diff options
Diffstat (limited to 'drivers/rtc/rx8025.c')
| -rw-r--r-- | drivers/rtc/rx8025.c | 44 |
1 files changed, 23 insertions, 21 deletions
diff --git a/drivers/rtc/rx8025.c b/drivers/rtc/rx8025.c index 09bf365f63..9423a1bb82 100644 --- a/drivers/rtc/rx8025.c +++ b/drivers/rtc/rx8025.c @@ -39,6 +39,7 @@ enum rx_model { #define RTC_DATE_REG_ADDR 0x04 #define RTC_MON_REG_ADDR 0x05 #define RTC_YR_REG_ADDR 0x06 +#define RTC_OFFSET_REG_ADDR 0x07 #define RTC_CTL1_REG_ADDR 0x0e #define RTC_CTL2_REG_ADDR 0x0f @@ -152,6 +153,19 @@ static int rx8025_rtc_get(struct udevice *dev, struct rtc_time *tmp) */ static int rx8025_rtc_set(struct udevice *dev, const struct rtc_time *tmp) { + /* To work around the read/write cycle issue mentioned + * at the top of this file, write all the time registers + * in one I2C transaction + */ + u8 write_op[8]; + + /* 2412 flag must be set before doing a RTC write, + * otherwise the seconds and minute register + * will be cleared when the flag is set + */ + if (rtc_write(dev, RTC_CTL1_REG_ADDR, RTC_CTL1_BIT_2412)) + return -EIO; + DEBUGR("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, tmp->tm_hour, tmp->tm_min, tmp->tm_sec); @@ -159,28 +173,16 @@ static int rx8025_rtc_set(struct udevice *dev, const struct rtc_time *tmp) if (tmp->tm_year < 1970 || tmp->tm_year > 2069) printf("WARNING: year should be between 1970 and 2069!\n"); - if (rtc_write(dev, RTC_YR_REG_ADDR, bin2bcd(tmp->tm_year % 100))) - return -EIO; - - if (rtc_write(dev, RTC_MON_REG_ADDR, bin2bcd(tmp->tm_mon))) - return -EIO; - - if (rtc_write(dev, RTC_DAY_REG_ADDR, bin2bcd(tmp->tm_wday))) - return -EIO; - - if (rtc_write(dev, RTC_DATE_REG_ADDR, bin2bcd(tmp->tm_mday))) - return -EIO; - - if (rtc_write(dev, RTC_HR_REG_ADDR, bin2bcd(tmp->tm_hour))) - return -EIO; - - if (rtc_write(dev, RTC_MIN_REG_ADDR, bin2bcd(tmp->tm_min))) - return -EIO; - - if (rtc_write(dev, RTC_SEC_REG_ADDR, bin2bcd(tmp->tm_sec))) - return -EIO; + write_op[RTC_SEC_REG_ADDR] = bin2bcd(tmp->tm_sec); + write_op[RTC_MIN_REG_ADDR] = bin2bcd(tmp->tm_min); + write_op[RTC_HR_REG_ADDR] = bin2bcd(tmp->tm_hour); + write_op[RTC_DAY_REG_ADDR] = bin2bcd(tmp->tm_wday); + write_op[RTC_DATE_REG_ADDR] = bin2bcd(tmp->tm_mday); + write_op[RTC_MON_REG_ADDR] = bin2bcd(tmp->tm_mon); + write_op[RTC_YR_REG_ADDR] = bin2bcd(tmp->tm_year % 100); + write_op[RTC_OFFSET_REG_ADDR] = 0; - return rtc_write(dev, RTC_CTL1_REG_ADDR, RTC_CTL1_BIT_2412); + return dm_i2c_write(dev, 0, &write_op[0], 8); } /* |