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The year is stored in a single byte in sram, in binary format, as a count

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of years since the century, so strip the century out when converting to or
from bcd_clocktime format (the conversion routines will infer century by
pivoting on 70).
This commit is contained in:
Ian Lepore 2018-03-04 21:58:32 +00:00
parent a8e747c5e7
commit 89ba361fcc
1 changed files with 2 additions and 2 deletions
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4
sys/dev/iicbus/rtc8583.c
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@ -237,7 +237,7 @@ rtc8583_gettime(device_t dev, struct timespec *ts)
bct.hour = tregs.hour & 0x3f;
bct.day = tregs.day & 0x3f;
bct.mon = tregs.month & 0x1f;
bct.year = (bin2bcd(sreg / 100) << 8) | bin2bcd(sreg % 100);
bct.year = bin2bcd(sreg % 100);
clock_dbgprint_bcd(sc->dev, CLOCK_DBG_READ, &bct);
return (clock_bcd_to_ts(&bct, ts, false));
@ -269,7 +269,7 @@ rtc8583_settime(device_t dev, struct timespec *ts)
return (err);
err = rtc8583_writeto(sc->dev, RTC8583_SC_REG, &tregs,
sizeof(tregs), IIC_WAIT);
sreg = bcd2bin(bct.year & 0xff) + 100 * bcd2bin(bct.year >> 8);
sreg = bcd2bin(bct.year & 0xff);
/* save to year to sram */
rtc8583_write1(sc, RTC8583_USERSRAM_REG, sreg);
iicbus_release_bus(sc->busdev, sc->dev);