Blackfin arch: add functions for converting between sclks and usecs
[linux-2.6.git] / arch / blackfin / kernel / setup.c
index 6b85145f848886c01cd365e17cb947f33c3320e9..0e746449c29b1f2e75cbe232d73cfc28566e46f4 100644 (file)
@@ -459,7 +459,7 @@ static u_long get_vco(void)
        return vco;
 }
 
-/*Get the Core clock*/
+/* Get the Core clock */
 u_long get_cclk(void)
 {
        u_long csel, ssel;
@@ -493,6 +493,18 @@ u_long get_sclk(void)
 }
 EXPORT_SYMBOL(get_sclk);
 
+unsigned long sclk_to_usecs(unsigned long sclk)
+{
+       return (USEC_PER_SEC * (u64)sclk) / get_sclk();
+}
+EXPORT_SYMBOL(sclk_to_usecs);
+
+unsigned long usecs_to_sclk(unsigned long usecs)
+{
+       return get_sclk() / (USEC_PER_SEC * (u64)usecs);
+}
+EXPORT_SYMBOL(usecs_to_sclk);
+
 /*
  *     Get CPU information for use by the procfs.
  */