[PATCH 5.0 039/101] ARM: dts: pfla02: increase phy reset duration

From: Greg Kroah-Hartman
Date: Thu May 02 2019 - 11:38:36 EST

[ Upstream commit 032f85c9360fb1a08385c584c2c4ed114b33c260 ]

Increase the reset duration to ensure correct phy functionality. The
reset duration is taken from barebox commit 52fdd510de ("ARM: dts:
pfla02: use long enough reset for ethernet phy"):

Use a longer reset time for ethernet phy Micrel KSZ9031RNX. Otherwise a
small percentage of modules have 'transmission timeouts' errors like

barebox@Phytec phyFLEX-i.MX6 Quad Carrier-Board:/ ifup eth0
warning: No MAC address set. Using random address 7e:94:4d:02:f8:f3
eth0: 1000Mbps full duplex link detected
eth0: transmission timeout
T eth0: transmission timeout
T eth0: transmission timeout
T eth0: transmission timeout
T eth0: transmission timeout

Cc: Stefan Christ <s.christ@xxxxxxxxx>
Cc: Christian Hemp <c.hemp@xxxxxxxxx>
Signed-off-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx>
Fixes: 3180f956668e ("ARM: dts: Phytec imx6q pfla02 and pbab01 support")
Signed-off-by: Shawn Guo <shawnguo@xxxxxxxxxx>
Signed-off-by: Sasha Levin (Microsoft) <sashal@xxxxxxxxxx>
arch/arm/boot/dts/imx6qdl-phytec-pfla02.dtsi | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/imx6qdl-phytec-pfla02.dtsi b/arch/arm/boot/dts/imx6qdl-phytec-pfla02.dtsi
index 1b50b01e9bac..65d03c5d409b 100644
--- a/arch/arm/boot/dts/imx6qdl-phytec-pfla02.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-phytec-pfla02.dtsi
@@ -90,6 +90,7 @@
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_enet>;
phy-mode = "rgmii";
+ phy-reset-duration = <10>; /* in msecs */
phy-reset-gpios = <&gpio3 23 GPIO_ACTIVE_LOW>;
phy-supply = <&vdd_eth_io_reg>;
status = "disabled";