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2019-08-26PM / devfreq: passive: fix compiler warningMyungJoo Ham1-1/+0
The recent commit of PM / devfreq: passive: Use non-devm notifiers had incurred compiler warning, "unused variable 'dev'". Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-25PM / devfreq: passive: Use non-devm notifiersLeonard Crestez1-3/+3
The devfreq passive governor registers and unregisters devfreq transition notifiers on DEVFREQ_GOV_START/GOV_STOP using devm wrappers. If devfreq itself is registered with devm then a warning is triggered on rmmod from devm_devfreq_unregister_notifier. Call stack looks like this: devm_devfreq_unregister_notifier+0x30/0x40 devfreq_passive_event_handler+0x4c/0x88 devfreq_remove_device.part.8+0x6c/0x9c devm_devfreq_dev_release+0x18/0x20 release_nodes+0x1b0/0x220 devres_release_all+0x78/0x84 device_release_driver_internal+0x100/0x1c0 driver_detach+0x4c/0x90 bus_remove_driver+0x7c/0xd0 driver_unregister+0x2c/0x58 platform_driver_unregister+0x10/0x18 imx_devfreq_platdrv_exit+0x14/0xd40 [imx_devfreq] This happens because devres_release_all will first remove all the nodes into a separate todo list so the nested devres_release from devm_devfreq_unregister_notifier won't find anything. Fix the warning by calling the non-devm APIS for frequency notification. Using devm wrappers is not actually useful for a governor anyway: it relies on the devfreq core to correctly match the GOV_START/GOV_STOP notifications. Fixes: 996133119f57 ("PM / devfreq: Add new passive governor") Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-25PM / devfreq: exynos-bus: Convert to use dev_pm_opp_set_rate()Kamil Konieczny1-106/+24
Reuse opp core code for setting bus clock and voltage. As a side effect this allow usage of coupled regulators feature (required for boards using Exynos5422/5800 SoCs) because dev_pm_opp_set_rate() uses regulator_set_voltage_triplet() for setting regulator voltage while the old code used regulator_set_voltage_tol() with fixed tolerance. This patch also removes no longer needed parsing of DT property "exynos,voltage-tolerance" (no Exynos devfreq DT node uses it). After applying changes both functions exynos_bus_passive_target() and exynos_bus_target() have the same code, so remove exynos_bus_passive_target(). In exynos_bus_probe() replace it with exynos_bus_target. Signed-off-by: Kamil Konieczny <k.konieczny@partner.samsung.com> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-25PM / devfreq: exynos-bus: Correct clock enable sequenceKamil Konieczny1-14/+17
Regulators should be enabled before clocks to avoid h/w hang. This require change in exynos_bus_probe() to move exynos_bus_parse_of() after exynos_bus_parent_parse_of() and change in error handling. Similar change is needed in exynos_bus_exit() where clock should be disabled before regulators. Signed-off-by: Kamil Konieczny <k.konieczny@partner.samsung.com> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-25PM / devfreq: Correct devm_devfreq_remove_device() documentationKrzysztof Kozlowski1-1/+1
Correct the documentation for devm_devfreq_remove_device() argument. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-25PM / devfreq: events: extend events by type of counted dataLukasz Luba1-19/+41
This patch adds posibility to choose what type of data should be counted by the PPMU counter. Now the type comes from DT where the event has been defined. When there is no 'event-data-type' the default value is used, which is 'read+write data in bytes'. It is needed when you want to know not only read+write data bytes but i.e. only write data in byte, or number of read requests, etc. Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> [Updated property by MyungJoo. data_type --> event_type] Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-25PM / devfreq: exynos-events: change matching code during probeLukasz Luba1-13/+25
The patch changes the way how the 'ops' gets populated for different device versions. The matching function now uses 'of_device_id' in order to identify the device type. Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-24PM / devfreq: tegra20: add COMMON_CLK dependencyArnd Bergmann1-0/+1
Compile-testing the new driver on platforms without CONFIG_COMMON_CLK leads to a link error: drivers/devfreq/tegra20-devfreq.o: In function `tegra_devfreq_target': tegra20-devfreq.c:(.text+0x288): undefined reference to `clk_set_min_rate' Add a dependency on COMMON_CLK to avoid this. Fixes: 1d39ee8dad6d ("PM / devfreq: Introduce driver for NVIDIA Tegra20") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Dmitry Osipenko <digetx@gmail.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-24PM / devfreq: events: add Exynos PPMU new eventsLukasz Luba1-0/+6
Define new performance events supported by Exynos5422 SoC counters. The counters are built-in in Dynamic Memory Controller and provide information regarding memory utilization. Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-24PM / devfreq: Fix kernel oops on governor module loadEzequiel Garcia1-1/+1
