From: Vinod Koul <vinod.koul@linux.intel.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: viresh kumar <viresh.kumar@linaro.org>,
Andy Shevchenko <andy.shevchenko@gmail.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
linux-kernel@vger.kernel.org,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
spear-devel <spear-devel@list.st.com>
Subject: Re: [PATCHv2 2/4] dmaengine: dw_dmac: Add PCI part of the driver
Date: Thu, 27 Sep 2012 19:52:36 +0530 [thread overview]
Message-ID: <1348755756.1648.33.camel@vkoul-udesk3> (raw)
In-Reply-To: <201209270741.54443.arnd@arndb.de>
On Thu, 2012-09-27 at 07:41 +0000, Arnd Bergmann wrote:
> On Thursday 27 September 2012, viresh kumar wrote:
> > I believe there is no common initialization part here, because PCI device in any
> > case would be calling probe of platform device. :)
>
> Looking at the driver more closely now. Right now, it only supports platform
> devices, and the dw_probe function contains some parts that are related to
> platform devices and some parts that are needed also in case of PCI.
>
> My suggestion would be that you split the dw_probe function to separate out
> the bus specific parts and end up with three functions like
>
> int dw_dmac_probe(struct dw_dma *dw);
> int dw_dmac_platform_probe(struct platform_device *pdev);
> int dw_dmac_pci_probe(struct dw_dma *dw);
yes and bus probe shoudl aquire resources, other stuff should be done in
dmac_probe.
>
> where the first one is called by the other two, depending on the bus type.
> This could be done either splitting the driver into multiple files so you can
> have the platform and pci parts in separate driver modules depending on the
> common module that does all the actual work, or everything can be put in
> a single file with an #ifdef CONFIG_PCI to disable the pci driver parts
> when they don't apply.
probe wont be called if PCI device is not loaded, so see no reason why
CONFIG_xxx would be needed
>
> Does this make sense?
Yup!
>
> Arnd
> --
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--
~Vinod
next prev parent reply other threads:[~2012-09-27 14:28 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-25 12:13 [PATCHv1 0/6] dw_dmac: split the driver and introduce PCI part Andy Shevchenko
2012-09-25 12:13 ` [PATCHv1 1/6] dmaengine: dw_dmac: Remove clk API dependency Andy Shevchenko
2012-09-26 3:42 ` viresh kumar
2012-09-26 12:33 ` Andy Shevchenko
2012-09-25 12:13 ` [PATCHv1 2/6] dmaengine: dw_dmac: add driver for Atmel AT32 Andy Shevchenko
2012-09-26 3:50 ` viresh kumar
2012-09-26 6:47 ` Andy Shevchenko
2012-09-26 6:51 ` viresh kumar
2012-09-26 6:56 ` Andy Shevchenko
2012-09-26 3:52 ` viresh kumar
2012-09-25 12:13 ` [PATCHv1 3/6] dmaengine: dw_dmac: Add PCI part of the driver Andy Shevchenko
2012-09-26 4:00 ` viresh kumar
2012-09-26 7:48 ` Andy Shevchenko
2012-09-25 12:13 ` [PATCHv1 4/6] avr32: at32ap700x: rename DMA controller Andy Shevchenko
2012-09-25 12:13 ` [PATCHv1 5/6] MAINTAINERS: fix indentation for Viresh Kumar Andy Shevchenko
2012-09-26 3:36 ` viresh kumar
2012-09-26 7:10 ` Andy Shevchenko
2012-09-25 12:13 ` [PATCHv1 6/6] MAINTAINERS: add recently created files to dw_dmac section Andy Shevchenko
2012-09-25 13:19 ` Joe Perches
2012-09-25 13:37 ` Andy Shevchenko
2012-09-25 15:33 ` Vinod Koul
2012-09-25 16:57 ` Joe Perches
2012-09-26 6:44 ` Andy Shevchenko
2012-09-26 3:39 ` viresh kumar
2012-09-26 12:40 ` [PATCHv2 0/4] dw_dmac: split the driver and introduce PCI part Andy Shevchenko
2012-09-26 12:40 ` [PATCHv2 1/4] dmaengine: dw_dmac: convert to platform driver Andy Shevchenko
2012-09-26 14:13 ` viresh kumar
2012-09-26 18:00 ` Andy Shevchenko
2012-09-27 3:47 ` viresh kumar
2012-09-26 12:40 ` [PATCHv2 2/4] dmaengine: dw_dmac: Add PCI part of the driver Andy Shevchenko
2012-09-26 14:33 ` viresh kumar
2012-09-26 17:55 ` Andy Shevchenko
2012-09-26 19:41 ` Arnd Bergmann
2012-09-27 3:53 ` viresh kumar
2012-09-27 7:41 ` Arnd Bergmann
2012-09-27 14:22 ` Vinod Koul [this message]
2012-09-27 14:42 ` Arnd Bergmann
2012-09-26 12:40 ` [PATCHv2 3/4] dma: move dw_dmac driver to an own directory Andy Shevchenko
2012-09-26 14:53 ` viresh kumar
2012-09-26 17:50 ` Andy Shevchenko
2012-09-26 12:40 ` [PATCHv2 4/4] MAINTAINERS: add recently created files to dw_dmac section Andy Shevchenko
2012-09-26 14:45 ` viresh kumar
2012-09-26 14:48 ` viresh kumar
2012-09-26 17:49 ` Andy Shevchenko
2012-09-27 6:38 ` Andy Shevchenko
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