From: Dirk Brandewie <dirk.j.brandewie@xxxxxxxxx>
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@xxxxxxxxx>
Cc: 3.13+ <stable@xxxxxxxxxxxxxxx> # 3.13.x: 007bea09 intel_pstate: Add setting
Cc: 3.13+ <stable@xxxxxxxxxxxxxxx> # 3.13+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
---
drivers/cpufreq/intel_pstate.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index deb04cc..e908161 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,
},
--
1.8.3.1
--
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