> On Mar 11, 2019, at 07:42, Jean-Francois Dagenais <jeff.dagenais@xxxxxxxxx> wrote: > > When issuing the write DAC register and write eeprom command, the two > powerdown bits (PD0 and PD1) are assumed by the chip to be present in > the bytes sent. Leaving them at 0 implies "powerdown disabled" which is > a different state that the current one. By adding the current state of > the powerdown in the i2c write, the chip will correctly power-on exactly > like as it is at the moment of store_eeprom call. > > This is documented in MCP4725's datasheet, FIGURE 6-2: "Write Commands > for DAC Input Register and EEPROM" and MCP4726's datasheet, FIGURE 6-3: > "Write All Memory Command". > > Signed-off-by: Jean-Francois Dagenais <jeff.dagenais@xxxxxxxxx> > --- I forgot to add: Acked-by: Peter Meerwald-Stadler <pmeerw@xxxxxxxxxx> in v2 v3 just for that?
