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| author | Jesse Ahrens <jahrens@centtech.com> | 2008-01-17 15:25:08 -0600 |
|---|---|---|
| committer | Dave Jones <davej@redhat.com> | 2008-02-06 22:57:58 -0500 |
| commit | 535ae38c9f4025faadedd17fac5f11e79e1cfdb2 (patch) | |
| tree | 1449c7d7f0e885293552a0d74b3159038dca6cd0 /arch | |
| parent | 6c9cda78b4f1fb89b0b6b8c03ce55dbdf0b1bdef (diff) | |
| download | kernel_samsung_smdk4412-535ae38c9f4025faadedd17fac5f11e79e1cfdb2.zip kernel_samsung_smdk4412-535ae38c9f4025faadedd17fac5f11e79e1cfdb2.tar.gz kernel_samsung_smdk4412-535ae38c9f4025faadedd17fac5f11e79e1cfdb2.tar.bz2 | |
[CPUFREQ] Support Model D parts and newer in e_powersaver
Patch by VIA that updates e_powersaver.c to work with our model D parts
and newer.
From: Jesse Ahrens <jahrens@centtech.com>
Signed-off-by: Dave Jones <davej@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/cpu/cpufreq/e_powersaver.c | 37 |
1 files changed, 32 insertions, 5 deletions
diff --git a/arch/x86/kernel/cpu/cpufreq/e_powersaver.c b/arch/x86/kernel/cpu/cpufreq/e_powersaver.c index 326a4c8..34a227e 100644 --- a/arch/x86/kernel/cpu/cpufreq/e_powersaver.c +++ b/arch/x86/kernel/cpu/cpufreq/e_powersaver.c @@ -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; @@ -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; @@ -93,6 +95,15 @@ postchange: 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; } @@ -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; @@ -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"); @@ -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; @@ -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; @@ -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; |