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PM / Domains: Introduce dev_pm_domain_attach_by_name()

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For the multiple PM domain case, let's introduce a new API called
dev_pm_domain_attach_by_name(). This allows a consumer driver to associate
its device with one of its PM domains, by using a name based lookup.

Do note that, currently it's only genpd that supports multiple PM domains
per device, but dev_pm_domain_attach_by_name() can easily by extended to
cover other PM domain types, if/when needed.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Rajendra Nayak <rnayak@codeaurora.org>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Ulf Hansson
2018-06-29 13:04:32 +02:00
committed by Rafael J. Wysocki
parent 5d6be70add
commit 27dceb81f4
2 changed files with 24 additions and 0 deletions
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17
drivers/base/power/common.c
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@@ -152,6 +152,23 @@ struct device *dev_pm_domain_attach_by_id(struct device *dev,
}
EXPORT_SYMBOL_GPL(dev_pm_domain_attach_by_id);
/**
* dev_pm_domain_attach_by_name - Associate a device with one of its PM domains.
* @dev: The device used to lookup the PM domain.
* @name: The name of the PM domain.
*
* For a detailed function description, see dev_pm_domain_attach_by_id().
*/
struct device *dev_pm_domain_attach_by_name(struct device *dev,
char *name)
{
if (dev->pm_domain)
return ERR_PTR(-EEXIST);
return genpd_dev_pm_attach_by_name(dev, name);
}
EXPORT_SYMBOL_GPL(dev_pm_domain_attach_by_name);
/**
* dev_pm_domain_detach - Detach a device from its PM domain.
* @dev: Device to detach.