Some PHY require to wait for a bit after the reset GPIO has been
toggled. This adds support for the DT property `phy-reset-post-delay`
which gives the delay in milliseconds to wait after reset.
If the DT property is not given, no delay is observed. Post reset
delay greater than 1000ms are invalid.
Signed-off-by: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx>
---
drivers/net/fec_imx.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/net/fec_imx.c b/drivers/net/fec_imx.c
index 8cf7c4fbda..d506fd64f1 100644
--- a/drivers/net/fec_imx.c
+++ b/drivers/net/fec_imx.c
@@ -743,7 +743,7 @@ static int fec_probe(struct device_d *dev)
int ret;
enum fec_type type;
int phy_reset;
- u32 msec = 1;
+ u32 msec = 1, phy_post_delay = 0;
u64 start;
ret = dev_get_drvdata(dev, (const void **)&type);
@@ -781,6 +781,11 @@ static int fec_probe(struct device_d *dev)
phy_reset = of_get_named_gpio(dev->device_node, "phy-reset-gpios", 0);
if (gpio_is_valid(phy_reset)) {
of_property_read_u32(dev->device_node, "phy-reset-duration", &msec);
+ of_property_read_u32(dev->device_node, "phy-reset-post-delay",
+ &phy_post_delay);
+ /* valid reset duration should be less than 1s */
+ if (phy_post_delay > 1000)
+ goto release_res;
ret = gpio_request(phy_reset, "phy-reset");
if (ret)
@@ -792,6 +797,9 @@ static int fec_probe(struct device_d *dev)
mdelay(msec);
gpio_set_value(phy_reset, 1);
+
+ if (phy_post_delay)
+ mdelay(phy_post_delay);
}
/* Reset chip. */
--
2.11.0
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