imx-common: timer: clean up code
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>
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 @@
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 @@
return 0;
}
-unsigned long long get_ticks(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)
+unsigned long timer_read_counter(void)
{
- 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 @@
{
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;
-}