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authorPeng Fan <Peng.Fan@freescale.com>2015-08-26 15:40:58 +0800
committerStefano Babic <sbabic@denx.de>2015-10-30 14:59:43 +0100
commit2bb014820c49a63902103bac710bc86b5772e843 (patch)
tree7c1203f380ee2441cf9c34dcb2ac3e9dde01fb59 /arch/arm/imx-common/timer.c
parente573bdb324c78fac56655a493bea843842c9d9f8 (diff)
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>
Diffstat (limited to 'arch/arm/imx-common/timer.c')
-rw-r--r--arch/arm/imx-common/timer.c75
1 files changed, 2 insertions, 73 deletions
diff --git a/arch/arm/imx-common/timer.c b/arch/arm/imx-common/timer.c
index 1a88ce6862..92c7218e69 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;
-}