From: Alifer Moraes <alifer.wsdm@gmail.com>
To: robh+dt@kernel.org
Cc: mark.rutland@arm.com, shawnguo@kernel.org,
s.hauer@pengutronix.de, kernel@pengutronix.de,
festevam@gmail.com, linux-imx@nxp.com, peng.fan@nxp.com,
leonard.crestez@nxp.com, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
Alifer Moraes <alifer.wsdm@gmail.com>
Subject: [PATCH 1/2] arm64: dts: imx8mm-evk: add phy-reset-gpios for fec1
Date: Fri, 14 Feb 2020 16:27:49 -0300 [thread overview]
Message-ID: <20200214192750.20845-1-alifer.wsdm@gmail.com> (raw)
imx8mm-evk has a GPIO connected to AR8031 Ethernet PHY's reset pin.
Describe it in the device tree, following phy's datasheet reset duration of 10ms.
Tested booting via NFS.
Signed-off-by: Alifer Moraes <alifer.wsdm@gmail.com>
---
Originally sent by Peng Fan <peng.fan@nxp.com>
Back then CONFIG_AT803X_PHY was set as "m" in defconfig so the boot process hung
at nfs boot, now that CONFIG_AT803X_PHY is set as "y" by default, the patch works
correctly.
Peng's original patch missed to pass the phy-reset-duration, according to the AR8031
datasheet the reset GPIO needs to stay low for 10ms.
Original thread: https://lkml.org/lkml/2019/10/21/347
arch/arm64/boot/dts/freescale/imx8mm-evk.dts | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
index 28ab17a277bb..11903ca86f0e 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
@@ -82,6 +82,8 @@
pinctrl-0 = <&pinctrl_fec1>;
phy-mode = "rgmii-id";
phy-handle = <ðphy0>;
+ phy-reset-gpios = <&gpio4 22 GPIO_ACTIVE_LOW>;
+ phy-reset-duration = <10>;
fsl,magic-packet;
status = "okay";
--
2.17.1
next reply other threads:[~2020-02-14 19:27 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-14 19:27 Alifer Moraes [this message]
2020-02-14 19:27 ` [PATCH 2/2] arm64: dts: imx8mq-evk: add phy-reset-gpios for fec1 Alifer Moraes
2020-02-17 8:21 ` Marco Felsch
2020-02-19 1:16 ` Fabio Estevam
2020-02-17 8:20 ` [PATCH 1/2] arm64: dts: imx8mm-evk: " Marco Felsch
2020-02-18 13:02 ` Alifer Moraes
2020-02-19 1:15 ` Fabio Estevam
2020-02-24 1:37 ` Shawn Guo
-- strict thread matches above, loose matches on Subject: below --
2019-10-21 9:21 Peng Fan
2019-10-21 9:44 ` Marco Felsch
2019-10-21 9:46 ` Peng Fan
2019-10-21 9:50 ` Marco Felsch
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