linux-kernel - Re: [PATCH] Add SPI over GPIO driver

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Date:	Tue, 15 Jul 2008 14:52:13 +0200
From:	Michael Buesch <mb@...sch.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	sfr@...b.auug.org.au, linux-kernel@...r.kernel.org,
	david-b@...bell.net, piotr.skamruk@...il.com,
	openwrt-devel@...ts.openwrt.org
Subject: Re: [PATCH] Add SPI over GPIO driver

On Monday 14 July 2008 22:43:45 Andrew Morton wrote:
> On Mon, 14 Jul 2008 21:09:12 +0200
> Michael Buesch <mb@...sch.de> wrote:
> 
> > +static inline void do_spidelay(struct spi_device *dev, unsigned nsecs)
> > +{
> > +	struct spi_gpio *sp = spidev_to_sg(dev);
> > +
> > +	if (!sp->info->no_spi_delay)
> > +		ndelay(nsecs);
> > +}
> > +
> > +#define spidelay(nsecs) do {					\
> > +	/* Steal the spi_device pointer from our caller.	\
> > +	 * The bitbang-API should probably get fixed here... */	\
> > +	do_spidelay(spi, nsecs);				\
> > +  } while (0)
> 
> A macro which requires that its caller have a particular local variable
> is a bit nasty.  Could we plan to add the spi_device* to spidelay()
> please? 


Yeah right. I was planning to fix this later on _after_ this was merged.
This makes the merge easier with less patch cross-dependencies.


-- 
Greetings Michael.
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