lkml.org 
[lkml]   [2020]   [Feb]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/2] arm64: dts: imx8mm-evk: add phy-reset-gpios for fec1
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@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 = <&ethphy0>;
> + 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 |

\
 
 \ /
  Last update: 2020-02-17 09:21    [W:0.073 / U:7.692 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site