unsigned int max;
unsigned int nominal;
unsigned int nr_pstates;
+ bool wof_enabled;
} powernv_pstate_info;
/* Use following macros for conversions between pstate_id and index */
const __be32 *pstate_ids, *pstate_freqs;
u32 len_ids, len_freqs;
u32 pstate_min, pstate_max, pstate_nominal;
+ u32 pstate_turbo, pstate_ultra_turbo;
power_mgt = of_find_node_by_path("/ibm,opal/power-mgt");
if (!power_mgt) {
pr_warn("ibm,pstate-nominal not found\n");
return -ENODEV;
}
+
+ if (of_property_read_u32(power_mgt, "ibm,pstate-ultra-turbo",
+ &pstate_ultra_turbo)) {
+ powernv_pstate_info.wof_enabled = false;
+ goto next;
+ }
+
+ if (of_property_read_u32(power_mgt, "ibm,pstate-turbo",
+ &pstate_turbo)) {
+ powernv_pstate_info.wof_enabled = false;
+ goto next;
+ }
+
+ if (pstate_turbo == pstate_ultra_turbo)
+ powernv_pstate_info.wof_enabled = false;
+ else
+ powernv_pstate_info.wof_enabled = true;
+
+next:
pr_info("cpufreq pstate min %d nominal %d max %d\n", pstate_min,
pstate_nominal, pstate_max);
+ pr_info("Workload Optimized Frequency is %s in the platform\n",
+ (powernv_pstate_info.wof_enabled) ? "enabled" : "disabled");
pstate_ids = of_get_property(power_mgt, "ibm,pstate-ids", &len_ids);
if (!pstate_ids) {
powernv_pstate_info.nominal = i;
else if (id == pstate_min)
powernv_pstate_info.min = i;
+
+ if (powernv_pstate_info.wof_enabled && id == pstate_turbo) {
+ int j;
+
+ for (j = i - 1; j >= (int)powernv_pstate_info.max; j--)
+ powernv_freqs[j].flags = CPUFREQ_BOOST_FREQ;
+ }
}
/* End of list marker entry */
struct freq_attr cpufreq_freq_attr_cpuinfo_nominal_freq =
__ATTR_RO(cpuinfo_nominal_freq);
+#define SCALING_BOOST_FREQS_ATTR_INDEX 2
+
static struct freq_attr *powernv_cpu_freq_attr[] = {
&cpufreq_freq_attr_scaling_available_freqs,
&cpufreq_freq_attr_cpuinfo_nominal_freq,
+ &cpufreq_freq_attr_scaling_boost_freqs,
NULL,
};
register_reboot_notifier(&powernv_cpufreq_reboot_nb);
opal_message_notifier_register(OPAL_MSG_OCC, &powernv_cpufreq_opal_nb);
+ if (powernv_pstate_info.wof_enabled)
+ powernv_cpufreq_driver.boost_enabled = true;
+ else
+ powernv_cpu_freq_attr[SCALING_BOOST_FREQS_ATTR_INDEX] = NULL;
+
rc = cpufreq_register_driver(&powernv_cpufreq_driver);
- if (!rc)
- return 0;
+ if (rc) {
+ pr_info("Failed to register the cpufreq driver (%d)\n", rc);
+ goto cleanup_notifiers;
+ }
- pr_info("Failed to register the cpufreq driver (%d)\n", rc);
+ if (powernv_pstate_info.wof_enabled)
+ cpufreq_enable_boost_support();
+
+ return 0;
+cleanup_notifiers:
unregister_all_notifiers();
clean_chip_info();
out: