summaryrefslogtreecommitdiff
path: root/drivers/cpufreq/intel_pstate.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/cpufreq/intel_pstate.c')
-rw-r--r--drivers/cpufreq/intel_pstate.c17
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index ece120da3353..3c3971256130 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -2394,6 +2394,18 @@ static bool __init intel_pstate_no_acpi_pss(void)
return true;
}
+static bool __init intel_pstate_no_acpi_pcch(void)
+{
+ acpi_status status;
+ acpi_handle handle;
+
+ status = acpi_get_handle(NULL, "\\_SB", &handle);
+ if (ACPI_FAILURE(status))
+ return true;
+
+ return !acpi_has_method(handle, "PCCH");
+}
+
static bool __init intel_pstate_has_acpi_ppc(void)
{
int i;
@@ -2453,7 +2465,10 @@ static bool __init intel_pstate_platform_pwr_mgmt_exists(void)
switch (plat_info[idx].data) {
case PSS:
- return intel_pstate_no_acpi_pss();
+ if (!intel_pstate_no_acpi_pss())
+ return false;
+
+ return intel_pstate_no_acpi_pcch();
case PPC:
return intel_pstate_has_acpi_ppc() && !force_load;
}