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PM / Domains: Don't expose generic_pm_domain structure to clients 

There should be no need to expose the generic_pm_domain structure to
clients and this eliminates the need to implement reference counting for
any external reference to a PM domain. Therefore, make the functions
pm_genpd_lookup_dev() and of_genpd_get_from_provider() private to the
PM domain core. The functions are renamed in accordance with the naming
conventions for genpd static functions.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Jon Hunter 2016-09-12 12:01:08 +01:00 committed by Rafael J. Wysocki
parent 3468c9d9ef
commit f58d4e5ab0
2 changed files with 9 additions and 24 deletions
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19
drivers/base/power/domain.c
View File

@ -45,7 +45,7 @@ static DEFINE_MUTEX(gpd_list_lock);
* and checks that the PM domain pointer is a real generic PM domain.
* Any failure results in NULL being returned.
*/
struct generic_pm_domain *pm_genpd_lookup_dev(struct device *dev)
static struct generic_pm_domain *genpd_lookup_dev(struct device *dev)
{
struct generic_pm_domain *genpd = NULL, *gpd;
@ -1119,7 +1119,7 @@ int pm_genpd_remove_device(struct generic_pm_domain *genpd,
dev_dbg(dev, "%s()\n", __func__);
if (!genpd || genpd != pm_genpd_lookup_dev(dev))
if (!genpd || genpd != genpd_lookup_dev(dev))
return -EINVAL;
/* The above validation also means we have existing domain_data. */
@ -1466,7 +1466,7 @@ void of_genpd_del_provider(struct device_node *np)
EXPORT_SYMBOL_GPL(of_genpd_del_provider);
/**
* of_genpd_get_from_provider() - Look-up PM domain
* genpd_get_from_provider() - Look-up PM domain
* @genpdspec: OF phandle args to use for look-up
*
* Looks for a PM domain provider under the node specified by @genpdspec and if
@ -1476,7 +1476,7 @@ EXPORT_SYMBOL_GPL(of_genpd_del_provider);
* Returns a valid pointer to struct generic_pm_domain on success or ERR_PTR()
* on failure.
*/
struct generic_pm_domain *of_genpd_get_from_provider(
static struct generic_pm_domain *genpd_get_from_provider(
struct of_phandle_args *genpdspec)
{
struct generic_pm_domain *genpd = ERR_PTR(-ENOENT);
@ -1499,7 +1499,6 @@ struct generic_pm_domain *of_genpd_get_from_provider(
return genpd;
}
EXPORT_SYMBOL_GPL(of_genpd_get_from_provider);
/**
* of_genpd_add_device() - Add a device to an I/O PM domain
@ -1513,7 +1512,7 @@ int of_genpd_add_device(struct of_phandle_args *genpdspec, struct device *dev)
{
struct generic_pm_domain *genpd;
genpd = of_genpd_get_from_provider(genpdspec);
genpd = genpd_get_from_provider(genpdspec);
if (IS_ERR(genpd))
return PTR_ERR(genpd);
@ -1535,11 +1534,11 @@ int of_genpd_add_subdomain(struct of_phandle_args *parent_spec,
{
struct generic_pm_domain *parent, *subdomain;
parent = of_genpd_get_from_provider(parent_spec);
parent = genpd_get_from_provider(parent_spec);
if (IS_ERR(parent))
return PTR_ERR(parent);
subdomain = of_genpd_get_from_provider(subdomain_spec);
subdomain = genpd_get_from_provider(subdomain_spec);
if (IS_ERR(subdomain))
return PTR_ERR(subdomain);
@ -1561,7 +1560,7 @@ static void genpd_dev_pm_detach(struct device *dev, bool power_off)
unsigned int i;
int ret = 0;
pd = pm_genpd_lookup_dev(dev);
pd = genpd_lookup_dev(dev);
if (!pd)
return;
@ -1642,7 +1641,7 @@ int genpd_dev_pm_attach(struct device *dev)
return -ENOENT;
}
pd = of_genpd_get_from_provider(&pd_args);
pd = genpd_get_from_provider(&pd_args);
of_node_put(pd_args.np);
if (IS_ERR(pd)) {
dev_dbg(dev, "%s() failed to find PM domain: %ld\n",

14
include/linux/pm_domain.h
View File

@ -116,7 +116,6 @@ static inline struct generic_pm_domain_data *dev_gpd_data(struct device *dev)
return to_gpd_data(dev->power.subsys_data->domain_data);
}
extern struct generic_pm_domain *pm_genpd_lookup_dev(struct device *dev);
extern int __pm_genpd_add_device(struct generic_pm_domain *genpd,
struct device *dev,
struct gpd_timing_data *td);
@ -138,10 +137,6 @@ static inline struct generic_pm_domain_data *dev_gpd_data(struct device *dev)
{
return ERR_PTR(-ENOSYS);
}
static inline struct generic_pm_domain *pm_genpd_lookup_dev(struct device *dev)
{
return NULL;
}
static inline int __pm_genpd_add_device(struct generic_pm_domain *genpd,
struct device *dev,
struct gpd_timing_data *td)
@ -199,9 +194,6 @@ typedef struct generic_pm_domain *(*genpd_xlate_t)(struct of_phandle_args *args,
int __of_genpd_add_provider(struct device_node *np, genpd_xlate_t xlate,
void *data);
void of_genpd_del_provider(struct device_node *np);
struct generic_pm_domain *of_genpd_get_from_provider(
struct of_phandle_args *genpdspec);
struct generic_pm_domain *__of_genpd_xlate_simple(
struct of_phandle_args *genpdspec,
void *data);
@ -222,12 +214,6 @@ static inline int __of_genpd_add_provider(struct device_node *np,
}
static inline void of_genpd_del_provider(struct device_node *np) {}
static inline struct generic_pm_domain *of_genpd_get_from_provider(
struct of_phandle_args *genpdspec)
{
return NULL;
}
#define __of_genpd_xlate_simple NULL
#define __of_genpd_xlate_onecell NULL