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Message-ID: <f8fdc8d7-6ac5-5e20-10ef-7417d79c1b91@roeck-us.net>
Date:   Wed, 26 Jul 2023 09:16:15 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Carsten Spieß <mail@...sten-spiess.de>,
        Jean Delvare <jdelvare@...e.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>
Cc:     linux-hwmon@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org
Subject: Re: [PATCH 2/2] dt-bindings: hwmon: add renesas,isl28022

On 7/26/23 08:22, Carsten Spieß wrote:
> Add dt-bindings for Renesase ISL28022 power monitor.
> 
> Signed-off-by: Carsten Spieß <mail@...sten-spiess.de>
> ---
>   .../bindings/hwmon/renesas,isl28022.yaml      | 67 +++++++++++++++++++
>   MAINTAINERS                                   |  1 +
>   2 files changed, 68 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/hwmon/renesas,isl28022.yaml
> 
> diff --git a/Documentation/devicetree/bindings/hwmon/renesas,isl28022.yaml b/Documentation/devicetree/bindings/hwmon/renesas,isl28022.yaml
> new file mode 100644
> index 000000000000..5ecf892db269
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwmon/renesas,isl28022.yaml
> @@ -0,0 +1,67 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +
> +$id: http://devicetree.org/schemas/hwmon/renesas,isl28022.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Renesas ISL28022 power monitor
> +
> +maintainers:
> +  - Carsten Spieß <mail@...sten-spiess.de>
> +
> +description: |
> +  The ISL28022 is a power monitor with I2C interface. The device monitors
> +  voltage, current via shunt resistor and calculated power.
> +
> +  Datasheets:
> +    https://www.renesas.com/us/en/www/doc/datasheet/isl28022.pdf
> +
> +Required properties:
> +  compatible:
> +    enum:
> +      - renesas,isl28022
> +
> +  reg:
> +    maxItems: 1
> +
> +Optional properties:
> +  shunt-resistor-micro-ohms:
> +    description:
> +      Shunt resistor value in micro-Ohm
> +      defaults to <0> when not set
> +      monitoring of current and power not supported when <0>
> +

Should not default to 0 (disabled).

> +  shunt-gain:
> +    description:
> +      Shunt gain to scale maximal shunt voltage to
> +      40mV, 80mV, 160mV, 320mV
> +      defaults to <8> (320mV) when not set
> +    enum: [1, 2, 4, 8]
> +
> +  average:
> +    description: |
> +      Number of samples to be used to report voltage, current and power values.
> +      defaults to <0> when not set
> +    enum: [0, 1, 2, 4, 8, 16, 32, 64, 128]

Should not default to 0 (disabled).

> +
> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        power-monitor@40 {
> +            compatible = "renesas,isl28022";
> +            reg = <0x10>;
> +            shunt-resistor-micro-ohms = <8000>;
> +            shunt-gain = <1>;
> +            average = <128>;
> +        };
> +    };
> diff --git a/MAINTAINERS b/MAINTAINERS
> index c61aa688cd11..ec9b97ace50b 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -11076,6 +11076,7 @@ ISL28022 HARDWARE MONITORING DRIVER
>   M:	Carsten Spieß <mail@...sten-spiess.de>
>   L:	linux-hwmon@...r.kernel.org
>   S:	Maintained
> +F:	Documentation/devicetree/bindings/hwmon/renesas,isl28022.yaml
>   F:	Documentation/hwmon/isl28022.rst
>   F:	drivers/hwmon/isl28022.c
>   

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