[PATCH v5 13/15] PM / Domains: Introduce a genpd OF helper that removes a subdomain
From: Ulf Hansson <hidden>
Date: 2019-12-30 14:44:32
Also in:
linux-arm-msm, linux-pm
Subsystem:
driver core, kobjects, debugfs and sysfs, generic pm domains, hibernation (aka software suspend, aka swsusp), power management core, suspend to ram, the rest · Maintainers:
Greg Kroah-Hartman, "Rafael J. Wysocki", Danilo Krummrich, Ulf Hansson, Linus Torvalds
We already have the of_genpd_add_subdomain() helper, but no corresponding of_genpd_remove_subdomain(), so let's add it. Subsequent changes starts to make use of it. Signed-off-by: Ulf Hansson <redacted> --- Changes in v5: - New patch. --- drivers/base/power/domain.c | 38 +++++++++++++++++++++++++++++++++++++ include/linux/pm_domain.h | 8 ++++++++ 2 files changed, 46 insertions(+)
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 8e5725b11ee8..959d6d5eb000 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c@@ -2302,6 +2302,44 @@ int of_genpd_add_subdomain(struct of_phandle_args *parent_spec, } EXPORT_SYMBOL_GPL(of_genpd_add_subdomain); +/** + * of_genpd_remove_subdomain - Remove a subdomain from an I/O PM domain. + * @parent_spec: OF phandle args to use for parent PM domain look-up + * @subdomain_spec: OF phandle args to use for subdomain look-up + * + * Looks-up a parent PM domain and subdomain based upon phandle args + * provided and removes the subdomain from the parent PM domain. Returns a + * negative error code on failure. + */ +int of_genpd_remove_subdomain(struct of_phandle_args *parent_spec, + struct of_phandle_args *subdomain_spec) +{ + struct generic_pm_domain *parent, *subdomain; + int ret; + + mutex_lock(&gpd_list_lock); + + parent = genpd_get_from_provider(parent_spec); + if (IS_ERR(parent)) { + ret = PTR_ERR(parent); + goto out; + } + + subdomain = genpd_get_from_provider(subdomain_spec); + if (IS_ERR(subdomain)) { + ret = PTR_ERR(subdomain); + goto out; + } + + ret = pm_genpd_remove_subdomain(parent, subdomain); + +out: + mutex_unlock(&gpd_list_lock); + + return ret; +} +EXPORT_SYMBOL_GPL(of_genpd_remove_subdomain); + /** * of_genpd_remove_last - Remove the last PM domain registered for a provider * @provider: Pointer to device structure associated with provider
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index 5a31c711b896..9ec78ee53652 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h@@ -284,6 +284,8 @@ void of_genpd_del_provider(struct device_node *np); int of_genpd_add_device(struct of_phandle_args *args, struct device *dev); int of_genpd_add_subdomain(struct of_phandle_args *parent_spec, struct of_phandle_args *subdomain_spec); +int of_genpd_remove_subdomain(struct of_phandle_args *parent_spec, + struct of_phandle_args *subdomain_spec); struct generic_pm_domain *of_genpd_remove_last(struct device_node *np); int of_genpd_parse_idle_states(struct device_node *dn, struct genpd_power_state **states, int *n);
@@ -322,6 +324,12 @@ static inline int of_genpd_add_subdomain(struct of_phandle_args *parent_spec, return -ENODEV; } +static inline int of_genpd_remove_subdomain(struct of_phandle_args *parent_spec, + struct of_phandle_args *subdomain_spec) +{ + return -ENODEV; +} + static inline int of_genpd_parse_idle_states(struct device_node *dn, struct genpd_power_state **states, int *n) {
--
2.17.1
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