PCF8591_CONTROL_AOEF
return sprintf(buf, "%u\n", !(!(data->control & PCF8591_CONTROL_AOEF)));
data->control |= PCF8591_CONTROL_AOEF;
data->control &= ~PCF8591_CONTROL_AOEF;
#define PCF8591_INIT_CONTROL ((input_mode << 4) | PCF8591_CONTROL_AOEF)