diff mbox series

[v1,2/2] dt-bindings: riscv: add a capacity-dmips-mhz cpu property

Message ID 20230104180513.1379453-3-conor@kernel.org
State New
Headers
Series dt-bindings: Add a cpu-capacity property for RISC-V |

Commit Message

Conor Dooley Jan. 4, 2023, 6:05 p.m. UTC 
  From: Conor Dooley <conor.dooley@microchip.com>

Since commit 03f11f03dbfe ("RISC-V: Parse cpu topology during boot.")
RISC-V has used the generic arch topology code, which provides for
disparate CPU capacities. We never defined a binding to acquire this
information from the DT though, so document the one already used by the
generic arch topology code: "capacity-dmips-mhz".

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
---
 Documentation/devicetree/bindings/riscv/cpus.yaml | 6 ++++++
 1 file changed, 6 insertions(+)

Comments

Ley Foon Tan Jan. 5, 2023, 1:55 a.m. UTC | #1 
> -----Original Message-----
> 
> From: Conor Dooley <conor.dooley@microchip.com>
> 
> Since commit 03f11f03dbfe ("RISC-V: Parse cpu topology during boot.") RISC-
> V has used the generic arch topology code, which provides for disparate CPU
> capacities. We never defined a binding to acquire this information from the
> DT though, so document the one already used by the generic arch topology
> code: "capacity-dmips-mhz".
> 
> Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
> ---
>  Documentation/devicetree/bindings/riscv/cpus.yaml | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/riscv/cpus.yaml
> b/Documentation/devicetree/bindings/riscv/cpus.yaml
> index c6720764e765..2480c2460759 100644
> --- a/Documentation/devicetree/bindings/riscv/cpus.yaml
> +++ b/Documentation/devicetree/bindings/riscv/cpus.yaml
> @@ -114,6 +114,12 @@ properties:
>        List of phandles to idle state nodes supported
>        by this hart (see ./idle-states.yaml).
> 
> +  capacity-dmips-mhz:
> +    description:
> +      u32 value representing CPU capacity (see ../cpu/cpu-capacity.txt) in
> +      DMIPS/MHz, relative to highest capacity-dmips-mhz
> +      in the system.
> +
>  required:
>    - riscv,isa
>    - interrupt-controller
> --
> 2.39.0

Thanks Conor.

Reviewed-by: Ley Foon Tan <leyfoon.tan@starfivetech.com>

Regards
Ley Foon
Rob Herring Jan. 8, 2023, 9:49 p.m. UTC | #2 
On Wed, 04 Jan 2023 18:05:14 +0000, Conor Dooley wrote:
> From: Conor Dooley <conor.dooley@microchip.com>
> 
> Since commit 03f11f03dbfe ("RISC-V: Parse cpu topology during boot.")
> RISC-V has used the generic arch topology code, which provides for
> disparate CPU capacities. We never defined a binding to acquire this
> information from the DT though, so document the one already used by the
> generic arch topology code: "capacity-dmips-mhz".
> 
> Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
> ---
>  Documentation/devicetree/bindings/riscv/cpus.yaml | 6 ++++++
>  1 file changed, 6 insertions(+)
> 

Acked-by: Rob Herring <robh@kernel.org>
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/riscv/cpus.yaml b/Documentation/devicetree/bindings/riscv/cpus.yaml
index c6720764e765..2480c2460759 100644
--- a/Documentation/devicetree/bindings/riscv/cpus.yaml
+++ b/Documentation/devicetree/bindings/riscv/cpus.yaml
@@ -114,6 +114,12 @@  properties:
       List of phandles to idle state nodes supported
       by this hart (see ./idle-states.yaml).
 
+  capacity-dmips-mhz:
+    description:
+      u32 value representing CPU capacity (see ../cpu/cpu-capacity.txt) in
+      DMIPS/MHz, relative to highest capacity-dmips-mhz
+      in the system.
+
 required:
   - riscv,isa
   - interrupt-controller