Re: How to properly wait for transaction completion?

[Vincent DEFERT <vincent.defert%posteo.net@localhost>]

Thanks! Once you know what to look for, NetBSD's documentation is 
excellent and its source code is crystal clear. :)

On 28/09/2022 22:34, Jason Thorpe wrote:
> > On Sep 28, 2022, at 1:24 PM, Vincent DEFERT <vincent.defert%posteo.net@localhost> wrote:
> >
> > Hi,
> >
> > I'm working on an I2C driver for the ODROID C2 and I wonder how I should do to detect the end of a transaction.
> > Ideally, once the transaction is started, I'd like to wait in my exec() function for a "signal" raised by the interrupt handler, so as to avoid a busy wait.
> > Is this the correct approach? Which API should I use?
> I’m most familiar with the RPI’s i2c driver:
>
> 	sys/arch/arm/broadcom/bcm2835_bsc.c
>
> While the overall state machine structure might not suit your driver, how to use the condition variable APIs can be seen in bsciic_exec() and bsciic_signal().
>
> -- thorpej