From: Vivien Didelot <vivien.dide...@savoirfairelinux.com>
Date: Tue, 20 Jan 2015 19:13:32 -0500
> When registering a mdio bus, Linux assumes than every port has a PHY and tries
> to scan it. If a switch port has no PHY registered, DSA will fail to register
> the slave MII bus. To fix this, set the slave MII bus PHY mask to the switch
> PHYs mask.
>
> As an example, if we use a Marvell MV88E6352 (which is a 7-port switch with no
> registered PHYs for port 5 and port 6), with the following declared names:
>
> static struct dsa_chip_data switch_cdata = {
> [...]
> .port_names[0] = "sw0",
> .port_names[1] = "sw1",
> .port_names[2] = "sw2",
> .port_names[3] = "sw3",
> .port_names[4] = "sw4",
> .port_names[5] = "cpu",
> };
>
> DSA will fail to create the switch instance. With the PHY mask set for the
> slave MII bus, only the PHY for ports 0-4 will be scanned and the instance
> will
> be successfully created.
>
> Signed-off-by: Vivien Didelot <vivien.dide...@savoirfairelinux.com>
Applied.
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