linux-dev/drivers/cpufreq, branch linus/master

Merge tag 'arm-multiplatform-5.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

2022-06-02T22:23:54Z

Pull more ARM multiplatform updates from Arnd Bergmann: "The second part of the multiplatform changes now converts the Intel/Marvell PXA platform along with the rest. The patches went through several rebases before the merge window as bugs were found, so they remained separate. This has to touch a lot of drivers, in particular the touchscreen, pcmcia, sound and clk bits, to detach the driver files from the platform and board specific header files" * tag 'arm-multiplatform-5.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (48 commits) ARM: pxa/mmp: remove traces of plat-pxa ARM: pxa: convert to multiplatform ARM: pxa/sa1100: move I/O space to PCI_IOBASE ARM: pxa: remove support for MTD_XIP ARM: pxa: move mach/*.h to mach-pxa/ ARM: PXA: fix multi-cpu build of xsc3 ARM: pxa: move plat-pxa to drivers/soc/ ARM: mmp: rename pxa_register_device ARM: mmp: remove tavorevb board support ARM: pxa: remove unused mach/bitfield.h ARM: pxa: move clk register definitions to driver ARM: pxa: move smemc register access from clk to platform cpufreq: pxa3: move clk register access to clk driver ARM: pxa: remove get_clk_frequency_khz() ARM: pxa: pcmcia: move smemc configuration back to arch ASoC: pxa: i2s: use normal MMIO accessors ASoC: pxa: ac97: use normal MMIO accessors ASoC: pxa: use pdev resource for FIFO regs Input: wm97xx - get rid of irq_enable method in wm97xx_mach_ops Input: wm97xx - switch to using threaded IRQ ...

cpufreq: CPPC: Fix unused-function warning

2022-05-30T13:33:42Z

Building the cppc_cpufreq driver with for arm64 with CONFIG_ENERGY_MODEL=n triggers the following warnings: drivers/cpufreq/cppc_cpufreq.c:550:12: error: ‘cppc_get_cpu_cost’ defined but not used [-Werror=unused-function] 550 | static int cppc_get_cpu_cost(struct device *cpu_dev, unsigned long KHz, | ^~~~~~~~~~~~~~~~~ drivers/cpufreq/cppc_cpufreq.c:481:12: error: ‘cppc_get_cpu_power’ defined but not used [-Werror=unused-function] 481 | static int cppc_get_cpu_power(struct device *cpu_dev, | ^~~~~~~~~~~~~~~~~~ Move the Energy Model related functions into specific guards. This allows to fix the warning and prevent doing extra work when the Energy Model is not present. Fixes: 740fcdc2c20e ("cpufreq: CPPC: Register EM based on efficiency class information") Reported-by: Shaokun Zhang Signed-off-by: Pierre Gondois Tested-by: Shaokun Zhang Signed-off-by: Rafael J. Wysocki

cpufreq: CPPC: Fix build error without CONFIG_ACPI_CPPC_CPUFREQ_FIE

2022-05-30T13:31:28Z

If CONFIG_ACPI_CPPC_CPUFREQ_FIE is not set, building fails: drivers/cpufreq/cppc_cpufreq.c: In function ‘populate_efficiency_class’: drivers/cpufreq/cppc_cpufreq.c:584:2: error: ‘cppc_cpufreq_driver’ undeclared (first use in this function); did you mean ‘cpufreq_driver’? cppc_cpufreq_driver.register_em = cppc_cpufreq_register_em; ^~~~~~~~~~~~~~~~~~~ cpufreq_driver Make declare of cppc_cpufreq_driver out of CONFIG_ACPI_CPPC_CPUFREQ_FIE to fix this. Fixes: 740fcdc2c20e ("cpufreq: CPPC: Register EM based on efficiency class information") Signed-off-by: Zheng Bin Acked-by: Viresh Kumar Signed-off-by: Rafael J. Wysocki

