linux-kernel - [PATCH v4 07/13] dt-bindings: iio: temperature: ltc2983: require 4 wire rtd for current rotate

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Message-Id: <20221103130041.2153295-8-demonsingur@gmail.com>
Date:   Thu,  3 Nov 2022 15:00:35 +0200
From:   Cosmin Tanislav <demonsingur@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Lars-Peter Clausen <lars@...afoo.de>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Nuno Sá <nuno.sa@...log.com>,
        Jonathan Cameron <jic23@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Cosmin Tanislav <cosmin.tanislav@...log.com>
Subject: [PATCH v4 07/13] dt-bindings: iio: temperature: ltc2983: require 4 wire rtd for current rotate

From: Cosmin Tanislav <cosmin.tanislav@...log.com>

The driver will error out when current rotation is enabled but the RTD
is not 4-wire. Require it in the binding too.

Signed-off-by: Cosmin Tanislav <cosmin.tanislav@...log.com>
---
 .../bindings/iio/temperature/adi,ltc2983.yaml | 25 +++++++++++--------
 1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml b/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml
index bbac5f5cfbb3..b603219fb0c9 100644
--- a/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml
+++ b/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml
@@ -230,13 +230,6 @@ patternProperties:
           resistor is used for multiple 2-, 3-, and/or 4-wire RTDs.
         type: boolean
 
-      adi,current-rotate:
-        description:
-          Boolean property which enables excitation current rotation to
-          automatically remove parasitic thermocouple effects. Note that
-          this property is not allowed for 2- and 3-wire RTDs.
-        type: boolean
-
       adi,excitation-current-microamp:
         description:
           This property controls the magnitude of the excitation current
@@ -269,10 +262,22 @@ patternProperties:
     required:
       - adi,rsense-handle
 
-    dependencies:
-      adi,current-rotate: [ "adi,rsense-share" ]
-
     allOf:
+      - if:
+          properties:
+            adi,number-of-wires:
+              const: 4
+        then:
+          properties:
+            adi,current-rotate:
+              description:
+                Whether to enable excitation current rotation to automatically
+                remove parasitic thermocouple effects.
+              type: boolean
+
+          dependencies:
+            adi,current-rotate: [ "adi,rsense-share" ]
+
       - if:
           properties:
             adi,sensor-type:
-- 
2.38.1