A bit unexpectedly (but still documented), request_module may return a positive value, in case of a modprobe error. This is currently causing issues in the devfreq framework. When a request_module exits with a positive value, we currently return that via ERR_PTR. However, because the value is positive, it's not a ERR_VALUE proper, and is therefore treated as a valid struct devfreq_governor pointer, leading to a kernel oops. Fix this by returning -EINVAL if request_module returns a positive value. Fixes: b53b0128052ff ("PM / devfreq: Fix static checker warning in try_then_request_governor") Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-24PM / devfreq: rk3399_dmc: Fix spelling typoGaël PORTAY1-1/+1
Reorder 'i' and 'v' in "drvier". Signed-off-by: Gaël PORTAY <gael.portay@collabora.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-24PM / devfreq: Fix spelling typoGaël PORTAY1-4/+4
Add missing 'r' in "monitoing". Signed-off-by: Gaël PORTAY <gael.portay@collabora.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-24PM / devfreq: Introduce driver for NVIDIA Tegra20Dmitry Osipenko3-0/+223
Add devfreq driver for NVIDIA Tegra20 SoC's. The driver periodically reads out Memory Controller counters and adjusts memory frequency based on the memory clients activity. Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> [Removed MAINTAINERS updates by MyungJoo so that it can be sent elsewhere.] Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-24PM / devfreq: tegra: Rename tegra-devfreq.c to tegra30-devfreq.cDmitry Osipenko2-1/+1
In order to reflect that driver serves NVIDIA Tegra30 and later SoC generations, let's rename the driver's source file to "tegra30-devfreq.c". This will make driver files to look more consistent after addition of a driver for Tegra20. Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-24PM / devfreq: tegra: Enable COMPILE_TEST for the driverDmitry Osipenko1-1/+2
The driver's compilation doesn't have any specific dependencies, hence the COMPILE_TEST option can be supported in Kconfig. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-24PM / devfreq: tegra: Support Tegra30Dmitry Osipenko2-2/+5
The devfreq driver can be used on Tegra30 without any code change and it works perfectly fine, the default Tegra124 parameters are good enough for Tegra30. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> [Modified by MyungJoo to depends on Tegra30/114/124/210 only] Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-24PM / devfreq: tegra: Reconfigure hardware on governor's restartDmitry Osipenko1-58/+40
Move hardware configuration to governor's start/resume methods. This allows to re-initialize hardware counters and reconfigure cleanly if governor was stopped/paused. That is needed because we are not aware of all hardware changes that happened while governor was stopped and the paused state may get out of sync with reality, hence it's better to start with a clean slate after the pause. In a result there is no memory bandwidth starvation after resume from suspend-to-ram that results in display controller underflowing that happens on resume because of improper decision made by devfreq about the required memory frequency. This change also cleans up code a tad by moving hardware-configuration code into a single location. Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-24PM / devfreq: tegra: Move governor registration to driver's probeDmitry Osipenko1-31/+12
There is no need to register the ACTMON's governor separately from the driver, hence let's move the registration into the driver's probe function for consistency and to make code cleaner a tad. Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-24PM / devfreq: tegra: Mark ACTMON's governor as immutableDmitry Osipenko2-1/+1
The ACTMON's governor supports only the Tegra's devfreq device and there is no need to use any other governor, hence let's mark Tegra governor as immutable to permanently stick it with Tegra's devfreq device. Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-24PM / devfreq: tegra: Avoid inconsistency of current frequency valueDmitry Osipenko1-2/+4
The frequency value potentially could change in-between. It doesn't cause any real problem at all right now, but that could change in the future. Hence let's avoid the inconsistency. Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-24PM / devfreq: tegra: Clean up driver's probe / removeDmitry Osipenko1-36/+47
Reset hardware, disable ACTMON clock, release OPP's and handle all possible error cases correctly, maintaining the correct tear down order. Also use devm_platform_ioremap_resource() which is now available in the kernel. Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-24PM / devfreq: tegra: Properly disable interruptsDmitry Osipenko1-6/+15
There is no guarantee that interrupt handling isn't running in parallel with tegra_actmon_disable_interrupts(), hence it is necessary to protect DEV_CTRL register accesses and clear IRQ status with ACTMON's IRQ being disabled in the Interrupt Controller in order to ensure that device interrupt is indeed being disabled. Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-24PM / devfreq: tegra: Drop primary interrupt handlerDmitry Osipenko1-37/+18
