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From:   Fabio Estevam <festevam@gmail.com>
Date:   Fri, 22 May 2020 07:24:59 -0300
Message-ID: <CAOMZO5Aiw+3N_o5+1g4nWWgsDQ5Yhdenumn04OhG6BwBy99EZg@mail.gmail.com>
Subject: Re: [PATCH v3 2/2] arm64: dts: imx8mn-ddr4-evk: correct ldo1/ldo2
 voltage range
To:     Robin Gong <yibin.gong@nxp.com>
Cc:     Rob Herring <robh+dt@kernel.org>, Shawn Guo <shawnguo@kernel.org>,
        Sascha Hauer <s.hauer@pengutronix.de>,
        Yongcai Huang <anson.huang@nxp.com>,
        Peng Fan <peng.fan@nxp.com>,
        Leonard Crestez <leonard.crestez@nxp.com>,
        Dong Aisheng <aisheng.dong@nxp.com>,
        Sascha Hauer <kernel@pengutronix.de>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@vger.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@lists.infradead.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        NXP Linux Team <linux-imx@nxp.com>
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On Thu, May 21, 2020 at 11:44 PM Robin Gong <yibin.gong@nxp.com> wrote:
>
> Correct ldo1 voltage range from wrong high group(3.0V~3.3V) to low group
> (1.6V~1.9V) because the ldo1 should be 1.8V. Actually, two voltage groups
> have been supported at bd718x7-regulator driver, hence, just corrrect the
> voltage range to 1.6V~3.3V. For ldo2@0.8V, correct voltage range too.
> Otherwise, ldo1 would be kept @3.0V and ldo2@0.9V which violate i.mx8mn
> datasheet as the below warning log in kernel:
>
> [    0.995524] LDO1: Bringing 1800000uV into 3000000-3000000uV
> [    0.999196] LDO2: Bringing 800000uV into 900000-900000uV
>
> Fixes: 3e44dd09736d ("arm64: dts: imx8mn-ddr4-evk: Add rohm,bd71847 PMIC support")
> Cc: stable@vger.kernel.org
> Signed-off-by: Robin Gong <yibin.gong@nxp.com>
> Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com>

Reviewed-by: Fabio Estevam <festevam@gmail.com>