[v4,14/21] dt-bindings: hwmon: (mr75203) add "moortec,vm-pre-scaler-x2" property

Commit Message

Farber, Eliav Sept. 6, 2022, 8:33 a.m. UTC

Add support for mr76006 pre-scaler which provides divide-by-2 scaling of
the input voltage, so that it can be  presented to the VM for measurement
within its range (the VM input range is limited to -0.1V to 1V).

The new "moortec,vm-pre-scaler-x2" property lists the channels that use
the mr76006 pre-scaler.

The driver will use this list to multiply the voltage result by 2, to
present to the user with the actual voltage input source.

Signed-off-by: Eliav Farber <[e-mail]>
---
V4 -> V3:
- Rename "moortec,vm-pre-scaler" to "moortec,vm-pre-scaler-x2".
- Added mximum number if items in description.

V3 -> V2:
- Add "moortec" prefix to property name.
- Change property format to be a single u8 array.
- Fix typo: scalar --> scaler.

 .../devicetree/bindings/hwmon/moortec,mr75203.yaml  | 13 +++++++++++++
 1 file changed, 13 insertions(+)

Patch

diff --git a/Documentation/devicetree/bindings/hwmon/moortec,mr75203.yaml b/Documentation/devicetree/bindings/hwmon/moortec,mr75203.yaml
index 2aa4c3618596..de92a21d5552 100644
--- a/Documentation/devicetree/bindings/hwmon/moortec,mr75203.yaml
+++ b/Documentation/devicetree/bindings/hwmon/moortec,mr75203.yaml
@@ -79,6 +79,18 @@  properties:
       Minimum value of each item - 0 (which means entire VM sensor is nou used).
     $ref: /schemas/types.yaml#/definitions/uint8-array
 
+  moortec,vm-pre-scaler-x2:
+    description:
+      Defines the channels that use a mr76006 pre-scaler to divide the input
+      source by 2.
+      The pre-scaler is used for input sources that exceed the VM input range.
+      The driver uses this information to present to the user with the actual
+      value of the voltage source.
+      For channels that are not listed, no pre-scaler is assumed.
+      Maximum number of items - total number of channels in all VMs.
+      Each channel should not appear more than once.
+    $ref: /schemas/types.yaml#/definitions/uint8-array
+
 required:
   - compatible
   - reg
@@ -101,5 +113,6 @@  examples:
         clocks = <&osc0>;
         resets = <&rcu0 0x40 7>;
         moortec,vm-active-channels = /bits/ 8 <0x10 0x05>;
+        moortec,vm-pre-scaler-x2 = /bits/ 8 <5 6 20>;
         #thermal-sensor-cells = <1>;
     };