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The RISC-V SBI HSM extension provides HSM suspend call which can be used by Linux RISC-V to enter platform specific low-power state. This patch adds a CPU idle driver based on RISC-V SBI calls which will populate idle states from device tree and use SBI calls to entry these idle states. Signed-off-by: Anup Patel <anup.patel@wdc.com> Signed-off-by: Anup Patel <apatel@ventanamicro.com> Acked-by: Atish Patra <atishp@rivosinc.com> Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
16 lines
438 B
Plaintext
16 lines
438 B
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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#
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# RISC-V CPU Idle drivers
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#
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config RISCV_SBI_CPUIDLE
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bool "RISC-V SBI CPU idle Driver"
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depends on RISCV_SBI
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select DT_IDLE_STATES
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select CPU_IDLE_MULTIPLE_DRIVERS
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select DT_IDLE_GENPD if PM_GENERIC_DOMAINS_OF
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help
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Select this option to enable RISC-V SBI firmware based CPU idle
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driver for RISC-V systems. This drivers also supports hierarchical
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DT based layout of the idle state.
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