Messages in this thread Patch in this message | | | Date | Tue, 18 Feb 2003 22:42:20 +0100 | From | Pavel Machek <> | Subject | Select voltage manually in cpufreq |
| |
Hi!
I've added possibility to manualy force specified frequency and voltage... That's fairly usefull for testing, and I believe this (or something equivalent) is needed because every 2nd bios seems to be b0rken.
Take a look and apply if you want to... Pavel
--- clean/arch/i386/kernel/cpu/cpufreq/powernow-k7.c 2003-02-15 18:51:11.000000000 +0100 +++ linux/arch/i386/kernel/cpu/cpufreq/powernow-k7.c 2003-02-18 17:36:29.000000000 +0100 @@ -210,7 +210,7 @@ } -static void change_speed (unsigned int index) +static void change_speed (unsigned int index, unsigned int voltage) { u8 fid, vid; struct cpufreq_freqs freqs; @@ -226,6 +226,14 @@ fid = powernow_table[index].index & 0xFF; vid = (powernow_table[index].index & 0xFF00) >> 8; + if (voltage) { + int i; + for (i=0; i<32; i++) + if (mobile_vid_table[i] == voltage) + vid = i; + printk("Voltage overriden to %d mV, index 0x%x\n", voltage, vid); + } + freqs.cpu = 0; rdmsrl (MSR_K7_FID_VID_STATUS, fidvidstatus.val); @@ -338,7 +346,7 @@ if (cpufreq_frequency_table_target(policy, powernow_table, target_freq, relation, &newstate)) return -EINVAL; - change_speed(newstate); + change_speed(newstate, policy->voltage); return 0; } --- clean/drivers/cpufreq/proc_intf.c 2003-02-18 12:24:32.000000000 +0100 +++ linux/drivers/cpufreq/proc_intf.c 2003-02-18 14:23:48.000000000 +0100 @@ -28,6 +28,7 @@ unsigned int min = 0; unsigned int max = 0; unsigned int cpu = 0; + unsigned int voltage = 0; char str_governor[16]; struct cpufreq_policy current_policy; unsigned int result = -EFAULT; @@ -37,9 +38,24 @@ policy->min = 0; policy->max = 0; + policy->voltage = 0; policy->policy = 0; policy->cpu = CPUFREQ_ALL_CPUS; + if (sscanf(input_string, "%d:%d:%d:%15s", &cpu, &min, &voltage, str_governor) == 4) + { + if (!strcmp(str_governor, "mVforce")) { + printk("Have request to go to %d mV\n", voltage); + policy->min = min; + policy->max = min; + policy->voltage = voltage; + policy->cpu = cpu; + result = 0; + policy->policy = CPUFREQ_POLICY_PERFORMANCE; + return 0; + } + } + if (sscanf(input_string, "%d:%d:%d:%15s", &cpu, &min, &max, str_governor) == 4) { policy->min = min; --- clean/include/linux/cpufreq.h 2003-02-18 12:24:38.000000000 +0100 +++ linux/include/linux/cpufreq.h 2003-02-18 12:25:10.000000000 +0100 @@ -63,6 +63,7 @@ unsigned int min; /* in kHz */ unsigned int max; /* in kHz */ unsigned int policy; /* see above */ + unsigned int voltage;/* in mV, 0 == trust bios */ struct cpufreq_governor *governor; /* see below */ struct cpufreq_cpuinfo cpuinfo; /* see above */ struct intf_data intf; /* interface data */ -- When do you have a heart between your knees? [Johanka's followup: and *two* hearts?] - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |