TQM5200 I2C Second bus

[Grant Likely]

On Tue, Sep 23, 2008 at 05:39:05PM +0300, Jani.Sarkijarvi at elektrobit.com wrote:
>  
> It is very possible that, setting are not right. I found from mpc5200 manual this register: (MBAR + 0x0B00, GPS, GPIO Standard registers). Where should be right place to modify those register?

Ideally, your U-Boot port should set the correct value for port config.
If you are unable to modify U-Boot, then you can clone
arch/powerpc/platform/52xx/mpc5200_simple.c for the tqm5200 board and
put the port_config fixup in there.

arch/powerpc/platform/52xx/lite5200.c exists for the exact same reason.
Look at the lite5200_fix_port_config() function.

g.

> 
> BR,
> 
> Jani Särkijärvi
> 
> -----Original Message-----
> From: Juergen Beisert [mailto:jbe at pengutronix.de] 
> Sent: 19 September 2008 16:58
> To: linuxppc-embedded at ozlabs.org
> Cc: Särkijärvi, Jani
> Subject: Re: TQM5200 I2C Second bus
> 
> On Freitag, 19. September 2008, Jani.Sarkijarvi at elektrobit.com wrote:
> > Hi,
> >
> > I'm using TQM5200 (MPC5200) chip with linux-2.6-denx. Problem is to 
> > get second I2c bus to work (/dev/i2c-0) . /dev/i2c-1 seems to be 
> > internal bus and I can read ex. lm75 temperature sensor, also I can 
> > see traffic in oscilloscope (only error is "I2C: No RXAK", but it 
> > seems to be working). My .dts setup is:
> 
> Is your "GPS Port Configuration Register" setting correct?
> 
> jbe
> 
> --
> Dipl.-Ing. Juergen Beisert | http://www.pengutronix.de
>  Pengutronix - Linux Solutions for Science and Industry
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