linux-kernel - [PATCH v3 10/19] dt-bindings: hwmon: (mr75203) add "moortec,vm-pre-scaler" property

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Message-ID: <20220830192212.28570-11-farbere@amazon.com>
Date:   Tue, 30 Aug 2022 19:22:03 +0000
From:   Eliav Farber <farbere@...zon.com>
To:     <jdelvare@...e.com>, <linux@...ck-us.net>, <robh+dt@...nel.org>,
        <p.zabel@...gutronix.de>, <rtanwar@...linear.com>,
        <linux-hwmon@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <farbere@...zon.com>, <talel@...zon.com>, <hhhawa@...zon.com>,
        <jonnyc@...zon.com>, <hanochu@...zon.com>, <ronenk@...zon.com>,
        <itamark@...zon.com>, <shellykz@...zon.com>, <shorer@...zon.com>,
        <amitlavi@...zon.com>, <almogbs@...zon.com>, <dkl@...zon.com>,
        <rahul.tanwar@...ux.intel.com>, <andriy.shevchenko@...el.com>
Subject: [PATCH v3 10/19] dt-bindings: hwmon: (mr75203) add "moortec,vm-pre-scaler" property

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

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

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

Signed-off-by: Eliav Farber <farbere@...zon.com>
---
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    | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Documentation/devicetree/bindings/hwmon/moortec,mr75203.yaml b/Documentation/devicetree/bindings/hwmon/moortec,mr75203.yaml
index 69cc6caceb2c..4c983d8f8fe7 100644
--- a/Documentation/devicetree/bindings/hwmon/moortec,mr75203.yaml
+++ b/Documentation/devicetree/bindings/hwmon/moortec,mr75203.yaml
@@ -54,6 +54,16 @@ properties:
     default: 16
     $ref: /schemas/types.yaml#definitions/uint8-array
 
+  moortec,vm-pre-scaler:
+    description:
+      moortec,vm-pre-scaler property is an array of channels that use a mr76006
+      pre-scaler to divides 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 the actual value
+      of the voltage source.
+    default: 1
+    $ref: /schemas/types.yaml#definitions/uint8-array
+
 required:
   - compatible
   - reg
@@ -76,5 +86,6 @@ examples:
         clocks = <&osc0>;
         resets = <&rcu0 0x40 7>;
         moortec,vm-active-channels = <0x10 0x05>;
+        moortec,vm-pre-scaler = <5 6>;
         #thermal-sensor-cells = <1>;
     };
-- 
2.37.1