From 2f6cf7bfc64c44d760d53caf4b547e7729392e78 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Sun, 21 Oct 2007 22:59:49 +0800 Subject: Blackfin arch: add functions for converting between sclks and usecs Signed-off-by: Mike Frysinger Signed-off-by: Bryan Wu --- arch/blackfin/kernel/setup.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) (limited to 'arch') diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c index 6b85145f8488..0e746449c29b 100644 --- a/arch/blackfin/kernel/setup.c +++ b/arch/blackfin/kernel/setup.c @@ -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. */ -- cgit v1.2.3-59-g8ed1b