Re: [PATCH 1/3] i2c: slave: rework the slave API

From: Uwe Kleine-König
Date: Fri Mar 20 2015 - 03:45:08 EST


On Fri, Mar 20, 2015 at 08:31:35AM +0100, Wolfram Sang wrote:
>
> > > > > After more discussion, brave users, and additional datasheet evaluation,
> > > > > some API updates for the new I2C slave framework became imminent. The
> > > > > slave events now get some easier to understand naming. Also, the event
> > > > > handling has been simplified to only send one event per interrupt.
> > > > what is an interrupt here? An event where the bus driver needs feedback
> > > > from the backend?
> > >
> > > More the other way around: when the bus driver needs to notify the
> > > backend. I wasn't 100% sure about the word 'interrupt', but then decided
> > > a HW slave support without interrupts would be so rare and adventurous
> > > that it is okay to use the term :)
> > Yeah, I agree on HW slave support without interrupts is hardly possible.
> > But I imagine that controllers differ in which situations they can issue
> > an interrupt so talking about them for generic code feels strange to me
> > because $flexiblecontrolerwithvariousirqs doesn't need to send more
> > events than $bareminimumcontroler.
>
> Do you have a better word at hand? "...to send one event per event"? :)
Maybe:

Also, the event handling has been simplified to only need a
single call to the slave callback when an action by the backend
is required.

Best regards
Uwe

--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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