[PATCH v8 08/10] PM / Domains: Add a simple_opp_to_performance_state() helper
From: Rajendra Nayak <hidden>
Date: 2018-12-21 08:57:11
Also in:
linux-arm-msm, lkml
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
Now that we have atleast 2 genpd providers, both using a simple routine to read a performance state value from device tree and return it, in order to implement the .opp_to_performance_state callback, add a simple_opp_to_performance_state() helper to do it, so it can be resued across all such genpd providers which just need to read the value from DT. Suggested-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Rajendra Nayak <redacted> Reviewed-by: Stephen Boyd <redacted> --- drivers/base/power/domain.c | 17 +++++++++++++++++ include/linux/pm_domain.h | 9 +++++++++ 2 files changed, 26 insertions(+)
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 8e554e6a82a2..193872afbe20 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c@@ -2520,6 +2520,23 @@ int of_genpd_parse_idle_states(struct device_node *dn, } EXPORT_SYMBOL_GPL(of_genpd_parse_idle_states); +unsigned int simple_opp_to_performance_state(struct generic_pm_domain *genpd, + struct dev_pm_opp *opp, + const char *name) +{ + struct device_node *np; + unsigned int perf_state = 0; + + np = dev_pm_opp_get_of_node(opp); + if (of_property_read_u32(np, name, &perf_state)) + pr_err("%s: missing %s property\n", __func__, name); + + of_node_put(np); + + return perf_state; +} +EXPORT_SYMBOL_GPL(simple_opp_to_performance_state); + /** * pm_genpd_opp_to_performance_state - Gets performance state of the genpd from its OPP node. *
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index 642036952553..7e5777b081ee 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h@@ -260,6 +260,9 @@ int of_genpd_parse_idle_states(struct device_node *dn, struct genpd_power_state **states, int *n); unsigned int pm_genpd_opp_to_performance_state(struct device *genpd_dev, struct dev_pm_opp *opp); +unsigned int simple_opp_to_performance_state(struct generic_pm_domain *genpd, + struct dev_pm_opp *opp, + const char *name); int genpd_dev_pm_attach(struct device *dev); struct device *genpd_dev_pm_attach_by_id(struct device *dev,
@@ -306,6 +309,12 @@ pm_genpd_opp_to_performance_state(struct device *genpd_dev, return 0; } +unsigned int simple_opp_to_performance_state(struct generic_pm_domain *genpd, + struct dev_pm_opp *opp, + const char *name) +{ + return 0; +} static inline int genpd_dev_pm_attach(struct device *dev) { return 0;
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