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Merge branch 'pm-cpufreq'

Browse source 
* pm-cpufreq:
  cpufreq: Make cpufreq_generic_init() return void
  cpufreq: imx-cpufreq-dt: Add i.MX8MN support
  cpufreq: Add QoS requests for userspace constraints
  cpufreq: intel_pstate: Reuse refresh_frequency_limits()
  cpufreq: Register notifiers with the PM QoS framework
  PM / QoS: Add support for MIN/MAX frequency constraints
  PM / QOS: Pass request type to dev_pm_qos_read_value()
  PM / QOS: Rename __dev_pm_qos_read_value() and dev_pm_qos_raw_read_value()
  PM / QOS: Pass request type to dev_pm_qos_{add|remove}_notifier()
This commit is contained in:
Rafael J. Wysocki 2019-07-18 09:49:30 +02:00
commit 918e162e6a
29 changed files with 378 additions and 184 deletions
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17
drivers/cpufreq/bmips-cpufreq.c
View file

@ -131,23 +131,18 @@ static int bmips_cpufreq_exit(struct cpufreq_policy *policy)
static int bmips_cpufreq_init(struct cpufreq_policy *policy)
{
struct cpufreq_frequency_table *freq_table;
int ret;
freq_table = bmips_cpufreq_get_freq_table(policy);
if (IS_ERR(freq_table)) {
ret = PTR_ERR(freq_table);
pr_err("%s: couldn't determine frequency table (%d).\n",
BMIPS_CPUFREQ_NAME, ret);
return ret;
pr_err("%s: couldn't determine frequency table (%ld).\n",
BMIPS_CPUFREQ_NAME, PTR_ERR(freq_table));
return PTR_ERR(freq_table);
}
ret = cpufreq_generic_init(policy, freq_table, TRANSITION_LATENCY);
if (ret)
bmips_cpufreq_exit(policy);
else
pr_info("%s: registered\n", BMIPS_CPUFREQ_NAME);
cpufreq_generic_init(policy, freq_table, TRANSITION_LATENCY);
pr_info("%s: registered\n", BMIPS_CPUFREQ_NAME);
return ret;
return 0;
}
static struct cpufreq_driver bmips_cpufreq_driver = {

