linux-kernel - Re: [spi-devel-general] [PATCH] trivial: some fixes in spi documentation

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Date:	Mon, 2 Nov 2009 14:54:51 -0200
From:	Thadeu Lima de Souza Cascardo <cascardo@...oscopio.com>
To:	Wolfram Sang <w.sang@...gutronix.de>
Cc:	trivial@...nel.org,
	David Brownell <dbrownell@...rs.sourceforge.net>,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	Randy Dunlap <rdunlap@...otime.net>,
	spi-devel-general@...ts.sourceforge.net
Subject: Re: [spi-devel-general] [PATCH] trivial: some fixes in spi
	documentation

On Mon, Nov 02, 2009 at 01:13:34PM +0100, Wolfram Sang wrote:
> Hi,
> 
> the typo fixes look good, still...
> 
> On Fri, Oct 30, 2009 at 07:28:14PM -0200, Thadeu Lima de Souza Cascardo wrote:
> > Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@...oscopio.com>
> > ---
> >  Documentation/spi/spi-summary |    8 ++++----
> >  1 files changed, 4 insertions(+), 4 deletions(-)
> > 
> > diff --git a/Documentation/spi/spi-summary b/Documentation/spi/spi-summary
> > index deab51d..607aa97 100644
> > --- a/Documentation/spi/spi-summary
> > +++ b/Documentation/spi/spi-summary
> > @@ -121,7 +121,7 @@ active.  So the master must set the clock to inactive before selecting
> >  a slave, and the slave can tell the chosen polarity by sampling the
> >  clock level when its select line goes active.  That's why many devices
> >  support for example both modes 0 and 3:  they don't care about polarity,
> > -and alway clock data in/out on rising clock edges.
> > +and always clock data in/out on rising clock edges.
> >  
> >  
> >  How do these driver programming interfaces work?
> > @@ -236,7 +236,7 @@ And SOC-specific utility code might look something like:
> >  		struct mysoc_spi_data *pdata2;
> >  
> >  		pdata2 = kmalloc(sizeof *pdata2, GFP_KERNEL);
> > -		*pdata2 = pdata;
> > +		*pdata2 = *pdata;
> 
> ... this looks correct, because a few lines above it is stated:
> 
>         static struct mysoc_spi_data __initdata pdata = { ... };
> 
> No pointer here. But yeah, pretty confusing for an example.
> 

Oh. Right. I may have thought that was an array or something. I will
resend without it or think of a more clear example (perhaps, get some
real but simple code).

> >  		...
> >  		if (n == 2) {
> >  			spi2->dev.platform_data = pdata2;
> > @@ -427,8 +427,8 @@ any more such messages.
> >      it, should only be used with small amounts of data where the
> >      cost of an extra copy may be ignored.  It's designed to support
> >      common RPC-style requests, such as writing an eight bit command
> > -    and reading a sixteen bit response -- spi_w8r16() being one its
> > -    wrappers, doing exactly that.
> > +    and reading a sixteen bit response -- spi_w8r16() being one of
> > +    its wrappers, doing exactly that.
> >  
> >  Some drivers may need to modify spi_device characteristics like the
> >  transfer mode, wordsize, or clock rate.  This is done with spi_setup(),
> > -- 
> > 1.6.3.3
> > 
> > 
> > ------------------------------------------------------------------------------
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> 
> -- 
> Pengutronix e.K.                           | Wolfram Sang                |
> Industrial Linux Solutions                 | http://www.pengutronix.de/  |



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