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PM / OPP: Add support for opp-suspend 

With "operating-points-v2" bindings, it's possible to specify the OPP to
which the device must be switched, before suspending.

This patch adds support for getting that information.

Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar 2015-06-13 15:10:21 +05:30 committed by Rafael J. Wysocki
parent 0644165861
commit ad656a6a8b
1 changed files with 11 additions and 0 deletions
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11
drivers/base/power/opp.c
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@ -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;