Hi Wolfram > > On SH-Mobile case, it automatically power-off:ed if all driver > > user was gone. > > It does that without calling some callback? Do you mean you can call init() in callback ? I don't care detail of design. But my concern was that register value might be disappear during many get/put if power-domain was implemented -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html