[U-Boot] [PATCH 1/2] net: dm: fec: Support phy-reset-post-delay property

[Andrejs Cainikovs]

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 at netmodule.com>
---
 drivers/net/fec_mxc.c | 11 +++++++++++
 drivers/net/fec_mxc.h |  1 +
 2 files changed, 12 insertions(+)

diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c
index a14fe43a5b..7fc95fa767 100644
--- a/drivers/net/fec_mxc.c
+++ b/drivers/net/fec_mxc.c
@@ -1315,6 +1315,8 @@ 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
@@ -1474,6 +1476,15 @@ 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 e9a661f0a1..e5f2dd75c5 100644
--- 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;
-- 
2.11.0