> > +       ibm-panel@62 {
> > +               compatible = "ibm,op-panel";
> > +               reg = <0x40000062>; /* I2C_OWN_SLAVE_ADDRESS */
> 
> Other users of SLAVE_ADDRESS have included <dt-bindings/i2c/i2c.h> and
> written the reg as follows:
> 
> reg = <(I2C_OWN_SLAVE_ADDRESS | 0x62)>
> 
> Which obviously has the same result. I'll leave it up to you.

The latter, please.