264
drivers/cpufreq/cpufreq.c
View file

@ -23,6 +23,7 @@
#include <linux/kernel_stat.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/pm_qos.h>
#include <linux/slab.h>
#include <linux/suspend.h>
#include <linux/syscore_ops.h>
@ -158,7 +159,7 @@ EXPORT_SYMBOL_GPL(arch_set_freq_scale);
* - set policies transition latency
* - policy->cpus with all possible CPUs
*/
int cpufreq_generic_init(struct cpufreq_policy *policy,
void cpufreq_generic_init(struct cpufreq_policy *policy,
struct cpufreq_frequency_table *table,
unsigned int transition_latency)
{
@ -170,8 +171,6 @@ int cpufreq_generic_init(struct cpufreq_policy *policy,
* share the clock and voltage and clock.
*/
cpumask_setall(policy->cpus);
return 0;
}
EXPORT_SYMBOL_GPL(cpufreq_generic_init);
@ -714,23 +713,15 @@ static ssize_t show_scaling_cur_freq(struct cpufreq_policy *policy, char *buf)
static ssize_t store_##file_name \
(struct cpufreq_policy *policy, const char *buf, size_t count) \
{ \
int ret, temp; \
struct cpufreq_policy new_policy; \
unsigned long val; \
int ret; \
\
memcpy(&new_policy, policy, sizeof(*policy)); \
new_policy.min = policy->user_policy.min; \
new_policy.max = policy->user_policy.max; \
\
ret = sscanf(buf, "%u", &new_policy.object); \
ret = sscanf(buf, "%lu", &val); \
if (ret != 1) \
return -EINVAL; \
\
temp = new_policy.object; \
ret = cpufreq_set_policy(policy, &new_policy); \
if (!ret) \
policy->user_policy.object = temp; \
\
return ret ? ret : count; \
ret = dev_pm_qos_update_request(policy->object##_freq_req, val);\
return ret >= 0 ? count : ret; \
}
store_one(scaling_min_freq, min);
@ -996,7 +987,7 @@ static void add_cpu_dev_symlink(struct cpufreq_policy *policy, unsigned int cpu)
{
struct device *dev = get_cpu_device(cpu);
if (!dev)
if (unlikely(!dev))
return;
if (cpumask_test_and_set_cpu(cpu, policy->real_cpus))
@ -1112,17 +1103,18 @@ static int cpufreq_add_policy_cpu(struct cpufreq_policy *policy, unsigned int cp
return ret;
}
static void refresh_frequency_limits(struct cpufreq_policy *policy)
void refresh_frequency_limits(struct cpufreq_policy *policy)
{
struct cpufreq_policy new_policy = *policy;
struct cpufreq_policy new_policy;
pr_debug("updating policy for CPU %u\n", policy->cpu);
if (!policy_is_inactive(policy)) {
new_policy = *policy;
pr_debug("updating policy for CPU %u\n", policy->cpu);
new_policy.min = policy->user_policy.min;
new_policy.max = policy->user_policy.max;
cpufreq_set_policy(policy, &new_policy);
cpufreq_set_policy(policy, &new_policy);
}
}
EXPORT_SYMBOL(refresh_frequency_limits);
static void handle_update(struct work_struct *work)
{
@ -1130,60 +1122,27 @@ static void handle_update(struct work_struct *work)
container_of(work, struct cpufreq_policy, update);
pr_debug("handle_update for cpu %u called\n", policy->cpu);
down_write(&policy->rwsem);
refresh_frequency_limits(policy);
up_write(&policy->rwsem);
}
static struct cpufreq_policy *cpufreq_policy_alloc(unsigned int cpu)
static int cpufreq_notifier_min(struct notifier_block *nb, unsigned long freq,
void *data)
{
struct cpufreq_policy *policy;
int ret;
struct cpufreq_policy *policy = container_of(nb, struct cpufreq_policy, nb_min);
policy = kzalloc(sizeof(*policy), GFP_KERNEL);
if (!policy)
return NULL;
schedule_work(&policy->update);
return 0;
}
if (!alloc_cpumask_var(&policy->cpus, GFP_KERNEL))
goto err_free_policy;
static int cpufreq_notifier_max(struct notifier_block *nb, unsigned long freq,
void *data)
{
struct cpufreq_policy *policy = container_of(nb, struct cpufreq_policy, nb_max);
if (!zalloc_cpumask_var(&policy->related_cpus, GFP_KERNEL))
goto err_free_cpumask;
if (!zalloc_cpumask_var(&policy->real_cpus, GFP_KERNEL))
goto err_free_rcpumask;
ret = kobject_init_and_add(&policy->kobj, &ktype_cpufreq,
