[PATCH] rtc: ds1307: set uie_unsupported if no interrupt is available

[Łukasz Stelmach]

For an RTC without an IRQ assigned rtc_update_irq_enable() should
return -EINVAL.  It will, when uie_unsupported is set.

Signed-off-by: Łukasz Stelmach <l.stelm...@samsung.com>
---
 drivers/rtc/rtc-ds1307.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index cd8e438bc9c4..b08a9736fa77 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -1973,13 +1973,6 @@ static int ds1307_probe(struct i2c_client *client,
        if (IS_ERR(ds1307->rtc))
                return PTR_ERR(ds1307->rtc);
 
-       if (ds1307_can_wakeup_device && !want_irq) {
-               dev_info(ds1307->dev,
-                        "'wakeup-source' is set, request for an IRQ is 
disabled!\n");
-               /* We cannot support UIE mode if we do not have an IRQ line */
-               ds1307->rtc->uie_unsupported = 1;
-       }
-
        if (want_irq) {
                err = devm_request_threaded_irq(ds1307->dev, client->irq, NULL,
                                                chip->irq_handler ?: ds1307_irq,
@@ -1993,6 +1986,13 @@ static int ds1307_probe(struct i2c_client *client,
                } else {
                        dev_dbg(ds1307->dev, "got IRQ %d\n", client->irq);
                }
+       } else {
+               if (ds1307_can_wakeup_device)
+                       dev_info(ds1307->dev,
+                                "'wakeup-source' is set, request for an IRQ is 
disabled!\n");
+
+               /* We cannot support UIE mode if we do not have an IRQ line */
+               ds1307->rtc->uie_unsupported = 1;
        }
 
        ds1307->rtc->ops = chip->rtc_ops ?: &ds13xx_rtc_ops;
-- 
2.26.2