From: Niklas Söderlund niklas.soderlund+renesas@ragnatech.se
[ Upstream commit 49bcb1506f2e095262c01bda7fd1c0db524c91e2 ]
When converting the thermal-zones bindings to yaml the definition of the contribution property changed. The intention is the same, an integer value expressing a ratio of a sum on how much cooling is provided by the device to the zone. But after the conversion the integer value is limited to the range 0 to 100 and expressed as a percentage.
This is problematic for two reasons.
- This do not match how the binding is used. Out of the 18 files that make use of the property only two (ste-dbx5x0.dtsi and ste-hrefv60plus.dtsi) sets it at a value that satisfy the binding, 100. The remaining 16 files set the value higher and fail to validate.
- Expressing the value as a percentage instead of a ratio of the sum is confusing as there is nothing to enforce the sum in the zone is not greater then 100.
This patch restore the pre yaml conversion description and removes the value limitation allowing the usage of the bindings to validate.
Fixes: 1202a442a31fd2e5 ("dt-bindings: thermal: Add yaml bindings for thermal zones") Reported-by: Kieran Bingham kieran.bingham+renesas@ideasonboard.com Signed-off-by: Niklas Söderlund niklas.soderlund+renesas@ragnatech.se Link: https://lore.kernel.org/r/20211109103045.1403686-1-niklas.soderlund+renesas@... Signed-off-by: Rob Herring robh@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- .../devicetree/bindings/thermal/thermal-zones.yaml | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/Documentation/devicetree/bindings/thermal/thermal-zones.yaml b/Documentation/devicetree/bindings/thermal/thermal-zones.yaml index 164f71598c595..1b3954aa71c15 100644 --- a/Documentation/devicetree/bindings/thermal/thermal-zones.yaml +++ b/Documentation/devicetree/bindings/thermal/thermal-zones.yaml @@ -199,12 +199,11 @@ patternProperties:
contribution: $ref: /schemas/types.yaml#/definitions/uint32 - minimum: 0 - maximum: 100 description: - The percentage contribution of the cooling devices at the - specific trip temperature referenced in this map - to this thermal zone + The cooling contribution to the thermal zone of the referred + cooling device at the referred trip point. The contribution is + a ratio of the sum of all cooling contributions within a + thermal zone.
required: - trip