cpufreq_global_kobject, "policy%u", cpu);
if (ret) {
pr_err("%s: failed to init policy->kobj: %d\n", __func__, ret);
/*
* The entire policy object will be freed below, but the extra
* memory allocated for the kobject name needs to be freed by
* releasing the kobject.
*/
kobject_put(&policy->kobj);
goto err_free_real_cpus;
}
INIT_LIST_HEAD(&policy->policy_list);
init_rwsem(&policy->rwsem);
spin_lock_init(&policy->transition_lock);
init_waitqueue_head(&policy->transition_wait);
init_completion(&policy->kobj_unregister);
INIT_WORK(&policy->update, handle_update);
policy->cpu = cpu;
return policy;
err_free_real_cpus:
free_cpumask_var(policy->real_cpus);
err_free_rcpumask:
free_cpumask_var(policy->related_cpus);
err_free_cpumask:
free_cpumask_var(policy->cpus);
err_free_policy:
kfree(policy);
return NULL;
schedule_work(&policy->update);
return 0;
}
static void cpufreq_policy_put_kobj(struct cpufreq_policy *policy)
@ -1208,8 +1167,90 @@ static void cpufreq_policy_put_kobj(struct cpufreq_policy *policy)
pr_debug("wait complete\n");
}
static struct cpufreq_policy *cpufreq_policy_alloc(unsigned int cpu)
{
struct cpufreq_policy *policy;
struct device *dev = get_cpu_device(cpu);
int ret;
if (!dev)
return NULL;
policy = kzalloc(sizeof(*policy), GFP_KERNEL);
if (!policy)
return NULL;
if (!alloc_cpumask_var(&policy->cpus, GFP_KERNEL))
goto err_free_policy;
if (!zalloc_cpumask_var(&policy->related_cpus, GFP_KERNEL))
goto err_free_cpumask;
if (!zalloc_cpumask_var(&policy->real_cpus, GFP_KERNEL))
goto err_free_rcpumask;
ret = kobject_init_and_add(&policy->kobj, &ktype_cpufreq,
cpufreq_global_kobject, "policy%u", cpu);
if (ret) {
dev_err(dev, "%s: failed to init policy->kobj: %d\n", __func__, ret);
/*
* The entire policy object will be freed below, but the extra
* memory allocated for the kobject name needs to be freed by
* releasing the kobject.
*/
kobject_put(&policy->kobj);
goto err_free_real_cpus;
}
policy->nb_min.notifier_call = cpufreq_notifier_min;
policy->nb_max.notifier_call = cpufreq_notifier_max;
ret = dev_pm_qos_add_notifier(dev, &policy->nb_min,
DEV_PM_QOS_MIN_FREQUENCY);
if (ret) {
dev_err(dev, "Failed to register MIN QoS notifier: %d (%*pbl)\n",
ret, cpumask_pr_args(policy->cpus));
goto err_kobj_remove;
}
ret = dev_pm_qos_add_notifier(dev, &policy->nb_max,
DEV_PM_QOS_MAX_FREQUENCY);
if (ret) {
dev_err(dev, "Failed to register MAX QoS notifier: %d (%*pbl)\n",
ret, cpumask_pr_args(policy->cpus));
goto err_min_qos_notifier;
}
INIT_LIST_HEAD(&policy->policy_list);
init_rwsem(&policy->rwsem);
spin_lock_init(&policy->transition_lock);
init_waitqueue_head(&policy->transition_wait);
init_completion(&policy->kobj_unregister);
INIT_WORK(&policy->update, handle_update);
policy->cpu = cpu;
return policy;
err_min_qos_notifier:
dev_pm_qos_remove_notifier(dev, &policy->nb_min,
DEV_PM_QOS_MIN_FREQUENCY);
err_kobj_remove:
cpufreq_policy_put_kobj(policy);
err_free_real_cpus:
free_cpumask_var(policy->real_cpus);
err_free_rcpumask:
free_cpumask_var(policy->related_cpus);
err_free_cpumask:
free_cpumask_var(policy->cpus);
err_free_policy:
kfree(policy);
return NULL;
}
static void cpufreq_policy_free(struct cpufreq_policy *policy)
{
struct device *dev = get_cpu_device(policy->cpu);
unsigned long flags;
int cpu;
@ -1221,6 +1262,14 @@ static void cpufreq_policy_free(struct cpufreq_policy *policy)
per_cpu(cpufreq_cpu_data, cpu) = NULL;
write_unlock_irqrestore(&cpufreq_driver_lock, flags);
dev_pm_qos_remove_notifier(dev, &policy->nb_max,
DEV_PM_QOS_MAX_FREQUENCY);
dev_pm_qos_remove_notifier(dev, &policy->nb_min,
DEV_PM_QOS_MIN_FREQUENCY);
dev_pm_qos_remove_request(policy->max_freq_req);
dev_pm_qos_remove_request(policy->min_freq_req);
kfree(policy->min_freq_req);
cpufreq_policy_put_kobj(policy);
