Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 64 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/iio/dac/dpot-dac.yaml b/Documentation/devicetree/bindings/iio/dac/dpot-dac.yaml
new file mode 100644
index 000000000..6a7ca8e43
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/dpot-dac.yaml
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/dac/dpot-dac.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: DAC emulation using a digital potentiometer
+
+maintainers:
+  - Peter Rosin <peda@axentia.se>
+
+description: |
+  It is assumed that the dpot is used as a voltage divider between the
+  current dpot wiper setting and the maximum resistance of the dpot. The
+  divided voltage is provided by a vref regulator.
+
+                  .------.
+   .-----------.  |      |
+   | vref      |--'    .---.
+   | regulator |--.    |   |
+   '-----------'  |    | d |
+                  |    | p |
+                  |    | o |  wiper
+                  |    | t |<---------+
+                  |    |   |
+                  |    '---'       dac output voltage
+                  |      |
+                  '------+------------+
+
+properties:
+  compatible:
+    const: dpot-dac
+
+  vref-supply:
+    description: Regulator supplying the voltage divider.
+
+  io-channels:
+    maxItems: 1
+    description: |
+      Channel node of the dpot to be used for the voltage division.
+
+  io-channel-names:
+    const: dpot
+
+  "#io-channel-cells":
+    const: 1
+
+required:
+  - compatible
+  - vref-supply
+  - io-channels
+  - io-channel-names
+
+additionalProperties: false
+
+examples:
+  - |
+    dac {
+        compatible = "dpot-dac";
+        vref-supply = <&reg_3v3>;
+        io-channels = <&dpot 0>;
+        io-channel-names = "dpot";
+    };
+...