[PATCH v3 3/7] net: macb: Add phy address to read it from device tree

[Anup Patel]

On Tue, Nov 10, 2020 at 4:16 PM Padmarao Begari
<padmarao.begari at microchip.com> wrote:
>
> Read phy address from device tree and use it to find the phy device
> if not found then search in the range of 0 to 31.
>
> Signed-off-by: Padmarao Begari <padmarao.begari at microchip.com>
> ---
>  drivers/net/macb.c | 17 +++++++++++++++--
>  1 file changed, 15 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/macb.c b/drivers/net/macb.c
> index 9ccbb7a166..81b1f1ba26 100644
> --- a/drivers/net/macb.c
> +++ b/drivers/net/macb.c
> @@ -531,6 +531,12 @@ static int macb_phy_find(struct macb_device *macb, const char *name)
>         int i;
>         u16 phy_id;
>
> +       phy_id = macb_mdio_read(macb, macb->phy_addr, MII_PHYSID1);
> +       if (phy_id != 0xffff) {
> +               printf("%s: PHY present at %d\n", name, macb->phy_addr);
> +               return 0;
> +       }
> +
>         /* Search for PHY... */
>         for (i = 0; i < 32; i++) {
>                 macb->phy_addr = i;
> @@ -1315,11 +1321,12 @@ static int macb_eth_probe(struct udevice *dev)
>  {
>         struct eth_pdata *pdata = dev_get_platdata(dev);
>         struct macb_device *macb = dev_get_priv(dev);
> +       struct ofnode_phandle_args phandle_args;
>         const char *phy_mode;
>         int ret;
>
> -       phy_mode = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "phy-mode",
> -                              NULL);
> +       phy_mode = dev_read_prop(dev, "phy-mode", NULL);
> +
>         if (phy_mode)
>                 macb->phy_interface = phy_get_interface_by_name(phy_mode);
>         if (macb->phy_interface == -1) {
> @@ -1327,6 +1334,12 @@ static int macb_eth_probe(struct udevice *dev)
>                 return -EINVAL;
>         }
>
> +       /* Read phyaddr from DT */
> +       if (!dev_read_phandle_with_args(dev, "phy-handle", NULL, 0, 0,
> +                                       &phandle_args))
> +               macb->phy_addr = ofnode_read_u32_default(phandle_args.node,
> +                                                        "reg", -1);
> +
>         macb->regs = (void *)pdata->iobase;
>
>         macb->is_big_endian = (cpu_to_be32(0x12345678) == 0x12345678);
> --
> 2.17.1
>

Looks good to me.

Reviewed-by: Anup Patel <anup.patel at wdc.com>

This patch also needs to be tested on SiFive Unleashed because it has
same ethernet controller.

Regards,
Anup