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From: Andrew Lunn <andrew@lunn.ch>
To: Oliver Graute <oliver.graute@gmail.com>
Cc: netdev@vger.kernel.org, andrew@lunn.ch,
	Florian Fainelli <f.fainelli@gmail.com>,
	buytenh@wantstofly.org
Subject: Re: Device Tree Binding for Marvell DSA Switch on imx28 board over Mdio Interface
Date: Mon, 17 Nov 2014 17:09:34 +0100	[thread overview]
Message-ID: <20141117160934.GR2001@lunn.ch> (raw)
In-Reply-To: <CA+KjHfY13ynH4Zr5Cerhswo3eucj3DMwq0tZ5CQquT3yuxKv-Q@mail.gmail.com>

> dsa@0 {
>         compatible = "marvell,dsa";
>         #address-cells = <2>;
>         #size-cells = <0>;
> 
>         interrupts = <10>;
>         //dsa,ethernet = <&ethphy1>;
>         //dsa,ethernet = <&eth1>;
>         dsa,ethernet = <&mac1>;
>         //dsa,ethernet = <&mac0>;
>         dsa,mii-bus = <&mdio_bus>;
> 
>         switch@0 {
>             #address-cells = <1>;
>             #size-cells = <0>;
>             reg = <5 0>;   /* MDIO address 5, switch 0 in tree */

Hi Oliver

How do you have the strapping pins on the switch set? They determine
what address on the mdio bus the chip responds to.

Does your u-boot have commands to read arbitrary phy registers?
Generally, reading a register that does not exist gives 0xffff.  So
try some reads at different addresses and see what you can find.

    Andrew

  reply	other threads:[~2014-11-17 16:09 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-11-12 13:07 Device Tree Binding for Marvell DSA Switch on imx28 board over Mdio Interface Oliver Graute
2014-11-12 19:19 ` Florian Fainelli
2014-11-13 15:15   ` Oliver Graute
2014-11-13 20:03     ` Florian Fainelli
2014-11-14  7:39       ` Oliver Graute
2014-11-14 14:52         ` Oliver Graute
2014-11-14 17:09           ` Florian Fainelli
2014-11-17 15:58           ` Oliver Graute
2014-11-17 16:09             ` Andrew Lunn [this message]
2014-11-18  8:30               ` Oliver Graute
2014-11-18 18:23                 ` Florian Fainelli
2014-11-19  7:49                   ` Oliver Graute
2014-11-19 15:08                     ` Andrew Lunn
2014-11-17 16:45     ` Fabio Estevam
2014-11-17 16:54       ` Oliver Graute
2014-11-18  0:39         ` Fabio Estevam

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