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PM: domains: add device managed version of dev_pm_domain_attach|detach_list()

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Add the devres-enabled version of dev_pm_domain_attach|detach_list.
If client drivers use devm_pm_domain_attach_list() to attach the PM domains,
devm_pm_domain_detach_list() will be invoked implicitly during remove phase.

Signed-off-by: Dikshita Agarwal <quic_dikshita@quicinc.com>
Link: https://lore.kernel.org/r/1724063350-11993-2-git-send-email-quic_dikshita@quicinc.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Dikshita Agarwal 2024-08-19 15:59:09 +05:30 committed by Ulf Hansson
parent cfee1b5077
commit b6cee6544d
2 changed files with 56 additions and 0 deletions
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45
drivers/base/power/common.c
View File

@ -276,6 +276,51 @@ err_attach:
}
EXPORT_SYMBOL_GPL(dev_pm_domain_attach_list);
/**
* devm_pm_domain_detach_list - devres-enabled version of dev_pm_domain_detach_list.
* @_list: The list of PM domains to detach.
*
* This function reverse the actions from devm_pm_domain_attach_list().
* it will be invoked during the remove phase from drivers implicitly if driver
* uses devm_pm_domain_attach_list() to attach the PM domains.
*/
static void devm_pm_domain_detach_list(void *_list)
{
struct dev_pm_domain_list *list = _list;
dev_pm_domain_detach_list(list);
}
/**
* devm_pm_domain_attach_list - devres-enabled version of dev_pm_domain_attach_list
* @dev: The device used to lookup the PM domains for.
* @data: The data used for attaching to the PM domains.
* @list: An out-parameter with an allocated list of attached PM domains.
*
* NOTE: this will also handle calling devm_pm_domain_detach_list() for
* you during remove phase.
*
* Returns the number of attached PM domains or a negative error code in case of
* a failure.
*/
int devm_pm_domain_attach_list(struct device *dev,
const struct dev_pm_domain_attach_data *data,
struct dev_pm_domain_list **list)
{
int ret, num_pds;
num_pds = dev_pm_domain_attach_list(dev, data, list);
if (num_pds <= 0)
return num_pds;
ret = devm_add_action_or_reset(dev, devm_pm_domain_detach_list, *list);
if (ret)
return ret;
return num_pds;
}
EXPORT_SYMBOL_GPL(devm_pm_domain_attach_list);
/**
* dev_pm_domain_detach - Detach a device from its PM domain.
* @dev: Device to detach.

11
include/linux/pm_domain.h
View File

@ -476,6 +476,9 @@ struct device *dev_pm_domain_attach_by_name(struct device *dev,
int dev_pm_domain_attach_list(struct device *dev,
const struct dev_pm_domain_attach_data *data,
struct dev_pm_domain_list **list);
int devm_pm_domain_attach_list(struct device *dev,
const struct dev_pm_domain_attach_data *data,
struct dev_pm_domain_list **list);
void dev_pm_domain_detach(struct device *dev, bool power_off);
void dev_pm_domain_detach_list(struct dev_pm_domain_list *list);
int dev_pm_domain_start(struct device *dev);
@ -502,6 +505,14 @@ static inline int dev_pm_domain_attach_list(struct device *dev,
{
return 0;
}
static inline int devm_pm_domain_attach_list(struct device *dev,
const struct dev_pm_domain_attach_data *data,
struct dev_pm_domain_list **list)
{
return 0;
}
static inline void dev_pm_domain_detach(struct device *dev, bool power_off) {}
static inline void dev_pm_domain_detach_list(struct dev_pm_domain_list *list) {}
static inline int dev_pm_domain_start(struct device *dev)