Re: [PATCH] dp83640: Get gpio and master/slave configuration from DT

[Mark Rutland <mark.rutland@arm.com>]

On Mon, Feb 10, 2014 at 03:25:15PM +0000, Stefan Sørensen wrote:
> On Mon, 2014-02-10 at 13:42 +0000, Mark Rutland wrote:
> 
> > Binding document please.
> 
> Dang, I somehow managed to drop that from the patch. I will fix for the
> next version.

Cheers.

> 
> > > +	if (of_find_property(node, "dp83640,slave", NULL))
> > > +		dp83640->slave = true;
> > 
> > Use of_property_read_bool.
> 
> Fixed.
> 
> > > +	prop = of_find_property(node, "dp83640,perout-gpios", &proplen);
> > > +	if (prop) {
> > > +		if (dp83640->slave) {
> > > +			pr_err("dp83640,perout-gpios property can not be set together with dp83640,slave");
> > > +			return -EINVAL;
> > > +		}
> > > +
> > > +		clock->caps.n_per_out = proplen / sizeof(u32);
> > > +		if (clock->caps.n_per_out > N_EXT) {
> > > +			pr_err("dp83640,perout-gpios may not have more than %d entries",
> > > +			       N_EXT);
> > > +			return -EINVAL;
> > > +		}
> > > +		err = of_property_read_u32_array(node, "dp83640,perout-gpios",
> > > +						 clock->perout_gpios,
> > > +						 clock->caps.n_per_out);
> > > +		if (err < 0)
> > > +			return err;
> > > +	}
> > 
> > This looks nothing like the standard gpio bindings. What _exactly_ is
> > this property describing?
> 
> The dp83640 has a number of pins of which 8 of them can be used for
> either timestamping events or triggering changes at programmed
> intervals. These properties are used to configure which pins get
> assigned to what function.

Ok.

> 
> > If this is not using the standard gpio bindings then this should be
> > renamed.
> 
> Maybe a gpio->pin renaming?

That sounds good to me.

Thanks,
Mark.