[PATCH] net: ftgmac100: Add reset control

[Ramon Fried]

On Thu, Jul 27, 2023 at 4:58 AM Dylan Hung <kobedylan at gmail.com> wrote:
>
> Add optional reset control, especially for the Aspeed SOC. For the
> hardware without a reset line, the reset assertion/deassertion will be
> skipped.
>
> Signed-off-by: Dylan Hung <dylan_hung at aspeedtech.com>
> ---
>  drivers/net/ftgmac100.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
>
> diff --git a/drivers/net/ftgmac100.c b/drivers/net/ftgmac100.c
> index a50cde338a..886b97119d 100644
> --- a/drivers/net/ftgmac100.c
> +++ b/drivers/net/ftgmac100.c
> @@ -13,6 +13,7 @@
>
>  #include <common.h>
>  #include <clk.h>
> +#include <reset.h>
>  #include <cpu_func.h>
>  #include <dm.h>
>  #include <log.h>
> @@ -90,6 +91,7 @@ struct ftgmac100_data {
>         u32 max_speed;
>
>         struct clk_bulk clks;
> +       struct reset_ctl *reset_ctl;
>
>         /* End of RX/TX ring buffer bits. Depend on model */
>         u32 rxdes0_edorr_mask;
> @@ -568,6 +570,8 @@ static int ftgmac100_of_to_plat(struct udevice *dev)
>                 priv->txdes0_edotr_mask = BIT(15);
>         }
>
> +       priv->reset_ctl = devm_reset_control_get_optional(dev, NULL);
> +
>         return clk_get_bulk(dev, &priv->clks);
>  }
>
> @@ -593,6 +597,12 @@ static int ftgmac100_probe(struct udevice *dev)
>         if (ret)
>                 goto out;
>
> +       if (priv->reset_ctl) {
> +               ret = reset_deassert(priv->reset_ctl);
> +               if (ret)
> +                       goto out;
> +       }
> +
>         /*
>          * If DM MDIO is enabled, the MDIO bus will be initialized later in
>          * dm_eth_phy_connect
> @@ -628,6 +638,8 @@ static int ftgmac100_remove(struct udevice *dev)
>         free(priv->phydev);
>         mdio_unregister(priv->bus);
>         mdio_free(priv->bus);
> +       if (priv->reset_ctl)
> +               reset_assert(priv->reset_ctl);
>         clk_release_bulk(&priv->clks);
>
>         return 0;
> --
> 2.25.1
>
Reviewed-by: Ramon Fried <rfried.dev at gmail.com>