net: dm: fec: Support phy-reset-post-delay property

As per Linux kernel DT binding doc:
- phy-reset-post-delay : Post reset delay in milliseconds. If present then
  a delay of phy-reset-post-delay milliseconds will be observed after the
  phy-reset-gpios has been toggled. Can be omitted thus no delay is
  observed. Delay is in range of 1ms to 1000ms. Other delays are invalid.

Signed-off-by: Andrejs Cainikovs <andrejs.cainikovs@netmodule.com>
Reviewed-by: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Stefano Babic <sbabic@denx.de>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Lukasz Majewski <lukma@denx.de>

diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c
index f991b40b385a712179fa9911e648c2c9c8d6e84d..84f010d80576457ddf2d9f6b67b8e002ab1396df 100644 (file)
--- a/drivers/net/fec_mxc.c
+++ b/drivers/net/fec_mxc.c
@@ -1309,6 +1309,8 @@ static void fec_gpio_reset(struct fec_priv *priv)
                dm_gpio_set_value(&priv->phy_reset_gpio, 1);
                mdelay(priv->reset_delay);
                dm_gpio_set_value(&priv->phy_reset_gpio, 0);
+               if (priv->reset_post_delay)
+                       mdelay(priv->reset_post_delay);
        }
 }
 #endif
@@ -1468,6 +1470,15 @@ static int fecmxc_ofdata_to_platdata(struct udevice *dev)
                /* property value wrong, use default value */
                priv->reset_delay = 1;
        }
+
+       priv->reset_post_delay = dev_read_u32_default(dev,
+                                                     "phy-reset-post-delay",
+                                                     0);
+       if (priv->reset_post_delay > 1000) {
+               printf("FEC MXC: phy reset post delay should be <= 1000ms\n");
+               /* property value wrong, use default value */
+               priv->reset_post_delay = 0;
+       }
 #endif
 
        return 0;

diff --git a/drivers/net/fec_mxc.h b/drivers/net/fec_mxc.h
index e9a661f0a1dd4bcc38cee467cd983567e3493848..e5f2dd75c592b35af5c06d3d6606e8636677ac5c 100644 (file)
--- a/drivers/net/fec_mxc.h
+++ b/drivers/net/fec_mxc.h
@@ -258,6 +258,7 @@ struct fec_priv {
 #ifdef CONFIG_DM_GPIO
        struct gpio_desc phy_reset_gpio;
        uint32_t reset_delay;
+       uint32_t reset_post_delay;
 #endif
 #ifdef CONFIG_DM_ETH
        u32 interface;