free_cpumask_var(policy->real_cpus);
free_cpumask_var(policy->related_cpus);
@ -1298,16 +1347,50 @@ static int cpufreq_online(unsigned int cpu)
cpumask_and(policy->cpus, policy->cpus, cpu_online_mask);
if (new_policy) {
policy->user_policy.min = policy->min;
policy->user_policy.max = policy->max;
struct device *dev = get_cpu_device(cpu);
for_each_cpu(j, policy->related_cpus) {
per_cpu(cpufreq_cpu_data, j) = policy;
add_cpu_dev_symlink(policy, j);
}
} else {
policy->min = policy->user_policy.min;
policy->max = policy->user_policy.max;
policy->min_freq_req = kzalloc(2 * sizeof(*policy->min_freq_req),
GFP_KERNEL);
if (!policy->min_freq_req)
goto out_destroy_policy;
ret = dev_pm_qos_add_request(dev, policy->min_freq_req,
DEV_PM_QOS_MIN_FREQUENCY,
policy->min);
if (ret < 0) {
/*
* So we don't call dev_pm_qos_remove_request() for an
* uninitialized request.
*/
kfree(policy->min_freq_req);
policy->min_freq_req = NULL;
dev_err(dev, "Failed to add min-freq constraint (%d)\n",
ret);
goto out_destroy_policy;
}
/*
* This must be initialized right here to avoid calling
* dev_pm_qos_remove_request() on uninitialized request in case
* of errors.
*/
policy->max_freq_req = policy->min_freq_req + 1;
ret = dev_pm_qos_add_request(dev, policy->max_freq_req,
DEV_PM_QOS_MAX_FREQUENCY,
policy->max);
if (ret < 0) {
policy->max_freq_req = NULL;
dev_err(dev, "Failed to add max-freq constraint (%d)\n",
ret);
goto out_destroy_policy;
}
}
if (cpufreq_driver->get && has_target()) {
@ -2280,6 +2363,7 @@ int cpufreq_set_policy(struct cpufreq_policy *policy,
struct cpufreq_policy *new_policy)
{
struct cpufreq_governor *old_gov;
struct device *cpu_dev = get_cpu_device(policy->cpu);
int ret;
pr_debug("setting new policy for CPU %u: %u - %u kHz\n",
@ -2288,17 +2372,21 @@ int cpufreq_set_policy(struct cpufreq_policy *policy,
memcpy(&new_policy->cpuinfo, &policy->cpuinfo, sizeof(policy->cpuinfo));
/*
* This check works well when we store new min/max freq attributes,
* because new_policy is a copy of policy with one field updated.
*/
if (new_policy->min > new_policy->max)
return -EINVAL;
* PM QoS framework collects all the requests from users and provide us
* the final aggregated value here.
*/
new_policy->min = dev_pm_qos_read_value(cpu_dev, DEV_PM_QOS_MIN_FREQUENCY);
new_policy->max = dev_pm_qos_read_value(cpu_dev, DEV_PM_QOS_MAX_FREQUENCY);
/* verify the cpu speed can be set within this limit */
ret = cpufreq_driver->verify(new_policy);
if (ret)
return ret;
/*
* The notifier-chain shall be removed once all the users of
* CPUFREQ_ADJUST are moved to use the QoS framework.
*/
/* adjust if necessary - all reasons */
blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
CPUFREQ_ADJUST, new_policy);
@ -2377,10 +2465,9 @@ int cpufreq_set_policy(struct cpufreq_policy *policy,
* @cpu: CPU to re-evaluate the policy for.
*
* Update the current frequency for the cpufreq policy of @cpu and use
* cpufreq_set_policy() to re-apply the min and max limits saved in the
* user_policy sub-structure of that policy, which triggers the evaluation
* of policy notifiers and the cpufreq driver's ->verify() callback for the
* policy in question, among other things.
* cpufreq_set_policy() to re-apply the min and max limits, which triggers the
* evaluation of policy notifiers and the cpufreq driver's ->verify() callback
* for the policy in question, among other things.
*/
void cpufreq_update_policy(unsigned int cpu)
{
@ -2440,10 +2527,9 @@ static int cpufreq_boost_set_sw(int state)
break;
}
down_write(&policy->rwsem);
policy->user_policy.max = policy->max;
cpufreq_governor_limits(policy);
up_write(&policy->rwsem);
ret = dev_pm_qos_update_request(policy->max_freq_req, policy->max);
if (ret)
break;
}
return ret;

