Hi, On 20-02-14 16:27, Alifer Moraes wrote: > 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@xxxxxxxxx> > --- > > Originally sent by Peng Fan <peng.fan@xxxxxxx> > > 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>; Where is this gpio muxed? Regards, Marco > + phy-reset-duration = <10>; > fsl,magic-packet; > status = "okay"; > > -- > 2.17.1 > > > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
