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2021-06-18opp: Allow required-opps to be used for non genpd use casesHsin-Yi Wang2-22/+12
Don't limit required_opp_table to genpd only. One possible use case is cpufreq based devfreq governor, which can use required-opps property to derive devfreq from cpufreq. Though the OPP core still doesn't support non-genpd required-opps in _set_required_opps(). Suggested-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org> [ Viresh: Update _set_required_opps() to check for genpd ] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-05-20opp: use list_del_init instead of list_del/INIT_LIST_HEADYang Yingliang1-2/+1
Using list_del_init() instead of list_del() + INIT_LIST_HEAD() to simpify the code. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-03-16opp: Change return type of devm_pm_opp_attach_genpd()Dmitry Osipenko1-12/+6
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>
2021-03-16opp: Change return type of devm_pm_opp_register_set_opp_helper()Dmitry Osipenko1-12/+6
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>
2021-03-15opp: Add devres wrapper for dev_pm_opp_of_add_tableYangtao Li1-0/+36
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>
2021-03-15opp: Add devres wrapper for dev_pm_opp_set_supported_hwYangtao Li1-0/+29
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>
2021-03-15opp: Add devres wrapper for dev_pm_opp_set_regulatorsYangtao Li1-0/+30
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>
2021-03-15opp: Add devres wrapper for dev_pm_opp_set_clknameYangtao Li1-0/+27
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>
2021-03-12opp: Don't drop extra references to OPPs accidentallyBeata Michalska2-23/+27
We are required to call dev_pm_opp_put() from outside of the opp_table->lock as debugfs removal needs to happen lock-less to avoid circular dependency issues. commit cf1fac943c63 ("opp: Reduce the size of critical section in _opp_kref_release()") tried to fix that introducing a new routine _opp_get_next() which keeps returning OPPs that can be freed by the callers and this routine shall be called without holding the opp_table->lock. Though the commit overlooked the fact that the OPPs can be referenced by other users as well and this routine will end up dropping references which were taken by other users and hence freeing the OPPs prematurely. In effect, other users of the OPPs will end up having invalid pointers at hand. We didn't see any crash reports earlier as the exact situation never happened, though it is certainly possible. We need a way to mark which OPPs are no longer referenced by the OPP core, so we don't drop extra references to them accidentally. This commit adds another OPP flag, "removed", which is used to track this. And now we should never end up dropping extra references to the OPPs. Cc: v5.11+ <stable@vger.kernel.org> # v5.11+ Fixes: cf1fac943c63 ("opp: Reduce the size of critical section in _opp_kref_release()") Signed-off-by: Beata Michalska <beata.michalska@arm.com> [ Viresh: Almost rewrote entire patch, added new "removed" field, rewrote commit log and added the correct Fixes tag. ] Co-developed-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-02-18opp: Don't skip freq update for different frequencyJonathan Marek2-3/+7
We skip the OPP update if the current and target OPPs are same. This is fine for the devices that don't support frequency but may cause issues for the ones that need to program frequency. An OPP entry doesn't really signify a single operating frequency but rather the highest frequency at which the other properties of the OPP entry apply. And we may reach here with different frequency values, while all of them would point to the same OPP entry in the OPP table. We just need to update the clock frequency in that case, though in order to not add special exit points we reuse the code flow from a normal path. While at it, rearrange the conditionals in the 'if' statement to check 'enabled' flag at the end. Fixes: 81c4d8a3c414 ("opp: Keep track of currently programmed OPP") Signed-off-by: Jonathan Marek <jonathan@marek.ca> [ Viresh: Improved commit log and subject, rename current_freq as current_rate, document it, remove local variable and rearrange code. ] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-02-04OPP: Add function to look up required OPP's for a given OPPSaravana Kannan1-0/+55
