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* opp: Change return type of devm_pm_opp_attach_genpd()Dmitry Osipenko2021-03-161-4/+5
| | | | | | | | | Make devm_pm_opp_attach_genpd() to return error code instead of opp_table pointer in order to have return type consistent with the other resource-managed OPP helpers. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* opp: Change return type of devm_pm_opp_register_set_opp_helper()Dmitry Osipenko2021-03-161-4/+3
| | | | | | | | | Make devm_pm_opp_register_set_opp_helper() to return error code instead of opp_table pointer in order to have return type consistent with the other resource-managed OPP helpers. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* opp: Add devres wrapper for dev_pm_opp_of_add_tableYangtao Li2021-03-151-0/+6
| | | | | | | | | Add devres wrapper for dev_pm_opp_of_add_table() to simplify drivers code. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* opp: Add devres wrapper for dev_pm_opp_set_supported_hwYangtao Li2021-03-151-0/+8
| | | | | | | | | Add devres wrapper for dev_pm_opp_set_supported_hw() to simplify drivers code. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* opp: Add devres wrapper for dev_pm_opp_set_regulatorsYangtao Li2021-03-151-0/+8
| | | | | | | | | Add devres wrapper for dev_pm_opp_set_regulators() to simplify drivers code. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* opp: Add devres wrapper for dev_pm_opp_set_clknameYangtao Li2021-03-151-0/+6
| | | | | | | | Add devres wrapper for dev_pm_opp_set_clkname() to simplify drivers code. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* OPP: Add function to look up required OPP's for a given OPPSaravana Kannan2021-02-041-0/+7
| | | | | | | | | | Add a function that allows looking up required OPPs given a source OPP table, destination OPP table and the source OPP. Signed-off-by: Saravana Kannan <saravanak@google.com> Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org> [ Viresh: Rearranged code, fixed return errors ] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* opp: Replace ENOTSUPP with EOPNOTSUPPViresh Kumar2021-02-021-32/+32
| | | | | | | | | | Checkpatch gives following warning for new patches, and the new patches normally follow the existing standards for such stuff. Lets fix it properly. WARNING: ENOTSUPP is not a SUSV4 error code, prefer EOPNOTSUPP. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* opp: Fix "foo * bar" should be "foo *bar"Viresh Kumar2021-02-021-2/+2
| | | | | | | | Fix checkpatch warning: ERROR: "foo * bar" should be "foo *bar". Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* opp: Remove dev_pm_opp_set_bw()Viresh Kumar2021-02-021-6/+0
| | | | | | | | | | All the users have migrated to dev_pm_opp_set_opp() now, get rid of the duplicate API, dev_pm_opp_set_bw(), which only performs a part of the new API. While at it, remove the unnecessary parameter to _set_opp_bw(). Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Dmitry Osipenko <digetx@gmail.com>
* opp: Implement dev_pm_opp_set_opp()Viresh Kumar2021-02-021-0/+6
| | | | | | | | | | The new helper dev_pm_opp_set_opp() can be used for configuring the devices for a particular OPP and can be used by different type of devices, even the ones which don't change frequency (like power domains). Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Dmitry Osipenko <digetx@gmail.com>
* opp: Add devm_pm_opp_attach_genpdDmitry Osipenko2021-02-021-0/+7
| | | | | | | | Add resource-managed version of dev_pm_opp_attach_genpd(). Signed-off-by: Dmitry Osipenko <digetx@gmail.com> [ Viresh: Manually apply the patch and relocate the routines ] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* opp: Add devm_pm_opp_register_set_opp_helperDmitry Osipenko2021-02-021-0/+8
| | | | | | | | | | | Add resource-managed version of dev_pm_opp_register_set_opp_helper(). Tested-by: Peter Geis <pgwipeout@gmail.com> Tested-by: Nicolas Chauvet <kwizart@gmail.com> Tested-by: Matt Merhar <mattmerhar@protonmail.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> [ Viresh: Manually apply the patch and relocate the routines ] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* opp: Add dev_pm_opp_of_add_table_noclk()Viresh Kumar2021-02-021-0/+6
| | | | | | | | A few drivers have device's clk but they don't want the OPP core to handle that. Add a new helper for them, dev_pm_opp_of_add_table_noclk(). Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Dmitry Osipenko <digetx@gmail.com>
* opp: Add dev_pm_opp_sync_regulators()Dmitry Osipenko2021-02-021-0/+6
