linux-kernel - Re: [PATCH v5] arm64: allwinner: h5: add support for NanoPi NEO Plus2

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Date:   Mon, 4 Sep 2017 16:26:19 +0200
From:   Antony Antony <antony@...nome.org>
To:     Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:     Antony Antony <antony@...nome.org>, Chen-Yu Tsai <wens@...e.org>,
        Icenowy Zheng <icenowy@...c.io>, linux-sunxi@...glegroups.com,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5] arm64: allwinner: h5: add support for NanoPi NEO Plus2

Hi Maxime,

On Mon, Sep 04, 2017 at 10:27:32AM +0200, Maxime Ripard wrote:
> On Fri, Sep 01, 2017 at 12:53:13PM +0200, Antony Antony wrote:
> > > > +&emac {
> > > > +	pinctrl-names = "default";
> > > > +	pinctrl-0 = <&emac_rgmii_pins>;
> > > > +	phy-supply = <&reg_gmac_3v3>;
> > > > +	phy-handle = <&ext_rgmii_phy>;
> > > > +	phy-mode = "rgmii";
> > > > +	status = "okay";
> > > > +};
> > > > +
> > > > +&mdio {
> > > > +	ext_rgmii_phy: ethernet-phy@7 {
> > > > +		compatible = "ethernet-phy-ieee802.3-c22";
> > > > +		reg = <7>;
> > > > +	};
> > > > +};
> > > 
> > > This will not compile.
> > 
> > I don't understand you, because, v5 file compiled for me. Here is output 
> > from running system, just the relevant part.  using dtc -I fs 
> > /proc/device-tree
> > 
> > ext_rgmii_phy = "/soc/ethernet@...0000/mdio/ethernet-phy@7";
> > 
> > ethernet@...0000 {
> > 	mdio {
> > 	..
> > 		ethernet-phy@7 {
> > 			compatible = "ethernet-phy-ieee802.3-c22";
> > 			phandle = <0x1c>;
> > 			reg = <0x7>;
> > 			linux,phandle = <0x1c>;
> > 		};
> > };
> > 
> > Is this what you expect?
> 
> The bindings have been reverted recently, so if you based your work on
> a version between 4.13-rc1 and 4.13-rc6 it will work, but anything
> more recent will not compile anymore.

I deleted emc and related node.
I see. I hope stmmac: sun8i come back soon. It works well well on this 
board, running 4.13-rc6

> > > > +	status = "okay";
> > > > +
> > > > +	/*
> > > > +	 * AMPAK AP6212A WiFi module with BCM43430, rev=1 inside
> > > > +	 * sdio vendor ID: 0x02d0, sdio device ID: 0xa9a6
> > > > +	 * There is no specific Documentation: dt-binding for BCM43430
> > > > +	 * brcm,bcm4329-fmac compatible can initialize this module
> > > > +	 */
> > > 
> > > This is not really relevant.
> > 
> > would you prefer no comment or a rewrite? How does this look?
> > 
> > /*
> >  * AMPAK AP6212A WiFi module with BCM43430, rev=1 inside
> >  * sdio vendor ID: 0x02d0, sdio device ID: 0xa9a6
> >  */
> > 
> > I am afraid a casual reader would think "brcm,bcm4329-fmac" is wrong, 
> > because that is not the actual chip inside the module.
> 
> No comment is fine, and I'm not sure the casual reader will ever read
> this :)

Deleted.

> > > > +&usb_otg {
> > > > +	dr_mode = "host";
> > > > +	status = "okay";
> > > > +};
> > > > +
> > > > +&usbphy {
> > > > +	/* USB Type-A ports' VBUS is always on */
> > > > +	usb0_id_det-gpios = <&pio 6 12 GPIO_ACTIVE_HIGH>; /* PG12 */
> > > 
> > > If it has an ID-detect pin, then it's not a host-only USB OTG
> > > controller. dr_mode should be set to otga 
> > 
> > good point. I don't see an ID-detect connected in the schematic. The 
> > previous generation had. 
> > 
> > I will leave 
> > &usb_otg {
> >   dr_mode = "host";
> >   status = "okay";
> > };
> > 
> > &usbphy {
> > 	/* USB Type-A ports' VBUS is always on */
> > 	status = "okay";
> > };
> 
> Looking at the schematics, it seems that the micro USB isn't even
> wired to a bus but is only used to power the board. If so, you can
> even remove the usb_otg node.

Yes, the Micro USB data pins are not connected. However, it there is a 
second USB A port connected to the processor. If I remove &usb_otg node, in 
4.13-rc6, the second port goes to disabled.

BTW would this work s/brcm,bcm4329-fmac/brcm/ or should I revert it?

I will send an updated version, v8, soon.

thanks,

-antony