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Commit 61d8d2ab authored by Dirk Brandewie's avatar Dirk Brandewie Committed by Rafael J. Wysocki
Browse files

intel_pstate: Add support for Baytrail turbo P states 



A documentation update exposed the existance of the turbo ratio
register. Update baytrail support to use the turbo range.

Signed-off-by: default avatarDirk Brandewie <dirk.j.brandewie@intel.com>
Cc: 3.13+ <stable@vger.kernel.org> # 3.13+
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 4042e757

drivers/cpufreq/intel_pstate.c

+12 −3
Original line number Diff line number Diff line
@@ -36,6 +36,8 @@ 


#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)
@@ -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,

	},