static int tps6591x_rtc_alarm_irq_enable(struct device *dev,
unsigned int enable)
{
struct tps6591x_rtc *rtc = dev_get_drvdata(dev);
u8 reg;
int err;
if (rtc->irq == -1)
return -EIO;
if (enable) {
if (rtc->irq_en == true)
return 0;
err = tps6591x_read_regs(dev, RTC_INT, 1, ®);
if (err)
return err;
reg |= 0x8;
err = tps6591x_write_regs(dev, RTC_INT, 1, ®);
if (err)
return err;
rtc->irq_en = true;
} else {
if (rtc->irq_en == false)
return 0;
err = tps6591x_read_regs(dev, RTC_INT, 1, ®);
if (err)
return err;
reg &= ~0x8;
err = tps6591x_write_regs(dev, RTC_INT, 1, ®);
if (err)
return err;
rtc->irq_en = false;
}
return 0;
}
static int tps6591x_rtc_start(struct device *dev)
{
u8 reg = 0;
u8 retries = 0;
int err;
do {
err = tps6591x_read_regs(dev, RTC_CTRL, 1, ®);
if (err < 0) {
dev_err(dev->parent, "\n failed to read RTC_CTRL reg\n");
return err;
}
/* set STOP bit alone */
reg |= 0x1;
err = tps6591x_write_regs(dev, RTC_CTRL, 1, ®);
if (err < 0) {
dev_err(dev->parent, "\n failed to program RTC_CTRL reg\n");
return err;
}
err = tps6591x_read_regs(dev, RTC_STATUS, 1, ®);
if (err < 0) {
dev_err(dev->parent, "\n failed to read RTC_CTRL reg\n");
return err;
}
/* FixMe: Is allowing up to 5 retries sufficient?? */
if (retries++ == 5) {
dev_err(dev->parent, "\n failed to stop RTC\n");
return -EBUSY;
}
} while (!(reg & 2));
return 0;
}
static int tps6591x_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
u8 buff[7];
int err;
err = tps6591x_read_regs(dev, RTC_SECONDS_REG, sizeof(buff), buff);
if (err < 0) {
dev_err(dev, "\n %s :: failed to read time\n", __FILE__);
return err;
}
convert_bcd_to_decimal(buff, sizeof(buff));
tm->tm_sec = buff[0];
tm->tm_min = buff[1];
tm->tm_hour = buff[2];
tm->tm_mday = buff[3];
tm->tm_mon = buff[4] - 1;
tm->tm_year = buff[5] + RTC_YEAR_OFFSET;
tm->tm_wday = buff[6];
print_time(dev, tm);
return tps6591x_rtc_valid_tm(tm);
}
static int tps6591x_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
u8 buff[6];
int err;
err = tps6591x_read_regs(dev, RTC_ALARM, sizeof(buff), buff);
if (err)
return err;
convert_bcd_to_decimal(buff, sizeof(buff));
alrm->time.tm_sec = buff[0];
alrm->time.tm_min = buff[1];
alrm->time.tm_hour = buff[2];
alrm->time.tm_mday = buff[3];
alrm->time.tm_mon = buff[4] - 1;
alrm->time.tm_year = buff[5] + RTC_YEAR_OFFSET;
dev_info(dev->parent, "\n getting alarm time::\n");
print_time(dev, &alrm->time);
return 0;
}
static irqreturn_t tps6591x_rtc_irq(int irq, void *data)
{
struct device *dev = data;
struct tps6591x_rtc *rtc = dev_get_drvdata(dev);
u8 reg;
int err;
/* clear Alarm status bits.*/
err = tps6591x_read_regs(dev, RTC_STATUS, 1, ®);
if (err) {
dev_err(dev->parent, "unable to read RTC_STATUS reg\n");
return -EBUSY;
}
reg = ALARM_INT_STATUS;
err = tps6591x_write_regs(dev, RTC_STATUS, 1, ®);
if (err) {
dev_err(dev->parent, "unable to program RTC_STATUS reg\n");
return -EBUSY;
}
rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_AF);
return IRQ_HANDLED;
}
