[U-Boot] [PATCH 1/2 V3] exynos: Export timer_get_us() to get microsecond timer

[Rajeshwari Shinde]

This function, if implemented by the board, provides a microsecond
timer. The granularity may be larger than 1us if hardware does not
support this.

Signed-off-by: Simon Glass <sjg at chromium.org>
Signed-off-by: Rajeshwari Shinde <rajeshwari.s at samsung.com>
---
Changes in V2:
	- Removed #ifdefine for exported function.
Changes in V3:
	- None
 include/common.h |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/include/common.h b/include/common.h
index 8a1f3e4..c228d44 100644
--- a/include/common.h
+++ b/include/common.h
@@ -590,6 +590,12 @@ void ddr_enable_ecc(unsigned int dram_size);
 #endif
 #endif
 
+/*
+ * Return the current value of a monotonically increasing microsecond timer.
+ * Granularity may be larger than 1us if hardware does not support this.
+ */
+ulong timer_get_us(void);
+
 /* $(CPU)/cpu.c */
 static inline int cpumask_next(int cpu, unsigned int mask)
 {
-- 
1.7.4.4