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sys: clamp frequency set in generic driver on exit

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This commit is contained in:
Miroslav Lichvar 2015-04-10 10:21:26 +02:00
parent 39c2bcd462
commit ad942e352d
1 changed files with 14 additions and 6 deletions
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20
sys_generic.c
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@ -107,6 +107,18 @@ handle_step(struct timeval *raw, struct timeval *cooked, double dfreq,
}
}
/* ================================================== */
static double
clamp_freq(double freq)
{
if (freq > max_freq)
return max_freq;
if (freq < -max_freq)
return -max_freq;
return freq;
}
/* ================================================== */
/* End currently running slew and start a new one */
@ -144,11 +156,7 @@ update_slew(void)
corr_freq = max_corr_freq;
/* Get the new real frequency and clamp it */
total_freq = base_freq + corr_freq * (1.0e6 - base_freq);
if (total_freq > max_freq)
total_freq = max_freq;
else if (total_freq < -max_freq)
total_freq = -max_freq;
total_freq = clamp_freq(base_freq + corr_freq * (1.0e6 - base_freq));
/* Set the new frequency (the actual frequency returned by the call may be
slightly different from the requested frequency due to rounding) */
@ -330,7 +338,7 @@ SYS_Generic_Finalise(void)
slew_timer_running = 0;
}
(*drv_set_freq)(base_freq);
(*drv_set_freq)(clamp_freq(base_freq));
}
/* ================================================== */