3
drivers/cpufreq/davinci-cpufreq.c
View file

@ -90,7 +90,8 @@ static int davinci_cpu_init(struct cpufreq_policy *policy)
* Setting the latency to 2000 us to accommodate addition of drivers
* to pre/post change notification list.
*/
return cpufreq_generic_init(policy, freq_table, 2000 * 1000);
cpufreq_generic_init(policy, freq_table, 2000 * 1000);
return 0;
}
static struct cpufreq_driver davinci_driver = {

3
drivers/cpufreq/imx-cpufreq-dt.c
View file

@ -44,10 +44,11 @@ static int imx_cpufreq_dt_probe(struct platform_device *pdev)
* According to datasheet minimum speed grading is not supported for
* consumer parts so clamp to 1 to avoid warning for "no OPPs"
*
* Applies to 8mq and 8mm.
* Applies to i.MX8M series SoCs.
*/
if (mkt_segment == 0 && speed_grade == 0 && (
of_machine_is_compatible("fsl,imx8mm") ||
of_machine_is_compatible("fsl,imx8mn") ||
of_machine_is_compatible("fsl,imx8mq")))
speed_grade = 1;

6
drivers/cpufreq/imx6q-cpufreq.c
View file

@ -190,14 +190,12 @@ static int imx6q_set_target(struct cpufreq_policy *policy, unsigned int index)
static int imx6q_cpufreq_init(struct cpufreq_policy *policy)
{
int ret;
policy->clk = clks[ARM].clk;
ret = cpufreq_generic_init(policy, freq_table, transition_latency);
cpufreq_generic_init(policy, freq_table, transition_latency);
policy->suspend_freq = max_freq;
dev_pm_opp_of_register_em(policy->cpus);
return ret;
return 0;
}
static struct cpufreq_driver imx6q_cpufreq_driver = {

7
drivers/cpufreq/intel_pstate.c
View file

@ -898,7 +898,6 @@ static void intel_pstate_update_policies(void)
static void intel_pstate_update_max_freq(unsigned int cpu)
{
struct cpufreq_policy *policy = cpufreq_cpu_acquire(cpu);
struct cpufreq_policy new_policy;
struct cpudata *cpudata;
if (!policy)
@ -908,11 +907,7 @@ static void intel_pstate_update_max_freq(unsigned int cpu)
policy->cpuinfo.max_freq = global.turbo_disabled_mf ?
cpudata->pstate.max_freq : cpudata->pstate.turbo_freq;
memcpy(&new_policy, policy, sizeof(*policy));
new_policy.max = min(policy->user_policy.max, policy->cpuinfo.max_freq);
new_policy.min = min(policy->user_policy.min, new_policy.max);
cpufreq_set_policy(policy, &new_policy);
refresh_frequency_limits(policy);
cpufreq_cpu_release(policy);
}

3
drivers/cpufreq/kirkwood-cpufreq.c
View file

@ -85,7 +85,8 @@ static int kirkwood_cpufreq_target(struct cpufreq_policy *policy,
/* Module init and exit code */
static int kirkwood_cpufreq_cpu_init(struct cpufreq_policy *policy)
{
return cpufreq_generic_init(policy, kirkwood_freq_table, 5000);
cpufreq_generic_init(policy, kirkwood_freq_table, 5000);
return 0;
}
static struct cpufreq_driver kirkwood_cpufreq_driver = {

8
drivers/cpufreq/loongson1-cpufreq.c
View file

@ -81,7 +81,7 @@ static int ls1x_cpufreq_init(struct cpufreq_policy *policy)
struct device *cpu_dev = get_cpu_device(policy->cpu);
struct cpufreq_frequency_table *freq_tbl;
unsigned int pll_freq, freq;
int steps, i, ret;
int steps, i;
pll_freq = clk_get_rate(cpufreq->pll_clk) / 1000;
@ -103,11 +103,9 @@ static int ls1x_cpufreq_init(struct cpufreq_policy *policy)
freq_tbl[i].frequency = CPUFREQ_TABLE_END;
policy->clk = cpufreq->clk;
ret = cpufreq_generic_init(policy, freq_tbl, 0);
if (ret)
kfree(freq_tbl);
cpufreq_generic_init(policy, freq_tbl, 0);
return ret;
return 0;
}
static int ls1x_cpufreq_exit(struct cpufreq_policy *policy)

3
drivers/cpufreq/loongson2_cpufreq.c
View file

@ -95,7 +95,8 @@ static int loongson2_cpufreq_cpu_init(struct cpufreq_policy *policy)
}
policy->clk = cpuclk;
return cpufreq_generic_init(policy, &loongson2_clockmod_table[0], 0);
cpufreq_generic_init(policy, &loongson2_clockmod_table[0], 0);
return 0;
}
static int loongson2_cpufreq_exit(struct cpufreq_policy *policy)

