From: Chunyan Zhang <chunyan.zhang@xxxxxxxxxx>
Add a new property for-s2idle-only. The idle-state marked with this
property will be set with CPUIDLE_FLAG_S2IDLE during initialization
and it would be expected to be found as deepest state for s2idle
rather than other cases like play_idle().
Signed-off-by: Chunyan Zhang <chunyan.zhang@xxxxxxxxxx>
---
Documentation/devicetree/bindings/arm/idle-states.yaml | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/arm/idle-states.yaml b/Documentation/devicetree/bindings/arm/idle-states.yaml
index ea805c1e6b20..cec47b3a447f 100644
--- a/Documentation/devicetree/bindings/arm/idle-states.yaml
+++ b/Documentation/devicetree/bindings/arm/idle-states.yaml
@@ -263,7 +263,6 @@ patternProperties:
description: |
Each state node represents an idle state description and must be defined
as follows.
-
The idle state entered by executing the wfi instruction (idle_standby
SBSA,[3][4]) is considered standard on all ARM platforms and therefore
must not be listed.
@@ -283,6 +282,15 @@ patternProperties:
lost on state entry, otherwise it is retained.
type: boolean
+ for-s2idle-only:
+ description:
+ This indicates that the state only can be found as deepest state
+ for s2idle rather than other cases like play_idle(). In general,
+ the state having this property should have longer min-residency
+ than the cpuidle target min-residency which CPU QoS constraints
+ defines, to avoid being used by runtime cpuidle.
+ type: boolean
+
entry-latency-us:
description:
Worst case latency in microseconds required to enter the idle state.
--
2.20.1
