Re: [PATCH v3 13/13] platform/x86: intel_cht_int33fe: Replacing the old connections with references

Heikki Krogerus
2019-04-17T10:45:00Z

On Wed, Apr 17, 2019 at 12:15:18PM +0200, Hans de Goede wrote:
> Hi,
>
> On 17-04-19 11:32, Heikki Krogerus wrote:
> > On Wed, Apr 17, 2019 at 11:19:28AM +0200, Hans de Goede wrote:
>
> <snip>
>
> > > That is not going to work since the (virtual) mux / orientation-switch
> > > devices are only registered once the driver binds to the piusb30532 i2c
> > > device, so when creating the nodes we only have the piusb30532 i2c device.
> >
> > It's not a problem, that's why we have the software nodes. The nodes
> > can be created before the device entires. The node for pi3usb30532
> > will just be the parent node for the new nodes we add for the mux and
> > switch.
> >
> > > I've been thinking some more about this and an easy fix is to have separate
> > > fwnode_match functions for typec_switch_match and typec_mux_match and have
> > > them check that the dev_name ends in "-mux" resp. "-switch" that requires
> > > only a very minimal change to "usb: typec: Registering real device entries for the muxes"
> > > and then everything should be fine.
> >
> > I don't want to do anymore device name matching unless we have to, and
> > here we don't have to. We can name the nodes for those virtual mux and
> > switch, and then just do fwnode_find_named_child_node() in
> > pi3usb30532.c for both of them.
>
> Thinking more about this, I have a feeling that this makes things needlessly
> complicated, checking the dev_name *ends* in "-mux" resp. "-switch" should be
> 100% reliable since we call:
>
> dev_set_name(&sw->dev, "%s-switch", dev_name(parent));
> dev_set_name(&mux->dev, "%s-mux", dev_name(parent));
>
> When registering the switch / mux, so I believe doing name (suffix) comparison
> here is fine and much simpler. Anyways this is just my 2 cents on this, I'm
> happy with either solution, your choice.

You do have a point. I'll take a look how the two options look like,
but maybe your way is better after all.

thanks,

--
heikki