plat_shared_i2c_enter
extern void plat_shared_i2c_enter(dev_info_t *);
if ((&plat_shared_i2c_enter != NULL) && (dip != NULL)) {
plat_shared_i2c_enter(i2c->pcf8584_dip);
if ((&plat_shared_i2c_enter != NULL) && (dip != NULL)) {
plat_shared_i2c_enter(smbus->smbus_dip);