[V8,18/21] dt-bindings: csky CPU Bindings

This patch adds the documentation to describe that how to add cpu nodes in
dts for SMP.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Cc: Rob Herring <robh@kernel.org>
---
 Documentation/devicetree/bindings/csky/cpus.txt | 70 +++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/csky/cpus.txt

On Fri, Oct 12, 2018 at 12:42:53PM +0800, Guo Ren wrote:
> This patch adds the documentation to describe that how to add cpu nodes in
> dts for SMP.
> 
> Signed-off-by: Guo Ren <ren_guo@c-sky.com>
> Cc: Rob Herring <robh@kernel.org>
> ---
>  Documentation/devicetree/bindings/csky/cpus.txt | 70 +++++++++++++++++++++++++
>  1 file changed, 70 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/csky/cpus.txt
> 
> diff --git a/Documentation/devicetree/bindings/csky/cpus.txt b/Documentation/devicetree/bindings/csky/cpus.txt
> new file mode 100644
> index 0000000..ee3901d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/csky/cpus.txt
> @@ -0,0 +1,70 @@
> +==================
> +C-SKY CPU Bindings
> +==================
> +
> +The device tree allows to describe the layout of CPUs in a system through
> +the "cpus" node, which in turn contains a number of subnodes (ie "cpu")
> +defining properties for every cpu.
> +
> +Only SMP system need to care about the cpus node and single processor
> +needn't define cpus node at all.
> +
> +=====================================
> +cpus and cpu node bindings definition
> +=====================================
> +
> +- cpus node
> +
> +        Description: Container of cpu nodes
> +
> +        The node name must be "cpus".
> +
> +        A cpus node must define the following properties:
> +
> +        - #address-cells
> +                Usage: required
> +                Value type: <u32>
> +                Definition: must be set to 1
> +        - #size-cells
> +                Usage: required
> +                Value type: <u32>
> +                Definition: must be set to 0
> +
> +- cpu node
> +
> +        Description: Describes one of SMP cores
> +
> +        PROPERTIES
> +

What happened to compatible?

> +        - device_type
> +                Usage: required
> +                Value type: <string>
> +                Definition: must be "cpu"
> +        - reg
> +                Usage: required
> +                Value type: <u32>
> +                Definition: CPU index
> +        - status:

Drop this. It is implied.

> +                Usage: required
> +                Value type: <string>
> +                Definition: "ok"       means enable  the cpu-core
> +                            "disabled" means disable the cpu-core
> +
> +Example:
> +--------
> +
> +	cpus {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +		cpu@0 {
> +			device_type = "cpu";
> +			reg = <0>;
> +			status = "ok";
> +		};
> +
> +		cpu@1 {
> +			device_type = "cpu";
> +			reg = <1>;
> +			status = "ok";
> +		};
> +	};
> -- 
> 2.7.4
>

On Fri, Oct 12, 2018 at 06:35:51AM -0500, Rob Herring wrote:
> On Fri, Oct 12, 2018 at 12:42:53PM +0800, Guo Ren wrote:
> > This patch adds the documentation to describe that how to add cpu nodes in
> > dts for SMP.
> > 
> > Signed-off-by: Guo Ren <ren_guo@c-sky.com>
> > Cc: Rob Herring <robh@kernel.org>
> > ---
> >  Documentation/devicetree/bindings/csky/cpus.txt | 70 +++++++++++++++++++++++++
> >  1 file changed, 70 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/csky/cpus.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/csky/cpus.txt b/Documentation/devicetree/bindings/csky/cpus.txt
> > new file mode 100644
> > index 0000000..ee3901d
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/csky/cpus.txt
> > @@ -0,0 +1,70 @@
> > +==================
> > +C-SKY CPU Bindings
> > +==================
> > +
> > +The device tree allows to describe the layout of CPUs in a system through
> > +the "cpus" node, which in turn contains a number of subnodes (ie "cpu")
> > +defining properties for every cpu.
> > +
> > +Only SMP system need to care about the cpus node and single processor
> > +needn't define cpus node at all.
> > +
> > +=====================================
> > +cpus and cpu node bindings definition
> > +=====================================
> > +
> > +- cpus node
> > +
> > +        Description: Container of cpu nodes
> > +
> > +        The node name must be "cpus".
> > +
> > +        A cpus node must define the following properties:
> > +
> > +        - #address-cells
> > +                Usage: required
> > +                Value type: <u32>
> > +                Definition: must be set to 1
> > +        - #size-cells
> > +                Usage: required
> > +                Value type: <u32>
> > +                Definition: must be set to 0
> > +
> > +- cpu node
> > +
> > +        Description: Describes one of SMP cores
> > +
> > +        PROPERTIES
> > +
> 
> What happened to compatible?
Opps ... I forgot it.

	- compatible:
		Usage: required
		Value type: <string>
		Definition: must contain "csky", eg:
			    "csky,610"
			    "csky,807"
			    "csky,810"
			    "csky,860"

> 
> > +        - device_type
> > +                Usage: required
> > +                Value type: <string>
> > +                Definition: must be "cpu"
> > +        - reg
> > +                Usage: required
> > +                Value type: <u32>
> > +                Definition: CPU index
> > +        - status:
> 
> Drop this. It is implied.
Ok, remove status.

Best Regards
 Guo Ren