@@ -81,6 +81,14 @@ properties:
'#size-cells':
const: 0
+ atomic_threshold:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ An optional time value, expressed in microseconds, representing the
+ threshold above which, on this platform, any SCMI command advertised to
+ have a higher execution latency, should not be used in atomic mode, even
+ if requested. If left unconfigured defaults to zero.
+
arm,smc-id:
$ref: /schemas/types.yaml#/definitions/uint32
description:
@@ -264,6 +272,8 @@ 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> --- .../devicetree/bindings/firmware/arm,scmi.yaml | 10 ++++++++++ 1 file changed, 10 insertions(+)