[PATCH v2 5/5] net: airoha: bind MDIO controller on Ethernet load

[Jerome Forissier]

Hi Christian,

On 9/20/25 18:09, Christian Marangi wrote:
> Bind MDIO controller on Ethernet Controller load. The Airoha AN7581 SoC
> have an integrated Switch based on MT7531 (or more saying MT7988).
> 
> Attach it to the switch node to support scanning for MDIO devices on the
> BUS.
> 
> Signed-off-by: Christian Marangi <ansuelsmth at gmail.com>
> ---
>  drivers/net/Kconfig      |  1 +
>  drivers/net/airoha_eth.c | 26 ++++++++++++++++++++++++++
>  2 files changed, 27 insertions(+)
> 
> diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
> index cee4a3fc9bd..ce7c7e6297e 100644
> --- a/drivers/net/Kconfig
> +++ b/drivers/net/Kconfig
> @@ -126,6 +126,7 @@ config AIROHA_ETH
>  	depends on ARCH_AIROHA
>  	select PHYLIB
>  	select DM_RESET
> +	select MDIO_MT7531
>  	help
>  	  This Driver support Airoha Ethernet QDMA Driver
>  	  Say Y to enable support for the Airoha Ethernet QDMA.
> diff --git a/drivers/net/airoha_eth.c b/drivers/net/airoha_eth.c
> index 6588eb3a806..6be6ec2845b 100644
> --- a/drivers/net/airoha_eth.c
> +++ b/drivers/net/airoha_eth.c
> @@ -971,6 +971,31 @@ static int arht_eth_write_hwaddr(struct udevice *dev)
>  	return 0;
>  }
>  
> +static int airoha_eth_bind(struct udevice *dev)
> +{
> +	struct airoha_eth_soc_data *data = (void *)dev_get_driver_data(dev);

data is unused and causes a build warning which is an error in CI.

> +	struct udevice *mdio_dev;
> +	ofnode switch_node;
> +	int ret = 0;
> +
> +	if (!CONFIG_IS_ENABLED(MDIO_MT7531))
> +		return 0;
> +
> +	switch_node = ofnode_by_compatible(ofnode_null(),
> +					   "airoha,en7581-switch");
> +	if (!ofnode_valid(switch_node)) {
> +		debug("Warning: missing switch node\n");
> +		return 0;
> +	}
> +
> +	ret = device_bind_driver_to_node(dev, "mt7531-mdio", "mdio",
> +					 switch_node, &mdio_dev);

This needs #include <dm/lists.h> AFAICT

> +	if (ret)
> +		debug("Warning: failed to bind mdio controller\n");
> +
> +	return 0;
> +}
> +
>  static const struct udevice_id airoha_eth_ids[] = {
>  	{ .compatible = "airoha,en7581-eth" },
>  	{ }
> @@ -990,6 +1015,7 @@ U_BOOT_DRIVER(airoha_eth) = {
>  	.id = UCLASS_ETH,
>  	.of_match = airoha_eth_ids,
>  	.probe = airoha_eth_probe,
> +	.bind = airoha_eth_bind,
>  	.ops = &airoha_eth_ops,
>  	.priv_auto = sizeof(struct airoha_eth),
>  	.plat_auto = sizeof(struct eth_pdata),

I have picked up the four other patches in this series [1]. Please fix
and resend only that one.

[1] https://source.denx.de/u-boot/custodians/u-boot-net/-/commits/net-20251022

Thanks,
-- 
Jerome