diff options
| author | Dirk Brandewie <dirk.j.brandewie@intel.com> | 2013-10-21 16:20:35 (GMT) |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-10-25 21:46:10 (GMT) |
| commit | 19e77c28dbf1972305da0dfeb92a62f83df3a91d (patch) | |
| tree | 48348ff456ca427844e4e162bc1329b08b140a03 /drivers | |
| parent | 016c815084d5b89f7c1a24b1a3a0b796512a91bc (diff) | |
| download | linux-19e77c28dbf1972305da0dfeb92a62f83df3a91d.tar.xz | |
intel_pstate: Add Baytrail support
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/cpufreq/intel_pstate.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 6b37c9f..27c2753 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -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), |