Implement device tree property phy-reset-duration to adjust length of
phy reset. Resetting the reset time to 1ms when it's greater than 1000ms
is the documented behavior in dts/Bindings/net/fsl-fec.txt and in the
linux kernel.
Signed-off-by: Stefan Christ <s.christ@xxxxxxxxx>
---
drivers/net/fec_imx.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/net/fec_imx.c b/drivers/net/fec_imx.c
index f19d046..39a5cea 100644
--- a/drivers/net/fec_imx.c
+++ b/drivers/net/fec_imx.c
@@ -654,6 +654,7 @@ static int fec_probe(struct device_d *dev)
int ret;
enum fec_type type;
int phy_reset;
+ u32 msec = 1;
ret = dev_get_drvdata(dev, (const void **)&type);
if (ret)
@@ -684,6 +685,11 @@ 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);
+ /* A sane reset duration should not be longer than 1s */
+ if (msec > 1000)
+ msec = 1;
+
ret = gpio_request(phy_reset, "phy-reset");
if (ret)
goto err_free;
@@ -692,7 +698,7 @@ static int fec_probe(struct device_d *dev)
if (ret)
goto err_free;
- mdelay(1);
+ mdelay(msec);
gpio_set_value(phy_reset, 1);
}
--
1.9.1
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