PCF8584_CMD_STOP
pcfiic_write(sc, PCF8584_S1, PCF8584_CMD_STOP);
pcfiic_write(sc, PCF8584_S1, PCF8584_CMD_STOP);
pcfiic_write(sc, PCF8584_S1, PCF8584_CMD_STOP);
pcfiic_write(sc, PCF8584_S1, PCF8584_CMD_STOP);
pcfiic_write(sc, PCF8584_S1, PCF8584_CMD_STOP);
pcfiic_write(sc, PCF8584_S1, PCF8584_CMD_STOP);