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yaml
---
r: 84016
b: refs/heads/master
c: 535ae38
h: refs/heads/master
v: v3
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Jesse Ahrens authored and Dave Jones committed Feb 7, 2008
1 parent f92f4c5 commit 9f58cff
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Showing 2 changed files with 33 additions and 6 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 6c9cda78b4f1fb89b0b6b8c03ce55dbdf0b1bdef
refs/heads/master: 535ae38c9f4025faadedd17fac5f11e79e1cfdb2
37 changes: 32 additions & 5 deletions trunk/arch/x86/kernel/cpu/cpufreq/e_powersaver.c
Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@
#define EPS_BRAND_C7 1
#define EPS_BRAND_EDEN 2
#define EPS_BRAND_C3 3
#define EPS_BRAND_C7D 4

struct eps_cpu_data {
u32 fsb;
Expand Down Expand Up @@ -54,6 +55,7 @@ static int eps_set_state(struct eps_cpu_data *centaur,
{
struct cpufreq_freqs freqs;
u32 lo, hi;
u8 current_multiplier, current_voltage;
int err = 0;
int i;

Expand Down Expand Up @@ -93,6 +95,15 @@ static int eps_set_state(struct eps_cpu_data *centaur,
rdmsr(MSR_IA32_PERF_STATUS, lo, hi);
freqs.new = centaur->fsb * ((lo >> 8) & 0xff);

/* Print voltage and multiplier */
rdmsr(MSR_IA32_PERF_STATUS, lo, hi);
current_voltage = lo & 0xff;
printk(KERN_INFO "eps: Current voltage = %dmV\n",
current_voltage * 16 + 700);
current_multiplier = (lo >> 8) & 0xff;
printk(KERN_INFO "eps: Current multiplier = %d\n",
current_multiplier);

cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
return err;
}
Expand Down Expand Up @@ -141,9 +152,10 @@ static int eps_cpu_init(struct cpufreq_policy *policy)
u8 current_multiplier, current_voltage;
u8 max_multiplier, max_voltage;
u8 min_multiplier, min_voltage;
u8 brand;
u8 brand = 0;
u32 fsb;
struct eps_cpu_data *centaur;
struct cpuinfo_x86 *c = &cpu_data(0);
struct cpufreq_frequency_table *f_table;
int k, step, voltage;
int ret;
Expand All @@ -154,8 +166,20 @@ static int eps_cpu_init(struct cpufreq_policy *policy)

/* Check brand */
printk("eps: Detected VIA ");
rdmsr(0x1153, lo, hi);
brand = (((lo >> 2) ^ lo) >> 18) & 3;

switch (c->x86_model) {
case 10:
rdmsr(0x1153, lo, hi);
brand = (((lo >> 2) ^ lo) >> 18) & 3;
printk(KERN_CONT "Model A ");
break;
case 13:
rdmsr(0x1154, lo, hi);
brand = (((lo >> 4) ^ (lo >> 2))) & 0x000000ff;
printk(KERN_CONT "Model D ");
break;
}

switch(brand) {
case EPS_BRAND_C7M:
printk("C7-M\n");
Expand All @@ -166,6 +190,9 @@ static int eps_cpu_init(struct cpufreq_policy *policy)
case EPS_BRAND_EDEN:
printk("Eden\n");
break;
case EPS_BRAND_C7D:
printk(KERN_CONT "C7-D\n");
break;
case EPS_BRAND_C3:
printk("C3\n");
return -ENODEV;
Expand Down Expand Up @@ -208,7 +235,7 @@ static int eps_cpu_init(struct cpufreq_policy *policy)
if (current_multiplier > max_multiplier
|| max_multiplier <= min_multiplier)
return -EINVAL;
if (current_voltage > 0x1c || max_voltage > 0x1c)
if (current_voltage > 0x1f || max_voltage > 0x1f)
return -EINVAL;
if (max_voltage < min_voltage)
return -EINVAL;
Expand Down Expand Up @@ -310,7 +337,7 @@ static int __init eps_init(void)
/* This driver will work only on Centaur C7 processors with
* Enhanced SpeedStep/PowerSaver registers */
if (c->x86_vendor != X86_VENDOR_CENTAUR
|| c->x86 != 6 || c->x86_model != 10)
|| c->x86 != 6 || c->x86_model < 10)
return -ENODEV;
if (!cpu_has(c, X86_FEATURE_EST))
return -ENODEV;
Expand Down

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