linux-kernel - Re: [PATCH 1/8] arm64: dts: imx8mm-nitrogen-r2: add wifi/bt chip

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Message-ID: <CABkfQAGyushYbaYkmfGdNjw3Ssaw7DgLJ5iomJPtRdHS0Rbobg@mail.gmail.com>
Date:   Wed, 17 Feb 2021 15:43:26 +0100
From:   Adrien Grassein <adrien.grassein@...il.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Rob Herring <robh+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Sascha Hauer <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>, catalin.marinas@....com,
        will@...nel.org, DTML <devicetree@...r.kernel.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/8] arm64: dts: imx8mm-nitrogen-r2: add wifi/bt chip

Hello,

Thanks for your review and your time.

Le mer. 17 févr. 2021 à 12:58, Krzysztof Kozlowski <krzk@...nel.org> a écrit :
>
> On Tue, Feb 16, 2021 at 12:19:36AM +0100, Adrien Grassein wrote:
> > Add usdhc3 description which corresponds to the wifi/bt chip
> >
> > Signed-off-by: Adrien Grassein <adrien.grassein@...il.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..bf20a40bcda0 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8mm-nitrogen-r2.dts
> > +++ b/arch/arm64/boot/dts/freescale/imx8mm-nitrogen-r2.dts
> > @@ -9,6 +9,18 @@
> >  / {
> >       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;
> > +             startup-delay-us = <70000>;
>
> That's quite a startup time... and it happens is the same as in bindings
> example. Do you really need it or it was just copied?
>
> I actually don't mind it, just poking at various things. :)
>

It was a copy/paste. I've just retested without this, it works.

> > +     };
> >  };
> >
> >  &A53_0 {
> > @@ -206,6 +218,19 @@ &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>;
>
> What about vqmmc?
>

It was missing, thanks,

> Best regards,
> Krzysztof

Best regards,
Adrien