[PATCH] Add support for type argument in PAL_GET_PSTATE

PAL_GET_PSTATE accepts a type argument to return different kinds of
frequency information.
Refer: Intel Itanium®Architecture Software Developer's Manual -
Volume 2: System Architecture, Revision 2.2
(http://developer.intel.com/design/itanium/manuals/245318.htm)

Add the support for type argument and use Instantaneous frequency
in the acpi driver.

Also fix a bug, where in return value of PAL_GET_PSTATE was getting compared
with 'control' bits instead of 'status' bits.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 4 insertions, 7 deletions

diff --git a/arch/ia64/kernel/cpufreq/acpi-cpufreq.c b/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
index 86faf221a070..088f130197ae 100644
--- a/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
+++ b/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
@@ -68,7 +68,8 @@ processor_get_pstate (
 
         dprintk("processor_get_pstate\n");
 
-        retval = ia64_pal_get_pstate(&pstate_index);
+        retval = ia64_pal_get_pstate(&pstate_index,
+                                     PAL_GET_PSTATE_TYPE_INSTANT);
         *value = (u32) pstate_index;
 
         if (retval)
@@ -91,7 +92,7 @@ extract_clock (
         dprintk("extract_clock\n");
 
         for (i = 0; i < data->acpi_data.state_count; i++) {
-                if (value >= data->acpi_data.states[i].control)
+                if (value == data->acpi_data.states[i].status)
                         return data->acpi_data.states[i].core_frequency;
         }
         return data->acpi_data.states[i-1].core_frequency;
@@ -117,11 +118,7 @@ processor_get_freq (
                 goto migrate_end;
         }
 
-        /*
-         * processor_get_pstate gets the average frequency since the
-         * last get. So, do two PAL_get_freq()...
-         */
-        ret = processor_get_pstate(&value);
+        /* processor_get_pstate gets the instantaneous frequency */
         ret = processor_get_pstate(&value);
 
         if (ret) {