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Diffstat (limited to 'arch/powerpc/platforms/pseries/pseries_energy.c')
-rw-r--r--arch/powerpc/platforms/pseries/pseries_energy.c37
1 files changed, 2 insertions, 35 deletions
diff --git a/arch/powerpc/platforms/pseries/pseries_energy.c b/arch/powerpc/platforms/pseries/pseries_energy.c
index af281dce510a..a91e6dadda2c 100644
--- a/arch/powerpc/platforms/pseries/pseries_energy.c
+++ b/arch/powerpc/platforms/pseries/pseries_energy.c
@@ -21,6 +21,7 @@
#include <asm/cputhreads.h>
#include <asm/page.h>
#include <asm/hvcall.h>
+#include <asm/firmware.h>
#define MODULE_VERS "1.0"
@@ -32,40 +33,6 @@ static int sysfs_entries;
/* Helper routines */
-/*
- * Routine to detect firmware support for hcall
- * return 1 if H_BEST_ENERGY is supported
- * else return 0
- */
-
-static int check_for_h_best_energy(void)
-{
- struct device_node *rtas = NULL;
- const char *hypertas, *s;
- int length;
- int rc = 0;
-
- rtas = of_find_node_by_path("/rtas");
- if (!rtas)
- return 0;
-
- hypertas = of_get_property(rtas, "ibm,hypertas-functions", &length);
- if (!hypertas) {
- of_node_put(rtas);
- return 0;
- }
-
- /* hypertas will have list of strings with hcall names */
- for (s = hypertas; s < hypertas + length; s += strlen(s) + 1) {
- if (!strncmp("hcall-best-energy-1", s, 19)) {
- rc = 1; /* Found the string */
- break;
- }
- }
- of_node_put(rtas);
- return rc;
-}
-
/* Helper Routines to convert between drc_index to cpu numbers */
static u32 cpu_to_drc_index(int cpu)
@@ -262,7 +229,7 @@ static int __init pseries_energy_init(void)
int cpu, err;
struct device *cpu_dev;
- if (!check_for_h_best_energy()) {
+ if (!firmware_has_feature(FW_FEATURE_BEST_ENERGY)) {
printk(KERN_INFO "Hypercall H_BEST_ENERGY not supported\n");
return 0;
}