Messages in this thread Patch in this message | | | From | Alifer Moraes <> | Subject | [PATCH 1/2] arm64: dts: imx8mm-evk: add phy-reset-gpios for fec1 | Date | Fri, 14 Feb 2020 16:27:49 -0300 |
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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
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