[PATCH] riscv: Enable ARCH_SUSPEND_POSSIBLE for s2idle
Andrew Jones
ajones at ventanamicro.com
Mon May 29 06:08:25 PDT 2023
On Mon, May 29, 2023 at 06:15:24PM +0800, Song Shuai wrote:
> With this configuration opened, the basic platform-independent s2idle is
> provided by the sole "s2idle" string in `/sys/power/mem_sleep`.
>
> At the end of s2idle, harts will hit the `wfi` instruction or enter the
> SUSPENDED state through the sbi_cpuidle driver. The interrupt of possible
> wakeup devices will be kept to wake the system up.
>
> And platform-specific sleep states can be provided by future ACPI and
> SBI SUSP extension support.
>
> Signed-off-by: Song Shuai <songshuaishuai at tinylab.org>
> ---
> arch/riscv/Kconfig | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> index 348c0fa1fc8c..4bb818035585 100644
> --- a/arch/riscv/Kconfig
> +++ b/arch/riscv/Kconfig
> @@ -805,6 +805,9 @@ config ARCH_HIBERNATION_POSSIBLE
> config ARCH_HIBERNATION_HEADER
> def_bool HIBERNATION
>
> +config ARCH_SUSPEND_POSSIBLE
> + def_bool y
> +
> endmenu # "Power management options"
>
> menu "CPU Power Management"
> --
> 2.20.1
>
Reviewed-by: Andrew Jones <ajones at ventanamicro.com>
Thanks,
drew
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