[v18,03/16] dt-bindings: update risc-v cpu properties

Commit Message

Damien Le Moal Feb. 9, 2021, 12:30 p.m. UTC

The Canaan Kendryte K210 SoC CPU cores are based on a rocket chip
version using a draft verion of the RISC-V ISA specifications. To avoid
any confusion with CPU cores using stable specifications, add the
compatible string "canaan,k210" for this SoC CPU cores.

Also add the "riscv,none" value to the mmu-type property to allow a DT
to indicate that the CPU being described does not have an MMU or that
it has an MMU that is not usable (which is the case for the K210 SoC).

Cc: Paul Walmsley <[e-mail]>
Cc: Rob Herring <[e-mail]>
Cc: [e-mail]
Signed-off-by: Damien Le Moal <[e-mail]>
Reviewed-by: Atish Patra <[e-mail]>
Reviewed-by: Anup Patel <[e-mail]>
Acked-by: Rob Herring <[e-mail]>
---
 Documentation/devicetree/bindings/riscv/cpus.yaml | 2 ++
 1 file changed, 2 insertions(+)

Patch

diff --git a/Documentation/devicetree/bindings/riscv/cpus.yaml b/Documentation/devicetree/bindings/riscv/cpus.yaml
index eb6843f69f7c..e534f6a7cfa1 100644
--- a/Documentation/devicetree/bindings/riscv/cpus.yaml
+++ b/Documentation/devicetree/bindings/riscv/cpus.yaml
@@ -39,6 +39,7 @@  properties:
               - sifive,u74
               - sifive,u5
               - sifive,u7
+              - canaan,k210
           - const: riscv
       - const: riscv    # Simulator only
     description:
@@ -56,6 +57,7 @@  properties:
       - riscv,sv32
       - riscv,sv39
       - riscv,sv48
+      - riscv,none
 
   riscv,isa:
     description: