On Sunday 28 December 2008, Ben Nizette wrote:
> > > gpio_set_batch(DB0, value, 0xFFFF, 16)
> > > 
> > > which has the nice performance benefit of skipping all the bit
> > > counting in the most common use case scenario.
> > 
> > but has the requirement that the driver know exactly the board level 
> > impmentation details (something that doesn't sound generic).
> 
> The original use case for these batch operations was in a fastpath -
> setting data lines on a framebuffer.

And the rationale for generalizing them was to let such fastpaths
stop being board-specific hacks.  :)


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