linux-kernel - Re: [PATCH v4 1/2] regulator: dt-bindings: rtq2208: Add Richtek RTQ2208 SubPMIC

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Message-ID: <20230720080728.GA10433@linuxcarl2.richtek.com>
Date:   Thu, 20 Jul 2023 16:07:28 +0800
From:   Alina Yu <alina_yu@...htek.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
CC:     <lgirdwood@...il.com>, <broonie@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <alina_yu@...htek.com>
Subject: Re: [PATCH v4 1/2] regulator: dt-bindings: rtq2208: Add Richtek
 RTQ2208 SubPMIC

Hi,
Krzysztof:

On Wed, Jul 19, 2023 at 11:44:45AM +0200, Krzysztof Kozlowski wrote:
> On 19/07/2023 11:24, alina_yu@...htek.com wrote:
> > From: alinayu <alina_yu@...htek.com>
> > 
> > Add bindings for Richtek RTQ2208 IC controlled SubPMIC
> > 
> > Signed-off-by: Alina Yu <alina_yu@...htek.com>
> > ---
> > v4
> > - Modify filename to "richtek,rtq2208"
> > - Add more desciptions for "regulator-allowed-modes"

...

> > +
> > +          regulator-mode:
> > +            enum: [0, 1]
> > +            description:
> > +              describe buck initial operating mode in suspend state.
> 
> There is no such property on this level. Aren't you mixing initial one?

It's the initial mode in suspend-mem state, should I modify that like this ?
        patternProperties:
          "^regulator-state-(standby|mem|disk)$":
	    type: object
	    $ref: regulator.yaml#
	    properties:
	      regulator-mode:
	        enum: [0, 1]
		description:
                  describe byck initial operating mode in suspend state.
...

> 
> > +            enum: [ 900000, 1200000, 1800000, 3300000 ]
> > +            description:
> > +              the fixed voltage in micro volt which is decided at the factory.
> 
> I don't understand this property. Why this is different from min/max


Because ldo has fixed voltage, so I thinks I could use a property to
represent the fixed voltage directly. Do you suggest me modifying that like this:

regulator-min-microvolt = <900000>;
regulator-max-microvolt = <900000>;

Using min voltage equals to max voltage to represent fixed voltage, instead of self-defined property ?


> microvolt? Plus, you use incorrect unit suffix.

if I change "richtek,fixed-uV" to "richtek, fixed-microvolt",
will it be a correct unit suffix ?

Best regards,
Alina