Merge branch 'master' of git://git.denx.de/u-boot-atmel

[u-boot] / arch / arm / imx-common / timer.c

diff --git a/arch/arm/imx-common/timer.c b/arch/arm/imx-common/timer.c
index 65ef60bf2edb0a115d7bc48b1eb35dffa0b41901..e522990453915878695b0ee6b792c55adf3cf097 100644 (file)
--- a/arch/arm/imx-common/timer.c
+++ b/arch/arm/imx-common/timer.c
@@ -176,3 +176,20 @@ ulong get_tbclk(void)
 {
        return gpt_get_clk();
 }
+
+/*
+ * This function is intended for SHORT delays only.
+ * It will overflow at around 10 seconds @ 400MHz,
+ * or 20 seconds @ 200MHz.
+ */
+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;
+}