Re: [PATCH v2 2/5] dma: mxs-dma: make platform_device_id more generic

[Shawn Guo <shawn.guo-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>]

On Fri, May 04, 2012 at 02:15:03PM +0200, Marek Vasut wrote:
> >  static int __init mxs_add_mxs_dma(void)
> >  {
> > -	char *apbh = "mxs-dma-apbh";
> > -	char *apbx = "mxs-dma-apbx";
> > +	char *mx23_apbh = "imx23-dma-apbh";
> > +	char *mx23_apbx = "imx23-dma-apbx";
> > +	char *mx28_apbh = "imx28-dma-apbh";
> > +	char *mx28_apbx = "imx28-dma-apbx";
> 
> Wild guess ... but const char * won't hurt here ?
> 
Right.  I guess it just followed how the existing code looks like.
Considering this whole function will be removed patch #4, it should
not be a big problem, I guess.

> > -#define MXS_DMA_APBH		0
> > -#define MXS_DMA_APBX		1
> > -#define dma_is_apbh()		(mxs_dma->dev_id == MXS_DMA_APBH)
> > -
> > -#define APBH_VERSION_LATEST	3
> > -#define apbh_is_old()		(mxs_dma->version < APBH_VERSION_LATEST)
> > +#define dma_is_apbh()		(mxs_dma->type == MXS_DMA_APBH)
> > +#define apbh_is_old()		(mxs_dma->dev_id == IMX23_DMA)
> > 
...
> > +int mxs_dma_is_apbh(struct dma_chan *chan)
> > +{
> > +	struct mxs_dma_chan *mxs_chan = to_mxs_dma_chan(chan);
> > +	struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma;
> 
> Do you need the above here ? :)
> 
I have to confess it's my bad.  I made the code hard to read when I
created the driver.  The dma_is_apbh() should really takes mxs_dma
as a parameter than hiding it in the macro.

While I agree this is something should be improved, it may be better
to do it in another patch?

> > +
> > +	return dma_is_apbh();
> > +}

-- 
Regards,
Shawn