netdev - Re: Ethernet not working on a different SoC with same eth HW

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Date:   Mon, 31 Oct 2016 16:48:15 +0100
From:   Mason <slash.tmp@...e.fr>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     netdev <netdev@...r.kernel.org>, Mans Rullgard <mans@...sr.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Timur Tabi <timur@...eaurora.org>,
        Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        Zefir Kurtisi <zefir.kurtisi@...atec.com>,
        Martin Blumenstingl <martin.blumenstingl@...il.com>,
        Uwe Kleine-Konig <u.kleine-koenig@...gutronix.de>,
        Daniel Mack <zonque@...il.com>,
        Sebastian Frias <sf84@...oste.net>
Subject: Re: Ethernet not working on a different SoC with same eth HW

On 31/10/2016 16:37, Andrew Lunn wrote:

>> The regnum=5,4,1,1,a,9 logs keep repeating, endlessly.
>> Is that expected?
> 
> Yes, that is expected, if you are not using interrupts. The phylib
> state machine polls the state of the PHY once per second to see if
> there has been a link up/down.

Interesting. But the logs are showing accesses much more frequent
than once per second, it seems... (?)

And an interrupt for the PHY is configured in the device tree:

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

	/* 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>;
	};
};

I'll add a log for the request_irq call.

Regards.