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path: root/drivers/opp/of.c
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2018-05-30OPP: Allow same OPP table to be used for multiple genpdViresh Kumar1-2/+15
The OPP binding says: Property: operating-points-v2 ... This can contain more than one phandle for power domain providers that provide multiple power domains. That is, one phandle for each power domain. If only one phandle is available, then the same OPP table will be used for all power domains provided by the power domain provider. But the OPP core isn't allowing the same OPP table to be used for multiple domains. Update dev_pm_opp_of_add_table_indexed() to allow that. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Rajendra Nayak <rnayak@codeaurora.org>
2018-05-16PM / OPP: silence an uninitialized variable warningDan Carpenter1-1/+1
Smatch complains that it's possible we print "rate" in the debug output when it hasn't been initialized. It should be zero on that path. Fixes: a1e8c13600bf ("PM / OPP: "opp-hz" is optional for power domains") [ Viresh: Added the Fixes tag ] Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2018-05-09PM / OPP: Get performance state using genpd helperViresh Kumar1-1/+19
The genpd core provides an API now to retrieve the performance state from DT, use that instead of the ->get_pstate() callback. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
2018-05-09PM / OPP: Implement dev_pm_opp_get_of_node()Viresh Kumar1-0/+19
This adds a new helper to let the power domain drivers to access opp->np, so that they can read platform specific properties from the node. Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
2018-05-09PM / OPP: Implement of_dev_pm_opp_find_required_opp()Viresh Kumar1-0/+54
A device's DT node or its OPP nodes can contain a phandle to other device's OPP node, in the "required-opps" property. This patch implements a routine to find that required OPP from the node that contains the "required-opps" property. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
2018-05-09PM / OPP: Implement dev_pm_opp_of_add_table_indexed()Viresh Kumar1-9/+41
The "operating-points-v2" property can contain a list of phandles now, specifically for the power domain providers that provide multiple domains. Add support to parse that. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
2018-05-09PM / OPP: "opp-hz" is optional for power domainsViresh Kumar1-9/+17
"opp-hz" property is optional for power domains now and we shouldn't error out if it is missing for power domains. This patch creates two new routines, _get_opp_count() and _opp_is_duplicate(), by separating existing code from their parent functions. Also skip duplicate OPP check for power domain OPPs as they may not have any the "opp-hz" field, but a platform specific performance state binding to uniquely identify OPP nodes. By default the debugfs OPP nodes are named using the "rate" value, but that isn't possible for the power domain OPP nodes and hence they use the index of the OPP node in the OPP node list instead. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-10-14PM / OPP: add missing of_node_put() for of_get_cpu_node()Sudeep Holla1-2/+3
Commit 762792913f8c (PM / OPP: Fix get sharing CPUs when hotplug is used) moved away from using cpu_dev->of_node because of some limitations. However, commit 7467c9d95989 (of: return of_get_cpu_node from of_cpu_device_node_get if CPUs are not registered) added support to fall back to of_get_cpu_node() if called if CPUs are not registered yet. Add the missing of_node_put() for the CPU device nodes. Also go back to using of_cpu_device_node_get() in dev_pm_opp_of_get_sharing_cpus() to avoid scanning the device tree again. Acked-by: Viresh Kumar <vireshk@kernel.org> Fixes: 762792913f8c (PM / OPP: Fix get sharing CPUs when hotplug is used) Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-10-11PM / OPP: Add missing of_node_put(np)Tobias Jordan1-0/+1
The for_each_available_child_of_node() loop in _of_add_opp_table_v2() doesn't drop the reference to "np" on errors. Fix that. Fixes: 274659029c9d (PM / OPP: Add support to parse "operating-points-v2" bindings) Cc: 4.3+ <stable@vger.kernel.org> # 4.3+ Signed-off-by: Tobias Jordan <Tobias.Jordan@elektrobit.com> [ VK: Improved commit log. ] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-10-03PM / OPP: Move the OPP directory out of power/Viresh Kumar1-0/+633
The drivers/base/power/ directory is special and contains code related to power management core like system suspend/resume, hibernation, etc. It was fine to keep the OPP code inside it when we had just one file for it, but it is growing now and already has a directory for itself. Lets move it directly under drivers/ directory, just like cpufreq and cpuidle. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>