60f3692b5f
In commit a871be6b8eee ("cpuidle: Convert Qualcomm SPM driver to a generic
CPUidle driver") the SPM driver has been converted to a
generic CPUidle driver: that was mainly made to simplify the
driver and that was a great accomplishment;
Though, at that time, this driver was only applicable to ARM 32-bit SoCs,
lacking logic about the handling of newer generation SAW.
In preparation for the enablement of SPM features on AArch64/ARM64,
split the cpuidle-qcom-spm driver in two: the CPUIdle related
state machine (currently used only on ARM SoCs) stays there, while
the SPM communication handling lands back in soc/qcom/spm.c and
also making sure to not discard the simplifications that were
introduced in the aforementioned commit.
Since now the "two drivers" are split, the SCM dependency in the
main SPM handling is gone and for this reason it was also possible
to move the SPM initialization early: this will also make sure that
whenever the SAW CPUIdle driver is getting initialized, the SPM
driver will be ready to do the job.
Please note that the anticipation of the SPM initialization was
also done to optimize the boot times on platforms that have their
CPU/L2 idle states managed by other means (such as PSCI), while
needing SAW initialization for other purposes, like AVS control.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Reviewed-by: Stephan Gerhold <stephan@gerhold.net>
Tested-by: Stephan Gerhold <stephan@gerhold.net>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210729155609.608159-2-angelogioacchino.delregno@somainline.org
121 lines
3.9 KiB
Plaintext
121 lines
3.9 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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#
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# ARM CPU Idle drivers
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#
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config ARM_CPUIDLE
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bool "Generic ARM/ARM64 CPU idle Driver"
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select DT_IDLE_STATES
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select CPU_IDLE_MULTIPLE_DRIVERS
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help
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Select this to enable generic cpuidle driver for ARM.
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It provides a generic idle driver whose idle states are configured
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at run-time through DT nodes. The CPUidle suspend backend is
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initialized by calling the CPU operations init idle hook
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provided by architecture code.
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config ARM_PSCI_CPUIDLE
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bool "PSCI CPU idle Driver"
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depends on ARM_PSCI_FW
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select DT_IDLE_STATES
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select CPU_IDLE_MULTIPLE_DRIVERS
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help
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Select this to enable PSCI firmware based CPUidle driver for ARM.
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It provides an idle driver that is capable of detecting and
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managing idle states through the PSCI firmware interface.
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config ARM_PSCI_CPUIDLE_DOMAIN
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bool "PSCI CPU idle Domain"
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depends on ARM_PSCI_CPUIDLE
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depends on PM_GENERIC_DOMAINS_OF
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default y
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help
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Select this to enable the PSCI based CPUidle driver to use PM domains,
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which is needed to support the hierarchical DT based layout of the
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idle states.
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config ARM_BIG_LITTLE_CPUIDLE
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bool "Support for ARM big.LITTLE processors"
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depends on ARCH_VEXPRESS_TC2_PM || ARCH_EXYNOS || COMPILE_TEST
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depends on MCPM && !ARM64
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select ARM_CPU_SUSPEND
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select CPU_IDLE_MULTIPLE_DRIVERS
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select DT_IDLE_STATES
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help
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Select this option to enable CPU idle driver for big.LITTLE based
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ARM systems. Driver manages CPUs coordination through MCPM and
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define different C-states for little and big cores through the
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multiple CPU idle drivers infrastructure.
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config ARM_CLPS711X_CPUIDLE
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bool "CPU Idle Driver for CLPS711X processors"
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depends on ARCH_CLPS711X && !ARM64 || COMPILE_TEST
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help
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Select this to enable cpuidle on Cirrus Logic CLPS711X SOCs.
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config ARM_HIGHBANK_CPUIDLE
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bool "CPU Idle Driver for Calxeda processors"
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depends on ARM_PSCI && !ARM64
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select ARM_CPU_SUSPEND
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help
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Select this to enable cpuidle on Calxeda processors.
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config ARM_KIRKWOOD_CPUIDLE
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bool "CPU Idle Driver for Marvell Kirkwood SoCs"
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depends on (MACH_KIRKWOOD || COMPILE_TEST) && !ARM64
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help
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This adds the CPU Idle driver for Marvell Kirkwood SoCs.
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config ARM_ZYNQ_CPUIDLE
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bool "CPU Idle Driver for Xilinx Zynq processors"
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depends on (ARCH_ZYNQ || COMPILE_TEST) && !ARM64
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help
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Select this to enable cpuidle on Xilinx Zynq processors.
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config ARM_U8500_CPUIDLE
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bool "Cpu Idle Driver for the ST-E u8500 processors"
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depends on ARCH_U8500 && !ARM64
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help
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Select this to enable cpuidle for ST-E u8500 processors.
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config ARM_AT91_CPUIDLE
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bool "Cpu Idle Driver for the AT91 processors"
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default y
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depends on (ARCH_AT91 || COMPILE_TEST) && !ARM64
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help
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Select this to enable cpuidle for AT91 processors.
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config ARM_EXYNOS_CPUIDLE
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bool "Cpu Idle Driver for the Exynos processors"
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depends on (ARCH_EXYNOS || COMPILE_TEST) && !ARM64
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select ARCH_NEEDS_CPU_IDLE_COUPLED if SMP
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help
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Select this to enable cpuidle for Exynos processors.
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config ARM_MVEBU_V7_CPUIDLE
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bool "CPU Idle Driver for mvebu v7 family processors"
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depends on (ARCH_MVEBU || COMPILE_TEST) && !ARM64
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help
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Select this to enable cpuidle on Armada 370, 38x and XP processors.
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config ARM_TEGRA_CPUIDLE
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bool "CPU Idle Driver for NVIDIA Tegra SoCs"
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depends on ARCH_TEGRA && !ARM64
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select ARCH_NEEDS_CPU_IDLE_COUPLED if SMP
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select ARM_CPU_SUSPEND
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help
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Select this to enable cpuidle for NVIDIA Tegra20/30/114/124 SoCs.
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config ARM_QCOM_SPM_CPUIDLE
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bool "CPU Idle Driver for Qualcomm Subsystem Power Manager (SPM)"
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depends on (ARCH_QCOM || COMPILE_TEST) && !ARM64 && MMU
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select ARM_CPU_SUSPEND
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select CPU_IDLE_MULTIPLE_DRIVERS
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select DT_IDLE_STATES
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select QCOM_SCM
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select QCOM_SPM
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help
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Select this to enable cpuidle for Qualcomm processors.
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The Subsystem Power Manager (SPM) controls low power modes for the
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CPU and L2 cores. It interface with various system drivers to put
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the cores in low power modes.
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