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qca: ipq806x: Fixed timer driver

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The logic used to calculate tick count in
_udelay() was always giving Zero. Updated
the logic to make it work across QCA boards.

Change-Id: Iebc5905003ad99e66b299de3beabb80ce40ce710
Signed-off-by: Aditya Kumar Patra S <apatr@codeaurora.org>
This commit is contained in:
Aditya Kumar Patra S 2016-11-04 21:10:37 +05:30 • committed by Gerrit - the friendly Code Review server
parent 467a26184d
commit 6d2e7fc8a6
1 changed files with 9 additions and 3 deletions
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12
arch/arm/cpu/armv7/qca/common/timer.c
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@ -137,12 +137,18 @@ void __udelay(unsigned long usec)
unsigned long long last;
unsigned long long runcount;
val = (usec * GPT_FREQ);
if (usec == 0)
return;
val = (usec * GPT_FREQ_KHZ) / 1000;
if (val == 0 )
val = 1; /* Wait for atleast 1 tick */
last = read_counter();
do {
now = read_counter();
if (last > now)
runcount = (GPT_FREQ - last) + now;
runcount = (TIMER_LOAD_VAL - last) + now;
else
runcount = now - last;
} while (runcount < val);
@ -177,7 +183,7 @@ ulong get_timer_masked(void)
/* move stamp forward with absolute diff ticks */
} else {
/* we have overflow of the count down timer */
timestamp += now + (TIMER_LOAD_VAL - lastinc);
timestamp += now + (gpt_to_sys_freq(TIMER_LOAD_VAL) - lastinc);
}
lastinc = now;