There is no real need in the primary interrupt handler, hence move everything to the secondary (threaded) handler. In a result locking is consistent now and there are no potential races with the interrupt handler because it is protected with the devfreq's mutex. Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-24PM / devfreq: tegra: Don't set EMC clock rate to maximum on probeDmitry Osipenko1-2/+0
There is no real benefit from doing so, hence let's drop that rate setting for consistency. Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-24PM / devfreq: tegra: Don't ignore clk errorsDmitry Osipenko1-2/+14
The clk_set_min_rate() could fail and in this case clk_set_rate() sets rate to 0, which may drop EMC rate to minimum and make machine very difficult to use. Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-24PM / devfreq: tegra: Replace write memory barrier with the read barrierDmitry Osipenko1-2/+1
The write memory barrier isn't needed because the BUS buffer is flushed by read after write that happens after the removed wmb(), we will also use readl() instead of the relaxed version to ensure that read is indeed completed. Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-24PM / devfreq: tegra: Replace readl-writel with relaxed versionsDmitry Osipenko1-4/+4
There is no need to insert memory barrier on each readl/writel invocation, hence use the relaxed versions. Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-08-24PM / devfreq: tegra: Fix kHz to Hz conversionDmitry Osipenko1-7/+5
The kHz to Hz is incorrectly converted in a few places in the code, this results in a wrong frequency being calculated because devfreq core uses OPP frequencies that are given in Hz to clamp the rate, while tegra-devfreq gives to the core value in kHz and then it also expects to receive value in kHz from the core. In a result memory freq is always set to a value which is close to ULONG_MAX because of the bug. Hence the EMC frequency is always capped to the maximum and the driver doesn't do anything useful. This patch was tested on Tegra30 and Tegra124 SoC's, EMC frequency scaling works properly now. Cc: <stable@vger.kernel.org> # 4.14+ Tested-by: Steev Klimaszewski <steev@kali.org> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-06-19treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500Thomas Gleixner13-52/+13
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>
2019-06-05treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288Thomas Gleixner2-18/+2
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 263 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141901.208660670@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201Thomas Gleixner1-13/+1
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 228 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528171438.107155473@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-21treewide: Add SPDX license identifier - Makefile/KconfigThomas Gleixner3-0/+3
Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-04-16PM / devfreq: add tracing for scheduling workLukasz Luba1-0/+5
This patch add basic tracing of the devfreq workqueue and delayed work. It aims to capture changes of the polling intervals and device state. Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-04-16PM / devfreq: rk3399_dmc: Pass ODT and auto power down parameters to TF-A.Enric Balletbo i Serra1-1/+70
Trusted Firmware-A (TF-A) for rk3399 implements a SiP call to get the on-die termination (ODT) and auto power down parameters from kernel, this patch adds the functionality to do this. Also, if DDR clock frequency is lower than the on-die termination (ODT) disable frequency this driver should disable the DDR ODT. Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Gaël PORTAY <gael.portay@collabora.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-04-16PM / devfreq: rockchip-dfi: Move GRF definitions to a common place.Enric Balletbo i Serra1-16/+7
Some rk3399 GRF (Generic Register Files) definitions can be used for different drivers. Move these definitions to a common include so we don't need to duplicate these definitions. Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Gaël PORTAY <gael.portay@collabora.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-04-16PM / devfreq: exynos-bus: Suspend all devices on system shutdownMarek Szyprowski1-0/+8
Force all Exynos buses to safe operation points before doing the system reboot operation. There are board on which some aggressive power saving operation points are behind the capabilities of the bootloader to properly reset the hardware and boot the board. This way one can avoid board crash early after reboot. This fixes reboot issue on OdroidU3 board both with eMMC and SD boot. Reported-by: Markus Reichl <m.reichl@fivetechno.de> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-04-16PM / devfreq: Fix static checker warning in try_then_request_governorEnric Balletbo i Serra1-2/+2
The patch 23c7b54ca1cd: "PM / devfreq: Fix devfreq_add_device() when drivers are built as modules." leads to the following static checker warning: drivers/devfreq/devfreq.c:1043 governor_store() warn: 'governor' can also be NULL The reason is that the try_then_request_governor() function returns both error pointers and NULL. It should just return error pointers, so fix this by returning a ERR_PTR to the error intead of returning NULL. Fixes: 23c7b54ca1cd ("PM / devfreq: Fix devfreq_add_device() when drivers are built as modules.") Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-04-16PM / devfreq: Restart previous governor if new governor fails to startSaravana Kannan1-2/+14