Merge tag 'cpufreq-arm-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm

2022-05-25T13:01:30Z

Pull ARM cpufreq updates for 5.19-rc1 from Viresh Kumar: - Tegra234 cpufreq support (Sumit Gupta). - Mediatek cleanups and enhancements (Wan Jiabing, Rex-BC Chen, and Jia-Wei Chang). * tag 'cpufreq-arm-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm: (21 commits) cpufreq: mediatek: Add support for MT8186 cpufreq: mediatek: Link CCI device to CPU dt-bindings: cpufreq: mediatek: Add MediaTek CCI property cpufreq: mediatek: Fix potential deadlock problem in mtk_cpufreq_set_target cpufreq: mediatek: Add opp notification support cpufreq: mediatek: Refine mtk_cpufreq_voltage_tracking() cpufreq: mediatek: Move voltage limits to platform data cpufreq: mediatek: Unregister platform device on exit cpufreq: mediatek: Fix NULL pointer dereference in mediatek-cpufreq cpufreq: mediatek: Make sram regulator optional cpufreq: mediatek: Record previous target vproc value cpufreq: mediatek: Replace old_* with pre_* cpufreq: mediatek: Use device print to show logs cpufreq: mediatek: Enable clocks and regulators cpufreq: mediatek: Remove unused headers cpufreq: mediatek: Cleanup variables and error handling in mtk_cpu_dvfs_info_init() cpufreq: mediatek: Use module_init and add module_exit arm64: tegra: add node for tegra234 cpufreq cpufreq: tegra194: Add support for Tegra234 cpufreq: tegra194: add soc data to support multiple soc ...

cpufreq: CPPC: Enable dvfs_possible_from_any_cpu

2022-05-19T17:45:34Z

The communication mean of the _CPC desired performance can be PCC, System Memory, System IO, or Functional Fixed Hardware (FFH). PCC, SystemMemory and SystemIo address spaces are available from any CPU. Thus, dvfs_possible_from_any_cpu should be enabled in such case. For FFH, let the FFH implementation do smp_call_function_*() calls. Signed-off-by: Pierre Gondois Reviewed-by: Sudeep Holla Acked-by: Viresh Kumar Signed-off-by: Rafael J. Wysocki

cpufreq: CPPC: Enable fast_switch

2022-05-19T17:45:34Z

The communication mean of the _CPC desired performance can be PCC, System Memory, System IO, or Functional Fixed Hardware. commit b7898fda5bc7 ("cpufreq: Support for fast frequency switching") fast_switching is 'for switching CPU frequencies from interrupt context'. Writes to SystemMemory and SystemIo are fast and suitable this. This is not the case for PCC and might not be the case for FFH. Enable fast_switching for the cppc_cpufreq driver in above cases. Add cppc_allow_fast_switch() to check the desired performance register address space and set fast_switching accordingly. Signed-off-by: Pierre Gondois Reviewed-by: Sudeep Holla Acked-by: Viresh Kumar Signed-off-by: Rafael J. Wysocki

cpufreq: make interface functions and lock holding state clear

2022-05-17T19:39:05Z

cpufreq_offline() calls offline() and exit() under the policy rwsem But they are called outside the rwsem in cpufreq_online(). Make cpufreq_online() call offline() and exit() as well as online() and init() under the policy rwsem to achieve a clear lock relationship. All of the init() and online() implementations in the tree only initialize the policy object without attempting to acquire the policy rwsem and they won't call cpufreq APIs attempting to acquire it. Signed-off-by: Schspa Shi Acked-by: Viresh Kumar [ rjw: Changelog edits ] Signed-off-by: Rafael J. Wysocki

cpufreq: Abort show()/store() for half-initialized policies

2022-05-17T19:39:04Z

If policy initialization fails after the sysfs files are created, there is a possibility to end up running show()/store() callbacks for half-initialized policies, which may have unpredictable outcomes. Abort show()/store() in such a case by making sure the policy is active. Also dectivate the policy on such failures. Signed-off-by: Schspa Shi Acked-by: Viresh Kumar [ rjw: Subject and changelog edits ] Signed-off-by: Rafael J. Wysocki

cpufreq: Rearrange locking in cpufreq_remove_dev()

2022-05-12T15:11:57Z

Currently, cpufreq_remove_dev() invokes the ->exit() driver callback without holding the policy rwsem which is inconsistent with what happens if ->exit() is invoked directly from cpufreq_offline(). It also manipulates the real_cpus mask and removes the CPU device symlink without holding the policy rwsem, but cpufreq_offline() holds the rwsem around the modifications thereof. For consistency, modify cpufreq_remove_dev() to hold the policy rwsem until the ->exit() callback has been called (or it has been determined that it is not necessary to call it). Signed-off-by: Rafael J. Wysocki Acked-by: Viresh Kumar

cpufreq: Split cpufreq_offline()

2022-05-12T15:11:57Z

Split the "core" part running under the policy rwsem out of cpufreq_offline() to allow the locking in cpufreq_remove_dev() to be rearranged more easily. As a side-effect this eliminates the unlock label that's not needed any more. No expected functional impact. Signed-off-by: Rafael J. Wysocki Acked-by: Viresh Kumar