bus: fsl-mc: drop the fwnode links of the dpmacs nodes

A DPMAC node under dpmacs/ is never the fwnode of any device:
  the fsl-mc bus creates dpmac.N objects without one,
  then dpaa2-mac finds its node in dpmacs/ at connect time.

fw_devlink therefore attaches the supplier links of those nodes (phys, ...)
to the nearest ancestor device, the fsl-mc bus, as SYNC_STATE_ONLY proxies.

device_link_add() refuses such a link once the consumer has probed, and
fw_devlink logs the refusal as an error.

On an LX2160A board with 4x25G DPMACs for which phys = <&serdes_1 N>,
the Serdes PHY binds after the bus and then at every boot it shows:

  fsl_mc_bus 80c000000.fsl-mc: Failed to create device link (0x180) with supplier 1ea0000.phy for /soc/fsl-mc@80c000000/dpmacs/ethernet@3

once per port!

To fix it, when the root MC bus probes, purge the fwnode links of every
child of its dpmacs node, so fw_devlink has no supplier link left to
proxy to the bus and no longer tries to create those device links.

Signed-off-by: Vincent Jardin <vjardin@free.fr>
Reviewed-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Tested-by: Ioana Ciornei <ioana.ciornei@nxp.com> # LX2160ARDB
Link: https://lore.kernel.org/r/20260930-for-upstream-fsl-mc-dpmac-fwnode-links-v2-1-13f7b6ef000f@free.fr
Signed-off-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org>

0 files changed, 0 insertions, 0 deletions