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mv643xx_eth: add PHY-less mode
On some boards, the mv643xx_eth MAC isn't connected to a PHY but directly (via the MII/GMII/RGMII interface) to another MAC-layer device. This patch allows specifying ->phy_addr = -1 to skip all PHY-related initialisation and run-time poking in that case. Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Acked-by: Dale Farnsworth <dale@farnsworth.org>
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