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>
2021-02-02opp: Don't ignore clk_get() errors other than -ENOENTViresh Kumar1-7/+11
Not all devices that need to use OPP core need to have clocks, a missing clock is fine in which case -ENOENT shall be returned by clk_get(). Anything else is an error and must be handled properly. Reported-by: Dmitry Osipenko <digetx@gmail.com> Tested-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-02-02opp: Update bandwidth requirements based on scaling up/downViresh Kumar1-13/+27
The bandwidth must be scaled at a different point in the code flow based on if we are scaling up or down the frequency, otherwise this may cause undesired effects as the device will try to use more of the memory bandwidth which may be shared across several devices. Much like how regulators and required-opps are programmed. Reported-by: Dmitry Osipenko <digetx@gmail.com> Reported-by: Akhil P Oommen <akhilpo@codeaurora.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Dmitry Osipenko <digetx@gmail.com>
2021-02-02opp: Allow lazy-linking of required-oppsViresh Kumar3-16/+161
The OPP core currently requires the required opp tables to be available before the dependent OPP table is added, as it needs to create links from the dependent OPP table to the required ones. This may not be convenient for all the platforms though, as this requires strict ordering for probing the drivers. This patch allows lazy-linking of the required-opps. The OPP tables for which the required-opp-tables aren't available at the time of their initialization, are added to a special list of OPP tables: lazy_opp_tables. Later on, whenever a new OPP table is registered with the OPP core, we check if it is required by an OPP table in the pending list; if yes, then we complete the linking then and there. An OPP table is marked unusable until the time all its required-opp tables are available. And if lazy-linking fails for an OPP table, the OPP core disables all of its OPPs to make sure no one can use them. Tested-by: Hsin-Yi Wang <hsinyi@chromium.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-02-02opp: Remove dev_pm_opp_set_bw()Viresh Kumar1-36/+5
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>
2021-02-02opp: Implement dev_pm_opp_set_opp()Viresh Kumar1-0/+28
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>
2021-02-02opp: Update parameters of _set_opp_custom()Viresh Kumar1-13/+9
Drop the unnecessary parameters and follow the pattern from _generic_set_opp_regulator(). While at it, also remove the local variable old_freq. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Dmitry Osipenko <digetx@gmail.com>
2021-02-02opp: Allow _generic_set_opp_clk_only() to work for non-freq devicesViresh Kumar1-0/+4
In order to avoid conditional statements at the caller site, this patch updates _generic_set_opp_clk_only() to work for devices that don't change frequency (like power domains, etc.). Return 0 if the clk pointer passed to this routine is not valid. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Dmitry Osipenko <digetx@gmail.com>
2021-02-02opp: Allow _generic_set_opp_regulator() to work for non-freq devicesViresh Kumar1-13/+12
The _generic_set_opp_regulator() helper will be used for devices which don't change frequency (like power domains, etc.) later on, prepare for that by not relying on frequency for making decisions here. While at it, update its parameters to pass only what is necessary. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Dmitry Osipenko <digetx@gmail.com>
2021-02-02opp: Allow _set_opp() to work for non-freq devicesViresh Kumar1-5/+11
The _set_opp() helper will be used for devices which don't change frequency (like power domains, etc.) later on, prepare for that by not relying on frequency for making decisions here. While at it, also update the debug print to contain all relevant information. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Dmitry Osipenko <digetx@gmail.com>
