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i.MX31: Add reset_timer() and modify get_timer_masked(). 

This patch adds the reset_timer() function (needed by nand_base.c) and
modifies the get_timer_masked() to work in the same way as the omap24xx
function.

Signed-off-by: Magnus Lilja <lilja.magnus@gmail.com>
This commit is contained in:
Magnus Lilja 2008-08-29 10:36:17 +02:00 committed by Jean-Christophe PLAGNIOL-VILLARD
parent 0b7c563989
commit 8c4ebec25b
1 changed files with 20 additions and 4 deletions
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24
cpu/arm1136/mx31/interrupts.c
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@ -38,6 +38,9 @@
#define GPTCR_CLKSOURCE_32 (4<<6) /* Clock source */
#define GPTCR_TEN (1) /* Timer enable */
static ulong timestamp;
static ulong lastinc;
/* nothing really to do with interrupts, just starts up a counter. */
int interrupt_init (void)
{
@ -54,14 +57,27 @@ int interrupt_init (void)
void reset_timer_masked (void)
{
GPTCR = 0;
GPTCR = GPTCR_CLKSOURCE_32 | GPTCR_TEN; /* Freerun Mode, PERCLK1 input */
/* reset time */
lastinc = GPTCNT; /* capture current incrementer value time */
timestamp = 0; /* start "advancing" time stamp from 0 */
}
void reset_timer(void)
{
reset_timer_masked();
}
ulong get_timer_masked (void)
{
ulong val = GPTCNT;
return val;
ulong now = GPTCNT; /* current tick value */
if (now >= lastinc) /* normal mode (non roll) */
/* move stamp forward with absolut diff ticks */
timestamp += (now - lastinc);
else /* we have rollover of incrementer */
timestamp += (0xFFFFFFFF - lastinc) + now;
lastinc = now;
return timestamp;
}
ulong get_timer (ulong base)