net: ftgmac100: Add reset control

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@aspeedtech.com>
Reviewed-by: Ryan Chen <ryan_chen@aspeedtech.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>

diff --git a/drivers/net/ftgmac100.c b/drivers/net/ftgmac100.c
index 587d3658fa9fb7b03d859449b8849739e01e3c0a..9b536fd5ab890dbbbbda76fbe6fde7fc7c57bb83 100644 (file)
--- 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>
@@ -91,6 +92,7 @@ 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;
@@ -569,6 +571,8 @@ 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);
 }
 
@@ -594,6 +598,12 @@ 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
@@ -629,6 +639,8 @@ 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;