stsec_read
int stsec_read(struct stsec_softc *, uint, int *);
rc = stsec_read(sc, ST7_VERSION, &rev);
rc = stsec_read(sc, ST7_SIGNATURE, &sig);
if (stsec_read(sc, ST7_STATUS, &status) != 0 ||
stsec_read(sc, ST7_CONTROL, &control) != 0 ||
stsec_read(sc, ST7_BATTERY_L, &batl) != 0 ||
stsec_read(sc, ST7_BATTERY_H, &bath) != 0)