Messages in this thread | | | Date | Wed, 21 May 2008 18:17:06 +0200 | From | Jochen Friedrich <> | Subject | Re: [PATCH] [POWERPC] Add i2c pins to dts and board setup |
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Hi Scott,
>> + - linux,i2c-index : Can be used to hard code an i2c bus number. >> + - linux,i2c-class : Can be used to override the i2c class. > > Why do we need this?
There are still a bunch of i2c drivers using the old API (mainly v4l and dvb stuff) which are slowly being converted by their subsystem maintainers, though.
> It'd be better to just convert any needed old-style drivers than add this > to the device tree.
Sure. That's why the parameters are only optional. Once all i2c drivers are converted, these parameters won't be used anymore. Maybe they should be marked as deprecated.
>> + - bus-frequency : Can be used to set the i2c bus frequency. If unspecified, >> + a default frequency of 60kHz is being used. > > clock-frequency is the standard name for such things.
I was just confused by the fact that unlike a serial port, i2c is a bus itself.
Thanks, Jochen
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