[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, 7 insertions, 2 deletions

diff --git a/include/asm-ia64/pal.h b/include/asm-ia64/pal.h
index 308e94f6299e..bc768153f3c9 100644
--- a/include/asm-ia64/pal.h
+++ b/include/asm-ia64/pal.h
@@ -84,6 +84,11 @@
 #define PAL_SET_PSTATE          263     /* set the P-state */
 #define PAL_BRAND_INFO          274     /* Processor branding information */
 
+#define PAL_GET_PSTATE_TYPE_LASTSET     0
+#define PAL_GET_PSTATE_TYPE_AVGANDRESET 1
+#define PAL_GET_PSTATE_TYPE_AVGNORESET  2
+#define PAL_GET_PSTATE_TYPE_INSTANT     3
+
 #ifndef __ASSEMBLY__
 
 #include <linux/types.h>
@@ -1141,10 +1146,10 @@ ia64_pal_halt_info (pal_power_mgmt_info_u_t *power_buf)
 
 /* Get the current P-state information */
 static inline s64
-ia64_pal_get_pstate (u64 *pstate_index)
+ia64_pal_get_pstate (u64 *pstate_index, unsigned long type)
 {
         struct ia64_pal_retval iprv;
-        PAL_CALL_STK(iprv, PAL_GET_PSTATE, 0, 0, 0);
+        PAL_CALL_STK(iprv, PAL_GET_PSTATE, type, 0, 0);
         *pstate_index = iprv.v0;
         return iprv.status;
 }