Re: [PATCH v1 20/43] net: cirrus: add DT support for Cirrus EP93xx

[Alexander Sverdlin]

Hi!

On Thu, 2023-06-01 at 08:45 +0300, Nikita Shubin wrote:
> - find register range from the device tree
> - get "copy_addr" from the device tree
> - get phy_id from the device tree
> 
> Signed-off-by: Nikita Shubin <nikita.shubin@xxxxxxxxxxx>

Works fine on EDB9302

Tested-by: Alexander Sverdlin <alexander.sverdlin@xxxxxxxxx>

> ---
> 
> Notes:
>     v0 -> v1:
>     
>     - dropped platform data entirely
>     - dropped copy_addr
>     - use phy-handle instead of using non-conventional phy-id
> 
>  arch/arm/mach-ep93xx/platform.h          |  2 +-
>  drivers/net/ethernet/cirrus/ep93xx_eth.c | 67 +++++++++++++-----------
>  2 files changed, 37 insertions(+), 32 deletions(-)
> 
> diff --git a/arch/arm/mach-ep93xx/platform.h b/arch/arm/mach-ep93xx/platform.h
> index 5fb1b919133f..3cf2113491d8 100644
> --- a/arch/arm/mach-ep93xx/platform.h
> +++ b/arch/arm/mach-ep93xx/platform.h
> @@ -5,8 +5,8 @@
>  
>  #ifndef __ASSEMBLY__
>  
> -#include <linux/platform_data/eth-ep93xx.h>
>  #include <linux/reboot.h>
> +#include <linux/platform_data/eth-ep93xx.h>
>  
>  struct device;
>  struct i2c_board_info;
> diff --git a/drivers/net/ethernet/cirrus/ep93xx_eth.c b/drivers/net/ethernet/cirrus/ep93xx_eth.c
> index 8627ab19d470..41096d4830ff 100644
> --- a/drivers/net/ethernet/cirrus/ep93xx_eth.c
> +++ b/drivers/net/ethernet/cirrus/ep93xx_eth.c
> @@ -17,12 +17,11 @@
>  #include <linux/interrupt.h>
>  #include <linux/moduleparam.h>
>  #include <linux/platform_device.h>
> +#include <linux/of.h>
>  #include <linux/delay.h>
>  #include <linux/io.h>
>  #include <linux/slab.h>
>  
> -#include <linux/platform_data/eth-ep93xx.h>
> -
>  #define DRV_MODULE_NAME                "ep93xx-eth"
>  
>  #define RX_QUEUE_ENTRIES       64
> @@ -738,25 +737,6 @@ static const struct net_device_ops ep93xx_netdev_ops = {
>         .ndo_set_mac_address    = eth_mac_addr,
>  };
>  
> -static struct net_device *ep93xx_dev_alloc(struct ep93xx_eth_data *data)
> -{
> -       struct net_device *dev;
> -
> -       dev = alloc_etherdev(sizeof(struct ep93xx_priv));
> -       if (dev == NULL)
> -               return NULL;
> -
> -       eth_hw_addr_set(dev, data->dev_addr);
> -
> -       dev->ethtool_ops = &ep93xx_ethtool_ops;
> -       dev->netdev_ops = &ep93xx_netdev_ops;
> -
> -       dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
> -
> -       return dev;
> -}
> -
> -
>  static int ep93xx_eth_remove(struct platform_device *pdev)
>  {
>         struct net_device *dev;
> @@ -788,27 +768,51 @@ static int ep93xx_eth_remove(struct platform_device *pdev)
>  
>  static int ep93xx_eth_probe(struct platform_device *pdev)
>  {
> -       struct ep93xx_eth_data *data;
>         struct net_device *dev;
>         struct ep93xx_priv *ep;
>         struct resource *mem;
> +       void __iomem *base_addr;
> +       struct device_node *np;
> +       u32 phy_id;
>         int irq;
>         int err;
>  
>         if (pdev == NULL)
>                 return -ENODEV;
> -       data = dev_get_platdata(&pdev->dev);
>  
>         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>         irq = platform_get_irq(pdev, 0);
>         if (!mem || irq < 0)
>                 return -ENXIO;
>  
> -       dev = ep93xx_dev_alloc(data);
> +       base_addr = ioremap(mem->start, resource_size(mem));
> +       if (!base_addr) {
> +               dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
> +               return -EIO;
> +       }
> +
> +       np = of_parse_phandle(pdev->dev.of_node, "phy-handle", 0);
> +       if (!np) {
> +               dev_err(&pdev->dev, "Please provide \"phy-handle\"\n");
> +               return -ENODEV;
> +       }
> +
> +       if (of_property_read_u32(np, "reg", &phy_id)) {
> +               dev_err(&pdev->dev, "Failed to locate \"phy_id\"\n");
> +               return -ENOENT;
> +       }
> +
> +       dev = alloc_etherdev(sizeof(struct ep93xx_priv));
>         if (dev == NULL) {
>                 err = -ENOMEM;
>                 goto err_out;
>         }
> +
> +       eth_hw_addr_set(dev, base_addr + 0x50);
> +       dev->ethtool_ops = &ep93xx_ethtool_ops;
> +       dev->netdev_ops = &ep93xx_netdev_ops;
> +       dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
> +
>         ep = netdev_priv(dev);
>         ep->dev = dev;
>         SET_NETDEV_DEV(dev, &pdev->dev);
> @@ -824,15 +828,10 @@ static int ep93xx_eth_probe(struct platform_device *pdev)
>                 goto err_out;
>         }
>  
> -       ep->base_addr = ioremap(mem->start, resource_size(mem));
> -       if (ep->base_addr == NULL) {
> -               dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
> -               err = -EIO;
> -               goto err_out;
> -       }
> +       ep->base_addr = base_addr;
>         ep->irq = irq;
>  
> -       ep->mii.phy_id = data->phy_id;
> +       ep->mii.phy_id = phy_id;
>         ep->mii.phy_id_mask = 0x1f;
>         ep->mii.reg_num_mask = 0x1f;
>         ep->mii.dev = dev;
> @@ -859,12 +858,18 @@ static int ep93xx_eth_probe(struct platform_device *pdev)
>         return err;
>  }
>  
> +static const struct of_device_id ep93xx_eth_of_ids[] = {
> +       { .compatible = "cirrus,ep9301-eth" },
> +       { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, ep93xx_eth_of_ids);
>  
>  static struct platform_driver ep93xx_eth_driver = {
>         .probe          = ep93xx_eth_probe,
>         .remove         = ep93xx_eth_remove,
>         .driver         = {
>                 .name   = "ep93xx-eth",
> +               .of_match_table = ep93xx_eth_of_ids,
>         },
>  };
>  

-- 
Alexander Sverdlin.