diff options
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/Kconfig | 5 | ||||
| -rw-r--r-- | drivers/cpufreq/Makefile | 5 | ||||
| -rw-r--r-- | drivers/cpufreq/cpufreq_stats.c | 11 | ||||
| -rw-r--r-- | drivers/cpufreq/longhaul.c | 10 |
4 files changed, 24 insertions, 7 deletions
diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig index ea512f47b78..e0a899f25e3 100644 --- a/drivers/cpufreq/Kconfig +++ b/drivers/cpufreq/Kconfig @@ -20,6 +20,9 @@ if CPU_FREQ config CPU_FREQ_TABLE tristate +config CPU_FREQ_GOV_COMMON + bool + config CPU_FREQ_STAT tristate "CPU frequency translation statistics" select CPU_FREQ_TABLE @@ -141,6 +144,7 @@ config CPU_FREQ_GOV_USERSPACE config CPU_FREQ_GOV_ONDEMAND tristate "'ondemand' cpufreq policy governor" select CPU_FREQ_TABLE + select CPU_FREQ_GOV_COMMON help 'ondemand' - This driver adds a dynamic cpufreq policy governor. The governor does a periodic polling and @@ -159,6 +163,7 @@ config CPU_FREQ_GOV_ONDEMAND config CPU_FREQ_GOV_CONSERVATIVE tristate "'conservative' cpufreq governor" depends on CPU_FREQ + select CPU_FREQ_GOV_COMMON help 'conservative' - this driver is rather similar to the 'ondemand' governor both in its source code and its purpose, the difference is diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile index 1f254ec087c..fadc4d496e2 100644 --- a/drivers/cpufreq/Makefile +++ b/drivers/cpufreq/Makefile @@ -7,8 +7,9 @@ obj-$(CONFIG_CPU_FREQ_STAT) += cpufreq_stats.o obj-$(CONFIG_CPU_FREQ_GOV_PERFORMANCE) += cpufreq_performance.o obj-$(CONFIG_CPU_FREQ_GOV_POWERSAVE) += cpufreq_powersave.o obj-$(CONFIG_CPU_FREQ_GOV_USERSPACE) += cpufreq_userspace.o -obj-$(CONFIG_CPU_FREQ_GOV_ONDEMAND) += cpufreq_ondemand.o cpufreq_governor.o -obj-$(CONFIG_CPU_FREQ_GOV_CONSERVATIVE) += cpufreq_conservative.o cpufreq_governor.o +obj-$(CONFIG_CPU_FREQ_GOV_ONDEMAND) += cpufreq_ondemand.o +obj-$(CONFIG_CPU_FREQ_GOV_CONSERVATIVE) += cpufreq_conservative.o +obj-$(CONFIG_CPU_FREQ_GOV_COMMON) += cpufreq_governor.o # CPUfreq cross-arch helpers obj-$(CONFIG_CPU_FREQ_TABLE) += freq_table.o diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c index e40e5080964..9d7732b8104 100644 --- a/drivers/cpufreq/cpufreq_stats.c +++ b/drivers/cpufreq/cpufreq_stats.c @@ -364,18 +364,21 @@ static int __init cpufreq_stats_init(void) if (ret) return ret; + register_hotcpu_notifier(&cpufreq_stat_cpu_notifier); + for_each_online_cpu(cpu) + cpufreq_update_policy(cpu); + ret = cpufreq_register_notifier(¬ifier_trans_block, CPUFREQ_TRANSITION_NOTIFIER); if (ret) { cpufreq_unregister_notifier(¬ifier_policy_block, CPUFREQ_POLICY_NOTIFIER); + unregister_hotcpu_notifier(&cpufreq_stat_cpu_notifier); + for_each_online_cpu(cpu) + cpufreq_stats_free_table(cpu); return ret; } - register_hotcpu_notifier(&cpufreq_stat_cpu_notifier); - for_each_online_cpu(cpu) { - cpufreq_update_policy(cpu); - } return 0; } static void __exit cpufreq_stats_exit(void) diff --git a/drivers/cpufreq/longhaul.c b/drivers/cpufreq/longhaul.c index f1fa500ac10..1180d536d1e 100644 --- a/drivers/cpufreq/longhaul.c +++ b/drivers/cpufreq/longhaul.c @@ -77,7 +77,7 @@ static unsigned int longhaul_index; static int scale_voltage; static int disable_acpi_c3; static int revid_errata; - +static int enable; /* Clock ratios multiplied by 10 */ static int mults[32]; @@ -965,6 +965,10 @@ static int __init longhaul_init(void) if (!x86_match_cpu(longhaul_id)) return -ENODEV; + if (!enable) { + printk(KERN_ERR PFX "Option \"enable\" not set. Aborting.\n"); + return -ENODEV; + } #ifdef CONFIG_SMP if (num_online_cpus() > 1) { printk(KERN_ERR PFX "More than 1 CPU detected, " @@ -1021,6 +1025,10 @@ MODULE_PARM_DESC(scale_voltage, "Scale voltage of processor"); * such. */ module_param(revid_errata, int, 0644); MODULE_PARM_DESC(revid_errata, "Ignore CPU Revision ID"); +/* By default driver is disabled to prevent incompatible + * system freeze. */ +module_param(enable, int, 0644); +MODULE_PARM_DESC(enable, "Enable driver"); MODULE_AUTHOR("Dave Jones <davej@redhat.com>"); MODULE_DESCRIPTION("Longhaul driver for VIA Cyrix processors."); |