| | | | | | | | | | | | Extend OPP API with dev_pm_opp_sync_regulators() function, which syncs voltage state of regulators. Tested-by: Peter Geis <pgwipeout@gmail.com> Tested-by: Nicolas Chauvet <kwizart@gmail.com> Tested-by: Matt Merhar <mattmerhar@protonmail.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> [ Viresh: Added unlikely() ] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* opp: Add dev_pm_opp_get_required_pstate()Dmitry Osipenko2021-02-021-0/+10
| | | | | | | | | | | Add dev_pm_opp_get_required_pstate() which allows OPP users to retrieve required performance state of a given OPP. Tested-by: Peter Geis <pgwipeout@gmail.com> Tested-by: Nicolas Chauvet <kwizart@gmail.com> Tested-by: Matt Merhar <mattmerhar@protonmail.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* opp: Add dev_pm_opp_find_level_ceil()Dmitry Osipenko2021-02-021-0/+8
| | | | | | | | | | | | Add a ceil version of the dev_pm_opp_find_level(). It's handy to have if levels don't start from 0 in OPP table and zero usually means a minimal level. Tested-by: Peter Geis <pgwipeout@gmail.com> Tested-by: Nicolas Chauvet <kwizart@gmail.com> Tested-by: Matt Merhar <mattmerhar@protonmail.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* opp: Don't create an OPP table from dev_pm_opp_get_opp_table()Viresh Kumar2020-12-091-1/+0
| | | | | | | | | | | | | | | | | | | | | It has been found that some users (like cpufreq-dt and others on LKML) have abused the helper dev_pm_opp_get_opp_table() to create the OPP table instead of just finding it, which is the wrong thing to do. This routine was meant for OPP core's internal working and exposed the whole functionality by mistake. Change the scope of dev_pm_opp_get_opp_table() to only finding the table. The internal helpers _opp_get_opp_table*() are thus renamed to _add_opp_table*(), dev_pm_opp_get_opp_table_indexed() is removed (as we don't need the index field for finding the OPP table) and so the only user, genpd, is updated. Note that the prototype of _add_opp_table() was already left in opp.h by mistake when it was removed earlier and so we weren't required to add it now. Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* Merge branch 'cpufreq/arm/linux-next' of ↵Rafael J. Wysocki2020-08-041-0/+6
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm Pull ARM cpufreq driver changes for v5.9-rc1 from Viresh Kumar: "Here are the details: - Adaptive voltage scaling (AVS) support and minor cleanups for brcmstb driver (Florian Fainelli and Markus Mayer). - A new tegra driver and cleanup for the existing one (Sumit Gupta and Jon Hunter). - Bandwidth level support for Qcom driver along with OPP changes (Sibi Sankar). - Cleanups to sti, cpufreq-dt, ap806, CPPC drivers (Viresh Kumar, Lee Jones, Ivan Kokshaysky, Sven Auhagen, and Xin Hao). - Make schedutil default governor for ARM (Valentin Schneider). - Fix dependency issues for imx (Walter Lozano). - Cleanup around cached_resolved_idx in cpufreq core (Viresh Kumar)." * 'cpufreq/arm/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm: cpufreq: make schedutil the default for arm and arm64 cpufreq: cached_resolved_idx can not be negative cpufreq: Add Tegra194 cpufreq driver dt-bindings: arm: Add NVIDIA Tegra194 CPU Complex binding cpufreq: imx: Select NVMEM_IMX_OCOTP cpufreq: sti-cpufreq: Fix some formatting and misspelling issues cpufreq: tegra186: Simplify probe return path cpufreq: CPPC: Reuse caps variable in few routines cpufreq: ap806: fix cpufreq driver needs ap cpu clk cpufreq: cppc: Reorder code and remove apply_hisi_workaround variable cpufreq: dt: fix oops on armada37xx cpufreq: brcmstb-avs-cpufreq: send S2_ENTER / S2_EXIT commands to AVS cpufreq: brcmstb-avs-cpufreq: Support polling AVS firmware cpufreq: brcmstb-avs-cpufreq: more flexible interface for __issue_avs_command() cpufreq: qcom: Disable fast switch when scaling DDR/L3 cpufreq: qcom: Update the bandwidth levels on frequency change OPP: Add and export helper to set bandwidth cpufreq: blacklist SC7180 in cpufreq-dt-platdev cpufreq: blacklist SDM845 in cpufreq-dt-platdev
| * OPP: Add and export helper to set bandwidthSibi Sankar2020-07-301-0/+6
| | | | | | | | | | | | | | | | Add and export 'dev_pm_opp_set_bw' to set the bandwidth levels associated with an OPP. Signed-off-by: Sibi Sankar <sibis@codeaurora.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* | OPP: refactor dev_pm_opp_of_register_em() and update related driversLukasz Luba2020-06-241-2/+13
