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Return actual frequency in drv_set_freq functions

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This is needed to keep sourcestats accurate when the actual frequency is
different from the requested frequency due to clamping (or possibly
rounding in future system drivers).
This commit is contained in:
Miroslav Lichvar
2010-04-20 18:29:39 +02:00
parent c15db71f9e
commit 1a7415a6ab
10 changed files with 45 additions and 22 deletions
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29
local.c
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@@ -394,7 +394,7 @@ LCL_SetAbsoluteFrequency(double afreq_ppm)
/* Call the system-specific driver for setting the frequency */
(*drv_set_freq)(afreq_ppm);
afreq_ppm = (*drv_set_freq)(afreq_ppm);
dfreq = (afreq_ppm - current_freq_ppm) / (1.0e6 + current_freq_ppm);
@@ -417,6 +417,9 @@ LCL_AccumulateDeltaFrequency(double dfreq)
{
ChangeListEntry *ptr;
struct timeval raw, cooked;
double old_freq_ppm;
old_freq_ppm = current_freq_ppm;
/* Work out new absolute frequency. Note that absolute frequencies
are handled in units of ppm, whereas the 'dfreq' argument is in
@@ -425,7 +428,8 @@ LCL_AccumulateDeltaFrequency(double dfreq)
current_freq_ppm = (1.0 + dfreq) * current_freq_ppm + 1.0e6 * dfreq;
/* Call the system-specific driver for setting the frequency */
(*drv_set_freq)(current_freq_ppm);
current_freq_ppm = (*drv_set_freq)(current_freq_ppm);
dfreq = (current_freq_ppm - old_freq_ppm) / (1.0e6 + old_freq_ppm);
LCL_ReadRawTime(&raw);
LCL_CookTime(&raw, &cooked, NULL);
@@ -510,7 +514,9 @@ LCL_AccumulateFrequencyAndOffset(double dfreq, double doffset)
#endif
/* Call the system-specific driver for setting the frequency */
(*drv_set_freq)(current_freq_ppm);
current_freq_ppm = (*drv_set_freq)(current_freq_ppm);
dfreq = (current_freq_ppm - old_freq_ppm) / (1.0e6 + old_freq_ppm);
(*drv_accrue_offset)(doffset);
/* Dispatch to all handlers */
@@ -599,25 +605,30 @@ LCL_SetLeap(int leap)
/* ================================================== */
void
double
LCL_SetTempComp(double comp)
{
double uncomp_freq_ppm;
if (temp_comp_ppm == comp)
return;
return comp;
/* Undo previous compensation */
current_freq_ppm = (current_freq_ppm + temp_comp_ppm) /
(1.0 - 1.0e-6 * temp_comp_ppm);
uncomp_freq_ppm = current_freq_ppm;
/* Apply new compensation */
current_freq_ppm = current_freq_ppm * (1.0 - 1.0e-6 * comp) - comp;
temp_comp_ppm = comp;
/* Call the system-specific driver for setting the frequency */
(*drv_set_freq)(current_freq_ppm);
current_freq_ppm = (*drv_set_freq)(current_freq_ppm);
return;
temp_comp_ppm = (uncomp_freq_ppm - current_freq_ppm) /
(1.0e-6 * uncomp_freq_ppm + 1.0);
return temp_comp_ppm;
}
/* ================================================== */