From: Viresh Kumar <viresh.kumar@linaro.org> To: Arnd Bergmann <arnd@arndb.de>, Vinod Koul <vinod.koul@intel.com> Cc: linux-arm-kernel@lists.infradead.org, devicetree-discuss@lists.ozlabs.org, spear-devel@list.st.com, linux-kernel@vger.kernel.org, andriy.shevchenko@linux.intel.com Subject: Re: [PATCH V3 2/3] dmaengine: dw_dmac: Enhance device tree support Date: Wed, 12 Dec 2012 08:30:35 +0530 [thread overview] Message-ID: <CAKohpo=FjZuMOC-wuNc3q_FXbk546ttCLr55GkW9AL0Tz-HoBA@mail.gmail.com> (raw) In-Reply-To: <201212102208.52347.arnd@arndb.de> Sorry for replying late, was too busy with other work yesterday. On 11 December 2012 03:38, Arnd Bergmann <arnd@arndb.de> wrote: > I'm deeply sorry for the very late complaint on this, but I only now Better late than never :) > noticed this patch as I was seeing build breakage in linux-next > because of it. Oops!! Here is a fix for that Author: Viresh Kumar <viresh.kumar@linaro.org> Date: Wed Dec 12 08:28:07 2012 +0530 ARM: SPEAr1310: Fix CF DMA data We need to pass string with device-channel name to dma controller instead of dma controller specific dma struct. Fix CF dma data. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> --- arch/arm/mach-spear13xx/spear1310.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/mach-spear13xx/spear1310.c b/arch/arm/mach-spear13xx/spear1310.c index f65ad5b..54f0e2e 100644 --- a/arch/arm/mach-spear13xx/spear1310.c +++ b/arch/arm/mach-spear13xx/spear1310.c @@ -36,7 +36,7 @@ static struct arasan_cf_pdata cf_pdata = { .cf_if_clk = CF_IF_CLK_166M, .quirk = CF_BROKEN_UDMA, - .dma_priv = &cf_dma_priv, + .dma_priv = "cf", }; > Viresh, there are multiple problems with your approach unfortunately: > > * It does not follow the binding from > Documentation/devicetree/bindings/dma/dma.txt When i patched it, this patch wasn't there in linux-next/master. Probably was getting reviewed somewhere :) > * It requires slave drivers to know that they are using the dw_dmac > driver and pass a pointer to dw_generic_filter, which is not > generic at all > > * It requires the dmac node to have information about all slaves > > There are also some minor issues, such as the naming of DT > properties, but the above need to be resolved first. I saw the binding document and it looks it can be applied to dw_dmac too, as there is nothing special for it. The question is how? We are already late for merge window and this one is queued. Supplying a new patch, getting it reviewed/tested and being pulled by Linus is not so easy :) Two ways: - Keep it as is, and i will fix it separately and quickly - Drop it :( -- viresh
WARNING: multiple messages have this Message-ID (diff)
From: viresh.kumar@linaro.org (Viresh Kumar) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH V3 2/3] dmaengine: dw_dmac: Enhance device tree support Date: Wed, 12 Dec 2012 08:30:35 +0530 [thread overview] Message-ID: <CAKohpo=FjZuMOC-wuNc3q_FXbk546ttCLr55GkW9AL0Tz-HoBA@mail.gmail.com> (raw) In-Reply-To: <201212102208.52347.arnd@arndb.de> Sorry for replying late, was too busy with other work yesterday. On 11 December 2012 03:38, Arnd Bergmann <arnd@arndb.de> wrote: > I'm deeply sorry for the very late complaint on this, but I only now Better late than never :) > noticed this patch as I was seeing build breakage in linux-next > because of it. Oops!! Here is a fix for that Author: Viresh Kumar <viresh.kumar@linaro.org> Date: Wed Dec 12 08:28:07 2012 +0530 ARM: SPEAr1310: Fix CF DMA data We need to pass string with device-channel name to dma controller instead of dma controller specific dma struct. Fix CF dma data. