linux-kernel - Re: [PATCH v6 2/3] usb: phy: Add Qualcomm SS-USB and HS-USB drivers for DW PHY's

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Message-ID: <1382456363.2837.10.camel@iivanov-dev.int.mm-sol.com>
Date:	Tue, 22 Oct 2013 18:39:23 +0300
From:	"Ivan T. Ivanov" <iivanov@...sol.com>
To:	Mark Rutland <mark.rutland@....com>
Cc:	Stanimir Varbanov <svarbanov@...sol.com>,
	"balbi@...com" <balbi@...com>,
	"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
	Pawel Moll <Pawel.Moll@....com>,
	"swarren@...dotorg.org" <swarren@...dotorg.org>,
	"ian.campbell@...rix.com" <ian.campbell@...rix.com>,
	"rob@...dley.net" <rob@...dley.net>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	"idos@...eaurora.org" <idos@...eaurora.org>,
	"mgautam@...eaurora.org" <mgautam@...eaurora.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH v6 2/3] usb: phy: Add Qualcomm SS-USB and HS-USB drivers
 for DW PHY's


Hi, 

On Tue, 2013-10-22 at 15:32 +0100, Mark Rutland wrote: 
> [...]
> 
> > > > +   phy->sleep_a_clk = devm_clk_get(phy->dev, "sleep_a");
> > >
> > > What means the "_a" in clock name?
> > 
> > They are 2 PHY's on 8074 chip. This drivers is supposed to
> > operate on PHY 0, thus sleep_a. PHY 1 is using sleep_b. Take a look
> > here http://www.spinics.net/lists/arm-kernel/msg276945.html
> 
> When you say two PHYs, do you mean the HS PHY and the SS PHY?
> 
> Or are there two HS PHYs? If so, would the other HS PHY have a sleep_b clock?

I think that this is the case.

> 
> The clock-names property should describe the clocks from the view of the device
> itself. As we're describing the PHY in isolation, rather than a big block that
> contains the PHY, the presesnce or absence of other PHYs should not affect the
> name. If the "_a" suffix is only to differentiate the instance of PHY, it
> should be dropped.


Ok. This was left from earlier platform code. I will change it.

Thanks,
Ivan

> 
> Thanks,
> Mark.
> --


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