Re: [PATCH v2 1/2] dmaengine: add Qualcomm BAM dma driver

[Andy Gross <agross@codeaurora.org>]

On Tue, Jan 21, 2014 at 09:03:43AM +0100, Arnd Bergmann wrote:
> On Monday 20 January 2014 16:52:45 Andy Gross wrote:
> 
> > > > +#ifdef CONFIG_OF
> > > > +static const struct of_device_id bam_of_match[] = {
> > > > +	{ .compatible = "qcom,bam-v1.4.0", },
> > > > +	{ .compatible = "qcom,bam-v1.4.1", },
> > > > +	{}
> > > > +};
> > > > +MODULE_DEVICE_TABLE(of, bam_of_match);
> > > > +#endif
> > > 
> > > Also, you can remove the #ifdef here and the of_match_ptr() below.
> > > 
> > 
> > If this is removed, then I'll have to add the OF dependency in the Kconfig,
> > correct?
> 
> I believe it will still compile without the CONFIG_OF dependency, but
> having the dependency still makes sense as it's impossible to use the
> driver without CONFIG_OF.
> 
> The best dependency line is probably
> 
> 	depends on (ARCH_MSM && OF) || COMPILE_TEST"
> 
> If you expect the same driver to be used on non-MSM platforms from
> qualcomm, e.g. some networking or server equipment, you can also just
> drop the ARCH_MSM dependency.


Thanks for the clarification.  I think I'll probably do:
ARCH_MSM_DT || (COMPILE_TEST && ARM)

The latter due to my use of writel_relaxed.


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