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intel_pstate: Add Baytrail support

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Add support for the Baytrail processor.

Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Dirk Brandewie 2013-10-21 09:20:35 -07:00 committed by Rafael J. Wysocki
parent 016c815084
commit 19e77c28db
1 changed files with 35 additions and 0 deletions
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35
drivers/cpufreq/intel_pstate.c
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@ -33,6 +33,8 @@
#define SAMPLE_COUNT 3
#define BYT_RATIOS 0x66a
#define FRAC_BITS 8
#define int_tofp(X) ((int64_t)(X) << FRAC_BITS)
#define fp_toint(X) ((X) >> FRAC_BITS)
@ -342,6 +344,20 @@ static void intel_pstate_sysfs_expose_params(void)
}
/************************** sysfs end ************************/
static int byt_get_min_pstate(void)
{
u64 value;
rdmsrl(BYT_RATIOS, value);
return value & 0xFF;
}
static int byt_get_max_pstate(void)
{
u64 value;
rdmsrl(BYT_RATIOS, value);
return (value >> 16) & 0xFF;
}
static int core_get_min_pstate(void)
{
u64 value;
@ -396,6 +412,24 @@ static struct cpu_defaults core_params = {
},
};
static struct cpu_defaults byt_params = {
.pid_policy = {
.sample_rate_ms = 10,
.deadband = 0,
.setpoint = 97,
.p_gain_pct = 14,
.d_gain_pct = 0,
.i_gain_pct = 4,
},
.funcs = {
.get_max = byt_get_max_pstate,
.get_min = byt_get_min_pstate,
.get_turbo = byt_get_max_pstate,
.set = core_set_pstate,
},
};
static void intel_pstate_get_min_max(struct cpudata *cpu, int *min, int *max)
{
int max_perf = cpu->pstate.turbo_pstate;
@ -553,6 +587,7 @@ static void intel_pstate_timer_func(unsigned long __data)
static const struct x86_cpu_id intel_pstate_cpu_ids[] = {
ICPU(0x2a, core_params),
ICPU(0x2d, core_params),
ICPU(0x37, byt_params),
ICPU(0x3a, core_params),
ICPU(0x3c, core_params),
ICPU(0x3e, core_params),