static int tps80031_battery_charge_counter(struct tps80031_device_info *di,
union power_supply_propval *val)
{
int retval, ret;
uint32_t cnt_byte;
uint32_t acc_byte;
/* check if calibrated */
if (di->fg_calib_intr == 0)
return 0;
/* get current accumlator */
ret = tps80031_reads(di->dev->parent, TPS80031_SLAVE_ID2, FG_REG_04, 4,
(uint8_t *) &acc_byte);
if (ret < 0)
return ret;
/* counter value is mAs, need report uAh */
retval = (int32_t) acc_byte / 18 * 5;
/* get counter */
ret = tps80031_reads(di->dev->parent, TPS80031_SLAVE_ID2, FG_REG_01, 3,
(uint8_t *) &cnt_byte);
if (ret < 0)
return ret;
/* we need calibrate the offset current in uAh*/
retval = retval - (di->fg_offset / 4 * cnt_byte);
/* @todo, counter value will overflow if battery get continuously
* charged discharged for more than 108Ah using 250mS integration
* period althrough it is hightly impossible.
*/
return retval;
}
static int tps80031_read_regs(struct device *dev, int reg, int len,
uint8_t *val)
{
int ret;
/* dummy read of STATUS_REG as per data sheet */
ret = tps80031_reads(dev->parent, 1, RTC_STATUS, 1, val);
if (ret < 0) {
dev_err(dev->parent, "failed reading RTC_STATUS\n");
WARN_ON(1);
return ret;
}
ret = tps80031_reads(dev->parent, 1, reg, len, val);
if (ret < 0) {
dev_err(dev->parent, "failed reading from reg %d\n", reg);
WARN_ON(1);
return ret;
}
return 0;
}
static int tps80031_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
u8 buff[TPS80031_RTC_TIME_NUM_REGS];
int ret;
ret = tps80031_reads(dev->parent, TPS80031_SLAVE_ID1,
TPS80031_SECONDS_REG, TPS80031_RTC_TIME_NUM_REGS, buff);
if (ret < 0) {
dev_err(dev, "reading RTC_SECONDS_REG failed, err = %d\n", ret);
return ret;
}
tm->tm_sec = bcd2bin(buff[0]);
tm->tm_min = bcd2bin(buff[1]);
tm->tm_hour = bcd2bin(buff[2]);
tm->tm_mday = bcd2bin(buff[3]);
tm->tm_mon = bcd2bin(buff[4]) - 1;
tm->tm_year = bcd2bin(buff[5]) + RTC_YEAR_OFFSET;
tm->tm_wday = bcd2bin(buff[6]);
return 0;
}
static int tps80031_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
u8 buff[6];
int ret;
ret = tps80031_reads(dev->parent, TPS80031_SLAVE_ID1,
TPS80031_ALARM_SECONDS_REG,
TPS80031_RTC_ALARM_NUM_REGS, buff);
if (ret < 0) {
dev_err(dev->parent,
"reading RTC_ALARM failed, err = %d\n", ret);
return ret;
}
alrm->time.tm_sec = bcd2bin(buff[0]);
alrm->time.tm_min = bcd2bin(buff[1]);
alrm->time.tm_hour = bcd2bin(buff[2]);
alrm->time.tm_mday = bcd2bin(buff[3]);
alrm->time.tm_mon = bcd2bin(buff[4]) - 1;
alrm->time.tm_year = bcd2bin(buff[5]) + RTC_YEAR_OFFSET;
return 0;
}
