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spark powermanager: SetCpuFreq now actually does what its name says

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martii
2012-07-13 16:27:13 +02:00
parent 6e8bdf5c34
commit bcaf83a8c7
1 changed files with 27 additions and 0 deletions
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27
libspark/pwrmngr.cpp
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@@ -14,7 +14,22 @@ void cCpuFreqManager::Down(void) { lt_debug("%s\n", __FUNCTION__); }
void cCpuFreqManager::Reset(void) { lt_debug("%s\n", __FUNCTION__); }
/* those function dummies return true or "harmless" values */
bool cCpuFreqManager::SetDelta(unsigned long) { lt_debug("%s\n", __FUNCTION__); return true; }
#ifdef MARTII
unsigned long cCpuFreqManager::GetCpuFreq(void) {
int freq = 0;
if (FILE *pll0 = fopen("/proc/cpu_frequ/pll0_ndiv_mdiv", "r")) {
char buffer[120];
while(fgets(buffer, sizeof(buffer), pll0)) {
if (1 == sscanf(buffer, "SH4 = %d MHZ", &freq))
break;
}
fclose(pll0);
return 1000 * 1000 * (unsigned long) freq;
}
}
#else
unsigned long cCpuFreqManager::GetCpuFreq(void) { lt_debug("%s\n", __FUNCTION__); return 0; }
#endif
unsigned long cCpuFreqManager::GetDelta(void) { lt_debug("%s\n", __FUNCTION__); return 0; }
//
cCpuFreqManager::cCpuFreqManager(void) { lt_debug("%s\n", __FUNCTION__); }
@@ -32,6 +47,17 @@ bool cPowerManager::SetStandby(bool Active, bool Passive)
bool cCpuFreqManager::SetCpuFreq(unsigned long f)
{
#ifdef MARTII
if (f == 0)
f = 450000000;
FILE *pll0 = fopen ("/proc/cpu_frequ/pll0_ndiv_mdiv", "w");
if (pll0) {
f /= 1000000;
fprintf(pll0, "%d\n", f/10 * 256 + 3);
fclose (pll0);
return 0;
}
#else
/* actually SetCpuFreq is used to determine if the system is in standby
this is an "elegant" hack, because:
* during a recording, cpu freq is kept "high", even if the box is sent to standby
@@ -64,6 +90,7 @@ bool cCpuFreqManager::SetCpuFreq(unsigned long f)
}
close(fd);
#endif
#endif
return true;
}