linux-kernel - Re: [PATCH] i2c: adds support for i2c bus on Freescale CPM1/CPM2 controllers

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Date:	Wed, 21 May 2008 17:09:25 +0200
From:	Jean Delvare <khali@...ux-fr.org>
To:	Wolfram Sang <w.sang@...gutronix.de>
Cc:	Jochen Friedrich <jochen@...am.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux I2C <i2c@...sensors.org>,
	Scott Wood <scottwood@...escale.com>,
	Kumar Gala <galak@...nel.crashing.org>,
	linuxppc-dev list <linuxppc-dev@...abs.org>,
	"Kernel, Linux" <linux-kernel@...r.kernel.org>,
	Boris Shteinbock <bshtein@...oo.com>
Subject: Re: [PATCH] i2c: adds support for i2c bus on Freescale CPM1/CPM2 
 controllers

On Wed, 21 May 2008 16:33:07 +0200, Wolfram Sang wrote:
> Hi Jochen,
> 
> On Wed, May 21, 2008 at 12:43:22PM +0200, Jochen Friedrich wrote:
> > This driver uses the port of 2.4 code from Vitaly Bordug
> > <vitb@...nel.crashing.org> and the actual algorithm used by the i2c
> > driver of the DBox code on cvs.tuxboc.org from Felix Domke
> > (tmbinc@....net) and Gillem (htoa@....net) converted to an
> > of_platform_driver. Tested on CPM1 (MPC823 on dbox2 hardware) and
> > CPM2 (MPC8272).
> > 
> > Signed-off-by: Jochen Friedrich <jochen@...am.de>
> > ---
> Works on MPC8260.
> 
> Tested-by: Wolfram Sang <w.sang@...gutronix.de>
> 
> >  drivers/i2c/busses/Kconfig   |   10 +
> >  drivers/i2c/busses/Makefile  |    1 +
> >  drivers/i2c/busses/i2c-cpm.c |  745 ++++++++++++++++++++++++++++++++++++++++++
> >  3 files changed, 756 insertions(+), 0 deletions(-)
> >  create mode 100644 drivers/i2c/busses/i2c-cpm.c
> > 
> > Changes since last version:
> > - fixed copy and paste bug (I2COM_MASTER -> I2COM_START)
> > - changed dev_err() to dev_dbg() for NACK
> > - changed dev_dbg() to dev_err() for Timeout
> > - added explanation for brg formular
> Typo: formula
> 
> > - added "bus-frequency" OF attribute to be able to override i2c clock
> \o/ Cool feature. Worked nicely.
> 
> > - support for numbered adapter (it was already documented in
> >   my booting-without-of patch but not yet implemented)
> > - finally changed i2c "pseudo address" 0xfe to 0x7f << 1
> > - get rid of the "fsl,cpm-i2c" name. This logic was screwed
> > - fixed the error patch for request_irq failure
>
> path instead of patch? But well, I assume typos in this section do not
> matter much anyhow as they are not imported into git. Am I right, Jean?

Yes you are.

-- 
Jean Delvare
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