Usage of i2c_-Tools in Barebox

[Sascha Hauer]

On Thu, May 07, 2015 at 01:24:19PM +0200, Marcel Behlau wrote:
> Hi,
> 
> many thanks for your help. I activated the i2c devices in the device
> tree, the pinctrl is already done in the imx6q.dtsi, which is
> included. The used pins are identically with the used pins on the
> SBC. devinfo told me, that the driver "i2c-fsl" is loaded. After
> rebuild barebox, it's possible to probe the bus, but the command
> only answered with an timeout:
> 
> barebox at Phytec phyFLEX-i.MX6 Quad Carrier-Board:/ i2c_probe 1 83 83
> probing i2c range 0x53 - 0x53 :
> i2c2: <i2c_fsl_bus_busy> timeout waiting for I2C bus busy

I *think* this means that the levels on the bus do not properly follow
what the controller wants to do. Maybe pullup missing? An oscilloscope
might help here.

Sascha

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