|/ | | | | | | | | | | The Energy Model framework supports not only CPU devices. Drop the CPU specific interface with cpumask and add struct device. Add also a return value, user might use it. This new interface provides easy way to create a simple Energy Model, which then might be used by e.g. thermal subsystem. Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Lukasz Luba <lukasz.luba@arm.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* opp: Add support for parsing interconnect bandwidthGeorgi Djakov2020-05-291-0/+18
| | | | | | | | | | | | | The OPP bindings now support bandwidth values, so add support to parse it from device tree and store it into the new dev_pm_opp_icc_bw struct, which is part of the dev_pm_opp. Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org> Reviewed-by: Matthias Kaehlcke <mka@chromium.org> [ Viresh: Create _read_bw() and use it, renamed _of_find_icc_paths() to dev_pm_opp_of_find_icc_paths(), exported it and made opp_table argument optional. Also drop the depends on from Kconfig. ] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* PM / OPP: Support adjusting OPP voltages at runtimeStephen Boyd2019-11-111-0/+13
| | | | | | | | | | | | | | | | | | | | | | | | On some SoCs the Adaptive Voltage Scaling (AVS) technique is employed to optimize the operating voltage of a device. At a given frequency, the hardware monitors dynamic factors and either makes a suggestion for how much to adjust a voltage for the current frequency, or it automatically adjusts the voltage without software intervention. Add an API to the OPP library for the former case, so that AVS type devices can update the voltages for an OPP when the hardware determines the voltage should change. The assumption is that drivers like CPUfreq or devfreq will register for the OPP notifiers and adjust the voltage according to suggestions that AVS makes. This patch is derived from [1] submitted by Stephen. [1] https://lore.kernel.org/patchwork/patch/599279/ Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> [Roger Lu: Changed to rcu less implementation] Signed-off-by: Roger Lu <roger.lu@mediatek.com> [s.nawrocki@samsung.com: added handling of OPP min/max voltage] Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* opp: Add dev_pm_opp_find_level_exact()Niklas Cassel2019-07-261-0/+8
| | | | | | | | | Since the performance states in the OPP table are unique, implement a dev_pm_opp_find_level_exact() in order to be able to fetch a specific OPP. Signed-off-by: Niklas Cassel <niklas.cassel@linaro.org> [ Viresh: Updated commit log ] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* opp: Return genpd virtual devices from dev_pm_opp_attach_genpd()Viresh Kumar2019-07-261-2/+2
| | | | | | | | | | | | | | | The cpufreq drivers don't need to do runtime PM operations on the virtual devices returned by dev_pm_domain_attach_by_name() and so the virtual devices weren't shared with the callers of dev_pm_opp_attach_genpd() earlier. But the IO device drivers would want to do that. This patch updates the prototype of dev_pm_opp_attach_genpd() to accept another argument to return the pointer to the array of genpd virtual devices. Reported-by: Rajendra Nayak <rnayak@codeaurora.org> Tested-by: Rajendra Nayak <rnayak@codeaurora.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* Merge branch 'opp/linux-next' of ↵Rafael J. Wysocki2019-06-261-4/+4
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm Pull operating performance points (OPP) framework changes for v5.3 from Viresh Kumar: "This pull request contains: - OPP core changes to support a wider range of devices, like IO devices (Rajendra Nayak and Stehpen Boyd). - Fixes around genpd_virt_devs (Viresh Kumar). - Fix for platform with set_opp() callback (Dmitry Osipenko)." * 'opp/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm: opp: Don't use IS_ERR on invalid supplies opp: Make dev_pm_opp_set_rate() handle freq = 0 to drop performance votes opp: Don't overwrite rounded clk rate opp: Allocate genpd_virt_devs from dev_pm_opp_attach_genpd() opp: Attach genpds to devices from within OPP core
| * opp: Attach genpds to devices from within OPP coreViresh Kumar2019-05-201-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The OPP core requires the virtual device pointers to set performance state on behalf of the device, for the multiple power domain case. The genpd API (dev_pm_domain_attach_by_name()) has evolved now to support even the single power domain case and that lets us add common code for handling both the cases more efficiently. The virtual device structure returned by dev_pm_domain_attach_by_name() isn't normally used by the cpufreq drivers as they don't manage power on/off of the domains and so is only useful for the OPP core. This patch moves all the complexity into the OPP core to make the end drivers simple. The earlier APIs dev_pm_opp_{set|put}_genpd_virt_dev() are reworked into dev_pm_opp_{attach|detach}_genpd(). The new helper dev_pm_opp_attach_genpd() accepts a NULL terminated array of strings which contains names of all the genpd's to attach. It then attaches all the domains and saves the pointers to the virtual devices. The other helper undo the work done by this helper. Tested-by: Niklas Cassel <niklas.cassel@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* | treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500Thomas Gleixner2019-06-191-4/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | | | Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* OPP: Introduce dev_pm_opp_find_freq_ceil_by_volt()Andrew-sh.Cheng2019-04-101-0/+8
| | | | | | | | | | | This patch introduces a new helper routine in the OPP core, which returns the OPP with the highest frequency which has voltage less than or equal to the target voltage passed to the helper. Signed-off-by: Andrew-sh.Cheng <andrew-sh.cheng@mediatek.com> [ Viresh: Massaged the commit log and renamed the helper with some cleanups. ] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* Merge tag 'pm-5.1-rc1' of ↵Linus Torvalds2019-03-061-0/+6
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management updates from Rafael Wysocki: "These are PM-runtime framework changes to use ktime instead of jiffies for accounting, new PM core flag to mark devices that don't need any form of power management, cpuidle updates including driver API documentation and a new governor, cpufreq updates including a new driver for Armada 8K, thermal cleanups and more, some energy-aware scheduling (EAS) enabling changes, new chips support in the intel_idle and RAPL drivers and assorted cleanups in some other places. Specifics: - Update the PM-runtime framework to use ktime instead of jiffies for accounting (Thara Gopinath, Vincent Guittot) - Optimize the autosuspend code in the PM-runtime framework somewhat (Ladislav Michl) - Add a PM core flag to mark devices that don't need any form of power management (Sudeep Holla) - Introduce driver API documentation for cpuidle and add a new cpuidle governor for tickless systems (Rafael Wysocki) - Add Jacobsville support to the intel_idle driver (Zhang Rui) - Clean up a cpuidle core header file and the cpuidle-dt and ACPI processor-idle drivers (Yangtao Li, Joseph Lo, Yazen Ghannam) - Add new cpufreq driver for Armada 8K (Gregory Clement) - Fix and clean up cpufreq core (Rafael Wysocki, Viresh Kumar, Amit Kucheria) - Add support for light-weight tear-down and bring-up of CPUs to the cpufreq core and use it in the cpufreq-dt driver (Viresh Kumar) - Fix cpu_cooling Kconfig dependencies, add support for CPU cooling auto-registration to the cpufreq core and use it in multiple cpufreq drivers (Amit Kucheria) - Fix some minor issues and do some cleanups in the davinci, e_powersaver, ap806, s5pv210, qcom and kryo cpufreq drivers (Bartosz Golaszewski, Gustavo Silva, Julia Lawall, Paweł Chmiel, Taniya Das, Viresh Kumar) - Add a Hisilicon CPPC quirk to the cppc_cpufreq driver (Xiongfeng Wang) - Clean up the intel_pstate and acpi-cpufreq drivers (Erwan Velu, Rafael Wysocki) - Clean up multiple cpufreq drivers (Yangtao Li) - Update cpufreq-related MAINTAINERS entries (Baruch Siach, Lukas Bulwahn) - Add support for exposing the Energy Model via debugfs and make multiple cpufreq drivers register an Energy Model to support energy-aware scheduling (Quentin Perret, Dietmar Eggemann, Matthias Kaehlcke) - Add Ice Lake mobile and Jacobsville support to the Intel RAPL power-capping driver (Gayatri Kammela, Zhang Rui) - Add a power estimation helper to the operating performance points (OPP) framework and clean up a core function in it (Quentin Perret, Viresh Kumar) - Make minor improvements in the generic power domains (genpd), OPP and system suspend frameworks and in the PM core (Aditya Pakki, Douglas Anderson, Greg Kroah-Hartman, Rafael Wysocki, Yangtao Li)" * tag 'pm-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (80 commits) cpufreq: kryo: Release OPP tables on module removal cpufreq: ap806: add missing of_node_put after of_device_is_available cpufreq: acpi-cpufreq: Report if CPU doesn't support boost technologies cpufreq: Pass updated policy to driver ->setpolicy() callback cpufreq: Fix two debug messages in cpufreq_set_policy() cpufreq: Reorder and simplify cpufreq_update_policy() cpufreq: Add kerneldoc comments for two core functions PM / core: Add support to skip power management in device/driver model cpufreq: intel_pstate: Rework iowait boosting to be less aggressive cpufreq: intel_pstate: Eliminate intel_pstate_get_base_pstate() cpufreq: intel_pstate: Avoid redundant initialization of local vars powercap/intel_rapl: add Ice Lake mobile ACPI / processor: Set P_LVL{2,3} idle state descriptions cpufreq / cppc: Work around for Hisilicon CPPC cpufreq ACPI / CPPC: Add a helper to get desired performance cpufreq: davinci: move configuration to include/linux/platform_data cpufreq: speedstep: convert BUG() to BUG_ON() cpufreq: powernv: fix missing check of return value in init_powernv_pstates() cpufreq: longhaul: remove unneeded semicolon cpufreq: pcc-cpufreq: remove unneeded semicolon ..
| * Merge branch 'opp/power' into cpufreq/qcom-hwViresh Kumar2019-02-081-0/+6
| |\
| | * PM / OPP: Introduce a power estimation helperQuentin Perret2019-02-071-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Energy Model (EM) framework provides an API to let drivers register the active power of CPUs. The drivers are expected to provide a callback method which estimates the power consumed by a CPU at each available performance levels. How exactly this should be implemented, however, depends on the platform. On some systems, PM_OPP knows the voltage and frequency at which CPUs can run. When coupled with the CPU 'capacitance' (as provided by the 'dynamic-power-coefficient' devicetree binding), it is possible to estimate the dynamic power consumption of a CPU as P = C * V^2 * f, with C its capacitance and V and f respectively the voltage and frequency of the OPP. The Intelligent Power Allocator (IPA) thermal governor already implements that estimation method, in the thermal framework. However, this power estimation method can be applied to any platform where all the parameters are known (C, V and f), and not only those suffering thermal issues. As such, the code implementing this feature can be re-used to also populate the EM framework now used by EAS. As a first step, introduce in PM_OPP a helper function which CPUFreq drivers can use to register into the EM framework. This duplicates the power estimation done in IPA until it can be migrated to using the EM framework. This will be done later, once the EM framework has support for at least all platforms currently supported by IPA. Signed-off-by: Quentin Perret <quentin.perret@arm.com> Tested-by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* | | Merge tag 'qcom-drivers-for-5.1' of ↵Arnd Bergmann2019-02-151-0/+7
|\ \ \ | |/ / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux into arm/drivers Qualcomm ARM Based Driver Updates for v5.1 * Add Qualcomm RPMh power domain driver and related changes * Fix issues with sleep/wake sets and batch API in RPMh * Update MAINTAINERS Qualcomm entry * Fixup RMTFS-mem sysfs and uevents * Fix error handling in GSBI * Add SMD-RPM compatible entry for SDM660 * tag 'qcom-drivers-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux: soc: qcom: smd-rpm: Add sdm660 compatible soc: qcom: gsbi: Fix error handling in gsbi_probe() soc: qcom: rpmh: Avoid accessing freed memory from batch API drivers: qcom: rpmh: avoid sending sleep/wake sets immediately soc: qcom: rmtfs-mem: Make sysfs attributes world-readable soc: qcom: rmtfs-mem: Add class to enable uevents soc: qcom: update config dependencies for QCOM_RPMPD soc: qcom: rpmpd: Drop family A RPM dependency MAINTAINERS: update list of qcom drivers soc: qcom: rpmhpd: Mark mx as a parent for cx soc: qcom: rpmhpd: Add RPMh power domain driver soc: qcom: rpmpd: Add support for get/set performance state soc: qcom: rpmpd: Add a Power domain driver to model corners dt-bindings: power: Add qcom rpm power domain driver bindings OPP: Add support for parsing the 'opp-level' property dt-bindings: opp: Introduce opp-level bindings Signed-off-by: Arnd Bergmann <arnd@arndb.de>
| * | OPP: Add support for parsing the 'opp-level' propertyRajendra Nayak2019-01-221-0/+7
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | Now that the OPP bindings are updated to include an optional 'opp-level' property, add support to parse it from device tree and store it as part of dev_pm_opp structure. Also add and export an helper 'dev_pm_opp_get_level()' that can be used to get the level value read from device tree when present. Reviewed-by: Stephen Boyd <swboyd@chromium.org> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Andy Gross <andy.gross@linaro.org>
* / cpufreq: scpi/scmi: Fix freeing of dynamic OPPsViresh Kumar2019-01-041-0/+5
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | Since the commit 2a4eb7358aba "OPP: Don't remove dynamic OPPs from _dev_pm_opp_remove_table()", dynamically created OPP aren't automatically removed anymore by dev_pm_opp_cpumask_remove_table(). This affects the scpi and scmi cpufreq drivers which no longer free OPPs on failures or on invocations of the policy->exit() callback. Create a generic OPP helper dev_pm_opp_remove_all_dynamic() which can be called from these drivers instead of dev_pm_opp_cpumask_remove_table(). In dev_pm_opp_remove_all_dynamic(), we need to make sure that the opp_list isn't getting accessed simultaneously from other parts of the OPP core while the helper is freeing dynamic OPPs, i.e. we can't drop the opp_table->lock while traversing through the OPP list. And to accomplish that, this patch also creates _opp_kref_release_unlocked() which can be called from this new helper with the opp_table lock already held. Cc: 4.20 <stable@vger.kernel.org> # v4.20 Reported-by: Valentin Schneider <valentin.schneider@arm.com> Fixes: 2a4eb7358aba "OPP: Don't remove dynamic OPPs from _dev_pm_opp_remove_table()" Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Valentin Schneider <valentin.schneider@arm.com> Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* OPP: Don't return 0 on error from of_get_required_opp_performance_state()Viresh Kumar2018-12-141-3/+3
| | | | | | | | | | | | | | | | | | of_get_required_opp_performance_state() returns 0 on errors currently and a positive performance state otherwise. Since 0 is a valid performance state (representing off), it would be better if this routine returns negative values on error. That will also make it behave similar to dev_pm_opp_xlate_performance_state(), which also returns performance states and returns negative values on error. Change the return type of the function to "int" in order to return negative values. This doesn't have any users for now and so no other part of the kernel will be impacted with this change. Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* OPP: Add dev_pm_opp_xlate_performance_state() helperViresh Kumar2018-12-141-0/+7
| | | | | | | | | | | | | | | | | | | | | | dev_pm_genpd_set_performance_state() needs to handle performance state propagation going forward. Currently this routine only gets the required performance state of the device's genpd as an argument, but it doesn't know how to translate that to master genpd(s) of the device's genpd. Introduce a new helper dev_pm_opp_xlate_performance_state() which will be used to translate from performance state of a device (or genpd sub-domain) to another device (or master genpd). Normally the src_table (of genpd sub-domain) will have the "required_opps" property set to point to one of the OPPs in the dst_table (of master genpd), but in some cases the genpd and its master have one to one mapping of performance states and so none of them have the "required-opps" property set. Return the performance state of the src_table as it is in such cases. Tested-by: Rajendra Nayak <rnayak@codeaurora.org> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* OPP: Remove of_dev_pm_opp_find_required_opp()Viresh Kumar2018-11-051-5/+0
| | | | | | | This isn't used anymore, remove it. Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* OPP: Rename and relocate of_genpd_opp_to_performance_state()Viresh Kumar2018-11-051-0/+5
| | | | | | | | | | | | | | The OPP core already has the performance state values for each of the genpd's OPPs and there is no need to call the genpd callback again to get the performance state for the case where the end device doesn't have an OPP table and has the "required-opps" property directly in its node. This commit renames of_genpd_opp_to_performance_state() as of_get_required_opp_performance_state() and moves it to the OPP core, as it is all about OPP stuff now. Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* OPP: Add dev_pm_opp_{set|put}_genpd_virt_dev() helperViresh Kumar2018-11-051-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Multiple generic power domains for a consumer device are supported with the help of virtual devices, which are created for each consumer device - genpd pair. These are the device structures which are attached to the power domain and are required by the OPP core to set the performance state of the genpd. The helpers added by this commit are required to be called once for each of these virtual devices. These are required only if multiple domains are available for a device, otherwise the actual device structure will be used instead by the OPP core. The new helpers also support the complex cases where the consumer device wouldn't always require all the domains. For example, a camera may require only