[PATCH v3 16/19] dt-bindings: hwmon: (mr75203) add coefficient properties for the thermal equation

Eliav Farber
2022-08-30T19:24:42Z

Add optional temperature coefficient properties:
*) moortec,ts-coeff-g
*) moortec,ts-coeff-h
*) moortec,ts-coeff-cal5
*) moortec,ts-coeff-j
If defined they shall be used instead of defaults.

The coefficients were added to device tree on top of the series property
(which can be used to select between series 5 and series 6), because
coefficients can vary between product and product, and code defaults might
not be accurate enough.

Signed-off-by: Eliav Farber <farbere@amazon.com>
---
V3 -> V2:
- Add "moortec" prefix to property name.

.../bindings/hwmon/moortec,mr75203.yaml | 33 +++++++++++++++++++
1 file changed, 33 insertions(+)

diff --git a/Documentation/devicetree/bindings/hwmon/moortec,mr75203.yaml b/Documentation/devicetree/bindings/hwmon/moortec,mr75203.yaml
index ec2dbe7da9c2..a92da6064285 100644
--- a/Documentation/devicetree/bindings/hwmon/moortec,mr75203.yaml
+++ b/Documentation/devicetree/bindings/hwmon/moortec,mr75203.yaml
@@ -74,6 +74,37 @@ properties:
default: 5
$ref: /schemas/types.yaml#definitions/uint32

+ moortec,ts-coeff-g:
+ description:
+ G coefficient for temperature equation.
+ Value should be multiplied by factor 1000.
+ Default for series 5 = 60000
+ Default for series 6 = 57400
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ moortec,ts-coeff-h:
+ description:
+ H coefficient for temperature equation.
+ Value should be multiplied by factor 1000.
+ Default for series 5 = 200000
+ Default for series 6 = 249400
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ moortec,ts-coeff-cal5:
+ description:
+ cal5 coefficient for temperature equation (can't be 0).
+ Default for series 5 = 4094
+ Default for series 6 = 4096
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ moortec,ts-coeff-j:
+ description:
+ J coefficient for temperature equation.
+ Value should be multiplied by factor 1000.
+ Default for series 5 = -100
+ Default for series 6 = 0
+ $ref: /schemas/types.yaml#/definitions/int32
+
required:
- compatible
- reg
@@ -97,5 +128,7 @@ examples:
resets = <&rcu0 0x40 7>;
moortec,vm-active-channels = <0x10 0x05>;
moortec,vm-pre-scaler = <5 6>;
+ moortec,ts-coeff-g = <61400>;
+ moortec,ts-coeff-h = <253700>;
#thermal-sensor-cells = <1>;
};
--
2.37.1