From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wolfgang Grandegger <wg@grandegger.com>
Subject: Re: [PATCH] powerpc: i2c-mpc: make speed registers configurable via
	FDT
Date: Thu, 31 Jul 2008 22:28:55 +0200
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To: Timur Tabi <timur@freescale.com>
Cc: Scott Wood <scottwood@freescale.com>, Linux I2C <i2c@lm-sensors.org>, Linuxppc-dev@ozlabs.org
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Timur Tabi wrote:
> Wolfgang Grandegger wrote:
> 
>> I'm a bit confused. The frequency of the I2C source clock and the real 
>> I2C clock frequency are two different things. 
> 
> There are two frequencies:
> 
> 1) The frequency of the input clock to the I2C device, after it has gone through
> a divider.  This is what I call the "I2C clock frequency" and what I think
> belongs in the clock-frequency property.  This is usually the platform clock
> divided by 1, 2, or 3.

OK.

> 2) The speed of the I2C bus, as seen by devices on that bus.  This is usually
> 400KHz.

Which should be defined with the property "current-speed", right?

Wolfgang.