linux-kernel - Re: [PATCH v2 1/4] dwc3: exynos: Add support for SCLK present on Exynos7

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Date:	Tue, 14 Oct 2014 10:25:00 +0530
From:	Vivek Gautam <gautam.vivek@...sung.com>
To:	Felipe Balbi <balbi@...com>
Cc:	Anton Tikhomirov <av.tikhomirov@...sung.com>,
	Linux USB Mailing List <linux-usb@...r.kernel.org>,
	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Greg KH <gregkh@...uxfoundation.org>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Mark Rutland <mark.rutland@....com>,
	Pawel Moll <pawel.moll@....com>,
	"robh+dt" <robh+dt@...nel.org>, kishon <kishon@...com>
Subject: Re: [PATCH v2 1/4] dwc3: exynos: Add support for SCLK present on Exynos7

Hi Felipe,


On Tue, Oct 14, 2014 at 4:14 AM, Felipe Balbi <balbi@...com> wrote:
> Hi,
>
> On Mon, Oct 13, 2014 at 01:54:59PM +0900, Anton Tikhomirov wrote:
>> Hi Vivek,
>>
>> > Exynos7 also has a separate special gate clock going to the IP
>> > apart from the usual AHB clock. So add support for the same.
>>
>> As we discussed before, Exynos7 SoCs have 7 clocks to be controlled
>> by the driver. Adding only sclk is not enough.
>>
>> >
>> > Signed-off-by: Vivek Gautam <gautam.vivek@...sung.com>
>> > ---
>> >  drivers/usb/dwc3/dwc3-exynos.c |   16 ++++++++++++++++
>> >  1 file changed, 16 insertions(+)
>> >
>> > diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-
>> > exynos.c
>> > index 3951a65..7dc6a98 100644
>> > --- a/drivers/usb/dwc3/dwc3-exynos.c
>> > +++ b/drivers/usb/dwc3/dwc3-exynos.c
>> > @@ -35,6 +35,7 @@ struct dwc3_exynos {
>> >     struct device           *dev;
>> >
>> >     struct clk              *clk;
>>
>> The clock "clk" in Exynos5 just gated all that above 7 clocks, which
>> we should control separately now in Exynos7.
>>
>
> should I drop this patch for now ?

Yes, better to hold this for some time till we get more clarity
from our h/w team.


-- 
Best Regards
Vivek Gautam
Samsung R&D Institute, Bangalore
India
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