diff options
| author | Dirk Brandewie <dirk.j.brandewie@intel.com> | 2014-02-12 10:01:07 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-03-23 21:44:19 -0700 |
| commit | ef3d4124c55daf6d0c83da92577a5a8d9eb55b4f (patch) | |
| tree | 9eb18db20c94cb440a6573d43debe0aad59264fd /drivers | |
| parent | e08b9ad3bd45f09ab77b0d5974fe1f2ab2fea464 (diff) | |
intel_pstate: Add support for Baytrail turbo P states
commit 61d8d2abc15e9232c3914c55502b73e559366583 upstream.
A documentation update exposed the existance of the turbo ratio
register. Update baytrail support to use the turbo range.
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/cpufreq/intel_pstate.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 1d400a18ba5..b687df8b372 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -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) @@ -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, }, |