linux-kernel - RE: [PATCH V4 3/6] ARM: dts: imx6sx-sabreauto: add IO expander max7310 support

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Date:   Thu, 26 Apr 2018 03:06:15 +0000
From:   Anson Huang <anson.huang@....com>
To:     Fabio Estevam <festevam@...il.com>
CC:     Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <kernel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        dl-linux-imx <linux-imx@....com>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH V4 3/6] ARM: dts: imx6sx-sabreauto: add IO expander
 max7310 support

Hi, Fabio

Anson Huang
Best Regards!


> -----Original Message-----
> From: Fabio Estevam [mailto:festevam@...il.com]
> Sent: Thursday, April 26, 2018 5:46 AM
> To: Anson Huang <anson.huang@....com>
> Cc: Shawn Guo <shawnguo@...nel.org>; Sascha Hauer
> <kernel@...gutronix.de>; Fabio Estevam <fabio.estevam@....com>; Rob
> Herring <robh+dt@...nel.org>; Mark Rutland <mark.rutland@....com>;
> Russell King - ARM Linux <linux@...linux.org.uk>; dl-linux-imx
> <linux-imx@....com>; moderated list:ARM/FREESCALE IMX / MXC ARM
> ARCHITECTURE <linux-arm-kernel@...ts.infradead.org>; open list:OPEN
> FIRMWARE AND FLATTENED DEVICE TREE BINDINGS
> <devicetree@...r.kernel.org>; linux-kernel <linux-kernel@...r.kernel.org>
> Subject: Re: [PATCH V4 3/6] ARM: dts: imx6sx-sabreauto: add IO expander
> max7310 support
> 
> On Wed, Apr 25, 2018 at 2:36 AM, Anson Huang <Anson.Huang@....com>
> wrote:
> 
> > +&i2c3 {
> > +       clock-frequency = <100000>;
> > +       pinctrl-names = "default";
> > +       pinctrl-0 = <&pinctrl_i2c3_2>;
> > +       status = "okay";
> > +
> > +       max7310_a: gpio@30 {
> > +               compatible = "maxim,max7310";
> > +               reg = <0x30>;
> > +               gpio-controller;
> > +               #gpio-cells = <2>;
> > +       };
> > +
> > +       max7310_b: gpio@32 {
> > +               compatible = "maxim,max7310";
> > +               reg = <0x32>;
> > +               gpio-controller;
> > +               #gpio-cells = <2>;
> > +       };
> 
> Please also add the users for the MAX7310 pins, such as Ethernet PHY.
 
MAX7310 pins are for PCIe, CAN, MLB. GPS etc., these modules are NOT enabled yet, so
I can NOT test it, I think we should add MAX7310 users when these modules are enabled,
ethernet PHY is NOT controlled by it.

Anson.