static int tps6591x_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
u8 buff[7];
int err;
err = tps6591x_read_regs(dev, RTC_SECONDS_REG, sizeof(buff), buff);
if (err < 0) {
dev_err(dev, "\n %s :: failed to read time\n", __FILE__);
return err;
}
convert_bcd_to_decimal(buff, sizeof(buff));
tm->tm_sec = buff[0];
tm->tm_min = buff[1];
tm->tm_hour = buff[2];
tm->tm_mday = buff[3];
tm->tm_mon = buff[4];
tm->tm_year = buff[5];
tm->tm_wday = buff[6];
if(tm->tm_mon >= 1)
tm->tm_mon -=1;
else
printk("[Error]tps6591x_rtc_read_time tm->tm_mon=%x! This value should be above 0. \n", tm->tm_mon );
print_time(dev, tm);
return tps6591x_rtc_valid_tm(tm);
}
static int __devinit tps6591x_rtc_probe(struct platform_device *pdev)
{
struct tps6591x_rtc_platform_data *pdata = pdev->dev.platform_data;
struct tps6591x_rtc *rtc;
struct rtc_time tm;
int err;
u8 reg;
rtc = kzalloc(sizeof(*rtc), GFP_KERNEL);
if (!rtc)
return -ENOMEM;
rtc->shutdown_ongoing = false;
rtc->irq = -1;
if (!pdata) {
dev_err(&pdev->dev, "no platform_data specified\n");
return -EINVAL;
}
if (pdata->irq < 0)
dev_err(&pdev->dev, "\n no IRQ specified, wakeup is disabled\n");
dev_set_drvdata(&pdev->dev, rtc);
device_init_wakeup(&pdev->dev, 1);
rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
&tps6591x_rtc_ops, THIS_MODULE);
if (IS_ERR(rtc->rtc)) {
err = PTR_ERR(rtc->rtc);
goto fail;
}
if ((int)pdev && (int)&pdev->dev)
err = tps6591x_read_regs(&pdev->dev, RTC_STATUS, 1, ®);
else {
dev_err(&pdev->dev, "\n %s Input params incorrect\n", __func__);
return -EBUSY;
}
if (err) {
dev_err(&pdev->dev, "\n %s unable to read status\n", __func__);
return -EBUSY;
}
reg = RTC_BBCH_SEL | RTC_BBCH_EN;
tps6591x_write_regs(&pdev->dev, RTC_BBCH_REG, 1, ®);
if (err) {
dev_err(&pdev->dev, "unable to program Charger reg\n");
return -EBUSY;
}
err = tps6591x_rtc_start(&pdev->dev);
if (err) {
dev_err(&pdev->dev, "unable to start RTC\n");
return -EBUSY;
}
tps6591x_rtc_read_time(&pdev->dev, &tm);
if (tps6591x_rtc_valid_tm(&tm) < 0) {
if (pdata->time.tm_year < 2000 || pdata->time.tm_year >= 2100) {
memset(&pdata->time, 0, sizeof(pdata->time));
pdata->time.tm_year = 2000;
pdata->time.tm_mday = 1;
}
pdata->time.tm_year -= OS_REF_YEAR;
tps6591x_rtc_set_time(&pdev->dev, &pdata->time);
}
reg = ALARM_INT_STATUS;
err = tps6591x_write_regs(&pdev->dev, RTC_STATUS, 1, ®);
if (err) {
dev_err(&pdev->dev, "unable to program RTC_STATUS reg\n");
return -EBUSY;
}
reg = ENABLE_ALARM_INT;
tps6591x_write_regs(&pdev->dev, RTC_INT, 1, ®);
if (err) {
dev_err(&pdev->dev, "unable to program Interrupt Mask reg\n");
return -EBUSY;
}
if (pdata && (pdata->irq >= 0)) {
rtc->irq = pdata->irq;
err = request_threaded_irq(pdata->irq, NULL, tps6591x_rtc_irq,
IRQF_ONESHOT, "rtc_tps6591x",
&pdev->dev);
if (err) {
dev_err(&pdev->dev, "request IRQ:%d fail\n", rtc->irq);
rtc->irq = -1;
} else {
device_init_wakeup(&pdev->dev, 1);
enable_irq_wake(rtc->irq);
}
}
return 0;
fail:
if (!IS_ERR_OR_NULL(rtc->rtc))
rtc_device_unregister(rtc->rtc);
kfree(rtc);
return err;
}
