linux-kernel - Re: [RFC PATCH 5/7] dt-bindings: regulator: bd9576 add FET ON-resistance for OCW

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Message-ID: <20210217213412.GA2800178@robh.at.kernel.org>
Date:   Wed, 17 Feb 2021 15:34:12 -0600
From:   Rob Herring <robh@...nel.org>
To:     Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
Cc:     mazziesaccount@...il.com, Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-power@...rohmeurope.com, linux-arm-msm@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org
Subject: Re: [RFC PATCH 5/7] dt-bindings: regulator: bd9576 add FET
 ON-resistance for OCW

On Thu, Feb 11, 2021 at 02:35:41PM +0200, Matti Vaittinen wrote:
> BD9576MUF provides over-current protection and detection. Current is
> measured as voltage loss over external FET. Allow specifying FET's on
> resistance so current monitoring limits can be converted to voltages.
> 
> Signed-off-by: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
> ---
>  .../devicetree/bindings/regulator/rohm,bd9576-regulator.yaml | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/regulator/rohm,bd9576-regulator.yaml b/Documentation/devicetree/bindings/regulator/rohm,bd9576-regulator.yaml
> index b6515a0cee62..ad3f57e9cd9b 100644
> --- a/Documentation/devicetree/bindings/regulator/rohm,bd9576-regulator.yaml
> +++ b/Documentation/devicetree/bindings/regulator/rohm,bd9576-regulator.yaml
> @@ -27,6 +27,11 @@ patternProperties:
>        Properties for single regulator.
>      $ref: "regulator.yaml#"
>  
> +    properties:
> +      rohm,ocw-fet-ron-milliohms:

We have '-ohms' and '-micro-ohms' already. Neither range works for you?

> +      description: External FET's ON-resistance. Required if VoutS1 OCP/OCW is
> +        to be set.
> +
>      required:
>        - regulator-name
>  
> -- 
> 2.25.4
> 
> 
> -- 
> Matti Vaittinen, Linux device drivers
> ROHM Semiconductors, Finland SWDC
> Kiviharjunlenkki 1E
> 90220 OULU
> FINLAND
> 
> ~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
> Simon says - in Latin please.
> ~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
> Thanks to Simon Glass for the translation =]