Re: [PATCH 1/4] USB: Fix of_usb_get_dr_mode_by_phy with a shared phy block

[Bin Liu <b-liu-l0cyMroinI0@public.gmane.org>]

Hi,

On Fri, Jun 03, 2016 at 12:34:35PM +0200, Hans de Goede wrote:
> Hi,
> 
> On 02-06-16 20:16, Bin Liu wrote:
> >Hi,
> >
> >On Thu, Jun 02, 2016 at 07:31:03PM +0200, Hans de Goede wrote:
> >>Some SoCs have a single phy-hw-block with multiple phys, this is
> >>modelled by a single phy dts node, so we end up with multiple
> >>controller nodes with a phys property pointing to the phy-node
> >>of the otg-phy.
> >>
> >>Only one of these controllers typically is an otg controller, yet we
> >
> >Is it guaranteed that only one of them will be otg?
> 
> I guess not, but if there are 2 then with my patch we are of no worse
> then today, we will then pick the first otg controller. Whereas

What if the first otg controller is not what we want? this patch does
not solve the problem. I would think Kishon's suggestion in another
email - seperate dt phy nodes - is a better option.

> of_usb_get_dr_mode_by_phy currently is broken even on setups with
> a shared phy dt-node and only 1 otg controller, which are quite
> common.

If that is the case, the model has to be changed. Otherwise, a single
phy driver is unable to handle different operations from multiple
controllers.

Regards,
-Bin.
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