diff options
| -rw-r--r-- | drivers/base/power/domain.c | 32 | ||||
| -rw-r--r-- | include/linux/pm_domain.h | 12 |
2 files changed, 44 insertions, 0 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 978bbf7..939109b 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -1171,6 +1171,38 @@ int __pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev, } /** + * __pm_genpd_of_add_device - Add a device to an I/O PM domain. + * @genpd_node: Device tree node pointer representing a PM domain to which the + * the device is added to. + * @dev: Device to be added. + * @td: Set of PM QoS timing parameters to attach to the device. + */ +int __pm_genpd_of_add_device(struct device_node *genpd_node, struct device *dev, + struct gpd_timing_data *td) +{ + struct generic_pm_domain *genpd = NULL, *gpd; + + dev_dbg(dev, "%s()\n", __func__); + + if (IS_ERR_OR_NULL(genpd_node) || IS_ERR_OR_NULL(dev)) + return -EINVAL; + + mutex_lock(&gpd_list_lock); + list_for_each_entry(gpd, &gpd_list, gpd_list_node) { + if (gpd->of_node == genpd_node) { + genpd = gpd; + break; + } + } + mutex_unlock(&gpd_list_lock); + + if (!genpd) + return -EINVAL; + + return __pm_genpd_add_device(genpd, dev, td); +} + +/** * pm_genpd_remove_device - Remove a device from an I/O PM domain. * @genpd: PM domain to remove the device from. * @dev: Device to be removed. diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index a03a0ad..e3ff875 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -11,6 +11,7 @@ #include <linux/device.h> #include <linux/err.h> +#include <linux/of.h> enum gpd_status { GPD_STATE_ACTIVE = 0, /* PM domain is active */ @@ -70,6 +71,7 @@ struct generic_pm_domain { s64 break_even_ns; /* Power break even for the entire domain. */ s64 max_off_time_ns; /* Maximum allowed "suspended" time. */ ktime_t power_off_time; + struct device_node *of_node; /* Node in device tree */ }; static inline struct generic_pm_domain *pd_to_genpd(struct dev_pm_domain *pd) @@ -117,12 +119,22 @@ extern int __pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev, struct gpd_timing_data *td); +extern int __pm_genpd_of_add_device(struct device_node *genpd_node, + struct device *dev, + struct gpd_timing_data *td); + static inline int pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev) { return __pm_genpd_add_device(genpd, dev, NULL); } +static inline int pm_genpd_of_add_device(struct device_node *genpd_node, + struct device *dev) +{ + return __pm_genpd_of_add_device(genpd_node, dev, NULL); +} + extern int pm_genpd_remove_device(struct generic_pm_domain *genpd, struct device *dev); extern int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, |