2021-02-02opp: Split _set_opp() out of dev_pm_opp_set_rate()Viresh Kumar1-55/+71
The _set_opp() helper will be used for devices which don't change their frequency (like power domains, etc.) later on, prepare for that by breaking the generic part out of dev_pm_opp_set_rate(). Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Dmitry Osipenko <digetx@gmail.com>
2021-02-02opp: Keep track of currently programmed OPPViresh Kumar2-31/+55
The dev_pm_opp_set_rate() helper needs to know the currently programmed OPP to make few decisions and currently we try to find it on every invocation of this routine. Lets start keeping track of the current_opp programmed for the devices of the opp table, that will be quite useful going forward. If we fail to find the current OPP, we pick the first one available in the list, as the list is in ascending order of frequencies, level, or bandwidth and that's the best guess we can make anyway. Note that we used to do the frequency comparison a bit early in dev_pm_opp_set_rate() previously, and now instead we check the target opp, which shall be more accurate anyway. We need to make sure that current_opp's memory doesn't get freed while it is being used and so we keep a reference of it until the time it is used. Now that current_opp will always be set, we can drop some unnecessary checks as well. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Dmitry Osipenko <digetx@gmail.com>
2021-02-02opp: No need to check clk for errorsViresh Kumar1-13/+4
Clock is not optional for users who call into dev_pm_opp_set_rate(). Remove the unnecessary checks. While at it also drop the local variable for clk and use opp_table->clk instead. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Dmitry Osipenko <digetx@gmail.com>
2021-02-02opp: Rename _opp_set_rate_zero()Viresh Kumar1-2/+2
This routine has nothing to do with frequency, it just disables all the resources previously enabled. Rename it to match its purpose. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Dmitry Osipenko <digetx@gmail.com>
2021-02-02opp: Make _set_opp_custom() work without regulatorsDmitry Osipenko1-11/+18
Check whether OPP table has regulators in _set_opp_custom() and set up dev_pm_set_opp_data accordingly. Now _set_opp_custom() works properly, i.e. it doesn't crash if OPP table doesn't have assigned regulators. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> [ Viresh: Rearrange the routine a bit ] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-02-02opp: Prepare for ->set_opp() helper to work without regulatorsViresh Kumar2-38/+48
Until now the ->set_opp() helper (i.e. special implementation for setting the OPPs for platforms) was implemented only to take care of multiple regulators case, but going forward we would need that for other use cases as well. This patch prepares for that by allocating the regulator specific part from dev_pm_opp_set_regulators() and the opp helper part from dev_pm_opp_register_set_opp_helper(). Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Dmitry Osipenko <digetx@gmail.com>
2021-02-02opp: Print OPP level in debug message of _opp_add_static_v2()Dmitry Osipenko1-2/+3
Print OPP level in debug message of _opp_add_static_v2(). This helps to chase GENPD bugs. 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>
2021-02-02opp: Handle missing OPP table in dev_pm_opp_xlate_performance_state()Dmitry Osipenko1-1/+1
NVIDIA Tegra SoCs have a power domains topology such that child domains only clamp a power rail, while parent domain controls shared performance state of the multiple child domains. In this case child's domain doesn't need to have OPP table. Hence we want to allow children power domains to pass performance state to the parent domain if child's domain doesn't have OPP table. The dev_pm_opp_xlate_performance_state() gets src_table=NULL if a child power domain doesn't have OPP table and in this case we should pass the performance state to the parent domain. 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>
2021-02-02opp: Add devm_pm_opp_attach_genpdDmitry Osipenko1-0/+36
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>
