diff options
| author | Mike Frysinger <michael.frysinger@analog.com> | 2007-10-21 22:59:49 +0800 |
|---|---|---|
| committer | Bryan Wu <bryan.wu@analog.com> | 2007-10-21 22:59:49 +0800 |
| commit | 2f6cf7bfc64c44d760d53caf4b547e7729392e78 (patch) | |
| tree | ecbd135d50cfc35f505f386cfbc9206b0e8cdfba | |
| parent | b0a68dc07ec395d44849ce98eb417713ca333410 (diff) | |
Blackfin arch: add functions for converting between sclks and usecs
Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| -rw-r--r-- | arch/blackfin/kernel/setup.c | 14 | ||||
| -rw-r--r-- | include/asm-blackfin/bfin-global.h | 2 |
2 files changed, 15 insertions, 1 deletions
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. */ diff --git a/include/asm-blackfin/bfin-global.h b/include/asm-blackfin/bfin-global.h index a006353a4310..14cb8d35924e 100644 --- a/include/asm-blackfin/bfin-global.h +++ b/include/asm-blackfin/bfin-global.h @@ -47,6 +47,8 @@ extern unsigned long get_cclk(void); extern unsigned long get_sclk(void); +extern unsigned long sclk_to_usecs(unsigned long sclk); +extern unsigned long usecs_to_sclk(unsigned long usecs); extern void dump_thread(struct pt_regs *regs, struct user *dump); extern void dump_bfin_regs(struct pt_regs *fp, void *retaddr); |