On Mon, Nov 14, 2022 at 12:11:43PM +0800, Xiaolei Wang wrote:
> On imx6sx, there are two fec interfaces, but the external
> phys can only be configured by fec0 mii_bus. That means
> the fec1 can't work independently, it only work when the
> fec0 is active. It is alright in the normal boot since the
> fec0 will be probed first. But then the fec0 maybe moved
> behind of fec1 in the dpm_list due to various device link.
> So in system suspend and resume, we would get the following
> warning when configuring the external phy of fec1 via the
> fec0 mii_bus due to the inactive of fec0. In order to fix
> this issue, we create a device link between fec0 and fec1.
> This will make sure that fec0 is always active when fec1
> is in active mode.
I'm wondering if this should be more generic? I have seen this setup
more frequently on the FEC, but there are other dual MAC SoCs which
can have a similar setup, two PHYs sharing one MDIO bus.
Can this be pushed into phylib?
Andrew
