[U-Boot] [PATCH 1/5][v5] armv8: define usec2ticks function

[Aneesh Bansal]

usec2ticks() function has been defined for ARMv8 which will
be used by SEC Driver.

Signed-off-by: Aneesh Bansal <aneesh.bansal at freescale.com>
---
Changes in v5:
- Commit Subject modified

Changes in v4: None

Changes in v3: None

Changes in v2: None (New Patch set created with an additional patch)

 arch/arm/cpu/armv8/generic_timer.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm/cpu/armv8/generic_timer.c b/arch/arm/cpu/armv8/generic_timer.c
index 8e60bae..8f47a82 100644
--- a/arch/arm/cpu/armv8/generic_timer.c
+++ b/arch/arm/cpu/armv8/generic_timer.c
@@ -40,3 +40,14 @@ unsigned long timer_read_counter(void)
 #endif
 	return cntpct;
 }
+
+unsigned long usec2ticks(unsigned long usec)
+{
+	ulong ticks;
+	if (usec < 1000)
+		ticks = ((usec * (get_tbclk()/1000)) + 500) / 1000;
+	else
+		ticks = ((usec / 10) * (get_tbclk() / 100000));
+
+	return ticks;
+}
-- 
1.8.1.4