linux-kernel - Re: [PATCH v3 8/9] usb: chipidea: move usb_otg into struct ci

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Date:	Fri, 29 Aug 2014 16:25:35 +0200
From:	Antoine Tenart <antoine.tenart@...e-electrons.com>
To:	Peter Chen <peter.chen@...escale.com>
Cc:	Antoine Ténart 
	<antoine.tenart@...e-electrons.com>, 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

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.

> > 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?

> > -	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
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