netdev - Re: Setting link down or up in software

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Date:   Fri, 13 Jan 2017 18:35:57 +0100
From:   Mason <slash.tmp@...e.fr>
To:     Zefir Kurtisi <zefir.kurtisi@...atec.com>,
        netdev <netdev@...r.kernel.org>
Cc:     Mans Rullgard <mans@...sr.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Thibaud Cornic <thibaud_cornic@...madesigns.com>
Subject: Re: Setting link down or up in software

On 13/01/2017 17:28, Zefir Kurtisi wrote:

> As for your specific problem: since I fought myself with the PHY/ETH subsystems
> over the past months, I might remember something relevant to your issue. Could you
> give some more info on your setup (PHY driver, opmode (SGMII, RGMII, etc.), ETH).

Hello Zefir,

My boards are using these drivers:

http://lxr.free-electrons.com/source/drivers/net/ethernet/aurora/nb8800.c
http://lxr.free-electrons.com/source/drivers/net/phy/at803x.c

The relevant device tree nodes are:

		eth0: ethernet@...00 {
			compatible = "sigma,smp8734-ethernet";
			reg = <0x26000 0x800>;
			interrupts = <38 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&clkgen SYS_CLK>;
		};

&eth0 {
	phy-connection-type = "rgmii";
	phy-handle = <&eth0_phy>;
	#address-cells = <1>;
	#size-cells = <0>;

	/* Atheros AR8035 */
	eth0_phy: ethernet-phy@4 {
		compatible = "ethernet-phy-id004d.d072",
			     "ethernet-phy-ieee802.3-c22";
		interrupts = <37 IRQ_TYPE_EDGE_RISING>;
		reg = <4>;
	};
};

If I comment the PHY "interrupts" property, then the PHY framework
falls back to polling.

Am I forgetting important information?

Regards.