static int ds1305_set_time(struct device *dev, struct rtc_time *time)
{
struct ds1305 *ds1305 = dev_get_drvdata(dev);
u8 buf[1 + DS1305_RTC_LEN];
u8 *bp = buf;
dev_vdbg(dev, "%s secs=%d, mins=%d, "
"hours=%d, mday=%d, mon=%d, year=%d, wday=%d\n",
"write", time->tm_sec, time->tm_min,
time->tm_hour, time->tm_mday,
time->tm_mon, time->tm_year, time->tm_wday);
/* Write registers starting at the first time/date address. */
*bp++ = DS1305_WRITE | DS1305_SEC;
*bp++ = bin2bcd(time->tm_sec);
*bp++ = bin2bcd(time->tm_min);
*bp++ = hour2bcd(ds1305->hr12, time->tm_hour);
*bp++ = (time->tm_wday < 7) ? (time->tm_wday + 1) : 1;
*bp++ = bin2bcd(time->tm_mday);
*bp++ = bin2bcd(time->tm_mon + 1);
*bp++ = bin2bcd(time->tm_year - 100);
dev_dbg(dev, "%s: %02x %02x %02x, %02x %02x %02x %02x\n",
"write", buf[1], buf[2], buf[3],
buf[4], buf[5], buf[6], buf[7]);
/* use write-then-read since dma from stack is nonportable */
return spi_write_then_read(ds1305->spi, buf, sizeof buf,
NULL, 0);
}
/*
* Context: caller holds rtc->ops_lock (to protect ds1305->ctrl)
*/
static int ds1305_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
{
struct ds1305 *ds1305 = dev_get_drvdata(dev);
struct spi_device *spi = ds1305->spi;
unsigned long now, later;
struct rtc_time tm;
int status;
u8 buf[1 + DS1305_ALM_LEN];
/* convert desired alarm to time_t */
status = rtc_tm_to_time(&alm->time, &later);
if (status < 0)
return status;
/* Read current time as time_t */
status = ds1305_get_time(dev, &tm);
if (status < 0)
return status;
status = rtc_tm_to_time(&tm, &now);
if (status < 0)
return status;
/* make sure alarm fires within the next 24 hours */
if (later <= now)
return -EINVAL;
if ((later - now) > 24 * 60 * 60)
return -EDOM;
/* disable alarm if needed */
if (ds1305->ctrl[0] & DS1305_AEI0) {
ds1305->ctrl[0] &= ~DS1305_AEI0;
buf[0] = DS1305_WRITE | DS1305_CONTROL;
buf[1] = ds1305->ctrl[0];
status = spi_write_then_read(ds1305->spi, buf, 2, NULL, 0);
if (status < 0)
return status;
}
/* write alarm */
buf[0] = DS1305_WRITE | DS1305_ALM0(DS1305_SEC);
buf[1 + DS1305_SEC] = bin2bcd(alm->time.tm_sec);
buf[1 + DS1305_MIN] = bin2bcd(alm->time.tm_min);
buf[1 + DS1305_HOUR] = hour2bcd(ds1305->hr12, alm->time.tm_hour);
buf[1 + DS1305_WDAY] = DS1305_ALM_DISABLE;
dev_dbg(dev, "%s: %02x %02x %02x %02x\n",
"alm0 write", buf[1 + DS1305_SEC], buf[1 + DS1305_MIN],
buf[1 + DS1305_HOUR], buf[1 + DS1305_WDAY]);
status = spi_write_then_read(spi, buf, sizeof buf, NULL, 0);
if (status < 0)
return status;
/* enable alarm if requested */
if (alm->enabled) {
ds1305->ctrl[0] |= DS1305_AEI0;
buf[0] = DS1305_WRITE | DS1305_CONTROL;
buf[1] = ds1305->ctrl[0];
status = spi_write_then_read(ds1305->spi, buf, 2, NULL, 0);
}
return status;
}