2021-02-02opp: Add devm_pm_opp_register_set_opp_helperDmitry Osipenko1-0/+34
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>
2021-02-02opp: Add dev_pm_opp_of_add_table_noclk()Viresh Kumar1-0/+18
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>
2021-02-02opp: Defer acquiring the clk until OPPs are addedViresh Kumar3-33/+50
We acquire the clk at the time the OPP table is allocated, though it works fine, it is not the best place to do so. One of the main reason being we may need to acquire it again from dev_pm_opp_set_clkname() if the platform wants another clock to be acquired instead. There is also requirement from some of the platforms where they do not want the OPP core to manage the clock at all. This patch hence defers acquiring the clk until the time we are certain about which clk we need to acquire and if we really need to acquire one. With this commit, the clk will get acquired either from dev_pm_opp_set_clkname() or while we initialize the OPPs within the table. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Dmitry Osipenko <digetx@gmail.com>
2021-02-02opp: Create _of_add_table_indexed() to reduce code duplicationViresh Kumar1-48/+33
The implementation of dev_pm_opp_of_add_table() and dev_pm_opp_of_add_table_indexed() are almost identical. Create _of_add_table_indexed() to reduce code redundancy. Also remove the duplication of the doc style comments by referring to dev_pm_opp_of_add_table() from dev_pm_opp_of_add_table_indexed(). Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Dmitry Osipenko <digetx@gmail.com>
2021-02-02opp: Add dev_pm_opp_sync_regulators()Dmitry Osipenko1-0/+41
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>
2021-02-02opp: Add dev_pm_opp_get_required_pstate()Dmitry Osipenko1-0/+22
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>
2021-02-02opp: Add dev_pm_opp_find_level_ceil()Dmitry Osipenko1-0/+49
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>
2021-02-02opp: Staticize _add_opp_table()Viresh Kumar2-2/+1
_add_opp_table() isn't used outside of core.c, mark it static. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-02-02opp: Correct debug message in _opp_add_static_v2()Dmitry Osipenko1-2/+2
The debug message always prints rate=0 instead of a proper value, fix it. Fixes: 6c591eec67cb ("OPP: Add helpers for reading the binding properties") 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 Fixes tag ] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2021-02-02opp: Filter out OPPs based on availability of a required-OPPDmitry Osipenko1-0/+11
A required OPP may not be available, and thus, all OPPs which are using this required OPP should be unavailable too. 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>
2021-02-02opp: Fix adding OPP entries in a wrong order if rate is unavailableDmitry Osipenko1-6/+4
Fix adding OPP entries in a wrong (opposite) order if OPP rate is unavailable. The OPP comparison was erroneously skipped, thus OPPs were left unsorted. 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>
2020-12-28opp: Call the missing clk_put() on errorViresh Kumar1-1/+4
Fix the clock reference counting by calling the missing clk_put() in the error path. Cc: v5.10 <stable@vger.kernel.org> # v5.10 Fixes: dd461cd9183f ("opp: Allow dev_pm_opp_get_opp_table() to return -EPROBE_DEFER") Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2020-12-28opp: fix memory leak in _allocate_opp_tableQuanyang Wang1-2/+4
In function _allocate_opp_table, opp_dev is allocated and referenced by opp_table via _add_opp_dev. But in the case that the subsequent calls return -EPROBE_DEFER, it will jump to err label and opp_table will be freed. Then opp_dev becomes an unreferenced object to cause memory leak. So let's call _remove_opp_dev to do the cleanup. This fixes the following kmemleak report: unreferenced object 0xffff000801524a00 (size 128): comm "swapper/0", pid 1, jiffies 4294892465 (age 84.616s) hex dump (first 32 bytes): 40 00 56 01 08 00 ff ff 40 00 56 01 08 00 ff ff @.V.....@.V..... b8 52 77 7f 08 00 ff ff 00 3c 4c 00 08 00 ff ff .Rw......