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authorUlf Hansson <ulf.hansson@linaro.org>2018-06-29 13:04:32 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2018-07-09 12:11:02 +0200
commit27dceb81f445c58b1d10d27d26eaf4ac2e9e0b00 (patch)
tree9f66e6b98015b5ebf2e1939029907e3286861151 /drivers/base
parent5d6be70add65e3f236642ab0029e356261617cd0 (diff)
PM / Domains: Introduce dev_pm_domain_attach_by_name()
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>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/power/common.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/base/power/common.c b/drivers/base/power/common.c
index df41b4780b3b..b413951c6abc 100644
--- a/drivers/base/power/common.c
+++ b/drivers/base/power/common.c
@@ -153,6 +153,23 @@ 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.
* @power_off: Used to indicate whether we should power off the device.