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![Hector Martin](/assets/img/avatar_default.png)
This driver implements CPU frequency scaling for Apple Silicon SoCs, including M1 (t8103), M1 Max/Pro/Ultra (t600x), and M2 (t8112). Each CPU cluster has its own register set, and frequency management is fully automated by the hardware; the driver only has to write one register. There is boost frequency support, but the hardware will only allow their use if only a subset of cores in a cluster are in non-deep-idle. Since we don't support deep idle yet, these frequencies are not achievable, but the driver supports them. They will remain disabled in the device tree until deep idle is implemented, to avoid confusing users. This driver does not yet implement the memory controller performance state tuning that usually accompanies higher CPU p-states. This will be done in a future patch. Acked-by: Marc Zyngier <maz@kernel.org> Signed-off-by: Hector Martin <marcan@marcan.st> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
368 lines
10 KiB
Text
368 lines
10 KiB
Text
# SPDX-License-Identifier: GPL-2.0-only
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#
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# ARM CPU Frequency scaling drivers
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#
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config ACPI_CPPC_CPUFREQ
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tristate "CPUFreq driver based on the ACPI CPPC spec"
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depends on ACPI_PROCESSOR
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select ACPI_CPPC_LIB
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help
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This adds a CPUFreq driver which uses CPPC methods
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as described in the ACPIv5.1 spec. CPPC stands for
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Collaborative Processor Performance Controls. It
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is based on an abstract continuous scale of CPU
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performance values which allows the remote power
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processor to flexibly optimize for power and
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performance. CPPC relies on power management firmware
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support for its operation.
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If in doubt, say N.
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config ACPI_CPPC_CPUFREQ_FIE
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bool "Frequency Invariance support for CPPC cpufreq driver"
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depends on ACPI_CPPC_CPUFREQ && GENERIC_ARCH_TOPOLOGY
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default y
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help
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This extends frequency invariance support in the CPPC cpufreq driver,
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by using CPPC delivered and reference performance counters.
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If in doubt, say N.
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config ARM_ALLWINNER_SUN50I_CPUFREQ_NVMEM
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tristate "Allwinner nvmem based SUN50I CPUFreq driver"
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depends on ARCH_SUNXI
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depends on NVMEM_SUNXI_SID
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select PM_OPP
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help
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This adds the nvmem based CPUFreq driver for Allwinner
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h6 SoC.
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To compile this driver as a module, choose M here: the
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module will be called sun50i-cpufreq-nvmem.
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config ARM_APPLE_SOC_CPUFREQ
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tristate "Apple Silicon SoC CPUFreq support"
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depends on ARCH_APPLE || (COMPILE_TEST && 64BIT)
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select PM_OPP
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default ARCH_APPLE
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help
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This adds the CPUFreq driver for Apple Silicon machines
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(e.g. Apple M1).
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config ARM_ARMADA_37XX_CPUFREQ
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tristate "Armada 37xx CPUFreq support"
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depends on ARCH_MVEBU && CPUFREQ_DT
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help
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This adds the CPUFreq driver support for Marvell Armada 37xx SoCs.
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The Armada 37xx PMU supports 4 frequency and VDD levels.
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config ARM_ARMADA_8K_CPUFREQ
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tristate "Armada 8K CPUFreq driver"
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depends on ARCH_MVEBU && CPUFREQ_DT
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select ARMADA_AP_CPU_CLK
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help
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This enables the CPUFreq driver support for Marvell
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Armada8k SOCs.
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Armada8K device has the AP806 which supports scaling
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to any full integer divider.
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If in doubt, say N.
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config ARM_SCPI_CPUFREQ
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tristate "SCPI based CPUfreq driver"
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depends on ARM_SCPI_PROTOCOL && COMMON_CLK_SCPI
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help
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This adds the CPUfreq driver support for ARM platforms using SCPI
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protocol for CPU power management.
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This driver uses SCPI Message Protocol driver to interact with the
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firmware providing the CPU DVFS functionality.
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config ARM_VEXPRESS_SPC_CPUFREQ
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tristate "Versatile Express SPC based CPUfreq driver"
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depends on ARM_CPU_TOPOLOGY && HAVE_CLK
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depends on ARCH_VEXPRESS_SPC
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select PM_OPP
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help
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This add the CPUfreq driver support for Versatile Express
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big.LITTLE platforms using SPC for power management.
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config ARM_BRCMSTB_AVS_CPUFREQ
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tristate "Broadcom STB AVS CPUfreq driver"
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depends on ARCH_BRCMSTB || COMPILE_TEST
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default y
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help
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Some Broadcom STB SoCs use a co-processor running proprietary firmware
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("AVS") to handle voltage and frequency scaling. This driver provides
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a standard CPUfreq interface to to the firmware.
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Say Y, if you have a Broadcom SoC with AVS support for DFS or DVFS.
