* REGISTER / UNREGISTER CPUFREQ DRIVER *
*********************************************************************/
+static char cpufreq_driver_name[CPUFREQ_NAME_LEN];
+
+static int __init cpufreq_driver_setup(char *str)
+{
+ strlcpy(cpufreq_driver_name, str, CPUFREQ_NAME_LEN);
+ return 1;
+}
+
+/*
+ * Set this name to only allow one specific cpu freq driver, e.g.,
+ * cpufreq_driver=powernow-k8
+ */
+__setup("cpufreq_driver=", cpufreq_driver_setup);
+
/**
* cpufreq_register_driver - register a CPU Frequency driver
* @driver_data: A struct cpufreq_driver containing the values#
((!driver_data->setpolicy) && (!driver_data->target)))
return -EINVAL;
- pr_debug("trying to register driver %s\n", driver_data->name);
+ pr_debug("trying to register driver %s, cpufreq_driver=%s\n",
+ driver_data->name, cpufreq_driver_name);
+
+ if (cpufreq_driver_name[0])
+ if (!driver_data->name ||
+ strcmp(cpufreq_driver_name, driver_data->name))
+ return -EINVAL;
if (driver_data->setpolicy)
driver_data->flags |= CPUFREQ_CONST_LOOPS;