linux-kernel - RE: [PATCH 3/4] [MMC] mmc_spi: add polling support for thecarddetectline

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Date:	Tue, 27 May 2008 10:11:45 +0800
From:	"Chen Gong" <G.Chen@...escale.com>
To:	<avorontsov@...mvista.com>
Cc:	"Kumar Gala" <galak@...nel.crashing.org>,
	"David Brownell" <dbrownell@...rs.sourceforge.net>,
	"Pierre Ossman" <drzeus-mmc@...eus.cx>, <linuxppc-dev@...abs.org>,
	<spi-devel-general@...ts.sourceforge.net>,
	<linux-kernel@...r.kernel.org>, "Tabi Timur" <timur@...escale.com>
Subject: RE: [PATCH 3/4] [MMC] mmc_spi: add polling support for thecarddetectline

 

> -----Original Message-----
> From: Anton Vorontsov [mailto:avorontsov@...mvista.com] 
> Sent: 2008?5?26? 23:38
> To: Chen Gong
> Cc: Kumar Gala; David Brownell; Pierre Ossman; 
> linuxppc-dev@...abs.org; 
> spi-devel-general@...ts.sourceforge.net; 
> linux-kernel@...r.kernel.org; Tabi Timur
> Subject: Re: [PATCH 3/4] [MMC] mmc_spi: add polling support 
> for thecarddetectline
> 
> On Thu, May 22, 2008 at 09:44:57PM +0800, Chen Gong wrote:
> [...]
> > > > I want to know whether every card working well ? Because
> > > I'm working
> > > > For 83xx MMC-over-SPI support, the presented concrete
> > > methods I used
> > > > as you do, but only 256M card seems good, 512M or 1G/2G
> > > card all have
> > > > some problems
> > > 
> > > So far I don't have cards larger than 256M. Will try to get one 
> > > though.
> > > 
> > Thanks, if you have any new test report pls contact me.
> 
> Just tested with Apacer 1GB MicroSD (connected through dumb 
> adapter), it works quite well here. I've successfully wrote 
> 10 mb file onto ext2 formatted partition...

Oh, thanks for your info. The card I used is Kingston 1G SD card.

> 
> > BTW, a fews days ago Joakim Tjernlund made a heavy fix for 
> > spi_mpc83xx.c to resolve clock glitch. But it looks no any 
> impact for 
> > me, but maybe it has positive effect for you.
> 
> Yup, I use it.
> 
> Btw, which mmc driver are you using? The one from MPC8610HPCD 
> BSP or mainline's mmc_spi?

:-( the mmc driver now in the MPC8610HPCD BSP is ported from uClinux
 by me, it has many problems, because at that time MMC-over-SPI driver
doen't exist in the kernel.

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