Re: [PATCH v4 02/11] dt-bindings: i2c: Discard i2c-slave flag from the DW I2C example

Andy Shevchenko
2020-05-27T17:56:25Z

On Wed, May 27, 2020 at 08:18:41PM +0300, Serge Semin wrote:
> On Wed, May 27, 2020 at 11:12:04AM -0600, Rob Herring wrote:
> > On Wed, May 27, 2020 at 03:01:02PM +0300, Serge Semin wrote:
> > > dtc currently doesn't support I2C_OWN_SLAVE_ADDRESS flag set in the
> > > i2c "reg" property. If it is the compiler will print a warning:
> > >
> > > Warning (i2c_bus_reg): /example-2/i2c@1120000/eeprom@64: I2C bus unit address format error, expected "40000064"
> > > Warning (i2c_bus_reg): /example-2/i2c@1120000/eeprom@64:reg: I2C address must be less than 10-bits, got "0x40000064"
> > >
> > > In order to silence dtc up let's discard the flag from the DW I2C DT
> > > binding example for now. Just revert this commit when dtc is fixed.

> > > eeprom@64 {
> > > compatible = "linux,slave-24c02";
> > > - reg = <0x40000064>;
> > > + reg = <0x64>;
> >
> > But the compatible is a slave, so you need an example with a different
> > device.
>

> Ok. I'll replace the sub-node with just "atmel,24c02" compatible string then.

But how it will be different to the another slave connected to the master?

This example is specifically to show that DesingWare I²C controller may be
switched to slave mode.

> > > };
> > > };
> > > - |

--
With Best Regards,
Andy Shevchenko