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Date: Mon, 17 Nov 2014 17:09:34 +0100 From: Andrew Lunn <andrew@...n.ch> To: Oliver Graute <oliver.graute@...il.com> Cc: netdev@...r.kernel.org, andrew@...n.ch, Florian Fainelli <f.fainelli@...il.com>, buytenh@...tstofly.org Subject: Re: Device Tree Binding for Marvell DSA Switch on imx28 board over Mdio Interface > dsa@0 { > compatible = "marvell,dsa"; > #address-cells = <2>; > #size-cells = <0>; > > interrupts = <10>; > //dsa,ethernet = <ðphy1>; > //dsa,ethernet = <ð1>; > 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 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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