The K3 AM64x SoCs have two dual-core Arm R5F clusters/subsystems, with
2 R5F cores each, both in the MAIN voltage domain.
These clusters are a revised IP version compared to those present on
J721E and J7200 SoCs, and supports a new "Single-CPU" mode instead of
LockStep mode. Update the K3 R5F remoteproc bindings with the compatible
info relevant to these R5F clusters/subsystems on K3 AM64x SoCs.
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suman Anna <s-anna@ti.com>
Link: https://lore.kernel.org/r/20210327143117.1840-2-s-anna@ti.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
processor subsystems/clusters (R5FSS). The dual core cluster can be used
either in a LockStep mode providing safety/fault tolerance features or in a
Split mode providing two individual compute cores for doubling the compute
processor subsystems/clusters (R5FSS). The dual core cluster can be used
either in a LockStep mode providing safety/fault tolerance features or in a
Split mode providing two individual compute cores for doubling the compute
- capacity. These are used together with other processors present on the SoC
- to achieve various system level goals.
+ capacity on most SoCs. These are used together with other processors present
+ on the SoC to achieve various system level goals.
+
+ AM64x SoCs do not support LockStep mode, but rather a new non-safety mode
+ called "Single-CPU" mode, where only Core0 is used, but with ability to use
+ Core1's TCMs as well.
Each Dual-Core R5F sub-system is represented as a single DTS node
representing the cluster, with a pair of child DT nodes representing
Each Dual-Core R5F sub-system is represented as a single DTS node
representing the cluster, with a pair of child DT nodes representing
- ti,am654-r5fss
- ti,j721e-r5fss
- ti,j7200-r5fss
- ti,am654-r5fss
- ti,j721e-r5fss
- ti,j7200-r5fss
power-domains:
description: |
power-domains:
description: |
ti,cluster-mode:
$ref: /schemas/types.yaml#/definitions/uint32
ti,cluster-mode:
$ref: /schemas/types.yaml#/definitions/uint32
description: |
Configuration Mode for the Dual R5F cores within the R5F cluster.
description: |
Configuration Mode for the Dual R5F cores within the R5F cluster.
- Should be either a value of 1 (LockStep mode) or 0 (Split mode),
- default is LockStep mode if omitted.
+ Should be either a value of 1 (LockStep mode) or 0 (Split mode) on
+ most SoCs (AM65x, J721E, J7200), default is LockStep mode if omitted;
+ and should be either a value of 0 (Split mode) or 2 (Single-CPU mode)
+ on AM64x SoCs, default is Split mode if omitted.
# R5F Processor Child Nodes:
# ==========================
# R5F Processor Child Nodes:
# ==========================
- ti,am654-r5f
- ti,j721e-r5f
- ti,j7200-r5f
- ti,am654-r5f
- ti,j721e-r5f
- ti,j7200-r5f
unevaluatedProperties: false
unevaluatedProperties: false
+if:
+ properties:
+ compatible:
+ enum:
+ - ti,am64-r5fss
+then:
+ properties:
+ ti,cluster-mode:
+ enum: [0, 2]
+else:
+ properties:
+ ti,cluster-mode:
+ enum: [0, 1]
+
required:
- compatible
- power-domains
required:
- compatible
- power-domains