diff options
| -rw-r--r-- | arch/blackfin/kernel/time-ts.c | 26 |
1 files changed, 4 insertions, 22 deletions
diff --git a/arch/blackfin/kernel/time-ts.c b/arch/blackfin/kernel/time-ts.c index 2855f0f..eef5283 100644 --- a/arch/blackfin/kernel/time-ts.c +++ b/arch/blackfin/kernel/time-ts.c @@ -46,20 +46,8 @@ #define CYC2NS_SCALE_FACTOR 10 /* 2^10, carefully chosen */ -static inline unsigned long cyc2ns_scale(unsigned long cpu_khz) -{ - return (1000000 << CYC2NS_SCALE_FACTOR) / cpu_khz; -} - -static inline unsigned long long cycles_2_ns(cycle_t cyc, unsigned long cyc2ns_scale) -{ - return (cyc * cyc2ns_scale) >> CYC2NS_SCALE_FACTOR; -} - #if defined(CONFIG_CYCLES_CLOCKSOURCE) -static unsigned long cycles_cyc2ns_scale; - static notrace cycle_t bfin_read_cycles(struct clocksource *cs) { return __bfin_cycles_off + (get_cycles() << __bfin_cycles_mod); @@ -70,19 +58,17 @@ static struct clocksource bfin_cs_cycles = { .rating = 400, .read = bfin_read_cycles, .mask = CLOCKSOURCE_MASK(64), - .shift = 22, + .shift = CYC2NS_SCALE_FACTOR, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; static inline unsigned long long bfin_cs_cycles_sched_clock(void) { - return cycles_2_ns(bfin_read_cycles(&bfin_cs_cycles), cycles_cyc2ns_scale); + return cyc2ns(&bfin_cs_cycles, bfin_read_cycles(&bfin_cs_cycles)); } static int __init bfin_cs_cycles_init(void) { - cycles_cyc2ns_scale = cyc2ns_scale(get_cclk() / 1000); - bfin_cs_cycles.mult = \ clocksource_hz2mult(get_cclk(), bfin_cs_cycles.shift); @@ -97,8 +83,6 @@ static int __init bfin_cs_cycles_init(void) #ifdef CONFIG_GPTMR0_CLOCKSOURCE -unsigned long gptimer0_cyc2ns_scale; - void __init setup_gptimer0(void) { disable_gptimers(TIMER0bit); @@ -121,19 +105,17 @@ static struct clocksource bfin_cs_gptimer0 = { .rating = 350, .read = bfin_read_gptimer0, .mask = CLOCKSOURCE_MASK(32), - .shift = 22, + .shift = CYC2NS_SCALE_FACTOR, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; static inline unsigned long long bfin_cs_gptimer0_sched_clock(void) { - return cycles_2_ns(bfin_read_TIMER0_COUNTER(), gptimer0_cyc2ns_scale); + return cyc2ns(&bfin_cs_gptimer0, bfin_read_TIMER0_COUNTER()); } static int __init bfin_cs_gptimer0_init(void) { - gptimer0_cyc2ns_scale = cyc2ns_scale(get_sclk() / 1000); - setup_gptimer0(); bfin_cs_gptimer0.mult = \ |
