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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>
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@ -133,6 +133,7 @@ struct device_opp {
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struct device_node *np;
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unsigned long clock_latency_ns_max;
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bool shared_opp;
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struct dev_pm_opp *suspend_opp;
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};
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/*
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@ -923,6 +924,16 @@ static int _opp_add_static_v2(struct device *dev, struct device_node *np)
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if (ret)
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goto free_opp;
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/* OPP to select on device suspend */
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if (of_property_read_bool(np, "opp-suspend")) {
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if (dev_opp->suspend_opp)
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dev_warn(dev, "%s: Multiple suspend OPPs found (%lu %lu)\n",
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__func__, dev_opp->suspend_opp->rate,
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new_opp->rate);
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else
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dev_opp->suspend_opp = new_opp;
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}
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if (new_opp->clock_latency_ns > dev_opp->clock_latency_ns_max)
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dev_opp->clock_latency_ns_max = new_opp->clock_latency_ns;
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