Re: [PATCH v2 1/2] dt-bindings: remoteproc: k3-r5f: Update bindings for AM64x SoCs

Mathieu Poirier
2021-05-21T20:41:00Z

Hi suman,

On Wed, May 12, 2021 at 09:47:44PM -0500, Suman Anna wrote:
> Hi Rob,
>
> On 4/19/21 8:55 AM, Suman Anna wrote:
> > Hi Rob,
> >
> > On 3/27/21 9:31 AM, Suman Anna wrote:
> >> 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.
> >>
> >> Signed-off-by: Suman Anna <s-anna@ti.com>
> >> ---
> >> v2: No changes
> >>
> >> .../bindings/remoteproc/ti,k3-r5f-rproc.yaml | 31 ++++++++++++++++---
> >
> > Looks like this patch has fallen through the cracks, can you please review and
> > give your ack for this patch so that Bjorn can pick up the series for 5.13?
>
> Gentle reminder, do you have any comments on this patch. Appreciate your ack so
> that we can get this in for 5.14?

If memory serves me well Rob indicated that he would not review or comment on
bindings related to multi-core remote processors. On the flip side he also
mentioned that he would not object to their presence. And since this is an
increment to an existing binding rather than a new one, I think it is fair for
us to pick it up.

Rob - please intervene if my recollections are not accurate and accept my honest
apologies. Otherwise:

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>

>
> regards
> Suman
>
> >
> > regards
> > Suman
> >
> >> 1 file changed, 26 insertions(+), 5 deletions(-)
> >>
> >> diff --git a/Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml b/Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml
> >> index d905d614502b..130fbaacc4b1 100644
> >> --- a/Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml
> >> +++ b/Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml
> >> @@ -14,8 +14,12 @@ description: |
> >> 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
> >> @@ -33,6 +37,7 @@ properties:
> >> - ti,am654-r5fss
> >> - ti,j721e-r5fss
> >> - ti,j7200-r5fss
> >> + - ti,am64-r5fss
> >>
> >> power-domains:
> >> description: |
> >> @@ -56,11 +61,12 @@ properties:
> >>
> >> ti,cluster-mode:
> >> $ref: /schemas/types.yaml#/definitions/uint32
> >> - enum: [0, 1]
> >> 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:
> >> # ==========================
> >> @@ -97,6 +103,7 @@ patternProperties:
> >> - ti,am654-r5f
> >> - ti,j721e-r5f
> >> - ti,j7200-r5f
> >> + - ti,am64-r5f
> >>
> >> reg:
> >> items:
> >> @@ -198,6 +205,20 @@ patternProperties:
> >>
> >> 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
> >>
> >
>