target/linux/generic/pending-5.15/795-mt7530-register-OF-node-for-internal-MDIO-bus.patch

   1 From 1d81e51d6d79d9098013b2e8cdd677bae998c5d8 Mon Sep 17 00:00:00 2001
   2 From: David Bauer <mail@david-bauer.net>
   3 Date: Fri, 28 Apr 2023 02:22:59 +0200
   4 Subject: [PATCH 1/2] mt7530: register OF node for internal MDIO bus
   5
   6 The MT753x switches provide a switch-internal MDIO bus for the embedded
   7 PHYs.
   8
   9 Register a OF sub-node on the switch OF-node for this internal MDIO bus.
  10 This allows to configure the embedded PHYs using device-tree.
  11
  12 Signed-off-by: David Bauer <mail@david-bauer.net>
  13 ---
  14  drivers/net/dsa/mt7530.c | 7 ++++++-
  15  1 file changed, 6 insertions(+), 1 deletion(-)
  16
  17 --- a/drivers/net/dsa/mt7530.c
  18 +++ b/drivers/net/dsa/mt7530.c
  19 @@ -2174,10 +2174,13 @@ mt7530_setup_mdio(struct mt7530_priv *pr
  20  {
  21         struct dsa_switch *ds = priv->ds;
  22         struct device *dev = priv->dev;
  23 +       struct device_node *np, *mnp;
  24         struct mii_bus *bus;
  25         static int idx;
  26         int ret;
  27
  28 +       np = priv->dev->of_node;
  29 +
  30         bus = devm_mdiobus_alloc(dev);
  31         if (!bus)
  32                 return -ENOMEM;
  33 @@ -2194,7 +2197,9 @@ mt7530_setup_mdio(struct mt7530_priv *pr
  34         if (priv->irq)
  35                 mt7530_setup_mdio_irq(priv);
  36
  37 -       ret = devm_mdiobus_register(dev, bus);
  38 +       mnp = of_get_child_by_name(np, "mdio");
  39 +       ret = devm_of_mdiobus_register(dev, bus, mnp);
  40 +       of_node_put(mnp);
  41         if (ret) {
  42                 dev_err(dev, "failed to register MDIO bus: %d\n", ret);
  43                 if (priv->irq)