IICMUX_SELECT_IDLE
if (busidx == IICMUX_SELECT_IDLE) {
IICMUX_BUS_SELECT(dev, IICMUX_SELECT_IDLE, rd);
if (busidx == IICMUX_SELECT_IDLE) {
if (busidx == IICMUX_SELECT_IDLE) {
if (busidx == IICMUX_SELECT_IDLE) {