DS1286_CONTROL
ctl = ds1286_read(sc, DS1286_CONTROL); \
ds1286_write(sc, DS1286_CONTROL, ctl | DS1286_TE); \
ds1286_write(sc, DS1286_CONTROL, ctl); \
ctl = ds1286_read(sc, DS1286_CONTROL); \
ds1286_write(sc, DS1286_CONTROL, ctl | DS1286_TE); \
ds1286_write(sc, DS1286_CONTROL, ctl); \