3
drivers/cpufreq/maple-cpufreq.c
View file

@ -140,7 +140,8 @@ static unsigned int maple_cpufreq_get_speed(unsigned int cpu)
static int maple_cpufreq_cpu_init(struct cpufreq_policy *policy)
{
return cpufreq_generic_init(policy, maple_cpu_freqs, 12000);
cpufreq_generic_init(policy, maple_cpu_freqs, 12000);
return 0;
}
static struct cpufreq_driver maple_cpufreq_driver = {

15
drivers/cpufreq/omap-cpufreq.c
View file

@ -122,23 +122,18 @@ static int omap_cpu_init(struct cpufreq_policy *policy)
dev_err(mpu_dev,
"%s: cpu%d: failed creating freq table[%d]\n",
__func__, policy->cpu, result);
goto fail;
clk_put(policy->clk);
return result;
}
}
atomic_inc_return(&freq_table_users);
/* FIXME: what's the actual transition time? */
result = cpufreq_generic_init(policy, freq_table, 300 * 1000);
if (!result) {
dev_pm_opp_of_register_em(policy->cpus);
return 0;
}
cpufreq_generic_init(policy, freq_table, 300 * 1000);
dev_pm_opp_of_register_em(policy->cpus);
freq_table_free();
fail:
clk_put(policy->clk);
return result;
return 0;
}
static int omap_cpu_exit(struct cpufreq_policy *policy)

3
drivers/cpufreq/pasemi-cpufreq.c
View file

@ -196,7 +196,8 @@ static int pas_cpufreq_cpu_init(struct cpufreq_policy *policy)
policy->cur = pas_freqs[cur_astate].frequency;
ppc_proc_freq = policy->cur * 1000ul;
return cpufreq_generic_init(policy, pas_freqs, get_gizmo_latency());
cpufreq_generic_init(policy, pas_freqs, get_gizmo_latency());
return 0;
out_unmap_sdcpwr:
iounmap(sdcpwr_mapbase);

3
drivers/cpufreq/pmac32-cpufreq.c
View file

@ -372,7 +372,8 @@ static int pmac_cpufreq_target( struct cpufreq_policy *policy,
static int pmac_cpufreq_cpu_init(struct cpufreq_policy *policy)
{
return cpufreq_generic_init(policy, pmac_cpu_freqs, transition_latency);
cpufreq_generic_init(policy, pmac_cpu_freqs, transition_latency);
return 0;
}
static u32 read_gpio(struct device_node *np)

3
drivers/cpufreq/pmac64-cpufreq.c
View file

@ -321,7 +321,8 @@ static unsigned int g5_cpufreq_get_speed(unsigned int cpu)
static int g5_cpufreq_cpu_init(struct cpufreq_policy *policy)
{
return cpufreq_generic_init(policy, g5_cpu_freqs, transition_latency);
cpufreq_generic_init(policy, g5_cpu_freqs, transition_latency);
return 0;
}
static struct cpufreq_driver g5_cpufreq_driver = {

9
drivers/cpufreq/s3c2416-cpufreq.c
View file

@ -447,21 +447,16 @@ static int s3c2416_cpufreq_driver_init(struct cpufreq_policy *policy)
/* Datasheet says PLL stabalisation time must be at least 300us,
* so but add some fudge. (reference in LOCKCON0 register description)
*/
ret = cpufreq_generic_init(policy, s3c_freq->freq_table,
cpufreq_generic_init(policy, s3c_freq->freq_table,
(500 * 1000) + s3c_freq->regulator_latency);
if (ret)
goto err_freq_table;
register_reboot_notifier(&s3c2416_cpufreq_reboot_notifier);
return 0;
err_freq_table:
#ifdef CONFIG_ARM_S3C2416_CPUFREQ_VCORESCALE
regulator_put(s3c_freq->vddarm);
err_vddarm:
#endif
clk_put(s3c_freq->armclk);
#endif
err_armclk:
clk_put(s3c_freq->hclk);
err_hclk:

