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Merge branch 'pm-cpufreq' 

* pm-cpufreq:
  intel_pstate: Add support for Baytrail turbo P states
  intel_pstate: Use LFM bus ratio as min ratio/P state
  cpufreq: powernow-k8: Initialize per-cpu data-structures properly
  cpufreq: remove sysfs link when a cpu != policy->cpu, is removed
This commit is contained in:
Rafael J. Wysocki 2014-02-21 01:28:23 +01:00
parent d8ad344cb4 61d8d2abc1
commit fee5ae96e0
3 changed files with 21 additions and 9 deletions
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3
drivers/cpufreq/cpufreq.c
View File

@ -1323,8 +1323,7 @@ static int __cpufreq_remove_dev_prepare(struct device *dev,
up_read(&policy->rwsem);
if (cpu != policy->cpu) {
if (!frozen)
sysfs_remove_link(&dev->kobj, "cpufreq");
sysfs_remove_link(&dev->kobj, "cpufreq");
} else if (cpus > 1) {
new_cpu = cpufreq_nominate_new_policy_cpu(policy, cpu);
if (new_cpu >= 0) {

17
drivers/cpufreq/intel_pstate.c
View File

@ -34,8 +34,10 @@
#define SAMPLE_COUNT 3
#define BYT_RATIOS 0x66a
#define BYT_VIDS 0x66b
#define BYT_RATIOS 0x66a
#define BYT_VIDS 0x66b
#define BYT_TURBO_RATIOS 0x66c
#define FRAC_BITS 8
#define int_tofp(X) ((int64_t)(X) << FRAC_BITS)
@ -357,7 +359,7 @@ static int byt_get_min_pstate(void)
{
u64 value;
rdmsrl(BYT_RATIOS, value);
return value & 0xFF;
return (value >> 8) & 0xFF;
}
static int byt_get_max_pstate(void)
@ -367,6 +369,13 @@ static int byt_get_max_pstate(void)
return (value >> 16) & 0xFF;
}
static int byt_get_turbo_pstate(void)
{
u64 value;
rdmsrl(BYT_TURBO_RATIOS, value);
return value & 0x3F;
}
static void byt_set_pstate(struct cpudata *cpudata, int pstate)
{
u64 val;
@ -469,7 +478,7 @@ static struct cpu_defaults byt_params = {
.funcs = {
.get_max = byt_get_max_pstate,
.get_min = byt_get_min_pstate,
.get_turbo = byt_get_max_pstate,
.get_turbo = byt_get_turbo_pstate,
.set = byt_set_pstate,
.get_vid = byt_get_vid,
},

10
drivers/cpufreq/powernow-k8.c
View File

@ -1076,7 +1076,7 @@ static int powernowk8_cpu_init(struct cpufreq_policy *pol)
{
struct powernow_k8_data *data;
struct init_on_cpu init_on_cpu;
int rc;
int rc, cpu;
smp_call_function_single(pol->cpu, check_supported_cpu, &rc, 1);
if (rc)
@ -1140,7 +1140,9 @@ static int powernowk8_cpu_init(struct cpufreq_policy *pol)
pr_debug("cpu_init done, current fid 0x%x, vid 0x%x\n",
data->currfid, data->currvid);
per_cpu(powernow_data, pol->cpu) = data;
/* Point all the CPUs in this policy to the same data */
for_each_cpu(cpu, pol->cpus)
per_cpu(powernow_data, cpu) = data;
return 0;
@ -1155,6 +1157,7 @@ err_out:
static int powernowk8_cpu_exit(struct cpufreq_policy *pol)
{
struct powernow_k8_data *data = per_cpu(powernow_data, pol->cpu);
int cpu;
if (!data)
return -EINVAL;
@ -1165,7 +1168,8 @@ static int powernowk8_cpu_exit(struct cpufreq_policy *pol)
kfree(data->powernow_table);
kfree(data);
per_cpu(powernow_data, pol->cpu) = NULL;
for_each_cpu(cpu, pol->cpus)
per_cpu(powernow_data, cpu) = NULL;
return 0;
}