linux-kernel - RE: [EXT] Re: [PATCH v1 3/3] arm64: dts: imx93-11x11-evk: add pca9451a support

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Message-ID: <AM6PR04MB59252C1614813A96577F1513E10AA@AM6PR04MB5925.eurprd04.prod.outlook.com>
Date:   Tue, 1 Aug 2023 10:17:11 +0000
From:   Joy Zou <joy.zou@....com>
To:     Mark Brown <broonie@...nel.org>
CC:     Jacky Bai <ping.bai@....com>,
        "lgirdwood@...il.com" <lgirdwood@...il.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        "conor+dt@...nel.org" <conor+dt@...nel.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [EXT] Re: [PATCH v1 3/3] arm64: dts: imx93-11x11-evk: add
 pca9451a support


> -----Original Message-----
> From: Mark Brown <broonie@...nel.org>
> Sent: 2023年5月31日 19:18
> To: Joy Zou <joy.zou@....com>
> Cc: Jacky Bai <ping.bai@....com>; lgirdwood@...il.com;
> robh+dt@...nel.org; krzysztof.kozlowski+dt@...aro.org; conor+dt@...nel.org;
> shawnguo@...nel.org; s.hauer@...gutronix.de; kernel@...gutronix.de;
> festevam@...il.com; dl-linux-imx <linux-imx@....com>;
> devicetree@...r.kernel.org; linux-arm-kernel@...ts.infradead.org;
> linux-kernel@...r.kernel.org
> Subject: Re: [PATCH v1 3/3] arm64: dts: imx93-11x11-evk: add pca9451a
> support
> 
> On Wed, May 31, 2023 at 02:57:24PM +0800, Joy Zou wrote:
> 
> > +		regulators {
> > +			buck1: BUCK1 {
> > +				regulator-name = "BUCK1";
> > +				regulator-min-microvolt = <650000>;
> > +				regulator-max-microvolt = <2237500>;
> 
> These look a lot like the maximum ranges the regulator supports which
> probably isn't what's safe for the board.
Sorry for late reply. Because my outlook filter rule has issue.
The maximum ranges is the PMIC support according to datasheet, but we don't use actually the maximum value, the actual use maximum value is 0.95V. So it's safe for the board.
Do you hope us to list only the voltage ranges actually used?
Thank you very much for your comments and efforts.
BR
Joy Zou