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x86: timer: Use a separate flag for whether timer is inited

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At present the value of the timer base is used to determine whether the
timer has been set up or not. It is true that the timer is essentially
never exactly 0 when it is read. However 'time 0' may indicate the time
that the machine was reset so it is useful to be able to denote that.

Update the code to use a separate flag instead.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Aiden Park <aiden.park@intel.com>
Reviewed-by: Aiden Park <aiden.park@intel.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass
2019-10-20 21:37:47 -06:00
committed by Bin Meng
parent 096c71e34b
commit a478a26cd0
2 changed files with 3 additions and 1 deletions
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3
drivers/timer/tsc_timer.c
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@@ -394,7 +394,7 @@ static int tsc_timer_get_count(struct udevice *dev, u64 *count)
static void tsc_timer_ensure_setup(bool early)
{
if (gd->arch.tsc_base)
if (gd->arch.tsc_inited)
return;
gd->arch.tsc_base = rdtsc();
@@ -425,6 +425,7 @@ static void tsc_timer_ensure_setup(bool early)
done:
gd->arch.clock_rate = fast_calibrate * 1000000;
}
gd->arch.tsc_inited = true;
}
static int tsc_timer_probe(struct udevice *dev)