From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>,
Vinod Koul <vinod.koul@intel.com>,
linux-kernel@vger.kernel.org,
spear-devel <spear-devel@list.st.com>
Subject: Re: [PATCH] dw_dmac: adjust slave_id accordingly to request line base
Date: Wed, 30 Jan 2013 10:07:54 +0200 [thread overview]
Message-ID: <1359533274.31148.52.camel@smile> (raw)
In-Reply-To: <CAOh2x==Ng1=iHOj-55mUTWCwpaJpRXjiQyfxz-a48ALDOW3aiA@mail.gmail.com>
On Wed, 2013-01-30 at 13:31 +0530, Viresh Kumar wrote:
> On Wed, Jan 30, 2013 at 1:02 PM, Andy Shevchenko
> <andriy.shevchenko@linux.intel.com> wrote:
> > We get a device from the ACPI CSRT table. During enumeration we don't
> > know what kind of the device it is. From the enumeration point of view
> > each device enumerated from CSRT is a platform device (see
> > drivers/acpi/csrt.c for the details).
> >
> > That's why we have to pass this info somehow to the DMAC driver. And
> > like Mika already mentioned we have no other generic way except
> > IORESOURCE_DMA. If you have something better in mind, please share. We
> > could adopt our code then.
>
> You don't need this in DT case too?
I think no. It seems the DT has a proper backlink from the slave device
to the dmac ("dma-names" property if I understood it correctly).
> Or only for ACPI case?
ACPI 5 case only until now.
We would like to initiate the proposal to the ACPI specification
team/whoever to have this part designed better in next versions.
> I think "Yes" is the answer of both the questions. If so, then you
> can keep it this way or add another variable in platform data.
--
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Intel Finland Oy
next prev parent reply other threads:[~2013-01-30 8:08 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-28 11:04 [PATCH] dw_dmac: adjust slave_id accordingly to request line base Andy Shevchenko
2013-01-29 4:59 ` Viresh Kumar
2013-01-29 5:22 ` Mika Westerberg
2013-01-29 15:27 ` Viresh Kumar
2013-01-30 7:32 ` Andy Shevchenko
2013-01-30 8:01 ` Viresh Kumar
2013-01-30 8:07 ` Andy Shevchenko [this message]
2013-02-07 13:22 ` Shevchenko, Andriy
2013-02-12 15:56 ` Vinod Koul
2013-02-12 16:34 ` Andy Shevchenko
2013-02-12 15:53 ` Vinod Koul
2013-02-12 16:43 ` Mika Westerberg
2013-02-12 17:34 ` Vinod Koul
2013-02-12 19:02 ` Mika Westerberg
2013-02-14 9:57 ` Vinod Koul
2013-02-14 10:17 ` Mika Westerberg
2013-02-07 13:28 ` Viresh Kumar
2013-02-19 9:02 ` Andy Shevchenko
2013-02-19 22:17 ` Rafael J. Wysocki
2013-02-20 6:04 ` Vinod Koul
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