@@ -81,6 +81,15 @@ properties:
'#size-cells':
const: 0
+ atomic-threshold-us:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ An optional time value, expressed in microseconds, representing, on this
+ platform, the threshold above which any SCMI command, advertised to have
+ an higher-than-threshold execution latency, should not be considered for
+ atomic mode of operation, even if requested.
+ If left unconfigured defaults to zero.
+
arm,smc-id:
$ref: /schemas/types.yaml#/definitions/uint32
description:
@@ -264,6 +273,8 @@ examples:
#address-cells = <1>;
#size-cells = <0>;
+ atomic_threshold = <10000>;
+
scmi_devpd: protocol@11 {
reg = <0x11>;
#power-domain-cells = <1>;
SCMI protocols in the platform can optionally signal to the OSPM agent the expected execution latency for a specific resource/operation pair. Introduce an SCMI system wide optional property to describe a global time threshold which can be configured on a per-platform base to determine the opportunity, or not, for an SCMI command advertised to have a higher latency than the threshold, to be considered for atomic operations: high-latency SCMI synchronous commands should be preferably issued in the usual non-atomic mode. Cc: Rob Herring <robh+dt@kernel.org> Cc: devicetree@vger.kernel.org Signed-off-by: Cristian Marussi <cristian.marussi@arm.com> --- v3 --> v4 - renamed property to atomic-threshold-us v1 --> v2 - rephrased the property description --- .../devicetree/bindings/firmware/arm,scmi.yaml | 11 +++++++++++ 1 file changed, 11 insertions(+)