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| author | Daniel Hellstrom <daniel@gaisler.com> | 2014-05-08 19:16:14 +0200 |
|---|---|---|
| committer | Daniel Hellstrom <daniel@gaisler.com> | 2014-05-08 21:05:29 +0200 |
| commit | 1c1c7506de1051df6d81c51a06a57be6406b534c (patch) | |
| tree | 059cce9a62e98f2f8479327b58d8a5ef5b513e22 /arch/sparc/cpu/leon3 | |
| parent | 09865465821fd35eabedcd9f102f1d576c626ad8 (diff) | |
| download | u-boot-imx-1c1c7506de1051df6d81c51a06a57be6406b534c.zip u-boot-imx-1c1c7506de1051df6d81c51a06a57be6406b534c.tar.gz u-boot-imx-1c1c7506de1051df6d81c51a06a57be6406b534c.tar.bz2 | |
leon: use CONFIG_SYS_HZ to config timer prescaler
Before it was hardcoded to 1000 ticks per second.
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
Diffstat (limited to 'arch/sparc/cpu/leon3')
| -rw-r--r-- | arch/sparc/cpu/leon3/cpu_init.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/arch/sparc/cpu/leon3/cpu_init.c b/arch/sparc/cpu/leon3/cpu_init.c index 4720f42..57ffa96 100644 --- a/arch/sparc/cpu/leon3/cpu_init.c +++ b/arch/sparc/cpu/leon3/cpu_init.c @@ -14,6 +14,9 @@ #include <config.h> +#define TIMER_BASE_CLK 1000000 +#define US_PER_TICK (1000000 / CONFIG_SYS_HZ) + DECLARE_GLOBAL_DATA_PTR; /* reset CPU (jump to 0, without reset) */ @@ -203,15 +206,15 @@ void cpu_wait_ticks(unsigned long ticks) while (get_timer(start) < ticks) ; } -/* initiate and setup timer0 interrupt to 1MHz +/* initiate and setup timer0 interrupt to configured HZ. Base clock is 1MHz. * Return irq number for timer int or a negative number for * dealing with self */ int timer_interrupt_init_cpu(void) { - /* 1ms ticks */ + /* SYS_HZ ticks per second */ gptimer->e[0].val = 0; - gptimer->e[0].rld = 999; /* (((1000000 / 100) - 1)) */ + gptimer->e[0].rld = (TIMER_BASE_CLK / CONFIG_SYS_HZ) - 1; gptimer->e[0].ctrl = (LEON3_GPTIMER_EN | LEON3_GPTIMER_RL | LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN); @@ -224,14 +227,12 @@ int timer_interrupt_init_cpu(void) */ unsigned long cpu_usec2ticks(unsigned long usec) { - /* timer set to 1kHz ==> 1 clk tick = 1 msec */ - if (usec < 1000) + if (usec < US_PER_TICK) return 1; - return (usec / 1000); + return usec / US_PER_TICK; } unsigned long cpu_ticks2usec(unsigned long ticks) { - /* 1tick = 1usec */ - return ticks * 1000; + return ticks * US_PER_TICK; } |