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config ARM_HIGHBANK_CPUFREQ
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tristate "Calxeda Highbank-based"
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depends on ARCH_HIGHBANK && CPUFREQ_DT && REGULATOR
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default m
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help
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This adds the CPUFreq driver for Calxeda Highbank SoC
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based boards.
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If in doubt, say N.
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config ARM_IMX6Q_CPUFREQ
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tristate "Freescale i.MX6 cpufreq support"
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depends on ARCH_MXC
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depends on REGULATOR_ANATOP
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depends on NVMEM_IMX_OCOTP || COMPILE_TEST
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select PM_OPP
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help
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This adds cpufreq driver support for Freescale i.MX6 series SoCs.
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If in doubt, say N.
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config ARM_IMX_CPUFREQ_DT
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tristate "Freescale i.MX8M cpufreq support"
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depends on ARCH_MXC && CPUFREQ_DT
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help
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This adds cpufreq driver support for Freescale i.MX8M series SoCs,
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based on cpufreq-dt.
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If in doubt, say N.
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config ARM_KIRKWOOD_CPUFREQ
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def_bool MACH_KIRKWOOD
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help
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This adds the CPUFreq driver for Marvell Kirkwood
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SoCs.
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config ARM_MEDIATEK_CPUFREQ
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tristate "CPU Frequency scaling support for MediaTek SoCs"
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depends on ARCH_MEDIATEK && REGULATOR
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select PM_OPP
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help
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This adds the CPUFreq driver support for MediaTek SoCs.
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config ARM_MEDIATEK_CPUFREQ_HW
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tristate "MediaTek CPUFreq HW driver"
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depends on ARCH_MEDIATEK || COMPILE_TEST
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default m
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help
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Support for the CPUFreq HW driver.
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Some MediaTek chipsets have a HW engine to offload the steps
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necessary for changing the frequency of the CPUs. Firmware loaded
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in this engine exposes a programming interface to the OS.
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The driver implements the cpufreq interface for this HW engine.
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Say Y if you want to support CPUFreq HW.
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config ARM_OMAP2PLUS_CPUFREQ
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bool "TI OMAP2+"
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depends on ARCH_OMAP2PLUS
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default ARCH_OMAP2PLUS
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config ARM_QCOM_CPUFREQ_NVMEM
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tristate "Qualcomm nvmem based CPUFreq"
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depends on ARCH_QCOM
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depends on NVMEM_QCOM_QFPROM
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depends on QCOM_SMEM
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select PM_OPP
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help
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This adds the CPUFreq driver for Qualcomm Kryo SoC based boards.
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If in doubt, say N.
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config ARM_QCOM_CPUFREQ_HW
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tristate "QCOM CPUFreq HW driver"
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depends on ARCH_QCOM || COMPILE_TEST
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help
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Support for the CPUFreq HW driver.
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Some QCOM chipsets have a HW engine to offload the steps
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necessary for changing the frequency of the CPUs. Firmware loaded
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in this engine exposes a programming interface to the OS.
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The driver implements the cpufreq interface for this HW engine.
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Say Y if you want to support CPUFreq HW.
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config ARM_RASPBERRYPI_CPUFREQ
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tristate "Raspberry Pi cpufreq support"
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depends on CLK_RASPBERRYPI || COMPILE_TEST
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help
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This adds the CPUFreq driver for Raspberry Pi
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If in doubt, say N.
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config ARM_S3C_CPUFREQ
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bool
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help
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Internal configuration node for common cpufreq on Samsung SoC
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config ARM_S3C24XX_CPUFREQ
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bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
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depends on ARCH_S3C24XX
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select ARM_S3C_CPUFREQ
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help
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This enables the CPUfreq driver for the Samsung S3C24XX family
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of CPUs.
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For details, take a look at <file:Documentation/cpu-freq>.
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If in doubt, say N.
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config ARM_S3C24XX_CPUFREQ_DEBUG
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bool "Debug CPUfreq Samsung driver core"
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depends on ARM_S3C24XX_CPUFREQ
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help
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Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
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config ARM_S3C24XX_CPUFREQ_IODEBUG
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bool "Debug CPUfreq Samsung driver IO timing"
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depends on ARM_S3C24XX_CPUFREQ
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help
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Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
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config ARM_S3C24XX_CPUFREQ_DEBUGFS
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bool "Export debugfs for CPUFreq"
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depends on ARM_S3C24XX_CPUFREQ && DEBUG_FS
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help
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Export status information via debugfs.
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config ARM_S3C2410_CPUFREQ
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bool
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depends on ARM_S3C24XX_CPUFREQ && CPU_S3C2410
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help
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CPU Frequency scaling support for S3C2410
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config ARM_S3C2412_CPUFREQ
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bool
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depends on ARM_S3C24XX_CPUFREQ && CPU_S3C2412
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default y
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select S3C2412_IOTIMING
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help
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CPU Frequency scaling support for S3C2412 and S3C2413 SoC CPUs.