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> --- arch/arm/mach-spear13xx/spear1310.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/mach-spear13xx/spear1310.c b/arch/arm/mach-spear13xx/spear1310.c index f65ad5b..54f0e2e 100644 --- a/arch/arm/mach-spear13xx/spear1310.c +++ b/arch/arm/mach-spear13xx/spear1310.c @@ -36,7 +36,7 @@ static struct arasan_cf_pdata cf_pdata = { .cf_if_clk = CF_IF_CLK_166M, .quirk = CF_BROKEN_UDMA, - .dma_priv = &cf_dma_priv, + .dma_priv = "cf", }; > Viresh, there are multiple problems with your approach unfortunately: > > * It does not follow the binding from > Documentation/devicetree/bindings/dma/dma.txt When i patched it, this patch wasn't there in linux-next/master. Probably was getting reviewed somewhere :) > * It requires slave drivers to know that they are using the dw_dmac > driver and pass a pointer to dw_generic_filter, which is not > generic at all > > * It requires the dmac node to have information about all slaves > > There are also some minor issues, such as the naming of DT > properties, but the above need to be resolved first. I saw the binding document and it looks it can be applied to dw_dmac too, as there is nothing special for it. The question is how? We are already late for merge window and this one is queued. Supplying a new patch, getting it reviewed/tested and being pulled by Linus is not so easy :) Two ways: - Keep it as is, and i will fix it separately and quickly - Drop it :( -- viresh
next prev parent reply other threads:[~2012-12-12 3:00 UTC|newest] Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-10-16 4:19 [PATCH V3 1/3] dmaengine: dw_dmac: Update documentation style comments for dw_dma_platform_data Viresh Kumar 2012-10-16 4:19 ` Viresh Kumar 2012-10-16 4:19 ` [PATCH V3 2/3] dmaengine: dw_dmac: Enhance device tree support Viresh Kumar 2012-10-16 4:19 ` Viresh Kumar 2012-10-26 8:55 ` Viresh Kumar 2012-10-26 8:55 ` Viresh Kumar 2012-10-26 8:48 ` Vinod Koul 2012-10-26 8:48 ` Vinod Koul 2012-10-26 9:05 ` Viresh Kumar 2012-10-26 9:05 ` Viresh Kumar 2012-10-26 9:10 ` Vinod Koul 2012-10-26 9:10 ` Vinod Koul 2012-12-10 22:08 ` Arnd Bergmann 2012-12-10 22:08 ` Arnd Bergmann 2012-12-10 22:21 ` Arnd Bergmann 2012-12-10 22:21 ` Arnd Bergmann 2012-12-12 3:00 ` Viresh Kumar [this message] 2012-12-12 3:00 ` Viresh Kumar 2012-12-12 8:40 ` Andy Shevchenko 2012-12-12 8:40 ` Andy Shevchenko 2012-12-12 8:43 ` Viresh Kumar 2012-12-12 8:43 ` Viresh Kumar 2012-12-12 8:43 ` Viresh Kumar 2013-01-08 23:09 ` Arnd Bergmann 2013-01-08 23:09 ` Arnd Bergmann 2012-12-12 8:42 ` Andy Shevchenko 2012-12-12 8:42 ` Andy Shevchenko 2012-10-16 4:19 ` [PATCH V3 3/3] ARM: SPEAr13xx: Pass DW DMAC platform data from DT Viresh Kumar 2012-10-16 4:19 ` Viresh Kumar
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='CAKohpo=FjZuMOC-wuNc3q_FXbk546ttCLr55GkW9AL0Tz-HoBA@mail.gmail.com' \ --to=viresh.kumar@linaro.org \ --cc=andriy.shevchenko@linux.intel.com \ --cc=arnd@arndb.de \ --cc=devicetree-discuss@lists.ozlabs.org \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-kernel@vger.kernel.org \ --cc=spear-devel@list.st.com \ --cc=vinod.koul@intel.com \ /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: linkBe 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.