--- /dev/null
+From 35425bafc772ee189e3c3790d7c672b80ba65909 Mon Sep 17 00:00:00 2001
+From: Biwen Li <biwen.li@nxp.com>
+Date: Tue, 15 Sep 2020 15:32:09 +0800
+Subject: rtc: pcf2127: fix a bug when not specify interrupts property
+
+From: Biwen Li <biwen.li@nxp.com>
+
+commit 35425bafc772ee189e3c3790d7c672b80ba65909 upstream.
+
+Fix a bug when not specify interrupts property in dts
+as follows,
+ rtc-pcf2127-i2c 1-0051: failed to request alarm irq
+ rtc-pcf2127-i2c: probe of 1-0051 failed with error -22
+
+Signed-off-by: Biwen Li <biwen.li@nxp.com>
+Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
+Link: https://lore.kernel.org/r/20200915073213.12779-1-biwen.li@oss.nxp.com
+Cc: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ drivers/rtc/rtc-pcf2127.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+--- a/drivers/rtc/rtc-pcf2127.c
++++ b/drivers/rtc/rtc-pcf2127.c
+@@ -559,7 +559,7 @@ static int pcf2127_probe(struct device *
+ pcf2127->rtc->set_start_time = true; /* Sets actual start to 1970 */
+ pcf2127->rtc->uie_unsupported = 1;
+
+- if (alarm_irq >= 0) {
++ if (alarm_irq > 0) {
+ ret = devm_request_threaded_irq(dev, alarm_irq, NULL,
+ pcf2127_rtc_irq,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+@@ -570,7 +570,7 @@ static int pcf2127_probe(struct device *
+ }
+ }
+
+- if (alarm_irq >= 0 || device_property_read_bool(dev, "wakeup-source")) {
++ if (alarm_irq > 0 || device_property_read_bool(dev, "wakeup-source")) {
+ device_init_wakeup(dev, true);
+ pcf2127->rtc->ops = &pcf2127_rtc_alrm_ops;
+ }