From: Nishanth Menon <nm@ti.com>
Date: Tue, 19 Apr 2016 16:23:54 +0000 (-0500)
Subject: rtc: ds1307: Use irq when available for wakeup-source device
X-Git-Tag: v4.6-rc5~17^2
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=38a7a73e8ed0fa9e8cd99bb62463afbdcd23429b;p=linux.git

rtc: ds1307: Use irq when available for wakeup-source device

With commit 8bc2a40730ec ("rtc: ds1307: add support for the
DT property 'wakeup-source'") we lost the ability for rtc irq
functionality for devices that are actually hooked on a real IRQ
line and have capability to wakeup as well. This is not an expected
behavior. So, instead of just not requesting IRQ, skip the IRQ
requirement only if interrupts are not defined for the device.

Fixes: 8bc2a40730ec ("rtc: ds1307: add support for the DT property 'wakeup-source'")
Reported-by: Tony Lindgren <tony@atomide.com>
Cc: Michael Lange <linuxstuff@milaw.biz>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---

diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index ee3cae2f212e..ecb7dbae9be9 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -1531,7 +1531,7 @@ static int ds1307_probe(struct i2c_client *client,
 		return PTR_ERR(ds1307->rtc);
 	}
 
-	if (ds1307_can_wakeup_device) {
+	if (ds1307_can_wakeup_device && ds1307->client->irq <= 0) {
 		/* Disable request for an IRQ */
 		want_irq = false;
 		dev_info(&client->dev, "'wakeup-source' is set, request for an IRQ is disabled!\n");