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Message-ID: <20181221095632.GC5023@lunn.ch>
Date: Fri, 21 Dec 2018 10:56:32 +0100
From: Andrew Lunn <andrew@...n.ch>
To: John Rama <john.rama01@...il.com>
Cc: netdev@...r.kernel.org
Subject: Re: dsa: how to set external PHY address of slave MDIO bus
On Thu, Dec 20, 2018 at 08:26:56PM -0500, John Rama wrote:
> Hi, Guys,
>
> I have one question. I'm working following configuration, and implementing a device driver.
> Basically, port 1-7 is working fine. I'm now having problem on port8.
>
> - System
> - i.MX6 and Marvel 88q5050 Switch(PHY addr is 0x10)
> - port1-5 has integrated PHY
> - port7 is connected to Marvel 88e1510 PHY(PHY addr is 0x1)
> - port8 is connected to Marvel 88e1510 PHY(PHY addr is 0x0),
> but it's the slave of MDIO bus whose master is the switch.
>
> 0x10
> +------------+ +-----------------+
> | | | Marvel 88q5050 |
> | | RGMII | port1 |
> | IMX6 +---------+ port6 |
> | | | port2 |
> | | MDIO | |
> | +-+-------+ port3 |
> | | | | |
> +------------+ | | port4 |
> | | |
> +-+-+ | port5 | +---+
> | |SGMII| |RGMII| |
> |PHY|-----| port7 port8 +-----+PHY+
> | | | |MDIO | |
> +---+ | +-----+ |
> Marvel 88e1510 +-----------------+ +---+
> 0x1 Marvel 88e1510
> 0x0
>
> - Question
> In the system above, how should we tell DSA driver the PHY address of the PHY which is connected to port8 ?
Hi John
Use a phy-handle in the port properties.
Andrew
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