Commit 41bad47f authored by Srinivas Pandruvada's avatar Srinivas Pandruvada Committed by Rafael J. Wysocki
Browse files

cpufreq: intel_pstate: Broxton support 



Add Broxton CPU model number.

Broxton requires core_params to get performance limits via MSRs, but
it is an Atom platform, which requires more power optimized algorithm.

So the P state selection will use similar algorithm as other Atom
platforms.

Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent ae892d15

drivers/cpufreq/intel_pstate.c

+21 −0
Original line number Diff line number Diff line
@@ -1110,6 +1110,26 @@ static struct cpu_defaults knl_params = { 
	},

};



static struct cpu_defaults bxt_params = {

	.pid_policy = {

		.sample_rate_ms = 10,

		.deadband = 0,

		.setpoint = 60,

		.p_gain_pct = 14,

		.d_gain_pct = 0,

		.i_gain_pct = 4,

	},

	.funcs = {

		.get_max = core_get_max_pstate,

		.get_max_physical = core_get_max_pstate_physical,

		.get_min = core_get_min_pstate,

		.get_turbo = core_get_turbo_pstate,

		.get_scaling = core_get_scaling,

		.get_val = core_get_val,

		.get_target_pstate = get_target_pstate_use_cpu_load,

	},

};



static void intel_pstate_get_min_max(struct cpudata *cpu, int *min, int *max)

{

	int max_perf = cpu->pstate.turbo_pstate;
@@ -1370,6 +1390,7 @@ static const struct x86_cpu_id intel_pstate_cpu_ids[] = { 
	ICPU(INTEL_FAM6_SKYLAKE_DESKTOP,	core_params),

	ICPU(INTEL_FAM6_BROADWELL_XEON_D,	core_params),

	ICPU(INTEL_FAM6_XEON_PHI_KNL,		knl_params),

	ICPU(INTEL_FAM6_ATOM_GOLDMONT,		bxt_params),

	{}

};

MODULE_DEVICE_TABLE(x86cpu, intel_pstate_cpu_ids);

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