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Commit 19e77c28 authored by Dirk Brandewie's avatar Dirk Brandewie Committed by Rafael J. Wysocki
Browse files

intel_pstate: Add Baytrail support 



Add support for the Baytrail processor.

Signed-off-by: default avatarDirk Brandewie <dirk.j.brandewie@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 016c8150

drivers/cpufreq/intel_pstate.c

+35 −0
Original line number Diff line number Diff line
@@ -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),