Commit 468ee73b authored by Dave Jones's avatar Dave Jones Committed by Dave Jones

[CPUFREQ] Sanity checks for voltage scaling in longhaul driver.

parent 41c84759
...@@ -469,12 +469,25 @@ static void __init longhaul_setup_voltagescaling (unsigned long lo, unsigned lon ...@@ -469,12 +469,25 @@ static void __init longhaul_setup_voltagescaling (unsigned long lo, unsigned lon
{ {
int revkey; int revkey;
can_scale_voltage = 1;
minvid = (hi & (1<<20|1<<21|1<<22|1<<23|1<<24)) >> 20; /* 56:52 */ minvid = (hi & (1<<20|1<<21|1<<22|1<<23|1<<24)) >> 20; /* 56:52 */
maxvid = (hi & (1<<4|1<<5|1<<6|1<<7|1<<8)) >> 4; /* 40:36 */ maxvid = (hi & (1<<4|1<<5|1<<6|1<<7|1<<8)) >> 4; /* 40:36 */
vrmrev = (lo & (1<<15))>>15; vrmrev = (lo & (1<<15))>>15;
if (minvid == 0 || maxvid == 0) {
printk ("longhaul: Bogus values Min:%d.%03d Max:%d.%03d. "
"Voltage scaling disabled.\n",
minvid/1000, minvid%1000, maxvid/1000, maxvid%1000);
return;
}
if (minvid == maxvid) {
printk ("longhaul: Claims to support voltage scaling but min & max are "
"both %d.%03d. Voltage scaling disabled\n",
maxvid/1000, maxvid%1000);
return;
}
if (vrmrev==0) { if (vrmrev==0) {
dprintk (KERN_INFO "longhaul: VRM 8.5 : "); dprintk (KERN_INFO "longhaul: VRM 8.5 : ");
memcpy (voltage_table, vrm85scales, sizeof(voltage_table)); memcpy (voltage_table, vrm85scales, sizeof(voltage_table));
...@@ -497,6 +510,8 @@ static void __init longhaul_setup_voltagescaling (unsigned long lo, unsigned lon ...@@ -497,6 +510,8 @@ static void __init longhaul_setup_voltagescaling (unsigned long lo, unsigned lon
maxvid = voltage_table[maxvid]; maxvid = voltage_table[maxvid];
dprintk ("Min VID=%d.%03d Max VID=%d.%03d, %d possible voltage scales\n", dprintk ("Min VID=%d.%03d Max VID=%d.%03d, %d possible voltage scales\n",
maxvid/1000, maxvid%1000, minvid/1000, minvid%1000, numvscales); maxvid/1000, maxvid%1000, minvid/1000, minvid%1000, numvscales);
can_scale_voltage = 1;
} }
......
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