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Date:   Sat, 20 Feb 2021 20:19:14 +0100
From:   Krzysztof Kozlowski <krzk@kernel.org>
To:     Adrien Grassein <adrien.grassein@gmail.com>
Cc:     Rob Herring <robh+dt@kernel.org>, Shawn Guo <shawnguo@kernel.org>,
        Sascha Hauer <s.hauer@pengutronix.de>,
        Sascha Hauer <kernel@pengutronix.de>,
        Fabio Estevam <festevam@gmail.com>,
        dl-linux-imx <linux-imx@nxp.com>, catalin.marinas@arm.com,
        will@kernel.org, DTML <devicetree@vger.kernel.org>,
        linux-arm-kernel@lists.infradead.org,
        linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 1/8] arm64: dts: imx8mm-nitrogen-r2: add wifi/bt chip
Message-ID: <20210220191914.pir3ep3utz6uwyrb@kozik-lap>
References: <20210217161052.877877-1-adrien.grassein@gmail.com>
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On Fri, Feb 19, 2021 at 03:03:55PM +0100, Adrien Grassein wrote:
> Le ven. 19 févr. 2021 à 14:18, Krzysztof Kozlowski <krzk@kernel.org> a écrit :
> >
> > On Wed, Feb 17, 2021 at 05:10:45PM +0100, Adrien Grassein wrote:
> > > Add usdhc3 description which corresponds to the wifi/bt chip
> > >
> > > Signed-off-by: Adrien Grassein <adrien.grassein@gmail.com>
> > > ---
> > >  .../boot/dts/freescale/imx8mm-nitrogen-r2.dts | 31 +++++++++++++++++++
> > >  1 file changed, 31 insertions(+)
> > >
> > > diff --git a/arch/arm64/boot/dts/freescale/imx8mm-nitrogen-r2.dts b/arch/arm64/boot/dts/freescale/imx8mm-nitrogen-r2.dts
> > > index c0c384d76147..212dc9e5e85d 100644
> > > --- a/arch/arm64/boot/dts/freescale/imx8mm-nitrogen-r2.dts
> > > +++ b/arch/arm64/boot/dts/freescale/imx8mm-nitrogen-r2.dts
> > > @@ -9,6 +9,17 @@
> > >  / {
> > >       model = "Boundary Devices i.MX8MMini Nitrogen8MM Rev2";
> > >       compatible = "boundary,imx8mm-nitrogen8mm", "fsl,imx8mm";
> > > +
> > > +     reg_wlan_vmmc: regulator-wlan-vmmc {
> > > +             compatible = "regulator-fixed";
> > > +             pinctrl-names = "default";
> > > +             pinctrl-0 = <&pinctrl_reg_wlan_vmmc>;
> > > +             regulator-name = "reg_wlan_vmmc";
> > > +             regulator-min-microvolt = <3300000>;
> > > +             regulator-max-microvolt = <3300000>;
> > > +             gpio = <&gpio3 20 GPIO_ACTIVE_HIGH>;
> > > +             enable-active-high;
> > > +     };
> > >  };
> > >
> > >  &A53_0 {
> > > @@ -206,6 +217,20 @@ &usdhc2 {
> > >       status = "okay";
> > >  };
> > >
> > > +/* wlan */
> > > +&usdhc3 {
> > > +     bus-width = <4>;
> > > +     sdhci-caps-mask = <0x2 0x0>;
> > > +     non-removable;
> > > +     pinctrl-names = "default", "state_100mhz", "state_200mhz";
> > > +     pinctrl-0 = <&pinctrl_usdhc3>;
> > > +     pinctrl-1 = <&pinctrl_usdhc3_100mhz>;
> > > +     pinctrl-2 = <&pinctrl_usdhc3_200mhz>;
> > > +     vmmc-supply = <&reg_wlan_vmmc>;
> > > +     vqmmc-1-8-v;
> >
> > There is no such property in the bindings.
> >
> 
> Sorry, I copied a property from the FSL kernel.
> I will fix this with a "fixed-regulator".

I would assume this goes from PMIC, so check your schematics. There is
little point in adding a fixed regulator which is non-controllable.
I think bindings don't require it.

Best regards,
Krzysztof