From: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
commit b60cf8e59e61133b6c9514ff8d8c8d7049d040ef upstream.
Fix device tree schema validation error messages for the SiFive
Unmatched: ' cache-sets:0:0: 1024 was expected'.
The existing bindings allow for just 1024 cache-sets but the fu740 on
Unmatched the has 2048 cache-sets. The ISA itself permits any arbitrary
power of two, however this is not supported by dt-schema. The RTL for
the IP, to which the number of cache-sets is a tunable parameter, has
been released publicly so speculatively adding a small number of
"reasonable" values seems unwise also.
Instead, as the binding only supports two distinct controllers: add 2048
and explicitly lock it to the fu740's l2 cache while limiting 1024 to
the l2 cache on the fu540.
Fixes: af951c3a113b ("dt-bindings: riscv: Update l2 cache DT documentation to add support for SiFive FU740")
Reported-by: Atul Khare <atulkhare@xxxxxxxxxxxx>
Signed-off-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/r/20220803185359.942928-1-mail@xxxxxxxxxxx
Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
Documentation/devicetree/bindings/riscv/sifive-l2-cache.yaml | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/Documentation/devicetree/bindings/riscv/sifive-l2-cache.yaml
+++ b/Documentation/devicetree/bindings/riscv/sifive-l2-cache.yaml
@@ -46,7 +46,7 @@ properties:
const: 2
cache-sets:
- const: 1024
+ enum: [1024, 2048]
cache-size:
const: 2097152
@@ -84,6 +84,8 @@ then:
description: |
Must contain entries for DirError, DataError and DataFail signals.
maxItems: 3
+ cache-sets:
+ const: 1024
else:
properties:
@@ -91,6 +93,8 @@ else:
description: |
Must contain entries for DirError, DataError, DataFail, DirFail signals.
minItems: 4
+ cache-sets:
+ const: 2048
additionalProperties: false
