On 23/06/2017 at 16:54, Michael Grzeschik wrote:
> In case the MACB is directly connected to a
> non-mdio PHY/device, it should be possible to provide
> a fixed link configuration in the DT.
> 
> Signed-off-by: Michael Grzeschik <m.grzesc...@pengutronix.de>
> ---
>   v1 -> v2: - moved of_phy_connect case and phy_connect_direct into if else 
> cases
>             - moved of_pphy_register_fixed_link into if(np) case
>           - added of_node_put(bp->phy_node); into macb_remove

Hi Michael,

by re-scanning my email backlog, I found this remark that may apply to
your patch (already in Linus' tree actually)...

> ---
>  drivers/net/ethernet/cadence/macb.c | 98 
> ++++++++++++++++++++++---------------
>  drivers/net/ethernet/cadence/macb.h |  1 +
>  2 files changed, 60 insertions(+), 39 deletions(-)
> 
> diff --git a/drivers/net/ethernet/cadence/macb.c 
> b/drivers/net/ethernet/cadence/macb.c
> index 91f7492623d3f..5781f1ede8c6e 100644
> --- a/drivers/net/ethernet/cadence/macb.c
> +++ b/drivers/net/ethernet/cadence/macb.c
> @@ -425,32 +425,40 @@ static int macb_mii_probe(struct net_device *dev)
>       int phy_irq;
>       int ret;
>  
> -     phydev = phy_find_first(bp->mii_bus);
> -     if (!phydev) {
> -             netdev_err(dev, "no PHY found\n");
> -             return -ENXIO;
> -     }
> +     if (bp->phy_node) {
> +             phydev = of_phy_connect(dev, bp->phy_node,
> +                                     &macb_handle_link_change, 0,
> +                                     bp->phy_interface);
> +             if (!phydev)
> +                     return -ENODEV;
> +     } else {
> +             phydev = phy_find_first(bp->mii_bus);
> +             if (!phydev) {
> +                     netdev_err(dev, "no PHY found\n");
> +                     return -ENXIO;
> +             }
>  
> -     pdata = dev_get_platdata(&bp->pdev->dev);
> -     if (pdata) {
> -             if (gpio_is_valid(pdata->phy_irq_pin)) {
> -                     ret = devm_gpio_request(&bp->pdev->dev,
> -                                             pdata->phy_irq_pin, "phy int");
> -                     if (!ret) {
> -                             phy_irq = gpio_to_irq(pdata->phy_irq_pin);
> -                             phydev->irq = (phy_irq < 0) ? PHY_POLL : 
> phy_irq;
> +             pdata = dev_get_platdata(&bp->pdev->dev);
> +             if (pdata) {
> +                     if (gpio_is_valid(pdata->phy_irq_pin)) {
> +                             ret = devm_gpio_request(&bp->pdev->dev,
> +                                                     pdata->phy_irq_pin, 
> "phy int");
> +                             if (!ret) {
> +                                     phy_irq = 
> gpio_to_irq(pdata->phy_irq_pin);
> +                                     phydev->irq = (phy_irq < 0) ? PHY_POLL 
> : phy_irq;
> +                             }
> +                     } else {
> +                             phydev->irq = PHY_POLL;
>                       }
> -             } else {
> -                     phydev->irq = PHY_POLL;
>               }
> -     }
>  
> -     /* attach the mac to the phy */
> -     ret = phy_connect_direct(dev, phydev, &macb_handle_link_change,
> -                              bp->phy_interface);
> -     if (ret) {
> -             netdev_err(dev, "Could not attach to PHY\n");
> -             return ret;
> +             /* attach the mac to the phy */
> +             ret = phy_connect_direct(dev, phydev, &macb_handle_link_change,
> +                                      bp->phy_interface);
> +             if (ret) {
> +                     netdev_err(dev, "Could not attach to PHY\n");
> +                     return ret;
> +             }
>       }
>  
>       /* mask with MAC supported features */
> @@ -499,26 +507,37 @@ static int macb_mii_init(struct macb *bp)
>  
>       np = bp->pdev->dev.of_node;
>       if (np) {
> -             /* try dt phy registration */
> -             err = of_mdiobus_register(bp->mii_bus, np);
> +             if (of_phy_is_fixed_link(np)) {
> +                     if (of_phy_register_fixed_link(np) < 0) {

remark done here by Andrew:
https://www.spinics.net/lists/netdev/msg421186.html

about missing of_phy_deregister_fixed_link().

Can you tell me if you would have time to have a look at it?


Thanks, best regards,
  Nicolas

> +                             dev_err(&bp->pdev->dev,
> +                                     "broken fixed-link specification\n");
> +                             goto err_out_unregister_bus;
> +                     }
> +                     bp->phy_node = of_node_get(np);
>  
> -             /* fallback to standard phy registration if no phy were
> -              * found during dt phy registration
> -              */
> -             if (!err && !phy_find_first(bp->mii_bus)) {
> -                     for (i = 0; i < PHY_MAX_ADDR; i++) {
> -                             struct phy_device *phydev;
> -
> -                             phydev = mdiobus_scan(bp->mii_bus, i);
> -                             if (IS_ERR(phydev) &&
> -                                 PTR_ERR(phydev) != -ENODEV) {
> -                                     err = PTR_ERR(phydev);
> -                                     break;
> +                     err = mdiobus_register(bp->mii_bus);
> +             } else {
> +                     /* try dt phy registration */
> +                     err = of_mdiobus_register(bp->mii_bus, np);
> +
> +                     /* fallback to standard phy registration if no phy were
> +                      * found during dt phy registration
> +                      */
> +                     if (!err && !phy_find_first(bp->mii_bus)) {
> +                             for (i = 0; i < PHY_MAX_ADDR; i++) {
> +                                     struct phy_device *phydev;
> +
> +                                     phydev = mdiobus_scan(bp->mii_bus, i);
> +                                     if (IS_ERR(phydev) &&
> +                                         PTR_ERR(phydev) != -ENODEV) {
> +                                             err = PTR_ERR(phydev);
> +                                             break;
> +                                     }
>                               }
> -                     }
>  
> -                     if (err)
> -                             goto err_out_unregister_bus;
> +                             if (err)
> +                                     goto err_out_unregister_bus;
> +                     }
>               }
>       } else {
>               for (i = 0; i < PHY_MAX_ADDR; i++)
> @@ -3438,6 +3457,7 @@ static int macb_remove(struct platform_device *pdev)
>               clk_disable_unprepare(bp->hclk);
>               clk_disable_unprepare(bp->pclk);
>               clk_disable_unprepare(bp->rx_clk);
> +             of_node_put(bp->phy_node);
>               free_netdev(dev);
>       }
>  
> diff --git a/drivers/net/ethernet/cadence/macb.h 
> b/drivers/net/ethernet/cadence/macb.h
> index ec037b0fa2a4d..2510661102bad 100644
> --- a/drivers/net/ethernet/cadence/macb.h
> +++ b/drivers/net/ethernet/cadence/macb.h
> @@ -930,6 +930,7 @@ struct macb {
>       struct macb_or_gem_ops  macbgem_ops;
>  
>       struct mii_bus          *mii_bus;
> +     struct device_node      *phy_node;
>       int                     link;
>       int                     speed;
>       int                     duplex;
> 


-- 
Nicolas Ferre

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