[alsa-devel] [PATCH 04/14] soundwire: Add MIPI DisCo property helpers

[Vinod Koul]

On Sat, Oct 21, 2017 at 10:20:46AM +0100, Mark Brown wrote:
> On Thu, Oct 19, 2017 at 08:33:20AM +0530, Vinod Koul wrote:
> 
> > +	/* device is probed so let's read the properties now */
> > +	if (slave->ops && slave->ops->read_prop)
> > +		slave->ops->read_prop(slave);
> 
> Is it valid for us to not be able to read the properties?

Practically no. Without the values bus wont work

> 
> > +		fwnode_property_read_u32(node, "mipi-sdw-port-max-wordlength",
> > +						&dpn[i].max_word);
> > +		fwnode_property_read_u32(node, "mipi-sdw-port-min-wordlength",
> > +						&dpn[i].min_word);
> 
> Don't we know this stuff simply by virtue of knowing what device we're
> talking to (given that there aren't class devices)?

Well I think the spec is midway to device class so they added it to make it
generic :)

-- 
~Vinod