netdev - Re: fec driver and two micrel phys

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Date:   Wed, 29 Nov 2017 08:29:49 +0100
From:   Oliver Graute <oliver.graute@...il.com>
To:     netdev@...r.kernel.org
Subject: Re: fec driver and two micrel phys

On 28/11/17, Andrew Lunn wrote:
> On Tue, Nov 28, 2017 at 04:28:15PM +0100, Oliver Graute wrote:
> > Hello list,
> > 
> > I try to get two Micrel KSZ8041 Phys working with the fec driver from
> > Kernel 4.14. But it looks that something with the mii_bus probing is not
> > working here. I expect the Phys on address 01 and 03. Currently on eth1
> > I see TX traffic but no RX. On eth0 there is neither nor. (ifconfig)
> > 
> > [   51.997034] Micrel KSZ8041 800f0000.ethernet-1:00: attached PHY driver [Micrel KSZ8041] (mii_bus:phy_addr=800f0000.ethernet-1:00, irq=POLL)
> > [   52.036719] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> > [   52.621138] Micrel KSZ8041 800f0000.ethernet-1:01: attached PHY driver [Micrel KSZ8041] (mii_bus:phy_addr=800f0000.ethernet-1:01, irq=POLL)
> > [   52.649677] IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready
> > [   54.697479] fec 800f4000.ethernet eth1: Link is Up - 100Mbps/Full - flow control off
> > [   54.721424] IPv6: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
> > [   59.860693] Micrel KSZ8041 800f0000.ethernet-1:00: attached PHY driver [Micrel KSZ8041] (mii_bus:phy_addr=800f0000.ethernet-1:00, irq=POLL)
> > [   59.874298] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> > [   59.980688] Micrel KSZ8041 800f0000.ethernet-1:01: attached PHY driver [Micrel KSZ8041] (mii_bus:phy_addr=800f0000.ethernet-1:01, irq=POLL)
> > [   59.994289] IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready
> > [   62.025331] fec 800f4000.ethernet eth1: Link is Up - 100Mbps/Full - flow control off
> > [   62.044588] IPv6: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
> > 
> > 
> > On my old setup with an Kernel 4.2 the phys are working. But there I
> > patched the phy_mask into the old fec code. Because I didn't know how to
> > do it better by device tree.
> > 
> > Can someone tell my how to do it right?
> 
> Hi Oliver
> 
> Can you show use your device tree? You should be using phy-handle to
> point to the PHYs on the MDIO bus.

here is my device tree setting (derived from imx28-evk.dts):

&mac0 {
	phy-mode = "rmii";
	pinctrl-names = "default";
	pinctrl-0 = <&mac0_pins_a>;
	phy-reset-gpios = <&gpio4 13 0>;
	phy-reset-duration = <100>;
	status = "okay";
};

&mac1 {
	phy-mode = "rmii";
	pinctrl-names = "default";
	pinctrl-0 = <&mac1_pins_a>;
	status = "okay";
};

Best Regards,

Oliver