<L..... backtrace: [<00000000b1289fb1>] kmemleak_alloc+0x30/0x40 [<0000000056da48f0>] kmem_cache_alloc+0x3d4/0x588 [<00000000a84b3b0e>] _add_opp_dev+0x2c/0x88 [<0000000062a380cd>] _add_opp_table_indexed+0x124/0x268 [<000000008b4c8f1f>] dev_pm_opp_of_add_table+0x20/0x1d8 [<00000000e5316798>] dev_pm_opp_of_cpumask_add_table+0x48/0xf0 [<00000000db0a8ec2>] dt_cpufreq_probe+0x20c/0x448 [<0000000030a3a26c>] platform_probe+0x68/0xd8 [<00000000c618e78d>] really_probe+0xd0/0x3a0 [<00000000642e856f>] driver_probe_device+0x58/0xb8 [<00000000f10f5307>] device_driver_attach+0x74/0x80 [<0000000004f254b8>] __driver_attach+0x58/0xe0 [<0000000009d5d19e>] bus_for_each_dev+0x70/0xc8 [<0000000000d22e1c>] driver_attach+0x24/0x30 [<0000000001d4e952>] bus_add_driver+0x14c/0x1f0 [<0000000089928aaa>] driver_register+0x64/0x120 Cc: v5.10 <stable@vger.kernel.org> # v5.10 Fixes: dd461cd9183f ("opp: Allow dev_pm_opp_get_opp_table() to return -EPROBE_DEFER") Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com> [ Viresh: Added the stable tag ] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2020-12-15Merge branch 'pm-cpufreq'Rafael J. Wysocki1-1/+1
* pm-cpufreq: (31 commits) cpufreq: Fix cpufreq_online() return value on errors cpufreq: Fix up several kerneldoc comments cpufreq: stats: Use local_clock() instead of jiffies cpufreq: schedutil: Simplify sugov_update_next_freq() cpufreq: intel_pstate: Simplify intel_cpufreq_update_pstate() cpufreq: arm_scmi: Discover the power scale in performance protocol firmware: arm_scmi: Add power_scale_mw_get() interface cpufreq: tegra194: Rename tegra194_get_speed_common function cpufreq: tegra194: Remove unnecessary frequency calculation cpufreq: tegra186: Simplify cluster information lookup cpufreq: tegra186: Fix sparse 'incorrect type in assignment' warning cpufreq: imx: fix NVMEM_IMX_OCOTP dependency cpufreq: vexpress-spc: Add missing MODULE_ALIAS cpufreq: scpi: Add missing MODULE_ALIAS cpufreq: loongson1: Add missing MODULE_ALIAS cpufreq: sun50i: Add missing MODULE_DEVICE_TABLE cpufreq: st: Add missing MODULE_DEVICE_TABLE cpufreq: qcom: Add missing MODULE_DEVICE_TABLE cpufreq: mediatek: Add missing MODULE_DEVICE_TABLE cpufreq: highbank: Add missing MODULE_DEVICE_TABLE ...
2020-12-09Merge branch 'opp/empty' into opp/linux-nextViresh Kumar1-2/+5
2020-12-09opp: of: Allow empty opp-table with opp-sharedNicola Mazzucato1-2/+5
The opp binding now allows to have an empty opp table and shared-opp to still describe that devices share v/f lines. When initialising an empty opp table, allow such case by: - treating such conditions with warnings in place of errors - don't fail on empty table Signed-off-by: Nicola Mazzucato <nicola.mazzucato@arm.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2020-12-09opp: Allow dev_pm_opp_put_*() APIs to accept NULL opp_tableViresh Kumar1-0/+18
This allows the callers to drop the unnecessary checks. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2020-12-09opp: Don't create an OPP table from dev_pm_opp_get_opp_table()Viresh Kumar3-16/+16
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>
2020-12-09opp: Reduce the size of critical section in _opp_kref_release()Viresh Kumar1-47/+47
There is a lot of stuff here which can be done outside of the opp_table->lock, do that. This helps avoiding a circular dependency lockdeps around debugfs. Reported-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2020-11-10PM: EM: Add a flag indicating units of power values in Energy ModelLukasz Luba1-1/+1
There are different platforms and devices which might use different scale for the power values. Kernel sub-systems might need to check if all Energy Model (EM) devices are using the same scale. Address that issue and store the information inside EM for each device. Thanks to that they can be easily compared and proper action triggered. Suggested-by: Daniel Lezcano <daniel.lezcano@linaro.org> Reviewed-by: Quentin Perret <qperret@google.com> Signed-off-by: Lukasz Luba <lukasz.luba@arm.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2020-11-06opp: Don't return opp_dev from _find_opp_dev()Viresh Kumar1-12/+10
The caller of _find_opp_dev() only needs to know if the opp_dev is there in the list or not. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-27 01:05:20 +0300