| Message ID | 1346275524-13817-1-git-send-email-will.deacon@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 8/29/2012 2:25 PM, Will Deacon wrote: > The delay functions may be called by some platforms between switching to > the timer-based delay loop but before calibration. In this case, the > initial loops_per_jiffy may not be suitable for the timer (although a > compromise may be achievable) and delay times may be considered too > inaccurate. > > This patch updates loops_per_jiffy when switching to the timer-based > delay loop so that delays are consistent prior to calibration. > > Signed-off-by: Will Deacon <will.deacon@arm.com> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
diff --git a/arch/arm/lib/delay.c b/arch/arm/lib/delay.c index d6dacc6..395d5fb 100644 --- a/arch/arm/lib/delay.c +++ b/arch/arm/lib/delay.c @@ -59,6 +59,7 @@ void __init init_current_timer_delay(unsigned long freq) { pr_info("Switching to timer-based delay loop\n"); lpj_fine = freq / HZ; + loops_per_jiffy = lpj_fine; arm_delay_ops.delay = __timer_delay; arm_delay_ops.const_udelay = __timer_const_udelay; arm_delay_ops.udelay = __timer_udelay;
The delay functions may be called by some platforms between switching to the timer-based delay loop but before calibration. In this case, the initial loops_per_jiffy may not be suitable for the timer (although a compromise may be achievable) and delay times may be considered too inaccurate. This patch updates loops_per_jiffy when switching to the timer-based delay loop so that delays are consistent prior to calibration. Signed-off-by: Will Deacon <will.deacon@arm.com> --- arch/arm/lib/delay.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-)