If the new governor fails to start, switch back to old governor so that the devfreq state is not left in some weird limbo. [Myungjoo: assume fatal on revert failure and set df->governor to NULL] Signed-off-by: Sibi Sankar <sibis@codeaurora.org> Signed-off-by: Saravana Kannan <skannan@codeaurora.org> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-04-16PM / devfreq: tegra: remove unneeded variableYangtao Li1-5/+2
This variable is not used after initialization, so remove it. And in order to unify the code style, move the location where the dev_get_drvdata is called by the way. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Acked-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-04-16PM / devfreq: rockchip-dfi: remove unneeded semicolonYangtao Li1-1/+1
The semicolon is unneeded, so remove it. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-04-16PM / devfreq: rk3399_dmc: remove unneeded semicolonYangtao Li1-1/+1
The semicolon is unneeded, so remove it. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-04-16PM / devfreq: consistent indentationMyungJoo Ham1-25/+24
Following up with complaints on inconsistent indentation from Yangtao Li, this fixes indentation inconsistency. In principle, this tries to put arguments aligned to the left including the first argument except for the case where the first argument is on the far-right side. Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Acked-by: Yangtao Li <tiny.windzz@gmail.com>
2019-04-16PM / devfreq: fix missing check of return value in devfreq_add_device()Yangtao Li1-1/+13
devm_kzalloc() could fail, so insert a check of its return value. And if it fails, returns -ENOMEM. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-04-16PM / devfreq: fix mem leak in devfreq_add_device()Yangtao Li1-1/+1
'devfreq' is malloced in devfreq_add_device() and should be freed in the error handling cases, otherwise it will cause memory leak. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2019-04-16PM / devfreq: Use of_node_name_eq for node name comparisonsRob Herring2-2/+2
Convert string compares of DT node names to use of_node_name_eq helper instead. This removes direct access to the node name pointer. For instances using of_node_cmp, this has the side effect of now using case sensitive comparisons. This should not matter for any FDT based system which all of these are. Cc: Chanwoo Choi <cw00.choi@samsung.com> Cc: MyungJoo Ham <myungjoo.ham@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: Kukjin Kim <kgene@kernel.org> Cc: Krzysztof Kozlowski <krzk@kernel.org> Cc: linux-pm@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-samsung-soc@vger.kernel.org Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2018-12-11PM / devfreq: add devfreq_suspend/resume() functionsLukasz Luba1-0/+44
This patch adds implementation for global suspend/resume for devfreq framework. System suspend will next use these functions. Suggested-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de> Suggested-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2018-12-11PM / devfreq: add support for suspend/resume of a devfreq deviceLukasz Luba1-6/+41
The patch prepares devfreq device for handling suspend/resume functionality. The new fields will store needed information during this process. Devfreq framework handles opp-suspend DT entry and there is no need of modyfications in the drivers code. It uses atomic variables to make sure no race condition affects the process. Suggested-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de> Suggested-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2018-12-11PM / devfreq: refactor set_target frequency functionLukasz Luba1-26/+36
The refactoring is needed for the new client in devfreq: suspend. To avoid code duplication, move it to the new local function devfreq_set_target. Suggested-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de> Suggested-by: Chanwoo Choi <cw00.choi@samsung.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2018-10-02PM / devfreq: remove redundant null pointer check before kfreezhong jiang1-2/+1
kfree has taken the null pointer into account. hence it is safe to remove the redundant null pointer check before kfree. Signed-off-by: zhong jiang <zhongjiang@huawei.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2018-10-02PM / devfreq: stopping the governor before device_unregister()Vincent Donnefort1-5/+4
device_release() is freeing the resources before calling the device specific release callback which is, in the case of devfreq, stopping the governor. It is a problem as some governors are using the device resources. e.g. simpleondemand which is using the devfreq deferrable monitoring work. If it is not stopped before the resources are freed, it might lead to a use after free. Signed-off-by: Vincent Donnefort <vincent.donnefort@arm.com> Reviewed-by: John Einar Reitan <john.reitan@arm.com> [cw00.choi: Fix merge conflict] Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
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