#include <linux/topology.h>
#include <linux/types.h>
-struct cpufreq_arm_bL_ops {
- char name[CPUFREQ_NAME_LEN];
-
- /*
- * This must set opp table for cpu_dev in a similar way as done by
- * dev_pm_opp_of_add_table().
- */
- int (*init_opp_table)(const struct cpumask *cpumask);
-
- /* Optional */
- int (*get_transition_latency)(struct device *cpu_dev);
- void (*free_opp_table)(const struct cpumask *cpumask);
-};
-
/* Currently we support only two clusters */
#define A15_CLUSTER 0
#define A7_CLUSTER 1
#define VIRT_FREQ(cluster, freq) ((cluster == A7_CLUSTER) ? freq >> 1 : freq)
static struct thermal_cooling_device *cdev[MAX_CLUSTERS];
-static const struct cpufreq_arm_bL_ops *arm_bL_ops;
static struct clk *clk[MAX_CLUSTERS];
static struct cpufreq_frequency_table *freq_table[MAX_CLUSTERS + 1];
static atomic_t cluster_usage[MAX_CLUSTERS + 1];
return rate;
}
-static unsigned int bL_cpufreq_get_rate(unsigned int cpu)
+static unsigned int ve_spc_cpufreq_get_rate(unsigned int cpu)
{
if (is_bL_switching_enabled()) {
pr_debug("%s: freq: %d\n", __func__, per_cpu(cpu_last_req_freq,
}
static unsigned int
-bL_cpufreq_set_rate(u32 cpu, u32 old_cluster, u32 new_cluster, u32 rate)
+ve_spc_cpufreq_set_rate(u32 cpu, u32 old_cluster, u32 new_cluster, u32 rate)
{
u32 new_rate, prev_rate;
int ret;
}
/* Set clock frequency */
-static int bL_cpufreq_set_target(struct cpufreq_policy *policy,
- unsigned int index)
+static int ve_spc_cpufreq_set_target(struct cpufreq_policy *policy,
+ unsigned int index)
{
u32 cpu = policy->cpu, cur_cluster, new_cluster, actual_cluster;
unsigned int freqs_new;
}
}
- ret = bL_cpufreq_set_rate(cpu, actual_cluster, new_cluster, freqs_new);
+ ret = ve_spc_cpufreq_set_rate(cpu, actual_cluster, new_cluster,
+ freqs_new);
if (!ret) {
arch_set_freq_scale(policy->related_cpus, freqs_new,
clk_put(clk[cluster]);
dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table[cluster]);
- if (arm_bL_ops->free_opp_table)
- arm_bL_ops->free_opp_table(cpumask);
dev_dbg(cpu_dev, "%s: cluster: %d\n", __func__, cluster);
}
if (freq_table[cluster])
return 0;
- ret = arm_bL_ops->init_opp_table(cpumask);
- if (ret) {
- dev_err(cpu_dev, "%s: init_opp_table failed, cpu: %d, err: %d\n",
- __func__, cpu_dev->id, ret);
+ /*
+ * platform specific SPC code must initialise the opp table
+ * so just check if the OPP count is non-zero
+ */
+ ret = dev_pm_opp_get_opp_count(cpu_dev) <= 0;
+ if (ret)
goto out;
- }
ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &freq_table[cluster]);
if (ret) {
dev_err(cpu_dev, "%s: failed to init cpufreq table, cpu: %d, err: %d\n",
__func__, cpu_dev->id, ret);
- goto free_opp_table;
+ goto out;
}
clk[cluster] = clk_get(cpu_dev, NULL);
ret = PTR_ERR(clk[cluster]);
dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table[cluster]);
-free_opp_table:
- if (arm_bL_ops->free_opp_table)
- arm_bL_ops->free_opp_table(cpumask);
out:
dev_err(cpu_dev, "%s: Failed to get data for cluster: %d\n", __func__,
cluster);
}
/* Per-CPU initialization */
-static int bL_cpufreq_init(struct cpufreq_policy *policy)
+static int ve_spc_cpufreq_init(struct cpufreq_policy *policy)
{
u32 cur_cluster = cpu_to_cluster(policy->cpu);
struct device *cpu_dev;
return ret;
policy->freq_table = freq_table[cur_cluster];
- policy->cpuinfo.transition_latency =
- arm_bL_ops->get_transition_latency(cpu_dev);
+ policy->cpuinfo.transition_latency = 1000000; /* 1 ms */
dev_pm_opp_of_register_em(policy->cpus);
return 0;
}
-static int bL_cpufreq_exit(struct cpufreq_policy *policy)
+static int ve_spc_cpufreq_exit(struct cpufreq_policy *policy)
{
struct device *cpu_dev;
int cur_cluster = cpu_to_cluster(policy->cpu);
return 0;
}
-static void bL_cpufreq_ready(struct cpufreq_policy *policy)
+static void ve_spc_cpufreq_ready(struct cpufreq_policy *policy)
{
int cur_cluster = cpu_to_cluster(policy->cpu);
cdev[cur_cluster] = of_cpufreq_cooling_register(policy);
}
-static struct cpufreq_driver bL_cpufreq_driver = {
