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Date:	Mon, 1 Sep 2014 09:13:43 +0800
From:	Peter Chen <peter.chen@...escale.com>
To:	Antoine Tenart <antoine.tenart@...e-electrons.com>
CC:	<balbi@...com>, <gregkh@...uxfoundation.org>, <kishon@...com>,
	<stern@...land.harvard.edu>, <sergei.shtylyov@...entembedded.com>,
	<yoshihiro.shimoda.uh@...esas.com>,
	<alexandre.belloni@...e-electrons.com>,
	<thomas.petazzoni@...e-electrons.com>, <zmxu@...vell.com>,
	<jszhang@...vell.com>, <linux-usb@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 8/9] usb: chipidea: move usb_otg into struct ci_hdrc

On Fri, Aug 29, 2014 at 04:25:35PM +0200, Antoine Tenart wrote:
> Hi,
> 
> On Tue, Aug 26, 2014 at 06:22:40PM +0800, Peter Chen wrote:
> > On Fri, Aug 22, 2014 at 05:50:19PM +0200, Antoine Ténart wrote:
> > 
> > If the common usb_otg and usb_phy struct still has another's pointer, you
> > may not need to add this patch.
> 
> Except if we want to access the OTG member when not using an USB PHY.

If there is no USB PHY, the probe at core.c will turn error.
> 
> > > diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
> > > index 0b67d78dd953..0952d4adfa4c 100644
> > > --- a/drivers/usb/chipidea/host.c
> > > +++ b/drivers/usb/chipidea/host.c
> > > @@ -85,13 +85,11 @@ static int host_start(struct ci_hdrc *ci)
> > >  	if (ret) {
> > >  		goto disable_reg;
> > >  	} else {
> > > -		struct usb_otg *otg = ci->usb_phy->otg;
> > > +		struct usb_otg *otg = &ci->otg;
> > >  
> > >  		ci->hcd = hcd;
> > > -		if (otg) {
> > > -			otg->host = &hcd->self;
> > > -			hcd->self.otg_port = 1;
> > > -		}
> > > +		otg->host = &hcd->self;
> > > +		hcd->self.otg_port = 1;
> > >  	}
> > 
> > You may need use other way to identify if otg is supported or not
> 
> How would you do that?


ci_otg_is_fsm_mode(ci)

> 
> > > -	otg->usb_phy = ci->usb_phy;
> > > -	otg->gadget = &ci->gadget;
> > > -	ci->fsm.otg = otg;
> > > -	ci->usb_phy->otg = ci->fsm.otg;
> > > +	ci->otg.usb_phy = ci->usb_phy;
> > > +	ci->fsm.otg = &ci->otg;
> > >  	ci->fsm.power_up = 1;
> > >  	ci->fsm.id = hw_read_otgsc(ci, OTGSC_ID) ? 1 : 0;
> > >  	ci->fsm.otg->state = OTG_STATE_UNDEFINED;
> > 
> > Why otg->gadget and ci->usb_phy->otg initialization are deleted?
> > At least, the parameters of usb_otg_state_string at your 7th patch uses it.
> 
> Sure, I'll fix this
> 
> Antoine
> 
> -- 
> Antoine Ténart, Free Electrons
> Embedded Linux, Kernel and Android engineering
> http://free-electrons.com

-- 
Best Regards,
Peter Chen
--
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