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config ARM_S3C2416_CPUFREQ
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bool "S3C2416 CPU Frequency scaling support"
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depends on CPU_S3C2416
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help
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This adds the CPUFreq driver for the Samsung S3C2416 and
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S3C2450 SoC. The S3C2416 supports changing the rate of the
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armdiv clock source and also entering a so called dynamic
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voltage scaling mode in which it is possible to reduce the
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core voltage of the CPU.
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If in doubt, say N.
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config ARM_S3C2416_CPUFREQ_VCORESCALE
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bool "Allow voltage scaling for S3C2416 arm core"
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depends on ARM_S3C2416_CPUFREQ && REGULATOR
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help
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Enable CPU voltage scaling when entering the dvs mode.
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It uses information gathered through existing hardware and
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tests but not documented in any datasheet.
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If in doubt, say N.
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config ARM_S3C2440_CPUFREQ
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bool "S3C2440/S3C2442 CPU Frequency scaling support"
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depends on ARM_S3C24XX_CPUFREQ && (CPU_S3C2440 || CPU_S3C2442)
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default y
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help
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CPU Frequency scaling support for S3C2440 and S3C2442 SoC CPUs.
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config ARM_S3C64XX_CPUFREQ
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bool "Samsung S3C64XX"
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depends on CPU_S3C6410
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default y
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help
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This adds the CPUFreq driver for Samsung S3C6410 SoC.
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If in doubt, say N.
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config ARM_S5PV210_CPUFREQ
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bool "Samsung S5PV210 and S5PC110"
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depends on CPU_S5PV210
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default y
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help
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This adds the CPUFreq driver for Samsung S5PV210 and
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S5PC110 SoCs.
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If in doubt, say N.
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config ARM_SA1100_CPUFREQ
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bool
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config ARM_SA1110_CPUFREQ
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bool
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config ARM_SCMI_CPUFREQ
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tristate "SCMI based CPUfreq driver"
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depends on ARM_SCMI_PROTOCOL || COMPILE_TEST
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select PM_OPP
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help
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This adds the CPUfreq driver support for ARM platforms using SCMI
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protocol for CPU power management.
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This driver uses SCMI Message Protocol driver to interact with the
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firmware providing the CPU DVFS functionality.
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config ARM_SPEAR_CPUFREQ
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bool "SPEAr CPUFreq support"
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depends on PLAT_SPEAR
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default y
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help
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This adds the CPUFreq driver support for SPEAr SOCs.
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config ARM_STI_CPUFREQ
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tristate "STi CPUFreq support"
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depends on CPUFREQ_DT && SOC_STIH407
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help
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This driver uses the generic OPP framework to match the running
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platform with a predefined set of suitable values. If not provided
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we will fall-back so safe-values contained in Device Tree. Enable
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this config option if you wish to add CPUFreq support for STi based
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SoCs.
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config ARM_TEGRA20_CPUFREQ
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tristate "Tegra20/30 CPUFreq support"
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depends on ARCH_TEGRA && CPUFREQ_DT
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default y
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help
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This adds the CPUFreq driver support for Tegra20/30 SOCs.
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config ARM_TEGRA124_CPUFREQ
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bool "Tegra124 CPUFreq support"
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depends on ARCH_TEGRA && CPUFREQ_DT
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default y
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help
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This adds the CPUFreq driver support for Tegra124 SOCs.
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config ARM_TEGRA186_CPUFREQ
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tristate "Tegra186 CPUFreq support"
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depends on ARCH_TEGRA && TEGRA_BPMP
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help
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This adds the CPUFreq driver support for Tegra186 SOCs.
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config ARM_TEGRA194_CPUFREQ
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tristate "Tegra194 CPUFreq support"
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depends on ARCH_TEGRA_194_SOC && TEGRA_BPMP
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default y
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help
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This adds CPU frequency driver support for Tegra194 SOCs.
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config ARM_TI_CPUFREQ
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bool "Texas Instruments CPUFreq support"
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depends on ARCH_OMAP2PLUS || ARCH_K3
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default y
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help
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This driver enables valid OPPs on the running platform based on
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values contained within the SoC in use. Enable this in order to
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use the cpufreq-dt driver on all Texas Instruments platforms that
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provide dt based operating-points-v2 tables with opp-supported-hw
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data provided. Required for cpufreq support on AM335x, AM437x,
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DRA7x, and AM57x platforms.
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config ARM_PXA2xx_CPUFREQ
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tristate "Intel PXA2xx CPUfreq driver"
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depends on PXA27x || PXA25x
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help
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This add the CPUFreq driver support for Intel PXA2xx SOCs.
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If in doubt, say N.
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