From 399cf0f63f6f24d7a837fbfbc801010cb6e77579 Mon Sep 17 00:00:00 2001
From: Keerthy <j-keerthy@ti.com>
Date: Tue, 18 Aug 2015 15:11:16 +0530
Subject: [PATCH] rtc: omap: Add external clock enabling support

Configure the clock source to external clock if available.
External clock is preferred as it can be ticking during suspend.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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