MIIC_CONVCTRL_CONV_SPEED
val |= FIELD_PREP(MIIC_CONVCTRL_CONV_SPEED, speed);
mask |= MIIC_CONVCTRL_CONV_SPEED;
val |= FIELD_PREP(MIIC_CONVCTRL_CONV_SPEED, conv_speed);
(MIIC_CONVCTRL_CONV_SPEED | MIIC_CONVCTRL_FULLD), val);
FIELD_PREP(MIIC_CONVCTRL_CONV_SPEED, CONV_MODE_100MBPS);
mask = MIIC_CONVCTRL_CONV_MODE | MIIC_CONVCTRL_CONV_SPEED;