diff options
| author | Adrian Hunter <adrian.hunter@nokia.com> | 2010-12-09 11:48:27 +0300 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2010-12-21 23:05:25 +0300 |
| commit | a3551f5b0c3ca7aaa053e554e3ee766983b5d713 (patch) | |
| tree | 76fec6e7169219e26c67ff206713b2d09771e33b /arch/arm/mach-omap2/gpmc.c | |
| parent | 4584acc3ee236424b5d0b52f143d980cae3c2be5 (diff) | |
| download | linux-a3551f5b0c3ca7aaa053e554e3ee766983b5d713.tar.xz | |
OMAP2/3: GPMC: put sync_clk value in picoseconds instead of nanoseconds
The calculations done with sync_clk are anyway in picoseconds
and switching to picoseconds allows sync_clk values that are
not a whole number of nanoseconds - which is sometimes the
case.
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/mach-omap2/gpmc.c')
| -rw-r--r-- | arch/arm/mach-omap2/gpmc.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c index f46933bc9373..1b7b3e7d02f7 100644 --- a/arch/arm/mach-omap2/gpmc.c +++ b/arch/arm/mach-omap2/gpmc.c @@ -168,6 +168,16 @@ unsigned int gpmc_ns_to_ticks(unsigned int time_ns) return (time_ns * 1000 + tick_ps - 1) / tick_ps; } +unsigned int gpmc_ps_to_ticks(unsigned int time_ps) +{ + unsigned long tick_ps; + + /* Calculate in picosecs to yield more exact results */ + tick_ps = gpmc_get_fclk_period(); + + return (time_ps + tick_ps - 1) / tick_ps; +} + unsigned int gpmc_ticks_to_ns(unsigned int ticks) { return ticks * gpmc_get_fclk_period() / 1000; @@ -235,7 +245,7 @@ int gpmc_cs_calc_divider(int cs, unsigned int sync_clk) int div; u32 l; - l = sync_clk * 1000 + (gpmc_get_fclk_period() - 1); + l = sync_clk + (gpmc_get_fclk_period() - 1); div = l / gpmc_get_fclk_period(); if (div > 4) return -1; |