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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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a871be6b8e
The Qualcomm SPM cpuidle driver seems to be the last driver still
using the generic ARM CPUidle infrastructure.
Converting it actually allows us to simplify the driver,
and we end up being able to remove more lines than adding new ones:
- We can parse the CPUidle states in the device tree directly
with dt_idle_states (and don't need to duplicate that
functionality into the spm driver).
- Each "saw" device managed by the SPM driver now directly
registers its own cpuidle driver, removing the need for
any global (per cpu) state.
The device tree binding is the same, so the driver stays
compatible with all old device trees.
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Reviewed-by: Lina Iyer <ilina@codeaurora.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
110 lines
3.6 KiB
Plaintext
110 lines
3.6 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_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
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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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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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