OpenWrt – Rev 1

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Add support for configuring AT803x GPIO reset via platform data.
This is necessary, because ath79 is not converted to device tree yet.

Signed-off-by: Felix Fietkau <nbd@nbd.name>

--- a/include/linux/platform_data/phy-at803x.h
+++ b/include/linux/platform_data/phy-at803x.h
@@ -6,6 +6,8 @@ struct at803x_platform_data {
        int enable_rgmii_tx_delay:1;
        int enable_rgmii_rx_delay:1;
        int fixup_rgmii_tx_delay:1;
+       int has_reset_gpio:1;
+       int reset_gpio;
 };
 
 #endif /* _PHY_AT803X_PDATA_H */
--- a/drivers/net/phy/at803x.c
+++ b/drivers/net/phy/at803x.c
@@ -259,6 +259,7 @@ static int at803x_resume(struct phy_devi
 
 static int at803x_probe(struct phy_device *phydev)
 {
+       struct at803x_platform_data *pdata;
        struct device *dev = &phydev->mdio.dev;
        struct at803x_priv *priv;
        struct gpio_desc *gpiod_reset;
@@ -271,6 +272,12 @@ static int at803x_probe(struct phy_devic
            phydev->drv->phy_id != ATH8032_PHY_ID)
                goto does_not_require_reset_workaround;
 
+       pdata = dev_get_platdata(dev);
+       if (pdata && pdata->has_reset_gpio) {
+               devm_gpio_request(dev, pdata->reset_gpio, "reset");
+               gpio_direction_output(pdata->reset_gpio, 1);
+       }
+
        gpiod_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
        if (IS_ERR(gpiod_reset))
                return PTR_ERR(gpiod_reset);
@@ -411,15 +418,23 @@ static void at803x_link_change_notify(st
         * cannot recover from by software.
         */
        if (phydev->state == PHY_NOLINK) {
-               if (priv->gpiod_reset && !priv->phy_reset) {
+               if ((priv->gpiod_reset || (pdata && pdata->has_reset_gpio)) &&
+                   !priv->phy_reset) {
                        struct at803x_context context;
 
                        at803x_context_save(phydev, &context);
 
-                       gpiod_set_value(priv->gpiod_reset, 1);
-                       msleep(1);
-                       gpiod_set_value(priv->gpiod_reset, 0);
-                       msleep(1);
+                       if (pdata && pdata->has_reset_gpio) {
+                               gpio_set_value_cansleep(pdata->reset_gpio, 0);
+                               msleep(1);
+                               gpio_set_value_cansleep(pdata->reset_gpio, 1);
+                               msleep(1);
+                       } else {
+                               gpiod_set_value(priv->gpiod_reset, 1);
+                               msleep(1);
+                               gpiod_set_value(priv->gpiod_reset, 0);
+                               msleep(1);
+                       }
 
                        at803x_context_restore(phydev, &context);