From: arnd@arndb•de (Arnd Bergmann)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH] ARM: DTS: am33xx: Use the new DT bindings for the eDMA3
Date: Tue, 08 Dec 2015 10:51:50 +0100 [thread overview]
Message-ID: <4387766.cHF7OBX0cm@wuerfel> (raw)
In-Reply-To: <566689E2.7060907@ti.com>
On Tuesday 08 December 2015 09:42:26 Peter Ujfalusi wrote:
> On 12/04/2015 11:51 PM, Tony Lindgren wrote:
> >>
> >> Please just drop the /bits/ 16 and use normal cells.
> >
> > Yeah agreed, makes things less confusing for sure
>
> 4.4 will be the first kernel where we will have the new eDMA bindings. I have
> chosen to use 16bit array for specifying the channels used for memcpy
> (ti,edma-memcpy-channels) and for the reserving paRAM slots
> (ti,edma-reserved-slot-ranges). As of now we have maximum of 64 channels and
> 512 paRAM slots. 16bit is more than enough to store this information and it
> even gives us enough room if ever in the future these numbers are going to
> increase (which they are not).
>
> But in order to change them to 32bit the driver needs to be changed as well.
> Currently we do not have drivers (in 4.4) using the new bindings, 4.4 is not
> yet out, so it might be possible to change the binding document and the driver
> to use 32bit arrays. The driver internally uses 16bit type for these which I'm
> not going to change, but the code parsing the DT needs to be adjusted for the
> new data type.
>
> If Vinod is willing to take update for the DT binding of eDMA for 4.4-rc, I
> can cook up the patch(es) to do so.
I hadn't realized that it was already in 4.4-rc. The change should be trivial
enough though, so I'd still do it. If Vinod would rather not change it now,
it's not overly important though.
Arnd
next prev parent reply other threads:[~2015-12-08 9:51 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-04 10:45 [PATCH] ARM: DTS: am33xx: Use the new DT bindings for the eDMA3 Peter Ujfalusi
2015-12-04 17:21 ` Felipe Balbi
2015-12-04 18:47 ` Tony Lindgren
2015-12-04 21:36 ` Arnd Bergmann
2015-12-04 21:51 ` Tony Lindgren
2015-12-08 7:42 ` Peter Ujfalusi
2015-12-08 9:51 ` Arnd Bergmann [this message]
2015-12-08 10:22 ` Peter Ujfalusi
2015-12-08 10:25 ` Arnd Bergmann
2015-12-08 15:51 ` Tony Lindgren
2015-12-08 0:19 ` Tony Lindgren
2015-12-08 7:43 ` Peter Ujfalusi
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