From 0d9030a2c3214cf8f9bfff84204e0f5ba5e790d7 Mon Sep 17 00:00:00 2001
From: Octavian Purdila <octavian.purdila@intel.com>
Date: Fri, 5 Jun 2015 16:59:43 +0300
Subject: [PATCH] rtc: fix drivers that consider 0 as a valid IRQ in
 client->irq

Since dab472eb931b ("i2c / ACPI: Use 0 to indicate that device does not
have interrupt assigned"), 0 is not a valid i2c client irq anymore, so
change all driver's checks accordingly.

The same issue occurs when the device is instantiated via device tree
with no IRQ, or from the i2c sysfs interface, even before the patch
above.

Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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