From: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
To: linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 08/19] mmc: sdhi: Enable the driver on all ARM platforms
Date: Tue, 29 Oct 2013 12:12:49 +0000 [thread overview]
Message-ID: <526FA641.9090300@cogentembedded.com> (raw)
In-Reply-To: <4906973.ikaOXXr4gP@avalon>
Hello.
On 29-10-2013 13:52, Laurent Pinchart wrote:
>>> Renesas ARM platforms are transitioning from single-platform to
>>> multi-platform kernels using the new ARCH_SHMOBILE_MULTI. Make the
>>> driver available on all ARM platforms to enable it on both ARCH_SHMOBILE
>>> and ARCH_SHMOBILE_MULTI and increase build testing coverage.
>>> Cc: Chris Ball <cjb@laptop.org>
>>> Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
>>> Cc: Ian Molton <ian@mnementh.co.uk>
>>> Cc: linux-mmc@vger.kernel.org
>>> Signed-off-by: Laurent Pinchart
>>> <laurent.pinchart+renesas@ideasonboard.com>
[...]
>>> diff --git a/drivers/mmc/host/tmio_mmc_dma.c
>>> b/drivers/mmc/host/tmio_mmc_dma.c index 65edb4a..535bc35 100644
>>> --- a/drivers/mmc/host/tmio_mmc_dma.c
>>> +++ b/drivers/mmc/host/tmio_mmc_dma.c
>>> @@ -28,7 +28,7 @@ void tmio_mmc_enable_dma(struct tmio_mmc_host *host,
>>> bool enable)>
>>> if (!host->chan_tx || !host->chan_rx)
>>>
>>> return;
>>>
>>> -#if defined(CONFIG_SUPERH) || defined(CONFIG_ARCH_SHMOBILE)
>>> +#if defined(CONFIG_SUPERH) || defined(CONFIG_ARM)
>> I'm not sure about this one. In principle DMA so far is only used on SDHI
>> with TMIO. But this #if was for a theoretical case, when a TMIO MMC IP
>> inside an MFD is also used with DMA. Bus since I had no indormation about
>> whether the CTL_DMA_ENABLE register was SDHI specific or not, I put it
>> under an #if for the time being. In any case, I don't think making it
>> #ifdef CONFIG_ARM makes much sense. We can either remove the #if
>> completely, or keep it to limit the scope of this write to sh-mobile
>> arches.
> SUPERH || ARCH_SHMOBILE covers all the platforms this driver currently builds
> on. Now that we're adding ARCH_SHMOBILE_MULTI the #if needs to cover that case
> as well. I'm fine with limiting the CTL_DMA_ENABLE write to SUPERH only (which
> would modify the driver's behaviour)
I'm afraid that would break the driver's ability to work in DMA mode on
SH-Mobile SoCs.
> or enabling it unconditionally, but I
> don't think adding a defined(CONFIG_ARCH_SHMOBILE_MULTI) to the above #if
> makes sense, unless there's a plan to add support for DMA for non-SH
> (including both SUPERH and ARCH_SHMOBILE) platforms.
Not only the plan -- I have already posted the patches to do it for
R8A777x, and Simon has queued them for 3.13.
>>> /* Switch DMA mode on or off - SuperH specific? */
>>> sd_ctrl_write16(host, CTL_DMA_ENABLE, enable ? 2 : 0);
>>>
>>> #endif
WBR, Sergei
next prev parent reply other threads:[~2013-10-29 12:12 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1383004027-25036-1-git-send-email-laurent.pinchart+renesas@ideasonboard.com>
2013-10-28 23:46 ` [PATCH 01/19] serial: sh-sci: Enable the driver on all ARM platforms Laurent Pinchart
2013-10-28 23:46 ` [PATCH 02/19] DMA: shdma: " Laurent Pinchart
2013-10-28 23:46 ` [PATCH 03/19] i2c: sh_mobile: " Laurent Pinchart
2013-10-29 5:03 ` Wolfram Sang
2013-10-29 9:43 ` Laurent Pinchart
2013-10-28 23:46 ` [PATCH 04/19] input: sh_keysc: " Laurent Pinchart
2013-10-28 23:46 ` [PATCH 05/19] iommu: shmobile: " Laurent Pinchart
2013-10-28 23:46 ` [PATCH 06/19] i2c: rcar: " Laurent Pinchart
2013-10-29 5:03 ` Wolfram Sang
2013-10-28 23:46 ` [PATCH 07/19] v4l: sh_vou: " Laurent Pinchart
2013-10-30 12:26 ` Mauro Carvalho Chehab
2013-11-06 0:57 ` Laurent Pinchart
2013-10-28 23:46 ` [PATCH 08/19] mmc: sdhi: " Laurent Pinchart
2013-10-29 9:07 ` Guennadi Liakhovetski
2013-10-29 9:52 ` Laurent Pinchart
2013-10-29 12:12 ` Sergei Shtylyov [this message]
2013-10-29 13:15 ` Laurent Pinchart
2013-10-29 19:47 ` Sergei Shtylyov
2013-10-29 22:23 ` Laurent Pinchart
2013-10-28 23:46 ` [PATCH 09/19] mmc: sh_mmcif: " Laurent Pinchart
2013-10-28 23:46 ` [PATCH 10/19] mtd: sh_flctl: " Laurent Pinchart
2013-10-28 23:46 ` [PATCH 11/19] net: sh_eth: Set receive alignment correctly " Laurent Pinchart
2013-10-28 23:47 ` [PATCH 12/19] irda: sh_irda: Enable the driver " Laurent Pinchart
2013-10-28 23:47 ` [PATCH 13/19] pinctrl: sh-pfc: " Laurent Pinchart
2013-10-28 23:47 ` [PATCH 14/19] pwm: pwm-renesas-tpu: " Laurent Pinchart
2013-10-28 23:47 ` [PATCH 15/19] sh: intc: " Laurent Pinchart
2013-10-28 23:47 ` [PATCH 16/19] spi: sh_msiof: " Laurent Pinchart
2013-10-29 16:40 ` Mark Brown
2013-10-28 23:47 ` [PATCH 17/19] spi: sh_hspi: " Laurent Pinchart
2013-10-28 23:47 ` [PATCH 18/19] thermal: rcar-thermal: " Laurent Pinchart
2013-10-28 23:47 ` [PATCH 19/19] fbdev: sh-mobile-lcdcfb: " Laurent Pinchart
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=526FA641.9090300@cogentembedded.com \
--to=sergei.shtylyov@cogentembedded.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).