diff options
| -rw-r--r-- | drivers/rtc/rtc-tps6594.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-tps6594.c b/drivers/rtc/rtc-tps6594.c index 06af177b2d78..e69667634137 100644 --- a/drivers/rtc/rtc-tps6594.c +++ b/drivers/rtc/rtc-tps6594.c @@ -44,6 +44,7 @@ struct tps6594_rtc { struct rtc_device *rtc_dev; + int irq; }; static int tps6594_rtc_alarm_irq_enable(struct device *dev, @@ -419,6 +420,8 @@ static int tps6594_rtc_probe(struct platform_device *pdev) if (irq < 0) return dev_err_probe(dev, irq, "Failed to get irq\n"); + rtc->irq = irq; + ret = devm_request_threaded_irq(dev, irq, NULL, tps6594_rtc_interrupt, IRQF_ONESHOT, TPS6594_IRQ_NAME_ALARM, dev); @@ -438,6 +441,49 @@ static int tps6594_rtc_probe(struct platform_device *pdev) return devm_rtc_register_device(rtc->rtc_dev); } +static int tps6594_rtc_resume(struct device *dev) +{ + struct tps6594 *tps = dev_get_drvdata(dev->parent); + struct tps6594_rtc *rtc = dev_get_drvdata(dev); + int ret; + + ret = regmap_test_bits(tps->regmap, TPS6594_REG_INT_STARTUP, + TPS6594_BIT_RTC_INT); + if (ret < 0) { + dev_err(dev, "failed to read REG_INT_STARTUP: %d\n", ret); + goto out; + } + + if (ret > 0) { + /* + * If the alarm bit is set, it means that the IRQ has been + * fired. But, the kernel may not have woke up yet when it + * happened. So, we have to clear it. + */ + ret = regmap_write(tps->regmap, TPS6594_REG_RTC_STATUS, + TPS6594_BIT_ALARM); + if (ret < 0) + dev_err(dev, "error clearing alarm bit: %d", ret); + + rtc_update_irq(rtc->rtc_dev, 1, RTC_IRQF | RTC_AF); + } +out: + disable_irq_wake(rtc->irq); + + return 0; +} + +static int tps6594_rtc_suspend(struct device *dev) +{ + struct tps6594_rtc *rtc = dev_get_drvdata(dev); + + enable_irq_wake(rtc->irq); + + return 0; +} + +static DEFINE_SIMPLE_DEV_PM_OPS(tps6594_rtc_pm_ops, tps6594_rtc_suspend, tps6594_rtc_resume); + static const struct platform_device_id tps6594_rtc_id_table[] = { { "tps6594-rtc", }, {} @@ -448,6 +494,7 @@ static struct platform_driver tps6594_rtc_driver = { .probe = tps6594_rtc_probe, .driver = { .name = "tps6594-rtc", + .pm = pm_sleep_ptr(&tps6594_rtc_pm_ops), }, .id_table = tps6594_rtc_id_table, }; |