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Message-Id: <20230529101524.322076-1-songshuaishuai@tinylab.org>
Date: Mon, 29 May 2023 18:15:24 +0800
From: Song Shuai <songshuaishuai@...ylab.org>
To: paul.walmsley@...ive.com, palmer@...belt.com,
aou@...s.berkeley.edu, conor@...nel.org, suagrfillet@...il.com
Cc: linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
Song Shuai <songshuaishuai@...ylab.org>
Subject: [PATCH] riscv: Enable ARCH_SUSPEND_POSSIBLE for s2idle
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@...ylab.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
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