From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:49:45 +0200
Subject: Adding upstream version 6.1.76.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../bindings/iio/afe/current-sense-shunt.yaml      | 68 ++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/afe/current-sense-shunt.yaml

(limited to 'Documentation/devicetree/bindings/iio/afe/current-sense-shunt.yaml')

diff --git a/Documentation/devicetree/bindings/iio/afe/current-sense-shunt.yaml b/Documentation/devicetree/bindings/iio/afe/current-sense-shunt.yaml
new file mode 100644
index 000000000..f8a112c9a
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/afe/current-sense-shunt.yaml
@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/afe/current-sense-shunt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Current Sense Shunt
+
+maintainers:
+  - Peter Rosin <peda@axentia.se>
+
+description: |
+  When an io-channel measures the voltage over a current sense shunt,
+  the interesting measurement is almost always the current through the
+  shunt, not the voltage over it. This binding describes such a current
+  sense circuit.
+
+properties:
+  compatible:
+    const: current-sense-shunt
+
+  io-channels:
+    maxItems: 1
+    description: |
+      Channel node of a voltage io-channel.
+
+  "#io-channel-cells":
+    const: 0
+
+  shunt-resistor-micro-ohms:
+    description: The shunt resistance.
+
+required:
+  - compatible
+  - io-channels
+  - shunt-resistor-micro-ohms
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        tiadc: adc@48 {
+            compatible = "ti,ads1015";
+            reg = <0x48>;
+            #io-channel-cells = <1>;
+
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            channel@0 { /* IN0,IN1 differential */
+                reg = <0>;
+                ti,gain = <1>;
+                ti,datarate = <4>;
+            };
+        };
+    };
+    sysi {
+        compatible = "current-sense-shunt";
+        io-channels = <&tiadc 0>;
+        #io-channel-cells = <0>;
+
+        /* Divide the voltage by 3300000/1000000 (or 3.3) for the current. */
+        shunt-resistor-micro-ohms = <3300000>;
+    };
+...
-- 
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