d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Catch up with improvements in RTC handling... It's no longer necessary to

Browse Source 
ignore the timestamp passed in to settime() due to inaccuracy, the core
routines now pass in a nanosecond-accurate time freshly-obtained before
calling each driver's settime() method.  Also, add calls to the new
debugging output helpers.
This commit is contained in:
ian 2018-07-08 18:44:42 +00:00
parent da485b59a5
commit 1e1fb9a665
1 changed files with 10 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
sys/arm/freescale/imx/imx6_snvs.c
View File

@ -137,36 +137,34 @@ snvs_gettime(device_t dev, struct timespec *ts)
*ts = sbttots(counter1);
clock_dbgprint_ts(sc->dev, CLOCK_DBG_READ, ts);
return (0);
}
static int
snvs_settime(device_t dev, struct timespec *unused)
snvs_settime(device_t dev, struct timespec *ts)
{
struct snvs_softc *sc;
struct bintime bt;
sbintime_t sbt;
sc = device_get_softc(dev);
/*
* Ignore the inaccurate time passed in from the common clock code and
* obtain a time worthy of our 30us accuracy.
*/
bintime(&bt);
bt.sec -= utc_offset();
sbt = bttosbt(bt);
/*
* It takes two clock cycles for the counter to start after setting the
* enable bit, so add two SBT_LSBs to what we're about to set.
* The hardware format is the same as sbt (with fewer fractional bits),
* so first convert the time to sbt. It takes two clock cycles for the
* counter to start after setting the enable bit, so add two SBT_LSBs to
* what we're about to set.
*/
sbt = tstosbt(*ts);
sbt += 2 << SBT_LSB;
snvs_rtc_enable(sc, false);
WR4(sc, SNVS_LPSRTCMR, (uint32_t)(sbt >> (SBT_LSB + 32)));
WR4(sc, SNVS_LPSRTCLR, (uint32_t)(sbt >> (SBT_LSB)));
snvs_rtc_enable(sc, true);
clock_dbgprint_ts(sc->dev, CLOCK_DBG_WRITE, ts);
return (0);
}