linux-kernel - Re: [PATCH v6 3/3] arm64: dts: imx93: Add Engicam i.Core MX93 EDIMM 2.0 Starter Kit

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Date: Fri, 26 Apr 2024 18:08:12 +0200
From: Fabio Aiuto <fabio.aiuto@...icam.com>
To: Michael Nazzareno Trimarchi <michael@...rulasolutions.com>
Cc: Fabio Estevam <festevam@...il.com>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Rob Herring <robh@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
	devicetree@...r.kernel.org, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Matteo Lisi <matteo.lisi@...icam.com>,
	Mirko Ardinghi <mirko.ardinghi@...icam.com>,
	Peng Fan <peng.fan@....com>
Subject: Re: [PATCH v6 3/3] arm64: dts: imx93: Add Engicam i.Core MX93 EDIMM
 2.0 Starter Kit

Hello Michael,

Il Fri, Apr 26, 2024 at 05:59:39PM +0200, Michael Nazzareno Trimarchi ha scritto:
> Hi
> 
> On Fri, Apr 26, 2024 at 5:56 PM Fabio Estevam <festevam@...il.com> wrote:
> >
> > Hi Fabio,
> >
> > On Fri, Apr 26, 2024 at 12:31 PM Fabio Aiuto <fabio.aiuto@...icam.com> wrote:
> >
> > > +&usdhc3 { /* WiFi */
> > > +       #address-cells = <1>;
> > > +       #size-cells = <0>;
> > > +       pinctrl-names = "default", "state_100mhz", "state_200mhz";
> > > +       pinctrl-0 = <&pinctrl_usdhc3>;
> > > +       pinctrl-1 = <&pinctrl_usdhc3>;
> > > +       pinctrl-2 = <&pinctrl_usdhc3>;
> > > +       mmc-pwrseq = <&usdhc3_pwrseq>;
> > > +       bus-width = <4>;
> > > +       no-1-8-v;
> > > +       non-removable;
> > > +       max-frequency = <25000000>;
> >
> > Is this 25MHz limitation correct?
> 
> This make the wifi a bit slow ;). You should be able to go to ~50Mhz at
> 3.3v. BTW the other mux
> are not needed "state_100mhz", "state_200mhz";
> 
> Sorry both Fabio, I did not see before
> 
> Michael

thanks for your comment, will get in touch with my colleagues
on monday, then I will give a feedback.

kr,

fabio

> 
> 
> Michael
> 
> 
> 
> 
> --
> Michael Nazzareno Trimarchi
> Co-Founder & Chief Executive Officer
> M. +39 347 913 2170
> michael@...rulasolutions.com
> __________________________________
> 
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