axp809_read
if ((error = axp809_read(sc, c->c_voltage_reg, &val)) != 0)
error = axp809_read(sc, c->c_voltage_reg, &val);
error = axp809_read(sc, c->c_enable_reg, &val);
if ((error = axp809_read(sc, c->c_enable_reg, &val)) != 0)
if ((error = axp809_read(sc, c->c_enable_reg, &val)) != 0)
static int axp809_read(struct axp809_softc *, uint8_t, uint8_t *);