one power domain during normal operations but two during high resolution operations. The consumer driver can call dev_pm_opp_put_genpd_virt_dev(high_resolution_genpd_virt_dev) if it is currently operating in the normal mode and doesn't have any performance requirements from the genpd which manages high resolution power requirements. The consumer driver can later call dev_pm_opp_set_genpd_virt_dev(high_resolution_genpd_virt_dev) once it switches back to the high resolution mode. The new helpers differ from other OPP set/put helpers as the new ones can be called with OPPs initialized for the table as we may need to call them on the fly because of the complex case explained above. For this reason it is possible that the genpd virt_dev structure may be used in parallel while the new helpers are running and a new mutex is added to protect against that. We didn't use the existing opp_table->lock mutex as that is widely used in the OPP core and we will need this lock in the dev_pm_opp_set_rate() helper while changing OPP and we need to make sure there is not much contention while doing that as that's the hotpath. Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* OPP: Pass index to _of_init_opp_table()Viresh Kumar2018-09-191-0/+6
| | | | | | | | | | | | This is a preparatory patch required for the next commit which will start using OPP table's node pointer in _of_init_opp_table(), which requires the index in order to read the OPP table's phandle. This commit adds the index argument in the call chains in order to get it delivered to _of_init_opp_table(). Tested-by: Niklas Cassel <niklas.cassel@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* PM / OPP: Remove dev_pm_opp_{un}register_get_pstate_helper()Viresh Kumar2018-05-091-10/+0
| | | | | | | These helpers aren't used anymore, remove them. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
* PM / OPP: Implement dev_pm_opp_get_of_node()Viresh Kumar2018-05-091-0/+5
| | | | | | | | | | | 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>
* PM / OPP: Implement of_dev_pm_opp_find_required_opp()Viresh Kumar2018-05-091-0/+6
| | | | | | | | | | | 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>
* PM / OPP: Implement dev_pm_opp_of_add_table_indexed()Viresh Kumar2018-05-091-0/+6
| | | | | | | | | | | 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>
* PM / OPP: Add dev_pm_opp_{un}register_get_pstate_helper()Viresh Kumar2017-10-141-0/+10
| | | | | | | | | | | | | This adds the dev_pm_opp_{un}register_get_pstate_helper() helper routines which will be used to set the get_pstate() callback for a device. This callback will be later called internally by the OPP core to get performance state corresponding to an OPP. This is required temporarily until the time we have proper DT bindings to include the performance state information. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* PM / OPP: Rename dev_pm_opp_register_put_opp_helper()Viresh Kumar2017-10-111-2/+2
| | | | | | | | | | | The routine is named incorrectly since the first attempt as there is nothing like a put_opp() helper. We wanted to unregister the set_opp() helper here and so it should rather be named as dev_pm_opp_unregister_set_opp_helper(). 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>
* PM / OPP: Add dev_pm_opp_{set|put}_clkname()Viresh Kumar2017-06-241-0/+9
| | | | | | | | | | | | | | | In order to support OPP switching, OPP layer needs to get pointer to the clock for the device. Simple cases work fine without using the routines added by this patch (i.e. by passing connection-id as NULL), but for a device with multiple clocks available, the OPP core needs to know the exact name of the clk to use. Add a new set of APIs to get that done. Tested-by: Rajendra Nayak <rnayak@codeaurora.org> 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>
* PM / OPP: Expose _of_get_opp_desc_node as dev_pm_opp APIDave Gerlach2017-02-091-0/+6
| | | | | | | | | | Rename _of_get_opp_desc_node to dev_pm_opp_of_get_opp_desc_node and add it to include/linux/pm_opp.h to allow other drivers, such as platform OPP and cpufreq drivers, to make use of it. Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Dave Gerlach <d-gerlach@ti.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* PM / OPP: Add 'struct kref' to struct dev_pm_oppViresh Kumar2017-01-301-0/+3
| | | | | | | | | | Add kref to struct dev_pm_opp for easier accounting of the OPPs. Note that the OPPs are freed under the opp_table->lock mutex only. 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>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-20 04:02:54 +0000