linux-kernel - Re: [PATCH v4 2/2] dt-bindings: hwmon: Add sample averaging properties for ADM1275

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <da4ac970-9e7d-c9cb-eea3-e5ec8a1eef00@kernel.org>
Date:   Tue, 1 Mar 2022 12:16:11 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Potin Lai <potin.lai@...ntatw.com>,
        Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Patrick Williams <patrick@...cx.xyz>, linux-hwmon@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v4 2/2] dt-bindings: hwmon: Add sample averaging
 properties for ADM1275

On 01/03/2022 11:39, Potin Lai wrote:
> Add documentation of new properties for sample averaging in PMON_CONFIG
> register.
> 
> New properties:
> - adi,volt-curr-sample-average
> - adi,power-sample-average
> - adi,power-sample-average-enable
> 
> Signed-off-by: Potin Lai <potin.lai@...ntatw.com>
> ---
>  .../bindings/hwmon/adi,adm1275.yaml           | 44 +++++++++++++++++++
>  1 file changed, 44 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/hwmon/adi,adm1275.yaml b/Documentation/devicetree/bindings/hwmon/adi,adm1275.yaml
> index 223393d7cafd..1b612dc06992 100644
> --- a/Documentation/devicetree/bindings/hwmon/adi,adm1275.yaml
> +++ b/Documentation/devicetree/bindings/hwmon/adi,adm1275.yaml
> @@ -37,6 +37,47 @@ properties:
>      description:
>        Shunt resistor value in micro-Ohm.
>  
> +  adi,volt-curr-sample-average:
> +    description: |
> +      Number of samples to be used to report voltage and current values.
> +      If the configured value is not a power of 2, sample averaging number
> +      will be configured with smaller and closest power of 2.
> +
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    enum: [1, 2, 4, 8, 16, 32, 64, 128]
> +    default: 1
> +
> +  adi,power-sample-average:
> +    description: |
> +      Number of samples to be used to report power values.
> +      If the configured value is not a power of 2, sample averaging number
> +      will be configured with smaller and closest power of 2.
> +
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    enum: [1, 2, 4, 8, 16, 32, 64, 128]
> +    default: 1
> +
> +  adi,power-sample-average-enable:
> +    description: Enable sample averaging for power reading.
> +    type: boolean

Why do you need this property? Voltage/current sampling is enabled in
your driver with presence of adi,volt-curr-sample-average. Why power
sampling is different?


Best regards,
Krzysztof