From: shawn.guo@freescale.com (Shawn Guo)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 5/6] ARM: mxc: all three imx51 TOs use TO1 version of sdma script
Date: Wed, 15 Jun 2011 12:29:49 +0800 [thread overview]
Message-ID: <20110615042948.GB31712@S2100-06.ap.freescale.net> (raw)
In-Reply-To: <20110614203809.GA23771@pengutronix.de>
On Tue, Jun 14, 2011 at 10:38:09PM +0200, Sascha Hauer wrote:
> On Tue, Jun 14, 2011 at 02:20:07PM +0800, Shawn Guo wrote:
> > Though there are three TOs of imx51 soc, the sdma script never
> > changes since TO1, which means all three TOs of imx51 uses TO1
> > version of sdma script.
> >
> > The current code passes TO number to imx-sdma driver to load
> > different firmware for different TO. That means we have to prepare
> > 3 identical firmwares, sdma-imx51-to1.bin sdma-imx51-to2.bin and
> > sdma-imx51-to3.bin, to have the kernel capable of running on all
> > three TOs. This just makes no sense.
> >
> > The patch removes the TO number passing and get the default TO1
> > version of sdma firmware work for all TOs.
>
> I don't agree to this approach. The SDMA firmware has been different on
> all TO versions of earlier i.MXs. For the linearity of the universe we
> should keep this. What about providing a link in userspace?
>
The fact is that mx31 and mx35 are the only two SoCs (relatively old
ones) that have different SDMA firmwares on different TOs. The
relatively new ones, mx25 (TO1, TO1.1), mx50 (TO1, TO1.1), mx51
(TO1, TO2, TO3) and mx53 (TO1, TO2) all have one version SDMA
firmware for different TOs. I do not see the mx31/35 case is a
linearity of the universe. Do we really want to bother ourselves
with userspace link on so many latest SoCs?
--
Regards,
Shawn
next prev parent reply other threads:[~2011-06-15 4:29 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-13 7:37 [PATCH 0/6] Some fixes and cleanup on imx-dma device registration Shawn Guo
2011-06-13 7:37 ` [PATCH 1/6] ARM: mxc: imx-sdma device gets 16K iosize than 4K Shawn Guo
2011-06-13 7:37 ` [PATCH 2/6] ARM: mxc: sdma on imx25 is a V2 block Shawn Guo
2011-06-13 7:37 ` [PATCH 3/6] ARM: mxc: change imx-dma default to_version to 1 Shawn Guo
2011-06-13 7:37 ` [PATCH 4/6] ARM: mxc: imx-dma on imx25 has no other TO version but TO1 Shawn Guo
2011-06-13 7:37 ` [PATCH 5/6] ARM: mxc: all three imx51 TOs use TO1 version of sdma script Shawn Guo
2011-06-13 12:36 ` Fabio Estevam
2011-06-13 13:05 ` Shawn Guo
2011-06-14 6:20 ` [PATCH v2 " Shawn Guo
2011-06-14 20:38 ` Sascha Hauer
2011-06-15 4:29 ` Shawn Guo [this message]
2011-06-16 7:30 ` Sascha Hauer
2011-06-16 11:51 ` Shawn Guo
2011-06-17 1:59 ` Fabio Estevam
2011-06-17 2:27 ` Shawn Guo
2011-06-20 7:20 ` Sascha Hauer
2011-06-13 7:37 ` [PATCH 6/6] ARM: mxc: clean up imx-dma device registration Shawn Guo
2011-06-20 14:50 ` Shawn Guo
2011-06-21 14:41 ` Shawn Guo
2011-06-21 15:13 ` Wolfram Sang
2011-06-22 2:43 ` Shawn Guo
2011-06-22 6:33 ` Wolfram Sang
2011-06-21 22:57 ` Sascha Hauer
2011-06-22 2:53 ` Shawn Guo
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20110615042948.GB31712@S2100-06.ap.freescale.net \
--to=shawn.guo@freescale.com \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.