We can reuse common functions in lib/time.c, but not reimplement functions in imx-common/time.c. Only keep timer_init ,get_tbclk and implement timer_read_counter in imx-common/time.c.
Signed-off-by: Peng Fan Peng.Fan@freescale.com Cc: Stefano Babic sbabic@denx.de Cc: Fabio Estevam fabio.estevam@freescale.com --- arch/arm/imx-common/timer.c | 75 ++------------------------------------------- 1 file changed, 2 insertions(+), 73 deletions(-)
diff --git a/arch/arm/imx-common/timer.c b/arch/arm/imx-common/timer.c index 1a88ce6..92c7218 100644 --- a/arch/arm/imx-common/timer.c +++ b/arch/arm/imx-common/timer.c @@ -66,25 +66,6 @@ static inline ulong gpt_get_clk(void) return MXC_CLK32; #endif } -static inline unsigned long long tick_to_time(unsigned long long tick) -{ - ulong gpt_clk = gpt_get_clk(); - - tick *= CONFIG_SYS_HZ; - do_div(tick, gpt_clk); - - return tick; -} - -static inline unsigned long long us_to_tick(unsigned long long usec) -{ - ulong gpt_clk = gpt_get_clk(); - - usec = usec * gpt_clk + 999999; - do_div(usec, 1000000); - - return usec; -}
int timer_init(void) { @@ -130,44 +111,9 @@ int timer_init(void) return 0; }
-unsigned long long get_ticks(void) +unsigned long timer_read_counter(void) { - ulong now = __raw_readl(&cur_gpt->counter); /* current tick value */ - - /* increment tbu if tbl has rolled over */ - if (now < gd->arch.tbl) - gd->arch.tbu++; - gd->arch.tbl = now; - return (((unsigned long long)gd->arch.tbu) << 32) | gd->arch.tbl; -} - -ulong get_timer_masked(void) -{ - /* - * get_ticks() returns a long long (64 bit), it wraps in - * 2^64 / GPT_CLK = 2^64 / 2^15 = 2^49 ~ 5 * 10^14 (s) ~ - * 5 * 10^9 days... and get_ticks() * CONFIG_SYS_HZ wraps in - * 5 * 10^6 days - long enough. - */ - return tick_to_time(get_ticks()); -} - -ulong get_timer(ulong base) -{ - return get_timer_masked() - base; -} - -/* delay x useconds AND preserve advance timstamp value */ -void __udelay(unsigned long usec) -{ - unsigned long long tmp; - ulong tmo; - - tmo = us_to_tick(usec); - tmp = get_ticks() + tmo; /* get current timestamp */ - - while (get_ticks() < tmp) /* loop till event */ - /*NOP*/; + return __raw_readl(&cur_gpt->counter); /* current tick value */ }
/* @@ -178,20 +124,3 @@ ulong get_tbclk(void) { return gpt_get_clk(); } - -/* - * This function is intended for SHORT delays only. - * It will overflow at around 10 seconds @ 400MHz, - * or 20 seconds @ 200MHz. - */ -unsigned long usec2ticks(unsigned long usec) -{ - ulong ticks; - - if (usec < 1000) - ticks = ((usec * (get_tbclk()/1000)) + 500) / 1000; - else - ticks = ((usec / 10) * (get_tbclk() / 100000)); - - return ticks; -}