15
drivers/cpufreq/s3c64xx-cpufreq.c
View file

@ -144,7 +144,6 @@ out:
static int s3c64xx_cpufreq_driver_init(struct cpufreq_policy *policy)
{
int ret;
struct cpufreq_frequency_table *freq;
if (policy->cpu != 0)
@ -165,8 +164,7 @@ static int s3c64xx_cpufreq_driver_init(struct cpufreq_policy *policy)
#ifdef CONFIG_REGULATOR
vddarm = regulator_get(NULL, "vddarm");
if (IS_ERR(vddarm)) {
ret = PTR_ERR(vddarm);
pr_err("Failed to obtain VDDARM: %d\n", ret);
pr_err("Failed to obtain VDDARM: %ld\n", PTR_ERR(vddarm));
pr_err("Only frequency scaling available\n");
vddarm = NULL;
} else {
@ -196,16 +194,9 @@ static int s3c64xx_cpufreq_driver_init(struct cpufreq_policy *policy)
* the PLLs, which we don't currently) is ~300us worst case,
* but add some fudge.
*/
ret = cpufreq_generic_init(policy, s3c64xx_freq_table,
cpufreq_generic_init(policy, s3c64xx_freq_table,
(500 * 1000) + regulator_latency);
if (ret != 0) {
pr_err("Failed to configure frequency table: %d\n",
ret);
regulator_put(vddarm);
clk_put(policy->clk);
}
return ret;
return 0;
}
static struct cpufreq_driver s3c64xx_cpufreq_driver = {

3
drivers/cpufreq/s5pv210-cpufreq.c
View file

@ -541,7 +541,8 @@ static int s5pv210_cpu_init(struct cpufreq_policy *policy)
s5pv210_dram_conf[1].freq = clk_get_rate(dmc1_clk);
policy->suspend_freq = SLEEP_FREQ;
return cpufreq_generic_init(policy, s5pv210_freq_table, 40000);
cpufreq_generic_init(policy, s5pv210_freq_table, 40000);
return 0;
out_dmc1:
clk_put(dmc0_clk);

3
drivers/cpufreq/sa1100-cpufreq.c
View file

@ -181,7 +181,8 @@ static int sa1100_target(struct cpufreq_policy *policy, unsigned int ppcr)
static int __init sa1100_cpu_init(struct cpufreq_policy *policy)
{
return cpufreq_generic_init(policy, sa11x0_freq_table, 0);
cpufreq_generic_init(policy, sa11x0_freq_table, 0);
return 0;
}
static struct cpufreq_driver sa1100_driver __refdata = {

3
drivers/cpufreq/sa1110-cpufreq.c
View file

@ -303,7 +303,8 @@ static int sa1110_target(struct cpufreq_policy *policy, unsigned int ppcr)
static int __init sa1110_cpu_init(struct cpufreq_policy *policy)
{
return cpufreq_generic_init(policy, sa11x0_freq_table, 0);
cpufreq_generic_init(policy, sa11x0_freq_table, 0);
return 0;
}
/* sa1110_driver needs __refdata because it must remain after init registers

3
drivers/cpufreq/spear-cpufreq.c
View file

@ -153,8 +153,9 @@ static int spear_cpufreq_target(struct cpufreq_policy *policy,
static int spear_cpufreq_init(struct cpufreq_policy *policy)
{
policy->clk = spear_cpufreq.clk;
return cpufreq_generic_init(policy, spear_cpufreq.freq_tbl,
cpufreq_generic_init(policy, spear_cpufreq.freq_tbl,
spear_cpufreq.transition_latency);
return 0;
}
static struct cpufreq_driver spear_cpufreq_driver = {

8
drivers/cpufreq/tegra20-cpufreq.c
View file

@ -118,17 +118,11 @@ static int tegra_target(struct cpufreq_policy *policy, unsigned int index)
static int tegra_cpu_init(struct cpufreq_policy *policy)
{
struct tegra20_cpufreq *cpufreq = cpufreq_get_driver_data();
int ret;
clk_prepare_enable(cpufreq->cpu_clk);
/* FIXME: what's the actual transition time? */
ret = cpufreq_generic_init(policy, freq_table, 300 * 1000);
if (ret) {
clk_disable_unprepare(cpufreq->cpu_clk);
return ret;
}
cpufreq_generic_init(policy, freq_table, 300 * 1000);
policy->clk = cpufreq->cpu_clk;
policy->suspend_freq = freq_table[0].frequency;
return 0;