target/linux/ar71xx/patches-4.14/902-at803x-add-reset-gpio-pdata.patch

   1 Add support for configuring AT803x GPIO reset via platform data.
   2 This is necessary, because ath79 is not converted to device tree yet.
   3
   4 Signed-off-by: Felix Fietkau <nbd@nbd.name>
   5
   6 --- a/include/linux/platform_data/phy-at803x.h
   7 +++ b/include/linux/platform_data/phy-at803x.h
   8 @@ -6,6 +6,8 @@ struct at803x_platform_data {
   9         int enable_rgmii_tx_delay:1;
  10         int enable_rgmii_rx_delay:1;
  11         int fixup_rgmii_tx_delay:1;
  12 +       int has_reset_gpio:1;
  13 +       int reset_gpio;
  14  };
  15
  16  #endif /* _PHY_AT803X_PDATA_H */
  17 --- a/drivers/net/phy/at803x.c
  18 +++ b/drivers/net/phy/at803x.c
  19 @@ -259,6 +259,7 @@ static int at803x_resume(struct phy_devi
  20
  21  static int at803x_probe(struct phy_device *phydev)
  22  {
  23 +       struct at803x_platform_data *pdata;
  24         struct device *dev = &phydev->mdio.dev;
  25         struct at803x_priv *priv;
  26         struct gpio_desc *gpiod_reset;
  27 @@ -271,6 +272,12 @@ static int at803x_probe(struct phy_devic
  28             phydev->drv->phy_id != ATH8032_PHY_ID)
  29                 goto does_not_require_reset_workaround;
  30
  31 +       pdata = dev_get_platdata(dev);
  32 +       if (pdata && pdata->has_reset_gpio) {
  33 +               devm_gpio_request(dev, pdata->reset_gpio, "reset");
  34 +               gpio_direction_output(pdata->reset_gpio, 1);
  35 +       }
  36 +
  37         gpiod_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
  38         if (IS_ERR(gpiod_reset))
  39                 return PTR_ERR(gpiod_reset);
  40 @@ -402,15 +409,23 @@ static void at803x_link_change_notify(st
  41          * cannot recover from by software.
  42          */
  43         if (phydev->state == PHY_NOLINK) {
  44 -               if (priv->gpiod_reset && !priv->phy_reset) {
  45 +               if ((priv->gpiod_reset || (pdata && pdata->has_reset_gpio)) &&
  46 +                   !priv->phy_reset) {
  47                         struct at803x_context context;
  48
  49                         at803x_context_save(phydev, &context);
  50
  51 -                       gpiod_set_value(priv->gpiod_reset, 1);
  52 -                       msleep(1);
  53 -                       gpiod_set_value(priv->gpiod_reset, 0);
  54 -                       msleep(1);
  55 +                       if (pdata && pdata->has_reset_gpio) {
  56 +                               gpio_set_value_cansleep(pdata->reset_gpio, 0);
  57 +                               msleep(1);
  58 +                               gpio_set_value_cansleep(pdata->reset_gpio, 1);
  59 +                               msleep(1);
  60 +                       } else {
  61 +                               gpiod_set_value(priv->gpiod_reset, 1);
  62 +                               msleep(1);
  63 +                               gpiod_set_value(priv->gpiod_reset, 0);
  64 +                               msleep(1);
  65 +                       }
  66
  67                         at803x_context_restore(phydev, &context);
  68