rtc: tps65910: allow using RTC without alarm interrupt

If tps65910 INT1 pin (IRQ output) is not wired to any IRQ controller,
then it can't be used as system wakeup/alarm source,
but it is still possible to read/write time from/to RTC.

Signed-off-by: Andrey Skvortsov <andrej.skvortzov@gmail.com>
Link: https://lore.kernel.org/r/20191116203748.27166-1-andrej.skvortzov@gmail.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

diff --git a/drivers/rtc/rtc-tps65910.c b/drivers/rtc/rtc-tps65910.c
index 2c0467a9e71798a201291bd9097f1da80da894ea..e3840386f430c188286eb2f7ad7271da64dcee53 100644 (file)
--- a/drivers/rtc/rtc-tps65910.c
+++ b/drivers/rtc/rtc-tps65910.c
@@ -361,6 +361,13 @@ static const struct rtc_class_ops tps65910_rtc_ops = {
        .set_offset     = tps65910_set_offset,
 };
 
+static const struct rtc_class_ops tps65910_rtc_ops_noirq = {
+       .read_time      = tps65910_rtc_read_time,
+       .set_time       = tps65910_rtc_set_time,
+       .read_offset    = tps65910_read_offset,
+       .set_offset     = tps65910_set_offset,
+};
+
 static int tps65910_rtc_probe(struct platform_device *pdev)
 {
        struct tps65910 *tps65910 = NULL;
@@ -414,14 +421,16 @@ static int tps65910_rtc_probe(struct platform_device *pdev)
        ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
                tps65910_rtc_interrupt, IRQF_TRIGGER_LOW,
                dev_name(&pdev->dev), &pdev->dev);
-       if (ret < 0) {
-               dev_err(&pdev->dev, "IRQ is not free.\n");
-               return ret;
-       }
+       if (ret < 0)
+               irq = -1;
+
        tps_rtc->irq = irq;
-       device_set_wakeup_capable(&pdev->dev, 1);
+       if (irq != -1) {
+               device_set_wakeup_capable(&pdev->dev, 1);
+               tps_rtc->rtc->ops = &tps65910_rtc_ops;
+       } else
+               tps_rtc->rtc->ops = &tps65910_rtc_ops_noirq;
 
-       tps_rtc->rtc->ops = &tps65910_rtc_ops;
        tps_rtc->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
        tps_rtc->rtc->range_max = RTC_TIMESTAMP_END_2099;