- .name = "arm-big-little",
+static struct cpufreq_driver ve_spc_cpufreq_driver = {
+ .name = "vexpress-spc",
.flags = CPUFREQ_STICKY |
CPUFREQ_HAVE_GOVERNOR_PER_POLICY |
CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = cpufreq_generic_frequency_table_verify,
- .target_index = bL_cpufreq_set_target,
- .get = bL_cpufreq_get_rate,
- .init = bL_cpufreq_init,
- .exit = bL_cpufreq_exit,
- .ready = bL_cpufreq_ready,
+ .target_index = ve_spc_cpufreq_set_target,
+ .get = ve_spc_cpufreq_get_rate,
+ .init = ve_spc_cpufreq_init,
+ .exit = ve_spc_cpufreq_exit,
+ .ready = ve_spc_cpufreq_ready,
.attr = cpufreq_generic_attr,
};
switch (action) {
case BL_NOTIFY_PRE_ENABLE:
case BL_NOTIFY_PRE_DISABLE:
- cpufreq_unregister_driver(&bL_cpufreq_driver);
+ cpufreq_unregister_driver(&ve_spc_cpufreq_driver);
break;
case BL_NOTIFY_POST_ENABLE:
set_switching_enabled(true);
- cpufreq_register_driver(&bL_cpufreq_driver);
+ cpufreq_register_driver(&ve_spc_cpufreq_driver);
break;
case BL_NOTIFY_POST_DISABLE:
set_switching_enabled(false);
- cpufreq_register_driver(&bL_cpufreq_driver);
+ cpufreq_register_driver(&ve_spc_cpufreq_driver);
break;
default:
static int __bLs_unregister_notifier(void) { return 0; }
#endif
-int bL_cpufreq_register(const struct cpufreq_arm_bL_ops *ops)
+static int ve_spc_cpufreq_probe(struct platform_device *pdev)
{
int ret, i;
- if (arm_bL_ops) {
- pr_debug("%s: Already registered: %s, exiting\n", __func__,
- arm_bL_ops->name);
- return -EBUSY;
- }
-
- if (!ops || !strlen(ops->name) || !ops->init_opp_table ||
- !ops->get_transition_latency) {
- pr_err("%s: Invalid arm_bL_ops, exiting\n", __func__);
- return -ENODEV;
- }
-
- arm_bL_ops = ops;
-
set_switching_enabled(bL_switcher_get_enabled());
for (i = 0; i < MAX_CLUSTERS; i++)
mutex_init(&cluster_lock[i]);
- ret = cpufreq_register_driver(&bL_cpufreq_driver);
+ ret = cpufreq_register_driver(&ve_spc_cpufreq_driver);
if (ret) {
pr_info("%s: Failed registering platform driver: %s, err: %d\n",
- __func__, ops->name, ret);
- arm_bL_ops = NULL;
+ __func__, ve_spc_cpufreq_driver.name, ret);
} else {
ret = __bLs_register_notifier();
- if (ret) {
- cpufreq_unregister_driver(&bL_cpufreq_driver);
- arm_bL_ops = NULL;
- } else {
+ if (ret)
+ cpufreq_unregister_driver(&ve_spc_cpufreq_driver);
+ else
pr_info("%s: Registered platform driver: %s\n",
- __func__, ops->name);
- }
+ __func__, ve_spc_cpufreq_driver.name);
}
bL_switcher_put_enabled();
return ret;
}
-void bL_cpufreq_unregister(const struct cpufreq_arm_bL_ops *ops)
+static int ve_spc_cpufreq_remove(struct platform_device *pdev)
{
- if (arm_bL_ops != ops) {
- pr_err("%s: Registered with: %s, can't unregister, exiting\n",
- __func__, arm_bL_ops->name);
- return;
- }
-
bL_switcher_get_enabled();
__bLs_unregister_notifier();
- cpufreq_unregister_driver(&bL_cpufreq_driver);
+ cpufreq_unregister_driver(&ve_spc_cpufreq_driver);
bL_switcher_put_enabled();
pr_info("%s: Un-registered platform driver: %s\n", __func__,
- arm_bL_ops->name);
- arm_bL_ops = NULL;
-}
-
-static int ve_spc_init_opp_table(const struct cpumask *cpumask)
-{
- struct device *cpu_dev = get_cpu_device(cpumask_first(cpumask));
- /*
- * platform specific SPC code must initialise the opp table
- * so just check if the OPP count is non-zero
- */
- return dev_pm_opp_get_opp_count(cpu_dev) <= 0;
-}
-
-static int ve_spc_get_transition_latency(struct device *cpu_dev)
-{
- return 1000000; /* 1 ms */
-}
-
-static const struct cpufreq_arm_bL_ops ve_spc_cpufreq_ops = {
- .name = "vexpress-spc",
- .get_transition_latency = ve_spc_get_transition_latency,
- .init_opp_table = ve_spc_init_opp_table,
-};
-
-static int ve_spc_cpufreq_probe(struct platform_device *pdev)
-{
- return bL_cpufreq_register(&ve_spc_cpufreq_ops);
-}
-
-static int ve_spc_cpufreq_remove(struct platform_device *pdev)
-{
- bL_cpufreq_unregister(&ve_spc_cpufreq_ops);
+ ve_spc_cpufreq_driver.name);
return 0;
}
projects / linux-2.6-microblaze.git / commitdiff