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Check the clock-halted flag every time the clock is read, not just once

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at startup.  The flag stays set until the clock is loaded with good time,
so we need to keep saying the time is invalid until that happens.
This commit is contained in:
Ian Lepore 2017-07-31 15:24:40 +00:00
parent e9c9826673
commit bf9c1267f3
1 changed files with 4 additions and 0 deletions
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4
sys/dev/iicbus/ds1307.c
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@ -328,6 +328,10 @@ ds1307_gettime(device_t dev, struct timespec *ts)
return (error);
}
/* If the clock halted, we don't have good data. */
if (data[DS1307_SECS] & DS1307_SECS_CH)
return (EINVAL);
/* If chip is in AM/PM mode remember that. */
if (data[DS1307_HOUR] & DS1307_HOUR_USE_AMPM) {
sc->sc_use_ampm = true;