[U-Boot] [PATCH v8 4/4] Add USB support for Efika

[Marek Vasut <marek.vasut@gmail.com>]

On Wednesday, September 28, 2011 08:12:08 PM Jana Rapava wrote:
> 2011/9/28 Marek Vasut <marek.vasut.n900@gmail.com>
> 
> > > +    if (!timeout)
> > > +        return -1;
> > > +    else
> > > +        return tmp;
> > > +}
> > 
> > Won't 'return !timeout;' be enough?
> > 
> > > +    tmp = ulpi_wait(ehci, ULPI_RWRUN);
> > 
> > +    if (tmp == -1) {
> > +        printf("ULPI read timed out\n");
> > +        return 0;
> > +    }
> > +    return ulpi_read_mask(tmp);
> > +}
> 
> Here in ulpi_read() I need to store and return value which was read in
> ulpi_wait(). What is the proper way to do this, If ulpi_wait() should
> return !timeout ?

You can read again ... it's more systematic. Anyway ... use the approach below, 
it seems better.

> 
> > Also, can you change 'ulpi_bit' to 'ulpi_mask'? That seems more
> > appropriate.
> > 
> > Maybe this can be even changed to ulpi_wait(ehci, value_to_be_written,
> > bit_to_be_polled), then you won't need those writel()s before every write
> > to ulpi anymore.
> 
> Ok.
> 
> > cheers