[PATCH V2 09/11] OPP: Add support for opp-suspend

Viresh Kumar
2015-07-27T05:02:39Z

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.

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 d6ab6af7e847..22b1e6ae7a94 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;
};

/*
@@ -909,6 +910,16 @@ 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