[PATCH V3 10/16] PM / OPP: Add support for opp-suspend
From: viresh.kumar@linaro.org (Viresh Kumar)
Date: 2015-07-29 10:54:29
Also in:
linux-pm, lkml
Subsystem:
driver core, kobjects, debugfs and sysfs, hibernation (aka software suspend, aka swsusp), power management core, suspend to ram, the rest · Maintainers:
Greg Kroah-Hartman, "Rafael J. Wysocki", Danilo Krummrich, Linus Torvalds
With "operating-points-v2" bindings, its possible to specify the OPP to which the device must be switched, before suspending. This patch adds support for getting that information. Reviewed-by: Bartlomiej Zolnierkiewicz <redacted> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> --- drivers/base/power/opp.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c
index 5d699e3ec136..0ebcea49145a 100644
--- a/drivers/base/power/opp.c
+++ b/drivers/base/power/opp.c@@ -133,6 +133,7 @@ struct device_opp { struct device_node *np; unsigned long clock_latency_ns_max; bool shared_opp; + struct dev_pm_opp *suspend_opp; }; /*
@@ -923,6 +924,16 @@ static int _opp_add_static_v2(struct device *dev, struct device_node *np) if (ret) goto free_opp; + /* OPP to select on device suspend */ + if (of_property_read_bool(np, "opp-suspend")) { + if (dev_opp->suspend_opp) + dev_warn(dev, "%s: Multiple suspend OPPs found (%lu %lu)\n", + __func__, dev_opp->suspend_opp->rate, + new_opp->rate); + else + dev_opp->suspend_opp = new_opp; + } + if (new_opp->clock_latency_ns > dev_opp->clock_latency_ns_max) dev_opp->clock_latency_ns_max = new_opp->clock_latency_ns;
--
2.4.0