On Thu, Sep 13, 2012 at 12:53:09PM +0200, Wolfram Sang wrote: > On Mon, Sep 03, 2012 at 11:23:22PM +0300, Aaro Koskinen wrote: > > Add i2c driver to enable access to devices behind CBUS on Nokia Internet > > Tablets. > > > > The patch also adds CBUS I2C configuration for N8x0 which is one of the > > users of this driver. > > > > Cc: linux-...@vger.kernel.org > > Acked-by: Felipe Balbi <ba...@ti.com> > > Acked-by: Tony Lindgren <t...@atomide.com> > > Signed-off-by: Aaro Koskinen <aaro.koski...@iki.fi> > > My main question is: what is CBUS? It doesn't look like an I2C/SMBUS > host controller, but some bit-banging protocol? As such, it shouldn't go > to i2c/busses/. And the protocol doesn't look much like I2C, neither. > There is no ACK/NACK/START/STOP, so I wonder if it should be in i2c > after all...
It's some legacy 3-wire bus protocol. Not much info is available, there's some references to CBUS in i2c spec, so I thought it wouldn't be a completly wrong place for it... A. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
