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ARM: atmel: armv7: switch to use common timer functions

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The commit 8dfafdd (Introduce common timer functions), add common
timer functions, we can use them directly.

Signed-off-by: Bo Shen <voice.shen@atmel.com>
[rebase on current master]
Sigend-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
This commit is contained in:
Bo Shen 2015-02-04 15:53:02 +08:00 committed by Andreas Bießmann
parent a02c8a31bd
commit a2df3a37d7
3 changed files with 6 additions and 61 deletions
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61
arch/arm/mach-at91/armv7/timer.c
View file

@ -36,22 +36,6 @@ DECLARE_GLOBAL_DATA_PTR;
#define TIMER_LOAD_VAL 0xfffff
static inline unsigned long long tick_to_time(unsigned long long tick)
{
tick *= CONFIG_SYS_HZ;
do_div(tick, gd->arch.timer_rate_hz);
return tick;
}
static inline unsigned long long usec_to_tick(unsigned long long usec)
{
usec *= gd->arch.timer_rate_hz;
do_div(usec, 1000000);
return usec;
}
/*
* Use the PITC in full 32 bit incrementing mode
*/
@ -67,54 +51,9 @@ int timer_init(void)
gd->arch.timer_rate_hz = get_pit_clk_rate() / 16;
gd->arch.tbu = 0;
gd->arch.tbl = 0;
return 0;
}
/*
* Get the current 64 bit timer tick count
*/
unsigned long long get_ticks(void)
{
at91_pit_t *pit = (at91_pit_t *)ATMEL_BASE_PIT;
ulong now = readl(&pit->piir);
/* 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;
}
void __udelay(unsigned long usec)
{
unsigned long long start;
ulong tmo;
start = get_ticks(); /* get current timestamp */
tmo = usec_to_tick(usec); /* convert usecs to ticks */
while ((get_ticks() - start) < tmo)
; /* loop till time has passed */
}
/*
* get_timer(base) can be used to check for timeouts or
* to measure elasped time relative to an event:
*
* ulong start_time = get_timer(0) sets start_time to the current
* time value.
* get_timer(start_time) returns the time elapsed since then.
*
* The time is used in CONFIG_SYS_HZ units!
*/
ulong get_timer(ulong base)
{
return tick_to_time(get_ticks()) - base;
}
/*
* Return the number of timer ticks per second.
*/

3
arch/arm/mach-at91/include/mach/sama5d3.h
View file

@ -189,6 +189,9 @@
#define PIO_SCDR_DIV 0x3fff
#define CPU_HAS_PCR
/* Timer */
#define CONFIG_SYS_TIMER_COUNTER 0xfffffe3c
/*
* PMECC table in ROM
*/

3
arch/arm/mach-at91/include/mach/sama5d4.h
View file

@ -193,6 +193,9 @@
#define cpu_is_sama5d44() (cpu_is_sama5d4() && \
(get_extension_chip_id() == ARCH_EXID_SAMA5D44))
/* Timer */
#define CONFIG_SYS_TIMER_COUNTER 0xfc06863c
/*
* No PMECC Galois table in ROM
*/